Merge pull request #2011 from sjanel/bugfix/fixclangcompilation

Fix compilation error in clang 13 in C++20 mode - ambiguous call to log function

.clang-format

@@ -104,5 +104,6 @@ SpacesInSquareBrackets: false
 Standard:        Cpp11
 TabWidth:        8
 UseTab:          Never
+IndentPPDirectives: AfterHash
 ...
 

.clang-tidy

@@ -2,7 +2,7 @@ Checks: 'cppcoreguidelines-*,
 performance-*,
 modernize-*,
 google-*,
-misc-*,
+misc-*
 cert-*,
 readability-*,
 clang-analyzer-*,

.travis.yml

@@ -5,7 +5,7 @@
 sudo: required
 language: cpp
 
-# gcc 4.8
+# gcc t
 addons: &gcc48
   apt:
     packages:
@@ -21,6 +21,16 @@ addons: &gcc7
     sources:
       - ubuntu-toolchain-r-test
 
+
+# gcc 9.0
+addons: &gcc9
+  apt:
+    packages:
+      - g++-9
+    sources:
+      - ubuntu-toolchain-r-test
+
+
 # Clang 3.5
 addons: &clang35
   apt:
@@ -40,47 +50,63 @@ addons: &clang10
     sources:
       - sourceline: "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-10 main"
         key_url: "https://apt.llvm.org/llvm-snapshot.gpg.key"
+        
+addons: &clang12
+  apt:
+    packages:
+      - clang-12
+      - lldb-12
+      - lld-12
+    sources:
+      - sourceline: "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-12 main"
+        key_url: "https://apt.llvm.org/llvm-snapshot.gpg.key"        
 
 
 matrix:
   include:
-    # Test gcc-4.8: C++11, Build=Debug/Release
+    # Test gcc-4.8: C++11, Build=Release
-    - env: GCC_VERSION=4.8 BUILD_TYPE=Debug CPP=11
-      os: linux
-      addons: *gcc48
-
     - env: GCC_VERSION=4.8 BUILD_TYPE=Release CPP=11
       os: linux
       addons: *gcc48
-
+      
+    # Test gcc-7: C++11, Build=Release
     - env: GCC_VERSION=7 BUILD_TYPE=Release CPP=11
       os: linux
       addons: *gcc7
-
+      
-    # Test clang-3.5: C++11, Build=Debug/Release
+     # Test gcc-9: C++17, Build=Release
-    - env: CLANG_VERSION=3.5 BUILD_TYPE=Debug CPP=11
+    - env: GCC_VERSION=9 BUILD_TYPE=Release CPP=17
       os: linux
-      addons: *clang35
+      addons: *gcc9
 
+    # Test clang-3.5: C++11, Build=Release
     - env: CLANG_VERSION=3.5 BUILD_TYPE=Release CPP=11
       os: linux
       addons: *clang35
 
-      # osx
+    # Text osx
     - env: BUILD_TYPE=Release CPP=11 ASAN=Off TSAN=Off
       os: osx
 
-    # Test clang-10.0: C++11, Build=Debug/Release
+    # Test clang-10.0: C++11, Build=Release
-    - env: CLANG_VERSION=10 BUILD_TYPE=Debug CPP=11
-      os: linux
-      dist: bionic
-      addons: *clang10
-
     - env: CLANG_VERSION=10 BUILD_TYPE=Release CPP=11 ASAN=On
       os: linux
       dist: bionic
       addons: *clang10
-
+      
+    # Test clang-10.0: C++17, Build=Debug
+    - env: CLANG_VERSION=10 BUILD_TYPE=Debug CPP=17 ASAN=Off
+      os: linux
+      dist: bionic
+      addons: *clang10
+      
+            
+    # Test clang-12.0: C++17, Build=Debug
+    - env: CLANG_VERSION=12 BUILD_TYPE=Debug CPP=17 ASAN=Off
+      os: linux
+      dist: bionic
+      addons: *clang12
+                        
 
 before_script:
   - if [ -n "$GCC_VERSION" ]; then export CXX="g++-${GCC_VERSION}" CC="gcc-${GCC_VERSION}"; fi

CMakeLists.txt

@@ -15,6 +15,13 @@ message(STATUS "Build spdlog: ${SPDLOG_VERSION}")
 
 include(GNUInstallDirs)
 
+# ---------------------------------------------------------------------------------------
+# Set CMake policies to support later version behaviour
+# ---------------------------------------------------------------------------------------
+if(POLICY CMP0077)
+    cmake_policy(SET CMP0077 NEW) # option() honors variables already set
+endif()
+
 # ---------------------------------------------------------------------------------------
 # Set default build to release
 # ---------------------------------------------------------------------------------------
@@ -30,9 +37,9 @@ if(NOT CMAKE_CXX_STANDARD)
     set(CMAKE_CXX_STANDARD_REQUIRED ON)
 endif()
 
-# make sure __cplusplus is defined when using msvc
+# make sure __cplusplus is defined when using msvc and enable parallel build
 if(MSVC)
-    string(APPEND CMAKE_CXX_FLAGS " /Zc:__cplusplus")
+    string(APPEND CMAKE_CXX_FLAGS " /Zc:__cplusplus /MP")
 endif()
 
 set(CMAKE_CXX_EXTENSIONS OFF)
@@ -92,10 +99,15 @@ endif()
 if(WIN32)
     option(SPDLOG_WCHAR_SUPPORT "Support wchar api" OFF)
     option(SPDLOG_WCHAR_FILENAMES "Support wchar filenames" OFF)
+else()
+    set(SPDLOG_WCHAR_SUPPORT OFF CACHE BOOL "non supported option" FORCE)
+    set(SPDLOG_WCHAR_FILENAMES OFF CACHE BOOL "non supported option" FORCE)
 endif()
+
 if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-    option(SPDLOG_CLOCK_COARSE
+    option(SPDLOG_CLOCK_COARSE "Use CLOCK_REALTIME_COARSE instead of the regular clock," OFF)
-           "Use the much faster (but much less accurate) CLOCK_REALTIME_COARSE instead of the regular clock," OFF)
+else()
+    set(SPDLOG_CLOCK_COARSE OFF CACHE BOOL "non supported option" FORCE)
 endif()
 
 option(SPDLOG_PREVENT_CHILD_FD "Prevent from child processes to inherit log file descriptors" OFF)
@@ -137,8 +149,8 @@ if(SPDLOG_BUILD_SHARED OR BUILD_SHARED_LIBS)
     add_library(spdlog SHARED ${SPDLOG_SRCS} ${SPDLOG_ALL_HEADERS})
     target_compile_definitions(spdlog PUBLIC SPDLOG_SHARED_LIB)
     if(MSVC)
-        target_compile_options(spdlog PUBLIC 
+        target_compile_options(spdlog PUBLIC $<$<AND:$<CXX_COMPILER_ID:MSVC>,$<NOT:$<COMPILE_LANGUAGE:CUDA>>>:/wd4251
-            $<$<AND:$<CXX_COMPILER_ID:MSVC>,$<NOT:$<COMPILE_LANGUAGE:CUDA>>>:/wd4251 /wd4275>)
+                                             /wd4275>)
     endif()
     if(NOT SPDLOG_FMT_EXTERNAL AND NOT SPDLOG_FMT_EXTERNAL_HO)
         target_compile_definitions(spdlog PRIVATE FMT_EXPORT PUBLIC FMT_SHARED)
@@ -198,10 +210,10 @@ endif()
 # ---------------------------------------------------------------------------------------
 # Add required libraries for Android CMake build
 # ---------------------------------------------------------------------------------------
-if (ANDROID)
+if(ANDROID)
     target_link_libraries(spdlog PUBLIC log)
     target_link_libraries(spdlog_header_only INTERFACE log)
-endif ()
+endif()
 
 # ---------------------------------------------------------------------------------------
 # Misc definitions according to tweak options
@@ -305,4 +317,3 @@ if(SPDLOG_INSTALL)
     # ---------------------------------------------------------------------------------------
     include(cmake/spdlogCPack.cmake)
 endif()
-

README.md

@@ -1,6 +1,6 @@
 # spdlog
 
-Very fast, header-only/compiled, C++ logging library. [![Build Status](https://travis-ci.org/gabime/spdlog.svg?branch=v1.x)](https://travis-ci.org/gabime/spdlog)  [![Build status](https://ci.appveyor.com/api/projects/status/d2jnxclg20vd0o50?svg=true)](https://ci.appveyor.com/project/gabime/spdlog) [![Release](https://img.shields.io/github/release/gabime/spdlog.svg)](https://github.com/gabime/spdlog/releases/latest)
+Very fast, header-only/compiled, C++ logging library. [![Build Status](https://travis-ci.com/gabime/spdlog.svg?branch=v1.x)](https://travis-ci.com/gabime/spdlog)  [![Build status](https://ci.appveyor.com/api/projects/status/d2jnxclg20vd0o50?svg=true)](https://ci.appveyor.com/project/gabime/spdlog) [![Release](https://img.shields.io/github/release/gabime/spdlog.svg)](https://github.com/gabime/spdlog/releases/latest)
 
 ## Install 
 #### Header only version
@@ -49,7 +49,7 @@ $ cmake .. && make -j
     * syslog.
     * Windows event log.
     * Windows debugger (```OutputDebugString(..)```).
-    * Easily extendable with custom log targets  (just implement a single function in the [sink](include/spdlog/sinks/sink.h) interface).
+    * Easily [extendable](https://github.com/gabime/spdlog/wiki/4.-Sinks#implementing-your-own-sink) with custom log targets.
 * Log filtering - log levels can be modified in runtime as well as in compile time.
 * Support for loading log levels from argv or from environment var.
 * [Backtrace](#backtrace-support) support - store debug messages in a ring buffer and display later on demand.
@@ -143,8 +143,9 @@ void daily_example()
 ---
 #### Backtrace support
 ```c++
-// Loggers can store in a ring buffer all messages (including debug/trace) and display later on demand.
+// Debug messages can be stored in a ring buffer instead of being logged immediately.
-// When needed, call dump_backtrace() to see them
+// This is useful in order to display debug logs only when really nededed (e.g. when error happens).
+// When needed, call dump_backtrace() to see them.
 
 spdlog::enable_backtrace(32); // Store the latest 32 messages in a buffer. Older messages will be dropped.
 // or my_logger->enable_backtrace(32)..

appveyor.yml

@@ -50,6 +50,13 @@ environment:
       WCHAR: 'ON'
       WCHAR_FILES: 'ON'
       BUILD_EXAMPLE: 'OFF'
+    - GENERATOR: '"Visual Studio 16 2019" -A x64'
+      BUILD_TYPE: Release
+      BUILD_SHARED: 'ON'
+      WCHAR: 'OFF'
+      WCHAR_FILES: 'OFF'
+      BUILD_EXAMPLE: 'OFF'
+      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
 build_script:
   - cmd: >-
       set

bench/CMakeLists.txt

@@ -10,17 +10,15 @@ endif()
 
 find_package(Threads REQUIRED)
 find_package(benchmark CONFIG)
-if (NOT benchmark_FOUND)
+if(NOT benchmark_FOUND)
     message(STATUS "Using CMake Version ${CMAKE_VERSION}")
-    if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.11.0")
+    if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.11.0")
-        # User can fetch googlebenchmark 			
+        # User can fetch googlebenchmark
         message(STATUS "Downloading GoogleBenchmark")
         include(FetchContent)
         set(BENCHMARK_ENABLE_GTEST_TESTS OFF CACHE INTERNAL "")
         # Do not build and run googlebenchmark tests
-        FetchContent_Declare(googlebenchmark
+        FetchContent_Declare(googlebenchmark GIT_REPOSITORY https://github.com/google/benchmark.git GIT_TAG v1.5.2)
-            GIT_REPOSITORY https://github.com/google/benchmark.git
-            GIT_TAG v1.5.2)
 
         FetchContent_MakeAvailable(googlebenchmark)
     else()

bench/async_bench.cpp

@@ -11,9 +11,9 @@
 #include "spdlog/sinks/basic_file_sink.h"
 
 #ifdef SPDLOG_FMT_EXTERNAL
-#include <fmt/locale.h>
+#    include <fmt/format.h>
 #else
-#include "spdlog/fmt/bundled/locale.h"
+#    include "spdlog/fmt/bundled/format.h"
 #endif
 
 #include "utils.h"
@@ -32,9 +32,9 @@ using namespace utils;
 void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
 
 #ifdef _MSC_VER
-#pragma warning(push)
+#    pragma warning(push)
-#pragma warning(disable : 4996) // disable fopen warning under msvc
+#    pragma warning(disable : 4996) // disable fopen warning under msvc
-#endif // _MSC_VER
+#endif                              // _MSC_VER
 
 int count_lines(const char *filename)
 {
@@ -64,7 +64,7 @@ void verify_file(const char *filename, int expected_count)
 }
 
 #ifdef _MSC_VER
-#pragma warning(pop)
+#    pragma warning(pop)
 #endif
 
 int main(int argc, char *argv[])
@@ -103,12 +103,11 @@ int main(int argc, char *argv[])
 
         auto slot_size = sizeof(spdlog::details::async_msg);
         spdlog::info("-------------------------------------------------");
-        spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Messages     : {:L}", howmany));
+        spdlog::info("Messages     : {:L}", howmany);
-        spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Threads      : {:L}", threads));
+        spdlog::info("Threads      : {:L}", threads);
-        spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Queue        : {:L} slots", queue_size));
+        spdlog::info("Queue        : {:L} slots", queue_size);
-        spdlog::info(fmt::format(
+        spdlog::info("Queue memory : {:L} x {:L} = {:L} KB ", queue_size, slot_size, (queue_size * slot_size) / 1024);
-            std::locale("en_US.UTF-8"), "Queue memory : {:L} x {:L} = {:L} KB ", queue_size, slot_size, (queue_size * slot_size) / 1024));
+        spdlog::info("Total iters  : {:L}", iters);
-        spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Total iters  : {:L}", iters));
         spdlog::info("-------------------------------------------------");
 
         const char *filename = "logs/basic_async.log";
@@ -181,5 +180,5 @@ void bench_mt(int howmany, std::shared_ptr<spdlog::logger> logger, int thread_co
 
     auto delta = high_resolution_clock::now() - start;
     auto delta_d = duration_cast<duration<double>>(delta).count();
-    spdlog::info(fmt::format(std::locale("en_US.UTF-8"), "Elapsed: {} secs\t {:L}/sec", delta_d, int(howmany / delta_d)));
+    spdlog::info("Elapsed: {} secs\t {:L}/sec", delta_d, int(howmany / delta_d));
 }

bench/bench.cpp

@@ -13,9 +13,9 @@
 #include "spdlog/sinks/rotating_file_sink.h"
 
 #ifdef SPDLOG_FMT_EXTERNAL
-#include <fmt/locale.h>
+#    include <fmt/locale.h>
 #else
-#include "spdlog/fmt/bundled/locale.h"
+#    include "spdlog/fmt/bundled/format.h"
 #endif
 
 #include "utils.h"
@@ -128,7 +128,7 @@ int main(int argc, char *argv[])
 
         if (threads > max_threads)
         {
-            throw std::runtime_error(fmt::format("Number of threads exceeds maximum({}})", max_threads));
+            throw std::runtime_error(fmt::format("Number of threads exceeds maximum({})", max_threads));
         }
 
         bench_single_threaded(iters);

cmake/utils.cmake

@@ -42,6 +42,7 @@ function(spdlog_enable_warnings target_name)
                     -Wextra
                     -Wconversion
                     -pedantic
+                    -Werror
                     -Wfatal-errors>
                     $<$<CXX_COMPILER_ID:MSVC>:${MSVC_OPTIONS}>)
     endif()
@@ -59,4 +60,3 @@ function(spdlog_enable_sanitizer target_name)
     target_compile_options(${target_name} PRIVATE -fno-omit-frame-pointer)
     target_link_libraries(${target_name} PRIVATE -fsanitize=address,undefined -fuse-ld=gold)
 endfunction()
-

example/example.cpp

@@ -22,7 +22,8 @@ void syslog_example();
 void custom_flags_example();
 
 #include "spdlog/spdlog.h"
-#include "spdlog/cfg/env.h" // support for loading levels from the environment variable
+#include "spdlog/cfg/env.h"  // support for loading levels from the environment variable
+#include "spdlog/fmt/ostr.h" // support for user defined types
 
 int main(int, char *[])
 {
@@ -129,7 +130,7 @@ void daily_example()
 #include "spdlog/cfg/env.h"
 void load_levels_example()
 {
-    // Set the log level to "info" and mylogger to to "trace":
+    // Set the log level to "info" and mylogger to "trace":
     // SPDLOG_LEVEL=info,mylogger=trace && ./example
     spdlog::cfg::load_env_levels();
     // or from command line:
@@ -221,7 +222,6 @@ void multi_sink_example()
 }
 
 // User defined types logging by implementing operator<<
-#include "spdlog/fmt/ostr.h" // must be included
 struct my_type
 {
     int i;
@@ -246,7 +246,7 @@ void err_handler_example()
 
 // syslog example (linux/osx/freebsd)
 #ifndef _WIN32
-#include "spdlog/sinks/syslog_sink.h"
+#    include "spdlog/sinks/syslog_sink.h"
 void syslog_example()
 {
     std::string ident = "spdlog-example";
@@ -257,7 +257,7 @@ void syslog_example()
 
 // Android example.
 #if defined(__ANDROID__)
-#include "spdlog/sinks/android_sink.h"
+#    include "spdlog/sinks/android_sink.h"
 void android_example()
 {
     std::string tag = "spdlog-android";

include/spdlog/async.h

@@ -46,7 +46,7 @@ struct async_factory_impl
         auto tp = registry_inst.get_tp();
         if (tp == nullptr)
         {
-            tp = std::make_shared<details::thread_pool>(details::default_async_q_size, 1);
+            tp = std::make_shared<details::thread_pool>(details::default_async_q_size, 1U);
             registry_inst.set_tp(tp);
         }
 

include/spdlog/async_logger-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/async_logger.h>
+#    include <spdlog/async_logger.h>
 #endif
 
 #include <spdlog/sinks/sink.h>

include/spdlog/async_logger.h

@@ -64,5 +64,5 @@ private:
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "async_logger-inl.h"
+#    include "async_logger-inl.h"
 #endif

include/spdlog/cfg/helpers-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/cfg/helpers.h>
+#    include <spdlog/cfg/helpers.h>
 #endif
 
 #include <spdlog/spdlog.h>

include/spdlog/cfg/helpers.h

@@ -25,5 +25,5 @@ SPDLOG_API void load_levels(const std::string &txt);
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "helpers-inl.h"
+#    include "helpers-inl.h"
 #endif // SPDLOG_HEADER_ONLY

include/spdlog/common-inl.h

@@ -4,13 +4,19 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/common.h>
+#    include <spdlog/common.h>
 #endif
 
+#include <algorithm>
+#include <iterator>
+
 namespace spdlog {
 namespace level {
 
-static string_view_t level_string_views[] SPDLOG_LEVEL_NAMES;
+#if __cplusplus >= 201703L
+constexpr
+#endif
+    static string_view_t level_string_views[] SPDLOG_LEVEL_NAMES;
 
 static const char *short_level_names[] SPDLOG_SHORT_LEVEL_NAMES;
 
@@ -19,11 +25,6 @@ SPDLOG_INLINE const string_view_t &to_string_view(spdlog::level::level_enum l) S
     return level_string_views[l];
 }
 
-SPDLOG_INLINE void set_string_view(spdlog::level::level_enum l, const string_view_t &s) SPDLOG_NOEXCEPT
-{
-    level_string_views[l] = s;
-}
-
 SPDLOG_INLINE const char *to_short_c_str(spdlog::level::level_enum l) SPDLOG_NOEXCEPT
 {
     return short_level_names[l];
@@ -31,15 +32,10 @@ SPDLOG_INLINE const char *to_short_c_str(spdlog::level::level_enum l) SPDLOG_NOE
 
 SPDLOG_INLINE spdlog::level::level_enum from_str(const std::string &name) SPDLOG_NOEXCEPT
 {
-    int level = 0;
+    auto it = std::find(std::begin(level_string_views), std::end(level_string_views), name);
-    for (const auto &level_str : level_string_views)
+    if (it != std::end(level_string_views))
-    {
+        return static_cast<level::level_enum>(std::distance(std::begin(level_string_views), it));
-        if (level_str == name)
+
-        {
-            return static_cast<level::level_enum>(level);
-        }
-        level++;
-    }
     // check also for "warn" and "err" before giving up..
     if (name == "warn")
     {
@@ -60,7 +56,7 @@ SPDLOG_INLINE spdlog_ex::spdlog_ex(std::string msg)
 SPDLOG_INLINE spdlog_ex::spdlog_ex(const std::string &msg, int last_errno)
 {
     memory_buf_t outbuf;
-    fmt::format_system_error(outbuf, last_errno, msg);
+    fmt::format_system_error(outbuf, last_errno, msg.c_str());
     msg_ = fmt::to_string(outbuf);
 }
 

include/spdlog/common.h

@@ -16,66 +16,77 @@
 #include <functional>
 
 #ifdef SPDLOG_COMPILED_LIB
-#undef SPDLOG_HEADER_ONLY
+#    undef SPDLOG_HEADER_ONLY
-#if defined(_WIN32) && defined(SPDLOG_SHARED_LIB)
+#    if defined(_WIN32) && defined(SPDLOG_SHARED_LIB)
-#ifdef spdlog_EXPORTS
+#        ifdef spdlog_EXPORTS
-#define SPDLOG_API __declspec(dllexport)
+#            define SPDLOG_API __declspec(dllexport)
-#else
+#        else
-#define SPDLOG_API __declspec(dllimport)
+#            define SPDLOG_API __declspec(dllimport)
-#endif
+#        endif
-#else // !defined(_WIN32) || !defined(SPDLOG_SHARED_LIB)
+#    else // !defined(_WIN32) || !defined(SPDLOG_SHARED_LIB)
-#define SPDLOG_API
+#        define SPDLOG_API
-#endif
+#    endif
-#define SPDLOG_INLINE
+#    define SPDLOG_INLINE
 #else // !defined(SPDLOG_COMPILED_LIB)
-#define SPDLOG_API
+#    define SPDLOG_API
-#define SPDLOG_HEADER_ONLY
+#    define SPDLOG_HEADER_ONLY
-#define SPDLOG_INLINE inline
+#    define SPDLOG_INLINE inline
 #endif // #ifdef SPDLOG_COMPILED_LIB
 
 #include <spdlog/fmt/fmt.h>
 
+// backward compatibility with fmt versions older than 8
+#if FMT_VERSION >= 80000
+#    define SPDLOG_FMT_RUNTIME(format_string) fmt::runtime(format_string)
+#    if defined(SPDLOG_WCHAR_FILENAMES) || defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT)
+#        include <spdlog/fmt/xchar.h>
+#    endif
+#else
+#    define SPDLOG_FMT_RUNTIME(format_string) format_string
+#endif
+
 // visual studio upto 2013 does not support noexcept nor constexpr
 #if defined(_MSC_VER) && (_MSC_VER < 1900)
-#define SPDLOG_NOEXCEPT _NOEXCEPT
+#    define SPDLOG_NOEXCEPT _NOEXCEPT
-#define SPDLOG_CONSTEXPR
+#    define SPDLOG_CONSTEXPR
 #else
-#define SPDLOG_NOEXCEPT noexcept
+#    define SPDLOG_NOEXCEPT noexcept
-#define SPDLOG_CONSTEXPR constexpr
+#    define SPDLOG_CONSTEXPR constexpr
 #endif
 
 #if defined(__GNUC__) || defined(__clang__)
-#define SPDLOG_DEPRECATED __attribute__((deprecated))
+#    define SPDLOG_DEPRECATED __attribute__((deprecated))
 #elif defined(_MSC_VER)
-#define SPDLOG_DEPRECATED __declspec(deprecated)
+#    define SPDLOG_DEPRECATED __declspec(deprecated)
 #else
-#define SPDLOG_DEPRECATED
+#    define SPDLOG_DEPRECATED
 #endif
 
 // disable thread local on msvc 2013
 #ifndef SPDLOG_NO_TLS
-#if (defined(_MSC_VER) && (_MSC_VER < 1900)) || defined(__cplusplus_winrt)
+#    if (defined(_MSC_VER) && (_MSC_VER < 1900)) || defined(__cplusplus_winrt)
-#define SPDLOG_NO_TLS 1
+#        define SPDLOG_NO_TLS 1
-#endif
+#    endif
 #endif
 
 #ifndef SPDLOG_FUNCTION
-#define SPDLOG_FUNCTION static_cast<const char *>(__FUNCTION__)
+#    define SPDLOG_FUNCTION static_cast<const char *>(__FUNCTION__)
 #endif
 
 #ifdef SPDLOG_NO_EXCEPTIONS
-#define SPDLOG_TRY
+#    define SPDLOG_TRY
-#define SPDLOG_THROW(ex)                                                                                                                   \
+#    define SPDLOG_THROW(ex)                                                                                                               \
-    do                                                                                                                                     \
+        do                                                                                                                                 \
-    {                                                                                                                                      \
+        {                                                                                                                                  \
-        printf("spdlog fatal error: %s\n", ex.what());                                                                                     \
+            printf("spdlog fatal error: %s\n", ex.what());                                                                                 \
-        std::abort();                                                                                                                      \
+            std::abort();                                                                                                                  \
-    } while (0)
+        } while (0)
-#define SPDLOG_CATCH_ALL()
+#    define SPDLOG_CATCH_STD
 #else
-#define SPDLOG_TRY try
+#    define SPDLOG_TRY try
-#define SPDLOG_THROW(ex) throw(ex)
+#    define SPDLOG_THROW(ex) throw(ex)
-#define SPDLOG_CATCH_ALL() catch (...)
+#    define SPDLOG_CATCH_STD                                                                                                               \
+        catch (const std::exception &) {}
 #endif
 
 namespace spdlog {
@@ -89,11 +100,11 @@ class sink;
 #if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
 using filename_t = std::wstring;
 // allow macro expansion to occur in SPDLOG_FILENAME_T
-#define SPDLOG_FILENAME_T_INNER(s) L##s
+#    define SPDLOG_FILENAME_T_INNER(s) L##s
-#define SPDLOG_FILENAME_T(s) SPDLOG_FILENAME_T_INNER(s)
+#    define SPDLOG_FILENAME_T(s) SPDLOG_FILENAME_T_INNER(s)
 #else
 using filename_t = std::string;
-#define SPDLOG_FILENAME_T(s) s
+#    define SPDLOG_FILENAME_T(s) s
 #endif
 
 using log_clock = std::chrono::system_clock;
@@ -106,19 +117,30 @@ using memory_buf_t = fmt::basic_memory_buffer<char, 250>;
 using wmemory_buf_t = fmt::basic_memory_buffer<wchar_t, 250>;
 
 #ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
-#ifndef _WIN32
+#    ifndef _WIN32
-#error SPDLOG_WCHAR_TO_UTF8_SUPPORT only supported on windows
+#        error SPDLOG_WCHAR_TO_UTF8_SUPPORT only supported on windows
-#else
+#    else
 template<typename T>
 struct is_convertible_to_wstring_view : std::is_convertible<T, wstring_view_t>
 {};
-#endif // _WIN32
+template<class T>
+struct is_convertible_to_wformat_string : std::is_convertible<T, fmt::wformat_string<>>
+{};
+#    endif // _WIN32
 #else
 template<typename>
 struct is_convertible_to_wstring_view : std::false_type
 {};
+template<class>
+struct is_convertible_to_wformat_string : std::false_type
+{};
 #endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
 
+template<class T>
+struct is_convertible_to_basic_format_string
+    : std::integral_constant<bool, std::is_convertible<const T &, fmt::format_string<>>::value || is_convertible_to_wformat_string<T>::value>
+{};
+
 #if defined(SPDLOG_NO_ATOMIC_LEVELS)
 using level_t = details::null_atomic_int;
 #else
@@ -134,7 +156,7 @@ using level_t = std::atomic<int>;
 #define SPDLOG_LEVEL_OFF 6
 
 #if !defined(SPDLOG_ACTIVE_LEVEL)
-#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_INFO
+#    define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_INFO
 #endif
 
 // Log level enum
@@ -151,23 +173,31 @@ enum level_enum
     n_levels
 };
 
+#define SPDLOG_LEVEL_NAME_TRACE string_view_t("trace", 5)
+#define SPDLOG_LEVEL_NAME_DEBUG string_view_t("debug", 5)
+#define SPDLOG_LEVEL_NAME_INFO string_view_t("info", 4)
+#define SPDLOG_LEVEL_NAME_WARNING string_view_t("warning", 7)
+#define SPDLOG_LEVEL_NAME_ERROR string_view_t("error", 5)
+#define SPDLOG_LEVEL_NAME_CRITICAL string_view_t("critical", 8)
+#define SPDLOG_LEVEL_NAME_OFF string_view_t("off", 3)
+
 #if !defined(SPDLOG_LEVEL_NAMES)
-#define SPDLOG_LEVEL_NAMES                                                                                                                 \
+#    define SPDLOG_LEVEL_NAMES                                                                                                             \
-    {                                                                                                                                      \
+        {                                                                                                                                  \
-        "trace", "debug", "info", "warning", "error", "critical", "off"                                                                    \
+            SPDLOG_LEVEL_NAME_TRACE, SPDLOG_LEVEL_NAME_DEBUG, SPDLOG_LEVEL_NAME_INFO, SPDLOG_LEVEL_NAME_WARNING, SPDLOG_LEVEL_NAME_ERROR,  \
-    }
+                SPDLOG_LEVEL_NAME_CRITICAL, SPDLOG_LEVEL_NAME_OFF                                                                          \
+        }
 #endif
 
 #if !defined(SPDLOG_SHORT_LEVEL_NAMES)
 
-#define SPDLOG_SHORT_LEVEL_NAMES                                                                                                           \
+#    define SPDLOG_SHORT_LEVEL_NAMES                                                                                                       \
-    {                                                                                                                                      \
+        {                                                                                                                                  \
-        "T", "D", "I", "W", "E", "C", "O"                                                                                                  \
+            "T", "D", "I", "W", "E", "C", "O"                                                                                              \
-    }
+        }
 #endif
 
 SPDLOG_API const string_view_t &to_string_view(spdlog::level::level_enum l) SPDLOG_NOEXCEPT;
-SPDLOG_API void set_string_view(spdlog::level::level_enum l, const string_view_t &s) SPDLOG_NOEXCEPT;
 SPDLOG_API const char *to_short_c_str(spdlog::level::level_enum l) SPDLOG_NOEXCEPT;
 SPDLOG_API spdlog::level::level_enum from_str(const std::string &name) SPDLOG_NOEXCEPT;
 
@@ -245,5 +275,5 @@ std::unique_ptr<T> make_unique(Args &&...args)
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "common-inl.h"
+#    include "common-inl.h"
 #endif

include/spdlog/details/backtracer-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/details/backtracer.h>
+#    include <spdlog/details/backtracer.h>
 #endif
 namespace spdlog {
 namespace details {

include/spdlog/details/backtracer.h

@@ -41,5 +41,5 @@ public:
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "backtracer-inl.h"
+#    include "backtracer-inl.h"
-#endif
+#endif

include/spdlog/details/file_helper-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/details/file_helper.h>
+#    include <spdlog/details/file_helper.h>
 #endif
 
 #include <spdlog/details/os.h>

include/spdlog/details/file_helper.h

@@ -47,7 +47,7 @@ public:
 
 private:
     const int open_tries_ = 5;
-    const int open_interval_ = 10;
+    const unsigned int open_interval_ = 10;
     std::FILE *fd_{nullptr};
     filename_t filename_;
 };
@@ -55,5 +55,5 @@ private:
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "file_helper-inl.h"
+#    include "file_helper-inl.h"
 #endif

include/spdlog/details/fmt_helper.h

@@ -4,6 +4,7 @@
 
 #include <chrono>
 #include <type_traits>
+#include <iterator>
 #include <spdlog/fmt/fmt.h>
 #include <spdlog/common.h>
 
@@ -54,7 +55,7 @@ inline void pad2(int n, memory_buf_t &dest)
     }
     else // unlikely, but just in case, let fmt deal with it
     {
-        fmt::format_to(dest, "{:02}", n);
+        fmt::format_to(std::back_inserter(dest), SPDLOG_FMT_RUNTIME("{:02}"), n);
     }
 }
 

include/spdlog/details/log_msg-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/details/log_msg.h>
+#    include <spdlog/details/log_msg.h>
 #endif
 
 #include <spdlog/details/os.h>

include/spdlog/details/log_msg.h

@@ -15,6 +15,7 @@ struct SPDLOG_API log_msg
     log_msg(source_loc loc, string_view_t logger_name, level::level_enum lvl, string_view_t msg);
     log_msg(string_view_t logger_name, level::level_enum lvl, string_view_t msg);
     log_msg(const log_msg &other) = default;
+    log_msg &operator=(const log_msg &other) = default;
 
     string_view_t logger_name;
     level::level_enum level{level::off};
@@ -32,5 +33,5 @@ struct SPDLOG_API log_msg
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "log_msg-inl.h"
+#    include "log_msg-inl.h"
 #endif

include/spdlog/details/log_msg_buffer-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/details/log_msg_buffer.h>
+#    include <spdlog/details/log_msg_buffer.h>
 #endif
 
 namespace spdlog {
@@ -26,9 +26,7 @@ SPDLOG_INLINE log_msg_buffer::log_msg_buffer(const log_msg_buffer &other)
     update_string_views();
 }
 
-SPDLOG_INLINE log_msg_buffer::log_msg_buffer(log_msg_buffer &&other) SPDLOG_NOEXCEPT 
+SPDLOG_INLINE log_msg_buffer::log_msg_buffer(log_msg_buffer &&other) SPDLOG_NOEXCEPT : log_msg{other}, buffer{std::move(other.buffer)}
-    : log_msg{other}
-    , buffer{std::move(other.buffer)}
 {
     update_string_views();
 }

include/spdlog/details/log_msg_buffer.h

@@ -29,5 +29,5 @@ public:
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "log_msg_buffer-inl.h"
+#    include "log_msg_buffer-inl.h"
 #endif

include/spdlog/details/os-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/details/os.h>
+#    include <spdlog/details/os.h>
 #endif
 
 #include <spdlog/common.h>
@@ -23,45 +23,45 @@
 
 #ifdef _WIN32
 
-#include <io.h>      // _get_osfhandle and _isatty support
+#    include <io.h>      // _get_osfhandle and _isatty support
-#include <process.h> //  _get_pid support
+#    include <process.h> //  _get_pid support
-#include <spdlog/details/windows_include.h>
+#    include <spdlog/details/windows_include.h>
 
-#ifdef __MINGW32__
+#    ifdef __MINGW32__
-#include <share.h>
+#        include <share.h>
-#endif
+#    endif
 
-#if defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)
+#    if defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT) || defined(SPDLOG_WCHAR_FILENAMES)
-#include <limits>
+#        include <limits>
-#endif
+#    endif
 
-#include <direct.h> // for _mkdir/_wmkdir
+#    include <direct.h> // for _mkdir/_wmkdir
 
 #else // unix
 
-#include <fcntl.h>
+#    include <fcntl.h>
-#include <unistd.h>
+#    include <unistd.h>
 
-#ifdef __linux__
+#    ifdef __linux__
-#include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
+#        include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
 
-#elif defined(_AIX)
+#    elif defined(_AIX)
-#include <pthread.h> // for pthread_getthreadid_np
+#        include <pthread.h> // for pthread_getthreadid_np
 
-#elif defined(__DragonFly__) || defined(__FreeBSD__)
+#    elif defined(__DragonFly__) || defined(__FreeBSD__)
-#include <pthread_np.h> // for pthread_getthreadid_np
+#        include <pthread_np.h> // for pthread_getthreadid_np
 
-#elif defined(__NetBSD__)
+#    elif defined(__NetBSD__)
-#include <lwp.h> // for _lwp_self
+#        include <lwp.h> // for _lwp_self
 
-#elif defined(__sun)
+#    elif defined(__sun)
-#include <thread.h> // for thr_self
+#        include <thread.h> // for thr_self
-#endif
+#    endif
 
 #endif // unix
 
-#ifndef __has_feature      // Clang - feature checking macros.
+#ifndef __has_feature          // Clang - feature checking macros.
-#define __has_feature(x) 0 // Compatibility with non-clang compilers.
+#    define __has_feature(x) 0 // Compatibility with non-clang compilers.
 #endif
 
 namespace spdlog {
@@ -123,12 +123,12 @@ SPDLOG_INLINE std::tm gmtime() SPDLOG_NOEXCEPT
 SPDLOG_INLINE bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode)
 {
 #ifdef _WIN32
-#ifdef SPDLOG_WCHAR_FILENAMES
+#    ifdef SPDLOG_WCHAR_FILENAMES
     *fp = ::_wfsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
-#else
+#    else
     *fp = ::_fsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
-#endif
+#    endif
-#if defined(SPDLOG_PREVENT_CHILD_FD)
+#    if defined(SPDLOG_PREVENT_CHILD_FD)
     if (*fp != nullptr)
     {
         auto file_handle = reinterpret_cast<HANDLE>(_get_osfhandle(::_fileno(*fp)));
@@ -138,9 +138,9 @@ SPDLOG_INLINE bool fopen_s(FILE **fp, const filename_t &filename, const filename
             *fp = nullptr;
         }
     }
-#endif
+#    endif
 #else // unix
-#if defined(SPDLOG_PREVENT_CHILD_FD)
+#    if defined(SPDLOG_PREVENT_CHILD_FD)
     const int mode_flag = mode == SPDLOG_FILENAME_T("ab") ? O_APPEND : O_TRUNC;
     const int fd = ::open((filename.c_str()), O_CREAT | O_WRONLY | O_CLOEXEC | mode_flag, mode_t(0644));
     if (fd == -1)
@@ -152,9 +152,9 @@ SPDLOG_INLINE bool fopen_s(FILE **fp, const filename_t &filename, const filename
     {
         ::close(fd);
     }
-#else
+#    else
     *fp = ::fopen((filename.c_str()), mode.c_str());
-#endif
+#    endif
 #endif
 
     return *fp == nullptr;
@@ -187,11 +187,11 @@ SPDLOG_INLINE int rename(const filename_t &filename1, const filename_t &filename
 SPDLOG_INLINE bool path_exists(const filename_t &filename) SPDLOG_NOEXCEPT
 {
 #ifdef _WIN32
-#ifdef SPDLOG_WCHAR_FILENAMES
+#    ifdef SPDLOG_WCHAR_FILENAMES
     auto attribs = ::GetFileAttributesW(filename.c_str());
-#else
+#    else
     auto attribs = ::GetFileAttributesA(filename.c_str());
-#endif
+#    endif
     return attribs != INVALID_FILE_ATTRIBUTES;
 #else // common linux/unix all have the stat system call
     struct stat buffer;
@@ -199,6 +199,12 @@ SPDLOG_INLINE bool path_exists(const filename_t &filename) SPDLOG_NOEXCEPT
 #endif
 }
 
+#ifdef _MSC_VER
+// avoid warning about unreachable statement at the end of filesize()
+#    pragma warning(push)
+#    pragma warning(disable : 4702)
+#endif
+
 // Return file size according to open FILE* object
 SPDLOG_INLINE size_t filesize(FILE *f)
 {
@@ -208,59 +214,63 @@ SPDLOG_INLINE size_t filesize(FILE *f)
     }
 #if defined(_WIN32) && !defined(__CYGWIN__)
     int fd = ::_fileno(f);
-#if _WIN64 // 64 bits
+#    if defined(_WIN64) // 64 bits
     __int64 ret = ::_filelengthi64(fd);
     if (ret >= 0)
     {
         return static_cast<size_t>(ret);
     }
 
-#else // windows 32 bits
+#    else // windows 32 bits
     long ret = ::_filelength(fd);
     if (ret >= 0)
     {
         return static_cast<size_t>(ret);
     }
-#endif
+#    endif
 
 #else // unix
 // OpenBSD doesn't compile with :: before the fileno(..)
-#if defined(__OpenBSD__)
+#    if defined(__OpenBSD__)
     int fd = fileno(f);
-#else
+#    else
     int fd = ::fileno(f);
-#endif
+#    endif
 // 64 bits(but not in osx or cygwin, where fstat64 is deprecated)
-#if (defined(__linux__) || defined(__sun) || defined(_AIX)) && (defined(__LP64__) || defined(_LP64))
+#    if (defined(__linux__) || defined(__sun) || defined(_AIX)) && (defined(__LP64__) || defined(_LP64))
     struct stat64 st;
     if (::fstat64(fd, &st) == 0)
     {
         return static_cast<size_t>(st.st_size);
     }
-#else // other unix or linux 32 bits or cygwin
+#    else // other unix or linux 32 bits or cygwin
     struct stat st;
     if (::fstat(fd, &st) == 0)
     {
         return static_cast<size_t>(st.st_size);
     }
-#endif
+#    endif
 #endif
     throw_spdlog_ex("Failed getting file size from fd", errno);
     return 0; // will not be reached.
 }
 
+#ifdef _MSC_VER
+#    pragma warning(pop)
+#endif
+
 // Return utc offset in minutes or throw spdlog_ex on failure
 SPDLOG_INLINE int utc_minutes_offset(const std::tm &tm)
 {
 
 #ifdef _WIN32
-#if _WIN32_WINNT < _WIN32_WINNT_WS08
+#    if _WIN32_WINNT < _WIN32_WINNT_WS08
     TIME_ZONE_INFORMATION tzinfo;
     auto rv = ::GetTimeZoneInformation(&tzinfo);
-#else
+#    else
     DYNAMIC_TIME_ZONE_INFORMATION tzinfo;
     auto rv = ::GetDynamicTimeZoneInformation(&tzinfo);
-#endif
+#    endif
     if (rv == TIME_ZONE_ID_INVALID)
         throw_spdlog_ex("Failed getting timezone info. ", errno);
 
@@ -276,7 +286,7 @@ SPDLOG_INLINE int utc_minutes_offset(const std::tm &tm)
     return offset;
 #else
 
-#if defined(sun) || defined(__sun) || defined(_AIX) || (!defined(_BSD_SOURCE) && !defined(_GNU_SOURCE))
+#    if defined(sun) || defined(__sun) || defined(_AIX) || (!defined(_BSD_SOURCE) && !defined(_GNU_SOURCE))
     // 'tm_gmtoff' field is BSD extension and it's missing on SunOS/Solaris
     struct helper
     {
@@ -306,9 +316,9 @@ SPDLOG_INLINE int utc_minutes_offset(const std::tm &tm)
     };
 
     auto offset_seconds = helper::calculate_gmt_offset(tm);
-#else
+#    else
     auto offset_seconds = tm.tm_gmtoff;
-#endif
+#    endif
 
     return static_cast<int>(offset_seconds / 60);
 #endif
@@ -322,9 +332,9 @@ SPDLOG_INLINE size_t _thread_id() SPDLOG_NOEXCEPT
 #ifdef _WIN32
     return static_cast<size_t>(::GetCurrentThreadId());
 #elif defined(__linux__)
-#if defined(__ANDROID__) && defined(__ANDROID_API__) && (__ANDROID_API__ < 21)
+#    if defined(__ANDROID__) && defined(__ANDROID_API__) && (__ANDROID_API__ < 21)
-#define SYS_gettid __NR_gettid
+#        define SYS_gettid __NR_gettid
-#endif
+#    endif
     return static_cast<size_t>(::syscall(SYS_gettid));
 #elif defined(_AIX) || defined(__DragonFly__) || defined(__FreeBSD__)
     return static_cast<size_t>(::pthread_getthreadid_np());
@@ -356,7 +366,7 @@ SPDLOG_INLINE size_t thread_id() SPDLOG_NOEXCEPT
 
 // This is avoid msvc issue in sleep_for that happens if the clock changes.
 // See https://github.com/gabime/spdlog/issues/609
-SPDLOG_INLINE void sleep_for_millis(int milliseconds) SPDLOG_NOEXCEPT
+SPDLOG_INLINE void sleep_for_millis(unsigned int milliseconds) SPDLOG_NOEXCEPT
 {
 #if defined(_WIN32)
     ::Sleep(milliseconds);
@@ -405,8 +415,8 @@ SPDLOG_INLINE bool is_color_terminal() SPDLOG_NOEXCEPT
             return true;
         }
 
-        static constexpr std::array<const char *, 15> terms = {{"ansi", "color", "console", "cygwin", "gnome", "konsole", "kterm", "linux",
+        static constexpr std::array<const char *, 16> terms = {{"ansi", "color", "console", "cygwin", "gnome", "konsole", "kterm", "linux",
-            "msys", "putty", "rxvt", "screen", "vt100", "xterm", "alacritty"}};
+            "msys", "putty", "rxvt", "screen", "vt100", "xterm", "alacritty", "vt102"}};
 
         const char *env_term_p = std::getenv("TERM");
         if (env_term_p == nullptr)
@@ -509,11 +519,11 @@ SPDLOG_INLINE void utf8_to_wstrbuf(string_view_t str, wmemory_buf_t &target)
 static SPDLOG_INLINE bool mkdir_(const filename_t &path)
 {
 #ifdef _WIN32
-#ifdef SPDLOG_WCHAR_FILENAMES
+#    ifdef SPDLOG_WCHAR_FILENAMES
     return ::_wmkdir(path.c_str()) == 0;
-#else
+#    else
     return ::_mkdir(path.c_str()) == 0;
-#endif
+#    endif
 #else
     return ::mkdir(path.c_str(), mode_t(0755)) == 0;
 #endif
@@ -570,14 +580,14 @@ std::string SPDLOG_INLINE getenv(const char *field)
 {
 
 #if defined(_MSC_VER)
-#if defined(__cplusplus_winrt)
+#    if defined(__cplusplus_winrt)
     return std::string{}; // not supported under uwp
-#else
+#    else
     size_t len = 0;
     char buf[128];
     bool ok = ::getenv_s(&len, buf, sizeof(buf), field) == 0;
     return ok ? buf : std::string{};
-#endif
+#    endif
 #else // revert to getenv
     char *buf = ::getenv(field);
     return buf ? buf : std::string{};

include/spdlog/details/os.h

@@ -22,22 +22,22 @@ SPDLOG_API std::tm gmtime() SPDLOG_NOEXCEPT;
 
 // eol definition
 #if !defined(SPDLOG_EOL)
-#ifdef _WIN32
+#    ifdef _WIN32
-#define SPDLOG_EOL "\r\n"
+#        define SPDLOG_EOL "\r\n"
-#else
+#    else
-#define SPDLOG_EOL "\n"
+#        define SPDLOG_EOL "\n"
-#endif
+#    endif
 #endif
 
 SPDLOG_CONSTEXPR static const char *default_eol = SPDLOG_EOL;
 
 // folder separator
 #if !defined(SPDLOG_FOLDER_SEPS)
-#ifdef _WIN32
+#    ifdef _WIN32
-#define SPDLOG_FOLDER_SEPS "\\/"
+#        define SPDLOG_FOLDER_SEPS "\\/"
-#else
+#    else
-#define SPDLOG_FOLDER_SEPS "/"
+#        define SPDLOG_FOLDER_SEPS "/"
-#endif
+#    endif
 #endif
 
 SPDLOG_CONSTEXPR static const char folder_seps[] = SPDLOG_FOLDER_SEPS;
@@ -74,7 +74,7 @@ SPDLOG_API size_t thread_id() SPDLOG_NOEXCEPT;
 
 // This is avoid msvc issue in sleep_for that happens if the clock changes.
 // See https://github.com/gabime/spdlog/issues/609
-SPDLOG_API void sleep_for_millis(int milliseconds) SPDLOG_NOEXCEPT;
+SPDLOG_API void sleep_for_millis(unsigned int milliseconds) SPDLOG_NOEXCEPT;
 
 SPDLOG_API std::string filename_to_str(const filename_t &filename);
 
@@ -114,5 +114,5 @@ SPDLOG_API std::string getenv(const char *field);
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "os-inl.h"
+#    include "os-inl.h"
 #endif

include/spdlog/details/periodic_worker-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/details/periodic_worker.h>
+#    include <spdlog/details/periodic_worker.h>
 #endif
 
 namespace spdlog {

include/spdlog/details/periodic_worker.h

@@ -36,5 +36,5 @@ private:
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "periodic_worker-inl.h"
+#    include "periodic_worker-inl.h"
 #endif

include/spdlog/details/registry-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/details/registry.h>
+#    include <spdlog/details/registry.h>
 #endif
 
 #include <spdlog/common.h>
@@ -14,11 +14,11 @@
 
 #ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
 // support for the default stdout color logger
-#ifdef _WIN32
+#    ifdef _WIN32
-#include <spdlog/sinks/wincolor_sink.h>
+#        include <spdlog/sinks/wincolor_sink.h>
-#else
+#    else
-#include <spdlog/sinks/ansicolor_sink.h>
+#        include <spdlog/sinks/ansicolor_sink.h>
-#endif
+#    endif
 #endif // SPDLOG_DISABLE_DEFAULT_LOGGER
 
 #include <chrono>
@@ -36,11 +36,11 @@ SPDLOG_INLINE registry::registry()
 
 #ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
     // create default logger (ansicolor_stdout_sink_mt or wincolor_stdout_sink_mt in windows).
-#ifdef _WIN32
+#    ifdef _WIN32
     auto color_sink = std::make_shared<sinks::wincolor_stdout_sink_mt>();
-#else
+#    else
     auto color_sink = std::make_shared<sinks::ansicolor_stdout_sink_mt>();
-#endif
+#    endif
 
     const char *default_logger_name = "";
     default_logger_ = std::make_shared<spdlog::logger>(default_logger_name, std::move(color_sink));
@@ -195,14 +195,14 @@ SPDLOG_INLINE void registry::flush_every(std::chrono::seconds interval)
     periodic_flusher_ = details::make_unique<periodic_worker>(clbk, interval);
 }
 
-SPDLOG_INLINE void registry::set_error_handler(void (*handler)(const std::string &msg))
+SPDLOG_INLINE void registry::set_error_handler(err_handler handler)
 {
     std::lock_guard<std::mutex> lock(logger_map_mutex_);
     for (auto &l : loggers_)
     {
         l.second->set_error_handler(handler);
     }
-    err_handler_ = handler;
+    err_handler_ = std::move(handler);
 }
 
 SPDLOG_INLINE void registry::apply_all(const std::function<void(const std::shared_ptr<logger>)> &fun)

include/spdlog/details/registry.h

@@ -63,7 +63,7 @@ public:
 
     void flush_every(std::chrono::seconds interval);
 
-    void set_error_handler(void (*handler)(const std::string &msg));
+    void set_error_handler(err_handler handler);
 
     void apply_all(const std::function<void(const std::shared_ptr<logger>)> &fun);
 
@@ -99,7 +99,7 @@ private:
     std::unique_ptr<formatter> formatter_;
     spdlog::level::level_enum global_log_level_ = level::info;
     level::level_enum flush_level_ = level::off;
-    void (*err_handler_)(const std::string &msg) = nullptr;
+    err_handler err_handler_;
     std::shared_ptr<thread_pool> tp_;
     std::unique_ptr<periodic_worker> periodic_flusher_;
     std::shared_ptr<logger> default_logger_;
@@ -111,5 +111,5 @@ private:
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "registry-inl.h"
+#    include "registry-inl.h"
 #endif

include/spdlog/details/synchronous_factory.h

@@ -21,4 +21,4 @@ struct synchronous_factory
         return new_logger;
     }
 };
-} // namespace spdlog
+} // namespace spdlog

include/spdlog/details/tcp_client-windows.h

@@ -144,7 +144,7 @@ public:
 
         // set TCP_NODELAY
         int enable_flag = 1;
-        ::setsockopt(socket_, IPPROTO_TCP, TCP_NODELAY, (char *)&enable_flag, sizeof(enable_flag));
+        ::setsockopt(socket_, IPPROTO_TCP, TCP_NODELAY, reinterpret_cast<char *>(&enable_flag), sizeof(enable_flag));
     }
 
     // Send exactly n_bytes of the given data.

include/spdlog/details/tcp_client.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifdef _WIN32
-#error include tcp_client-windows.h instead
+#    error include tcp_client-windows.h instead
 #endif
 
 // tcp client helper
@@ -103,15 +103,15 @@ public:
 
         // set TCP_NODELAY
         int enable_flag = 1;
-        ::setsockopt(socket_, IPPROTO_TCP, TCP_NODELAY, (char *)&enable_flag, sizeof(enable_flag));
+        ::setsockopt(socket_, IPPROTO_TCP, TCP_NODELAY, reinterpret_cast<char *>(&enable_flag), sizeof(enable_flag));
 
         // prevent sigpipe on systems where MSG_NOSIGNAL is not available
 #if defined(SO_NOSIGPIPE) && !defined(MSG_NOSIGNAL)
-        ::setsockopt(socket_, SOL_SOCKET, SO_NOSIGPIPE, (char *)&enable_flag, sizeof(enable_flag));
+        ::setsockopt(socket_, SOL_SOCKET, SO_NOSIGPIPE, reinterpret_cast<char *>(&enable_flag), sizeof(enable_flag));
 #endif
 
 #if !defined(SO_NOSIGPIPE) && !defined(MSG_NOSIGNAL)
-#error "tcp_sink would raise SIGPIPE since niether SO_NOSIGPIPE nor MSG_NOSIGNAL are available"
+#    error "tcp_sink would raise SIGPIPE since niether SO_NOSIGPIPE nor MSG_NOSIGNAL are available"
 #endif
     }
 

include/spdlog/details/thread_pool-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/details/thread_pool.h>
+#    include <spdlog/details/thread_pool.h>
 #endif
 
 #include <spdlog/common.h>
@@ -49,7 +49,7 @@ SPDLOG_INLINE thread_pool::~thread_pool()
             t.join();
         }
     }
-    SPDLOG_CATCH_ALL() {}
+    SPDLOG_CATCH_STD
 }
 
 void SPDLOG_INLINE thread_pool::post_log(async_logger_ptr &&worker_ptr, const details::log_msg &msg, async_overflow_policy overflow_policy)

include/spdlog/details/thread_pool.h

@@ -117,5 +117,5 @@ private:
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "thread_pool-inl.h"
+#    include "thread_pool-inl.h"
 #endif

include/spdlog/details/windows_include.h

@@ -1,11 +1,11 @@
 #pragma once
 
 #ifndef NOMINMAX
-#define NOMINMAX // prevent windows redefining min/max
+#    define NOMINMAX // prevent windows redefining min/max
 #endif
 
 #ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
+#    define WIN32_LEAN_AND_MEAN
 #endif
 
 #include <windows.h>

include/spdlog/fmt/bin_to_hex.h

@@ -89,7 +89,7 @@ struct formatter<spdlog::details::dump_info<T>>
 
     // parse the format string flags
     template<typename ParseContext>
-    auto parse(ParseContext &ctx) -> decltype(ctx.begin())
+    FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin())
     {
         auto it = ctx.begin();
         while (it != ctx.end() && *it != '}')
@@ -209,7 +209,7 @@ struct formatter<spdlog::details::dump_info<T>>
 
         if (put_positions)
         {
-            fmt::format_to(inserter, "{:<04X}: ", pos);
+            fmt::format_to(inserter, "{:04X}: ", pos);
         }
     }
 };

include/spdlog/fmt/bundled/LICENSE.rst

@@ -1,27 +0,0 @@
-Copyright (c) 2012 - present, Victor Zverovich
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
---- Optional exception to the license ---
-
-As an exception, if, as a result of your compiling your source code, portions
-of this Software are embedded into a machine-executable object form of such
-source code, you may redistribute such embedded portions in such object form
-without including the above copyright and permission notices.

include/spdlog/fmt/bundled/args.h

@@ -0,0 +1,232 @@
+// Formatting library for C++ - dynamic format arguments
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_ARGS_H_
+#define FMT_ARGS_H_
+
+#include <functional>  // std::reference_wrapper
+#include <memory>      // std::unique_ptr
+#include <vector>
+
+#include "core.h"
+
+FMT_BEGIN_NAMESPACE
+
+namespace detail {
+
+template <typename T> struct is_reference_wrapper : std::false_type {};
+template <typename T>
+struct is_reference_wrapper<std::reference_wrapper<T>> : std::true_type {};
+
+template <typename T> const T& unwrap(const T& v) { return v; }
+template <typename T> const T& unwrap(const std::reference_wrapper<T>& v) {
+  return static_cast<const T&>(v);
+}
+
+class dynamic_arg_list {
+  // Workaround for clang's -Wweak-vtables. Unlike for regular classes, for
+  // templates it doesn't complain about inability to deduce single translation
+  // unit for placing vtable. So storage_node_base is made a fake template.
+  template <typename = void> struct node {
+    virtual ~node() = default;
+    std::unique_ptr<node<>> next;
+  };
+
+  template <typename T> struct typed_node : node<> {
+    T value;
+
+    template <typename Arg>
+    FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {}
+
+    template <typename Char>
+    FMT_CONSTEXPR typed_node(const basic_string_view<Char>& arg)
+        : value(arg.data(), arg.size()) {}
+  };
+
+  std::unique_ptr<node<>> head_;
+
+ public:
+  template <typename T, typename Arg> const T& push(const Arg& arg) {
+    auto new_node = std::unique_ptr<typed_node<T>>(new typed_node<T>(arg));
+    auto& value = new_node->value;
+    new_node->next = std::move(head_);
+    head_ = std::move(new_node);
+    return value;
+  }
+};
+}  // namespace detail
+
+/**
+  \rst
+  A dynamic version of `fmt::format_arg_store`.
+  It's equipped with a storage to potentially temporary objects which lifetimes
+  could be shorter than the format arguments object.
+
+  It can be implicitly converted into `~fmt::basic_format_args` for passing
+  into type-erased formatting functions such as `~fmt::vformat`.
+  \endrst
+ */
+template <typename Context>
+class dynamic_format_arg_store
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+    // Workaround a GCC template argument substitution bug.
+    : public basic_format_args<Context>
+#endif
+{
+ private:
+  using char_type = typename Context::char_type;
+
+  template <typename T> struct need_copy {
+    static constexpr detail::type mapped_type =
+        detail::mapped_type_constant<T, Context>::value;
+
+    enum {
+      value = !(detail::is_reference_wrapper<T>::value ||
+                std::is_same<T, basic_string_view<char_type>>::value ||
+                std::is_same<T, detail::std_string_view<char_type>>::value ||
+                (mapped_type != detail::type::cstring_type &&
+                 mapped_type != detail::type::string_type &&
+                 mapped_type != detail::type::custom_type))
+    };
+  };
+
+  template <typename T>
+  using stored_type = conditional_t<detail::is_string<T>::value &&
+                                        !has_formatter<T, Context>::value &&
+                                        !detail::is_reference_wrapper<T>::value,
+                                    std::basic_string<char_type>, T>;
+
+  // Storage of basic_format_arg must be contiguous.
+  std::vector<basic_format_arg<Context>> data_;
+  std::vector<detail::named_arg_info<char_type>> named_info_;
+
+  // Storage of arguments not fitting into basic_format_arg must grow
+  // without relocation because items in data_ refer to it.
+  detail::dynamic_arg_list dynamic_args_;
+
+  friend class basic_format_args<Context>;
+
+  unsigned long long get_types() const {
+    return detail::is_unpacked_bit | data_.size() |
+           (named_info_.empty()
+                ? 0ULL
+                : static_cast<unsigned long long>(detail::has_named_args_bit));
+  }
+
+  const basic_format_arg<Context>* data() const {
+    return named_info_.empty() ? data_.data() : data_.data() + 1;
+  }
+
+  template <typename T> void emplace_arg(const T& arg) {
+    data_.emplace_back(detail::make_arg<Context>(arg));
+  }
+
+  template <typename T>
+  void emplace_arg(const detail::named_arg<char_type, T>& arg) {
+    if (named_info_.empty()) {
+      constexpr const detail::named_arg_info<char_type>* zero_ptr{nullptr};
+      data_.insert(data_.begin(), {zero_ptr, 0});
+    }
+    data_.emplace_back(detail::make_arg<Context>(detail::unwrap(arg.value)));
+    auto pop_one = [](std::vector<basic_format_arg<Context>>* data) {
+      data->pop_back();
+    };
+    std::unique_ptr<std::vector<basic_format_arg<Context>>, decltype(pop_one)>
+        guard{&data_, pop_one};
+    named_info_.push_back({arg.name, static_cast<int>(data_.size() - 2u)});
+    data_[0].value_.named_args = {named_info_.data(), named_info_.size()};
+    guard.release();
+  }
+
+ public:
+  /**
+    \rst
+    Adds an argument into the dynamic store for later passing to a formatting
+    function.
+
+    Note that custom types and string types (but not string views) are copied
+    into the store dynamically allocating memory if necessary.
+
+    **Example**::
+
+      fmt::dynamic_format_arg_store<fmt::format_context> store;
+      store.push_back(42);
+      store.push_back("abc");
+      store.push_back(1.5f);
+      std::string result = fmt::vformat("{} and {} and {}", store);
+    \endrst
+  */
+  template <typename T> void push_back(const T& arg) {
+    if (detail::const_check(need_copy<T>::value))
+      emplace_arg(dynamic_args_.push<stored_type<T>>(arg));
+    else
+      emplace_arg(detail::unwrap(arg));
+  }
+
+  /**
+    \rst
+    Adds a reference to the argument into the dynamic store for later passing to
+    a formatting function.
+
+    **Example**::
+
+      fmt::dynamic_format_arg_store<fmt::format_context> store;
+      char band[] = "Rolling Stones";
+      store.push_back(std::cref(band));
+      band[9] = 'c'; // Changing str affects the output.
+      std::string result = fmt::vformat("{}", store);
+      // result == "Rolling Scones"
+    \endrst
+  */
+  template <typename T> void push_back(std::reference_wrapper<T> arg) {
+    static_assert(
+        need_copy<T>::value,
+        "objects of built-in types and string views are always copied");
+    emplace_arg(arg.get());
+  }
+
+  /**
+    Adds named argument into the dynamic store for later passing to a formatting
+    function. ``std::reference_wrapper`` is supported to avoid copying of the
+    argument. The name is always copied into the store.
+  */
+  template <typename T>
+  void push_back(const detail::named_arg<char_type, T>& arg) {
+    const char_type* arg_name =
+        dynamic_args_.push<std::basic_string<char_type>>(arg.name).c_str();
+    if (detail::const_check(need_copy<T>::value)) {
+      emplace_arg(
+          fmt::arg(arg_name, dynamic_args_.push<stored_type<T>>(arg.value)));
+    } else {
+      emplace_arg(fmt::arg(arg_name, arg.value));
+    }
+  }
+
+  /** Erase all elements from the store */
+  void clear() {
+    data_.clear();
+    named_info_.clear();
+    dynamic_args_ = detail::dynamic_arg_list();
+  }
+
+  /**
+    \rst
+    Reserves space to store at least *new_cap* arguments including
+    *new_cap_named* named arguments.
+    \endrst
+  */
+  void reserve(size_t new_cap, size_t new_cap_named) {
+    FMT_ASSERT(new_cap >= new_cap_named,
+               "Set of arguments includes set of named arguments");
+    data_.reserve(new_cap);
+    named_info_.reserve(new_cap_named);
+  }
+};
+
+FMT_END_NAMESPACE
+
+#endif  // FMT_ARGS_H_

include/spdlog/fmt/bundled/chrono.h

@@ -8,13 +8,13 @@
 #ifndef FMT_CHRONO_H_
 #define FMT_CHRONO_H_
 
+#include <algorithm>
 #include <chrono>
 #include <ctime>
 #include <locale>
 #include <sstream>
 
 #include "format.h"
-#include "locale.h"
 
 FMT_BEGIN_NAMESPACE
 
@@ -282,13 +282,89 @@ To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
 #define FMT_NOMACRO
 
 namespace detail {
+template <typename T = void> struct null {};
 inline null<> localtime_r FMT_NOMACRO(...) { return null<>(); }
 inline null<> localtime_s(...) { return null<>(); }
 inline null<> gmtime_r(...) { return null<>(); }
 inline null<> gmtime_s(...) { return null<>(); }
+
+inline auto do_write(const std::tm& time, const std::locale& loc, char format,
+                     char modifier) -> std::string {
+  auto&& os = std::ostringstream();
+  os.imbue(loc);
+  using iterator = std::ostreambuf_iterator<char>;
+  const auto& facet = std::use_facet<std::time_put<char, iterator>>(loc);
+  auto end = facet.put(os, os, ' ', &time, format, modifier);
+  if (end.failed()) FMT_THROW(format_error("failed to format time"));
+  auto str = os.str();
+  if (!detail::is_utf8() || loc == std::locale::classic()) return str;
+    // char16_t and char32_t codecvts are broken in MSVC (linkage errors) and
+    // gcc-4.
+#if FMT_MSC_VER != 0 || \
+    (defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_DUAL_ABI))
+  // The _GLIBCXX_USE_DUAL_ABI macro is always defined in libstdc++ from gcc-5
+  // and newer.
+  using code_unit = wchar_t;
+#else
+  using code_unit = char32_t;
+#endif
+  auto& f = std::use_facet<std::codecvt<code_unit, char, std::mbstate_t>>(loc);
+  auto mb = std::mbstate_t();
+  const char* from_next = nullptr;
+  code_unit* to_next = nullptr;
+  constexpr size_t buf_size = 32;
+  code_unit buf[buf_size] = {};
+  auto result = f.in(mb, str.data(), str.data() + str.size(), from_next, buf,
+                     buf + buf_size, to_next);
+  if (result != std::codecvt_base::ok)
+    FMT_THROW(format_error("failed to format time"));
+  str.clear();
+  for (code_unit* p = buf; p != to_next; ++p) {
+    uint32_t c = static_cast<uint32_t>(*p);
+    if (sizeof(code_unit) == 2 && c >= 0xd800 && c <= 0xdfff) {
+      // surrogate pair
+      ++p;
+      if (p == to_next || (c & 0xfc00) != 0xd800 || (*p & 0xfc00) != 0xdc00) {
+        FMT_THROW(format_error("failed to format time"));
+      }
+      c = (c << 10) + static_cast<uint32_t>(*p) - 0x35fdc00;
+    }
+    if (c < 0x80) {
+      str.push_back(static_cast<char>(c));
+    } else if (c < 0x800) {
+      str.push_back(static_cast<char>(0xc0 | (c >> 6)));
+      str.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+    } else if ((c >= 0x800 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xffff)) {
+      str.push_back(static_cast<char>(0xe0 | (c >> 12)));
+      str.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
+      str.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+    } else if (c >= 0x10000 && c <= 0x10ffff) {
+      str.push_back(static_cast<char>(0xf0 | (c >> 18)));
+      str.push_back(static_cast<char>(0x80 | ((c & 0x3ffff) >> 12)));
+      str.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
+      str.push_back(static_cast<char>(0x80 | (c & 0x3f)));
+    } else {
+      FMT_THROW(format_error("failed to format time"));
+    }
+  }
+  return str;
+}
+
+template <typename OutputIt>
+auto write(OutputIt out, const std::tm& time, const std::locale& loc,
+           char format, char modifier = 0) -> OutputIt {
+  auto str = do_write(time, loc, format, modifier);
+  return std::copy(str.begin(), str.end(), out);
+}
 }  // namespace detail
 
-// Thread-safe replacement for std::localtime
+FMT_MODULE_EXPORT_BEGIN
+
+/**
+  Converts given time since epoch as ``std::time_t`` value into calendar time,
+  expressed in local time. Unlike ``std::localtime``, this function is
+  thread-safe on most platforms.
+ */
 inline std::tm localtime(std::time_t time) {
   struct dispatcher {
     std::time_t time_;
@@ -330,7 +406,11 @@ inline std::tm localtime(
   return localtime(std::chrono::system_clock::to_time_t(time_point));
 }
 
-// Thread-safe replacement for std::gmtime
+/**
+  Converts given time since epoch as ``std::time_t`` value into calendar time,
+  expressed in Coordinated Universal Time (UTC). Unlike ``std::gmtime``, this
+  function is thread-safe on most platforms.
+ */
 inline std::tm gmtime(std::time_t time) {
   struct dispatcher {
     std::time_t time_;
@@ -371,44 +451,84 @@ inline std::tm gmtime(
   return gmtime(std::chrono::system_clock::to_time_t(time_point));
 }
 
-namespace detail {
+FMT_BEGIN_DETAIL_NAMESPACE
+
 inline size_t strftime(char* str, size_t count, const char* format,
                        const std::tm* time) {
-  return std::strftime(str, count, format, time);
+  // Assign to a pointer to suppress GCCs -Wformat-nonliteral
+  // First assign the nullptr to suppress -Wsuggest-attribute=format
+  std::size_t (*strftime)(char*, std::size_t, const char*, const std::tm*) =
+      nullptr;
+  strftime = std::strftime;
+  return strftime(str, count, format, time);
 }
 
 inline size_t strftime(wchar_t* str, size_t count, const wchar_t* format,
                        const std::tm* time) {
-  return std::wcsftime(str, count, format, time);
+  // See above
+  std::size_t (*wcsftime)(wchar_t*, std::size_t, const wchar_t*,
+                          const std::tm*) = nullptr;
+  wcsftime = std::wcsftime;
+  return wcsftime(str, count, format, time);
 }
-}  // namespace detail
 
-template <typename Char>
+FMT_END_DETAIL_NAMESPACE
-struct formatter<std::chrono::time_point<std::chrono::system_clock>, Char>
+
-    : formatter<std::tm, Char> {
+template <typename Char, typename Duration>
+struct formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
+                 Char> : formatter<std::tm, Char> {
+  FMT_CONSTEXPR formatter() {
+    this->specs = {default_specs, sizeof(default_specs) / sizeof(Char)};
+  }
+
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+    auto it = ctx.begin();
+    if (it != ctx.end() && *it == ':') ++it;
+    auto end = it;
+    while (end != ctx.end() && *end != '}') ++end;
+    if (end != it) this->specs = {it, detail::to_unsigned(end - it)};
+    return end;
+  }
+
   template <typename FormatContext>
   auto format(std::chrono::time_point<std::chrono::system_clock> val,
               FormatContext& ctx) -> decltype(ctx.out()) {
     std::tm time = localtime(val);
     return formatter<std::tm, Char>::format(time, ctx);
   }
+
+  static constexpr Char default_specs[] = {'%', 'Y', '-', '%', 'm', '-',
+                                           '%', 'd', ' ', '%', 'H', ':',
+                                           '%', 'M', ':', '%', 'S'};
 };
 
+template <typename Char, typename Duration>
+constexpr Char
+    formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
+              Char>::default_specs[];
+
 template <typename Char> struct formatter<std::tm, Char> {
   template <typename ParseContext>
-  auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
     auto it = ctx.begin();
     if (it != ctx.end() && *it == ':') ++it;
     auto end = it;
     while (end != ctx.end() && *end != '}') ++end;
-    tm_format.reserve(detail::to_unsigned(end - it + 1));
+    specs = {it, detail::to_unsigned(end - it)};
-    tm_format.append(it, end);
-    tm_format.push_back('\0');
     return end;
   }
 
   template <typename FormatContext>
-  auto format(const std::tm& tm, FormatContext& ctx) -> decltype(ctx.out()) {
+  auto format(const std::tm& tm, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    basic_memory_buffer<Char> tm_format;
+    tm_format.append(specs.begin(), specs.end());
+    // By appending an extra space we can distinguish an empty result that
+    // indicates insufficient buffer size from a guaranteed non-empty result
+    // https://github.com/fmtlib/fmt/issues/2238
+    tm_format.push_back(' ');
+    tm_format.push_back('\0');
     basic_memory_buffer<Char> buf;
     size_t start = buf.size();
     for (;;) {
@@ -418,49 +538,40 @@ template <typename Char> struct formatter<std::tm, Char> {
         buf.resize(start + count);
         break;
       }
-      if (size >= tm_format.size() * 256) {
-        // If the buffer is 256 times larger than the format string, assume
-        // that `strftime` gives an empty result. There doesn't seem to be a
-        // better way to distinguish the two cases:
-        // https://github.com/fmtlib/fmt/issues/367
-        break;
-      }
       const size_t MIN_GROWTH = 10;
       buf.reserve(buf.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH));
     }
-    return std::copy(buf.begin(), buf.end(), ctx.out());
+    // Remove the extra space.
+    return std::copy(buf.begin(), buf.end() - 1, ctx.out());
   }
 
-  basic_memory_buffer<Char> tm_format;
+  basic_string_view<Char> specs;
 };
 
-namespace detail {
+FMT_BEGIN_DETAIL_NAMESPACE
-template <typename Period> FMT_CONSTEXPR const char* get_units() {
+
+template <typename Period> FMT_CONSTEXPR inline const char* get_units() {
+  if (std::is_same<Period, std::atto>::value) return "as";
+  if (std::is_same<Period, std::femto>::value) return "fs";
+  if (std::is_same<Period, std::pico>::value) return "ps";
+  if (std::is_same<Period, std::nano>::value) return "ns";
+  if (std::is_same<Period, std::micro>::value) return "µs";
+  if (std::is_same<Period, std::milli>::value) return "ms";
+  if (std::is_same<Period, std::centi>::value) return "cs";
+  if (std::is_same<Period, std::deci>::value) return "ds";
+  if (std::is_same<Period, std::ratio<1>>::value) return "s";
+  if (std::is_same<Period, std::deca>::value) return "das";
+  if (std::is_same<Period, std::hecto>::value) return "hs";
+  if (std::is_same<Period, std::kilo>::value) return "ks";
+  if (std::is_same<Period, std::mega>::value) return "Ms";
+  if (std::is_same<Period, std::giga>::value) return "Gs";
+  if (std::is_same<Period, std::tera>::value) return "Ts";
+  if (std::is_same<Period, std::peta>::value) return "Ps";
+  if (std::is_same<Period, std::exa>::value) return "Es";
+  if (std::is_same<Period, std::ratio<60>>::value) return "m";
+  if (std::is_same<Period, std::ratio<3600>>::value) return "h";
   return nullptr;
 }
-template <> FMT_CONSTEXPR const char* get_units<std::atto>() { return "as"; }
-template <> FMT_CONSTEXPR const char* get_units<std::femto>() { return "fs"; }
-template <> FMT_CONSTEXPR const char* get_units<std::pico>() { return "ps"; }
-template <> FMT_CONSTEXPR const char* get_units<std::nano>() { return "ns"; }
-template <> FMT_CONSTEXPR const char* get_units<std::micro>() { return "µs"; }
-template <> FMT_CONSTEXPR const char* get_units<std::milli>() { return "ms"; }
-template <> FMT_CONSTEXPR const char* get_units<std::centi>() { return "cs"; }
-template <> FMT_CONSTEXPR const char* get_units<std::deci>() { return "ds"; }
-template <> FMT_CONSTEXPR const char* get_units<std::ratio<1>>() { return "s"; }
-template <> FMT_CONSTEXPR const char* get_units<std::deca>() { return "das"; }
-template <> FMT_CONSTEXPR const char* get_units<std::hecto>() { return "hs"; }
-template <> FMT_CONSTEXPR const char* get_units<std::kilo>() { return "ks"; }
-template <> FMT_CONSTEXPR const char* get_units<std::mega>() { return "Ms"; }
-template <> FMT_CONSTEXPR const char* get_units<std::giga>() { return "Gs"; }
-template <> FMT_CONSTEXPR const char* get_units<std::tera>() { return "Ts"; }
-template <> FMT_CONSTEXPR const char* get_units<std::peta>() { return "Ps"; }
-template <> FMT_CONSTEXPR const char* get_units<std::exa>() { return "Es"; }
-template <> FMT_CONSTEXPR const char* get_units<std::ratio<60>>() {
-  return "m";
-}
-template <> FMT_CONSTEXPR const char* get_units<std::ratio<3600>>() {
-  return "h";
-}
 
 enum class numeric_system {
   standard,
@@ -626,33 +737,50 @@ FMT_CONSTEXPR const Char* parse_chrono_format(const Char* begin,
   return ptr;
 }
 
-struct chrono_format_checker {
+template <typename Derived> struct null_chrono_spec_handler {
-  FMT_NORETURN void report_no_date() { FMT_THROW(format_error("no date")); }
+  FMT_CONSTEXPR void unsupported() {
+    static_cast<Derived*>(this)->unsupported();
+  }
+  FMT_CONSTEXPR void on_abbr_weekday() { unsupported(); }
+  FMT_CONSTEXPR void on_full_weekday() { unsupported(); }
+  FMT_CONSTEXPR void on_dec0_weekday(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_dec1_weekday(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_abbr_month() { unsupported(); }
+  FMT_CONSTEXPR void on_full_month() { unsupported(); }
+  FMT_CONSTEXPR void on_24_hour(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_12_hour(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_minute(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_second(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_datetime(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_loc_date(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_loc_time(numeric_system) { unsupported(); }
+  FMT_CONSTEXPR void on_us_date() { unsupported(); }
+  FMT_CONSTEXPR void on_iso_date() { unsupported(); }
+  FMT_CONSTEXPR void on_12_hour_time() { unsupported(); }
+  FMT_CONSTEXPR void on_24_hour_time() { unsupported(); }
+  FMT_CONSTEXPR void on_iso_time() { unsupported(); }
+  FMT_CONSTEXPR void on_am_pm() { unsupported(); }
+  FMT_CONSTEXPR void on_duration_value() { unsupported(); }
+  FMT_CONSTEXPR void on_duration_unit() { unsupported(); }
+  FMT_CONSTEXPR void on_utc_offset() { unsupported(); }
+  FMT_CONSTEXPR void on_tz_name() { unsupported(); }
+};
 
-  template <typename Char> void on_text(const Char*, const Char*) {}
+struct chrono_format_checker : null_chrono_spec_handler<chrono_format_checker> {
-  FMT_NORETURN void on_abbr_weekday() { report_no_date(); }
+  FMT_NORETURN void unsupported() { FMT_THROW(format_error("no date")); }
-  FMT_NORETURN void on_full_weekday() { report_no_date(); }
+
-  FMT_NORETURN void on_dec0_weekday(numeric_system) { report_no_date(); }
+  template <typename Char>
-  FMT_NORETURN void on_dec1_weekday(numeric_system) { report_no_date(); }
+  FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
-  FMT_NORETURN void on_abbr_month() { report_no_date(); }
+  FMT_CONSTEXPR void on_24_hour(numeric_system) {}
-  FMT_NORETURN void on_full_month() { report_no_date(); }
+  FMT_CONSTEXPR void on_12_hour(numeric_system) {}
-  void on_24_hour(numeric_system) {}
+  FMT_CONSTEXPR void on_minute(numeric_system) {}
-  void on_12_hour(numeric_system) {}
+  FMT_CONSTEXPR void on_second(numeric_system) {}
-  void on_minute(numeric_system) {}
+  FMT_CONSTEXPR void on_12_hour_time() {}
-  void on_second(numeric_system) {}
+  FMT_CONSTEXPR void on_24_hour_time() {}
-  FMT_NORETURN void on_datetime(numeric_system) { report_no_date(); }
+  FMT_CONSTEXPR void on_iso_time() {}
-  FMT_NORETURN void on_loc_date(numeric_system) { report_no_date(); }
+  FMT_CONSTEXPR void on_am_pm() {}
-  FMT_NORETURN void on_loc_time(numeric_system) { report_no_date(); }
+  FMT_CONSTEXPR void on_duration_value() {}
-  FMT_NORETURN void on_us_date() { report_no_date(); }
+  FMT_CONSTEXPR void on_duration_unit() {}
-  FMT_NORETURN void on_iso_date() { report_no_date(); }
-  void on_12_hour_time() {}
-  void on_24_hour_time() {}
-  void on_iso_time() {}
-  void on_am_pm() {}
-  void on_duration_value() {}
-  void on_duration_unit() {}
-  FMT_NORETURN void on_utc_offset() { report_no_date(); }
-  FMT_NORETURN void on_tz_name() { report_no_date(); }
 };
 
 template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
@@ -676,7 +804,8 @@ inline bool isfinite(T value) {
 // Converts value to int and checks that it's in the range [0, upper).
 template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
 inline int to_nonnegative_int(T value, int upper) {
-  FMT_ASSERT(value >= 0 && value <= upper, "invalid value");
+  FMT_ASSERT(value >= 0 && to_unsigned(value) <= to_unsigned(upper),
+             "invalid value");
   (void)upper;
   return static_cast<int>(value);
 }
@@ -754,15 +883,21 @@ inline std::chrono::duration<Rep, std::milli> get_milliseconds(
   return std::chrono::duration<Rep, std::milli>(static_cast<Rep>(ms));
 }
 
-template <typename Char, typename Rep, typename OutputIt>
+template <typename Char, typename Rep, typename OutputIt,
-OutputIt format_duration_value(OutputIt out, Rep val, int precision) {
+          FMT_ENABLE_IF(std::is_integral<Rep>::value)>
-  const Char pr_f[] = {'{', ':', '.', '{', '}', 'f', '}', 0};
+OutputIt format_duration_value(OutputIt out, Rep val, int) {
-  if (precision >= 0) return format_to(out, pr_f, val, precision);
+  return write<Char>(out, val);
-  const Char fp_f[] = {'{', ':', 'g', '}', 0};
-  const Char format[] = {'{', '}', 0};
-  return format_to(out, std::is_floating_point<Rep>::value ? fp_f : format,
-                   val);
 }
+
+template <typename Char, typename Rep, typename OutputIt,
+          FMT_ENABLE_IF(std::is_floating_point<Rep>::value)>
+OutputIt format_duration_value(OutputIt out, Rep val, int precision) {
+  auto specs = basic_format_specs<Char>();
+  specs.precision = precision;
+  specs.type = precision > 0 ? 'f' : 'g';
+  return write<Char>(out, val, specs);
+}
+
 template <typename Char, typename OutputIt>
 OutputIt copy_unit(string_view unit, OutputIt out, Char) {
   return std::copy(unit.begin(), unit.end(), out);
@@ -780,10 +915,15 @@ template <typename Char, typename Period, typename OutputIt>
 OutputIt format_duration_unit(OutputIt out) {
   if (const char* unit = get_units<Period>())
     return copy_unit(string_view(unit), out, Char());
-  const Char num_f[] = {'[', '{', '}', ']', 's', 0};
+  *out++ = '[';
-  if (const_check(Period::den == 1)) return format_to(out, num_f, Period::num);
+  out = write<Char>(out, Period::num);
-  const Char num_def_f[] = {'[', '{', '}', '/', '{', '}', ']', 's', 0};
+  if (const_check(Period::den != 1)) {
-  return format_to(out, num_def_f, Period::num, Period::den);
+    *out++ = '/';
+    out = write<Char>(out, Period::den);
+  }
+  *out++ = ']';
+  *out++ = 's';
+  return out;
 }
 
 template <typename FormatContext, typename OutputIt, typename Rep,
@@ -792,6 +932,7 @@ struct chrono_formatter {
   FormatContext& context;
   OutputIt out;
   int precision;
+  bool localized = false;
   // rep is unsigned to avoid overflow.
   using rep =
       conditional_t<std::is_integral<Rep>::value && sizeof(Rep) < sizeof(int),
@@ -886,13 +1027,9 @@ struct chrono_formatter {
 
   void format_localized(const tm& time, char format, char modifier = 0) {
     if (isnan(val)) return write_nan();
-    auto locale = context.locale().template get<std::locale>();
+    const auto& loc = localized ? context.locale().template get<std::locale>()
-    auto& facet = std::use_facet<std::time_put<char_type>>(locale);
+                                : std::locale::classic();
-    std::basic_ostringstream<char_type> os;
+    out = detail::write(out, time, loc, format, modifier);
-    os.imbue(locale);
-    facet.put(os, os, ' ', &time, format, modifier);
-    auto str = os.str();
-    std::copy(str.begin(), str.end(), out);
   }
 
   void on_text(const char_type* begin, const char_type* end) {
@@ -1005,17 +1142,59 @@ struct chrono_formatter {
     out = format_duration_unit<char_type, Period>(out);
   }
 };
-}  // namespace detail
+
+FMT_END_DETAIL_NAMESPACE
+
+#if defined(__cpp_lib_chrono) && __cpp_lib_chrono >= 201907
+using weekday = std::chrono::weekday;
+#else
+// A fallback version of weekday.
+class weekday {
+ private:
+  unsigned char value;
+
+ public:
+  weekday() = default;
+  explicit constexpr weekday(unsigned wd) noexcept
+      : value(static_cast<unsigned char>(wd != 7 ? wd : 0)) {}
+  constexpr unsigned c_encoding() const noexcept { return value; }
+};
+#endif
+
+// A rudimentary weekday formatter.
+template <> struct formatter<weekday> {
+ private:
+  bool localized = false;
+
+ public:
+  FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
+    auto begin = ctx.begin(), end = ctx.end();
+    if (begin != end && *begin == 'L') {
+      ++begin;
+      localized = true;
+    }
+    return begin;
+  }
+
+  auto format(weekday wd, format_context& ctx) -> decltype(ctx.out()) {
+    auto time = std::tm();
+    time.tm_wday = static_cast<int>(wd.c_encoding());
+    const auto& loc = localized ? ctx.locale().template get<std::locale>()
+                                : std::locale::classic();
+    return detail::write(ctx.out(), time, loc, 'a');
+  }
+};
 
 template <typename Rep, typename Period, typename Char>
 struct formatter<std::chrono::duration<Rep, Period>, Char> {
  private:
   basic_format_specs<Char> specs;
-  int precision;
+  int precision = -1;
   using arg_ref_type = detail::arg_ref<Char>;
   arg_ref_type width_ref;
   arg_ref_type precision_ref;
-  mutable basic_string_view<Char> format_str;
+  bool localized = false;
+  basic_string_view<Char> format_str;
   using duration = std::chrono::duration<Rep, Period>;
 
   struct spec_handler {
@@ -1038,17 +1217,21 @@ struct formatter<std::chrono::duration<Rep, Period>, Char> {
     }
 
     void on_error(const char* msg) { FMT_THROW(format_error(msg)); }
-    void on_fill(basic_string_view<Char> fill) { f.specs.fill = fill; }
+    FMT_CONSTEXPR void on_fill(basic_string_view<Char> fill) {
-    void on_align(align_t align) { f.specs.align = align; }
+      f.specs.fill = fill;
-    void on_width(int width) { f.specs.width = width; }
+    }
-    void on_precision(int _precision) { f.precision = _precision; }
+    FMT_CONSTEXPR void on_align(align_t align) { f.specs.align = align; }
-    void end_precision() {}
+    FMT_CONSTEXPR void on_width(int width) { f.specs.width = width; }
+    FMT_CONSTEXPR void on_precision(int _precision) {
+      f.precision = _precision;
+    }
+    FMT_CONSTEXPR void end_precision() {}
 
-    template <typename Id> void on_dynamic_width(Id arg_id) {
+    template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) {
       f.width_ref = make_arg_ref(arg_id);
     }
 
-    template <typename Id> void on_dynamic_precision(Id arg_id) {
+    template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) {
       f.precision_ref = make_arg_ref(arg_id);
     }
   };
@@ -1073,13 +1256,15 @@ struct formatter<std::chrono::duration<Rep, Period>, Char> {
       else
         handler.on_error("precision not allowed for this argument type");
     }
+    if (begin != end && *begin == 'L') {
+      ++begin;
+      localized = true;
+    }
     end = parse_chrono_format(begin, end, detail::chrono_format_checker());
     return {begin, end};
   }
 
  public:
-  formatter() : precision(-1) {}
-
   FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
       -> decltype(ctx.begin()) {
     auto range = do_parse(ctx);
@@ -1089,30 +1274,35 @@ struct formatter<std::chrono::duration<Rep, Period>, Char> {
   }
 
   template <typename FormatContext>
-  auto format(const duration& d, FormatContext& ctx) -> decltype(ctx.out()) {
+  auto format(const duration& d, FormatContext& ctx) const
+      -> decltype(ctx.out()) {
+    auto specs_copy = specs;
+    auto precision_copy = precision;
     auto begin = format_str.begin(), end = format_str.end();
     // As a possible future optimization, we could avoid extra copying if width
     // is not specified.
     basic_memory_buffer<Char> buf;
     auto out = std::back_inserter(buf);
-    detail::handle_dynamic_spec<detail::width_checker>(specs.width, width_ref,
+    detail::handle_dynamic_spec<detail::width_checker>(specs_copy.width,
-                                                       ctx);
+                                                       width_ref, ctx);
-    detail::handle_dynamic_spec<detail::precision_checker>(precision,
+    detail::handle_dynamic_spec<detail::precision_checker>(precision_copy,
                                                            precision_ref, ctx);
     if (begin == end || *begin == '}') {
-      out = detail::format_duration_value<Char>(out, d.count(), precision);
+      out = detail::format_duration_value<Char>(out, d.count(), precision_copy);
       detail::format_duration_unit<Char, Period>(out);
     } else {
       detail::chrono_formatter<FormatContext, decltype(out), Rep, Period> f(
           ctx, out, d);
-      f.precision = precision;
+      f.precision = precision_copy;
-      parse_chrono_format(begin, end, f);
+      f.localized = localized;
+      detail::parse_chrono_format(begin, end, f);
     }
     return detail::write(
-        ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs);
+        ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs_copy);
   }
 };
 
+FMT_MODULE_EXPORT_END
 FMT_END_NAMESPACE
 
 #endif  // FMT_CHRONO_H_

include/spdlog/fmt/bundled/color.h

@@ -10,7 +10,15 @@
 
 #include "format.h"
 
+// __declspec(deprecated) is broken in some MSVC versions.
+#if FMT_MSC_VER
+#  define FMT_DEPRECATED_NONMSVC
+#else
+#  define FMT_DEPRECATED_NONMSVC FMT_DEPRECATED
+#endif
+
 FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT_BEGIN
 
 enum class color : uint32_t {
   alice_blue = 0xF0F8FF,               // rgb(240,248,255)
@@ -198,7 +206,7 @@ struct rgb {
   uint8_t b;
 };
 
-namespace detail {
+FMT_BEGIN_DETAIL_NAMESPACE
 
 // color is a struct of either a rgb color or a terminal color.
 struct color_type {
@@ -221,9 +229,10 @@ struct color_type {
     uint32_t rgb_color;
   } value;
 };
-}  // namespace detail
 
-// Experimental text formatting support.
+FMT_END_DETAIL_NAMESPACE
+
+/** A text style consisting of foreground and background colors and emphasis. */
 class text_style {
  public:
   FMT_CONSTEXPR text_style(emphasis em = emphasis()) FMT_NOEXCEPT
@@ -260,33 +269,14 @@ class text_style {
     return lhs |= rhs;
   }
 
-  FMT_CONSTEXPR text_style& operator&=(const text_style& rhs) {
+  FMT_DEPRECATED_NONMSVC FMT_CONSTEXPR text_style& operator&=(
-    if (!set_foreground_color) {
+      const text_style& rhs) {
-      set_foreground_color = rhs.set_foreground_color;
+    return and_assign(rhs);
-      foreground_color = rhs.foreground_color;
-    } else if (rhs.set_foreground_color) {
-      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
-        FMT_THROW(format_error("can't AND a terminal color"));
-      foreground_color.value.rgb_color &= rhs.foreground_color.value.rgb_color;
-    }
-
-    if (!set_background_color) {
-      set_background_color = rhs.set_background_color;
-      background_color = rhs.background_color;
-    } else if (rhs.set_background_color) {
-      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
-        FMT_THROW(format_error("can't AND a terminal color"));
-      background_color.value.rgb_color &= rhs.background_color.value.rgb_color;
-    }
-
-    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) &
-                                static_cast<uint8_t>(rhs.ems));
-    return *this;
   }
 
-  friend FMT_CONSTEXPR text_style operator&(text_style lhs,
+  FMT_DEPRECATED_NONMSVC friend FMT_CONSTEXPR text_style
-                                            const text_style& rhs) {
+  operator&(text_style lhs, const text_style& rhs) {
-    return lhs &= rhs;
+    return lhs.and_assign(rhs);
   }
 
   FMT_CONSTEXPR bool has_foreground() const FMT_NOEXCEPT {
@@ -326,8 +316,34 @@ class text_style {
     }
   }
 
+  // DEPRECATED!
+  FMT_CONSTEXPR text_style& and_assign(const text_style& rhs) {
+    if (!set_foreground_color) {
+      set_foreground_color = rhs.set_foreground_color;
+      foreground_color = rhs.foreground_color;
+    } else if (rhs.set_foreground_color) {
+      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
+        FMT_THROW(format_error("can't AND a terminal color"));
+      foreground_color.value.rgb_color &= rhs.foreground_color.value.rgb_color;
+    }
+
+    if (!set_background_color) {
+      set_background_color = rhs.set_background_color;
+      background_color = rhs.background_color;
+    } else if (rhs.set_background_color) {
+      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
+        FMT_THROW(format_error("can't AND a terminal color"));
+      background_color.value.rgb_color &= rhs.background_color.value.rgb_color;
+    }
+
+    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) &
+                                static_cast<uint8_t>(rhs.ems));
+    return *this;
+  }
+
   friend FMT_CONSTEXPR_DECL text_style fg(detail::color_type foreground)
       FMT_NOEXCEPT;
+
   friend FMT_CONSTEXPR_DECL text_style bg(detail::color_type background)
       FMT_NOEXCEPT;
 
@@ -338,19 +354,22 @@ class text_style {
   emphasis ems;
 };
 
-FMT_CONSTEXPR text_style fg(detail::color_type foreground) FMT_NOEXCEPT {
+/** Creates a text style from the foreground (text) color. */
-  return text_style(/*is_foreground=*/true, foreground);
+FMT_CONSTEXPR inline text_style fg(detail::color_type foreground) FMT_NOEXCEPT {
+  return text_style(true, foreground);
 }
 
-FMT_CONSTEXPR text_style bg(detail::color_type background) FMT_NOEXCEPT {
+/** Creates a text style from the background color. */
-  return text_style(/*is_foreground=*/false, background);
+FMT_CONSTEXPR inline text_style bg(detail::color_type background) FMT_NOEXCEPT {
+  return text_style(false, background);
 }
 
-FMT_CONSTEXPR text_style operator|(emphasis lhs, emphasis rhs) FMT_NOEXCEPT {
+FMT_CONSTEXPR inline text_style operator|(emphasis lhs,
+                                          emphasis rhs) FMT_NOEXCEPT {
   return text_style(lhs) | rhs;
 }
 
-namespace detail {
+FMT_BEGIN_DETAIL_NAMESPACE
 
 template <typename Char> struct ansi_color_escape {
   FMT_CONSTEXPR ansi_color_escape(detail::color_type text_color,
@@ -358,7 +377,7 @@ template <typename Char> struct ansi_color_escape {
     // If we have a terminal color, we need to output another escape code
     // sequence.
     if (!text_color.is_rgb) {
-      bool is_background = esc == detail::data::background_color;
+      bool is_background = esc == string_view("\x1b[48;2;");
       uint32_t value = text_color.value.term_color;
       // Background ASCII codes are the same as the foreground ones but with
       // 10 more.
@@ -411,7 +430,7 @@ template <typename Char> struct ansi_color_escape {
   FMT_CONSTEXPR operator const Char*() const FMT_NOEXCEPT { return buffer; }
 
   FMT_CONSTEXPR const Char* begin() const FMT_NOEXCEPT { return buffer; }
-  FMT_CONSTEXPR const Char* end() const FMT_NOEXCEPT {
+  FMT_CONSTEXPR_CHAR_TRAITS const Char* end() const FMT_NOEXCEPT {
     return buffer + std::char_traits<Char>::length(buffer);
   }
 
@@ -430,13 +449,13 @@ template <typename Char> struct ansi_color_escape {
 template <typename Char>
 FMT_CONSTEXPR ansi_color_escape<Char> make_foreground_color(
     detail::color_type foreground) FMT_NOEXCEPT {
-  return ansi_color_escape<Char>(foreground, detail::data::foreground_color);
+  return ansi_color_escape<Char>(foreground, "\x1b[38;2;");
 }
 
 template <typename Char>
 FMT_CONSTEXPR ansi_color_escape<Char> make_background_color(
     detail::color_type background) FMT_NOEXCEPT {
-  return ansi_color_escape<Char>(background, detail::data::background_color);
+  return ansi_color_escape<Char>(background, "\x1b[48;2;");
 }
 
 template <typename Char>
@@ -455,18 +474,17 @@ inline void fputs<wchar_t>(const wchar_t* chars, FILE* stream) FMT_NOEXCEPT {
 }
 
 template <typename Char> inline void reset_color(FILE* stream) FMT_NOEXCEPT {
-  fputs(detail::data::reset_color, stream);
+  fputs("\x1b[0m", stream);
 }
 
 template <> inline void reset_color<wchar_t>(FILE* stream) FMT_NOEXCEPT {
-  fputs(detail::data::wreset_color, stream);
+  fputs(L"\x1b[0m", stream);
 }
 
 template <typename Char>
 inline void reset_color(buffer<Char>& buffer) FMT_NOEXCEPT {
-  const char* begin = data::reset_color;
+  auto reset_color = string_view("\x1b[0m");
-  const char* end = begin + sizeof(data::reset_color) - 1;
+  buffer.append(reset_color.begin(), reset_color.end());
-  buffer.append(begin, end);
 }
 
 template <typename Char>
@@ -489,10 +507,11 @@ void vformat_to(buffer<Char>& buf, const text_style& ts,
     auto background = detail::make_background_color<Char>(ts.get_background());
     buf.append(background.begin(), background.end());
   }
-  detail::vformat_to(buf, format_str, args);
+  detail::vformat_to(buf, format_str, args, {});
   if (has_style) detail::reset_color<Char>(buf);
 }
-}  // namespace detail
+
+FMT_END_DETAIL_NAMESPACE
 
 template <typename S, typename Char = char_t<S>>
 void vprint(std::FILE* f, const text_style& ts, const S& format,
@@ -523,11 +542,15 @@ void print(std::FILE* f, const text_style& ts, const S& format_str,
 }
 
 /**
+  \rst
   Formats a string and prints it to stdout using ANSI escape sequences to
   specify text formatting.
-  Example:
+
+  **Example**::
+
     fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
                "Elapsed time: {0:.2f} seconds", 1.23);
+  \endrst
  */
 template <typename S, typename... Args,
           FMT_ENABLE_IF(detail::is_string<S>::value)>
@@ -559,8 +582,8 @@ inline std::basic_string<Char> vformat(
 template <typename S, typename... Args, typename Char = char_t<S>>
 inline std::basic_string<Char> format(const text_style& ts, const S& format_str,
                                       const Args&... args) {
-  return vformat(ts, to_string_view(format_str),
+  return fmt::vformat(ts, to_string_view(format_str),
-                 fmt::make_args_checked<Args...>(format_str, args...));
+                      fmt::make_args_checked<Args...>(format_str, args...));
 }
 
 /**
@@ -571,7 +594,7 @@ template <typename OutputIt, typename Char,
 OutputIt vformat_to(
     OutputIt out, const text_style& ts, basic_string_view<Char> format_str,
     basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  decltype(detail::get_buffer<Char>(out)) buf(detail::get_buffer_init(out));
+  auto&& buf = detail::get_buffer<Char>(out);
   detail::vformat_to(buf, ts, format_str, args);
   return detail::get_iterator(buf);
 }
@@ -598,6 +621,7 @@ inline auto format_to(OutputIt out, const text_style& ts, const S& format_str,
                     fmt::make_args_checked<Args...>(format_str, args...));
 }
 
+FMT_MODULE_EXPORT_END
 FMT_END_NAMESPACE
 
 #endif  // FMT_COLOR_H_

include/spdlog/fmt/bundled/compile.h

@@ -8,13 +8,135 @@
 #ifndef FMT_COMPILE_H_
 #define FMT_COMPILE_H_
 
-#include <vector>
-
 #include "format.h"
 
 FMT_BEGIN_NAMESPACE
 namespace detail {
 
+// An output iterator that counts the number of objects written to it and
+// discards them.
+class counting_iterator {
+ private:
+  size_t count_;
+
+ public:
+  using iterator_category = std::output_iterator_tag;
+  using difference_type = std::ptrdiff_t;
+  using pointer = void;
+  using reference = void;
+  using _Unchecked_type = counting_iterator;  // Mark iterator as checked.
+
+  struct value_type {
+    template <typename T> void operator=(const T&) {}
+  };
+
+  counting_iterator() : count_(0) {}
+
+  size_t count() const { return count_; }
+
+  counting_iterator& operator++() {
+    ++count_;
+    return *this;
+  }
+  counting_iterator operator++(int) {
+    auto it = *this;
+    ++*this;
+    return it;
+  }
+
+  friend counting_iterator operator+(counting_iterator it, difference_type n) {
+    it.count_ += static_cast<size_t>(n);
+    return it;
+  }
+
+  value_type operator*() const { return {}; }
+};
+
+template <typename Char, typename InputIt>
+inline counting_iterator copy_str(InputIt begin, InputIt end,
+                                  counting_iterator it) {
+  return it + (end - begin);
+}
+
+template <typename OutputIt> class truncating_iterator_base {
+ protected:
+  OutputIt out_;
+  size_t limit_;
+  size_t count_ = 0;
+
+  truncating_iterator_base() : out_(), limit_(0) {}
+
+  truncating_iterator_base(OutputIt out, size_t limit)
+      : out_(out), limit_(limit) {}
+
+ public:
+  using iterator_category = std::output_iterator_tag;
+  using value_type = typename std::iterator_traits<OutputIt>::value_type;
+  using difference_type = std::ptrdiff_t;
+  using pointer = void;
+  using reference = void;
+  using _Unchecked_type =
+      truncating_iterator_base;  // Mark iterator as checked.
+
+  OutputIt base() const { return out_; }
+  size_t count() const { return count_; }
+};
+
+// An output iterator that truncates the output and counts the number of objects
+// written to it.
+template <typename OutputIt,
+          typename Enable = typename std::is_void<
+              typename std::iterator_traits<OutputIt>::value_type>::type>
+class truncating_iterator;
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::false_type>
+    : public truncating_iterator_base<OutputIt> {
+  mutable typename truncating_iterator_base<OutputIt>::value_type blackhole_;
+
+ public:
+  using value_type = typename truncating_iterator_base<OutputIt>::value_type;
+
+  truncating_iterator() = default;
+
+  truncating_iterator(OutputIt out, size_t limit)
+      : truncating_iterator_base<OutputIt>(out, limit) {}
+
+  truncating_iterator& operator++() {
+    if (this->count_++ < this->limit_) ++this->out_;
+    return *this;
+  }
+
+  truncating_iterator operator++(int) {
+    auto it = *this;
+    ++*this;
+    return it;
+  }
+
+  value_type& operator*() const {
+    return this->count_ < this->limit_ ? *this->out_ : blackhole_;
+  }
+};
+
+template <typename OutputIt>
+class truncating_iterator<OutputIt, std::true_type>
+    : public truncating_iterator_base<OutputIt> {
+ public:
+  truncating_iterator() = default;
+
+  truncating_iterator(OutputIt out, size_t limit)
+      : truncating_iterator_base<OutputIt>(out, limit) {}
+
+  template <typename T> truncating_iterator& operator=(T val) {
+    if (this->count_++ < this->limit_) *this->out_++ = val;
+    return *this;
+  }
+
+  truncating_iterator& operator++() { return *this; }
+  truncating_iterator& operator++(int) { return *this; }
+  truncating_iterator& operator*() { return *this; }
+};
+
 // A compile-time string which is compiled into fast formatting code.
 class compiled_string {};
 
@@ -34,335 +156,29 @@ struct is_compiled_string : std::is_base_of<compiled_string, S> {};
     std::string s = fmt::format(FMT_COMPILE("{}"), 42);
   \endrst
  */
-#define FMT_COMPILE(s) FMT_STRING_IMPL(s, fmt::detail::compiled_string)
+#ifdef __cpp_if_constexpr
+#  define FMT_COMPILE(s) \
+    FMT_STRING_IMPL(s, fmt::detail::compiled_string, explicit)
+#else
+#  define FMT_COMPILE(s) FMT_STRING(s)
+#endif
+
+#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+template <typename Char, size_t N,
+          fmt::detail_exported::fixed_string<Char, N> Str>
+struct udl_compiled_string : compiled_string {
+  using char_type = Char;
+  constexpr operator basic_string_view<char_type>() const {
+    return {Str.data, N - 1};
+  }
+};
+#endif
 
 template <typename T, typename... Tail>
 const T& first(const T& value, const Tail&...) {
   return value;
 }
 
-// Part of a compiled format string. It can be either literal text or a
-// replacement field.
-template <typename Char> struct format_part {
-  enum class kind { arg_index, arg_name, text, replacement };
-
-  struct replacement {
-    arg_ref<Char> arg_id;
-    dynamic_format_specs<Char> specs;
-  };
-
-  kind part_kind;
-  union value {
-    int arg_index;
-    basic_string_view<Char> str;
-    replacement repl;
-
-    FMT_CONSTEXPR value(int index = 0) : arg_index(index) {}
-    FMT_CONSTEXPR value(basic_string_view<Char> s) : str(s) {}
-    FMT_CONSTEXPR value(replacement r) : repl(r) {}
-  } val;
-  // Position past the end of the argument id.
-  const Char* arg_id_end = nullptr;
-
-  FMT_CONSTEXPR format_part(kind k = kind::arg_index, value v = {})
-      : part_kind(k), val(v) {}
-
-  static FMT_CONSTEXPR format_part make_arg_index(int index) {
-    return format_part(kind::arg_index, index);
-  }
-  static FMT_CONSTEXPR format_part make_arg_name(basic_string_view<Char> name) {
-    return format_part(kind::arg_name, name);
-  }
-  static FMT_CONSTEXPR format_part make_text(basic_string_view<Char> text) {
-    return format_part(kind::text, text);
-  }
-  static FMT_CONSTEXPR format_part make_replacement(replacement repl) {
-    return format_part(kind::replacement, repl);
-  }
-};
-
-template <typename Char> struct part_counter {
-  unsigned num_parts = 0;
-
-  FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
-    if (begin != end) ++num_parts;
-  }
-
-  FMT_CONSTEXPR int on_arg_id() { return ++num_parts, 0; }
-  FMT_CONSTEXPR int on_arg_id(int) { return ++num_parts, 0; }
-  FMT_CONSTEXPR int on_arg_id(basic_string_view<Char>) {
-    return ++num_parts, 0;
-  }
-
-  FMT_CONSTEXPR void on_replacement_field(int, const Char*) {}
-
-  FMT_CONSTEXPR const Char* on_format_specs(int, const Char* begin,
-                                            const Char* end) {
-    // Find the matching brace.
-    unsigned brace_counter = 0;
-    for (; begin != end; ++begin) {
-      if (*begin == '{') {
-        ++brace_counter;
-      } else if (*begin == '}') {
-        if (brace_counter == 0u) break;
-        --brace_counter;
-      }
-    }
-    return begin;
-  }
-
-  FMT_CONSTEXPR void on_error(const char*) {}
-};
-
-// Counts the number of parts in a format string.
-template <typename Char>
-FMT_CONSTEXPR unsigned count_parts(basic_string_view<Char> format_str) {
-  part_counter<Char> counter;
-  parse_format_string<true>(format_str, counter);
-  return counter.num_parts;
-}
-
-template <typename Char, typename PartHandler>
-class format_string_compiler : public error_handler {
- private:
-  using part = format_part<Char>;
-
-  PartHandler handler_;
-  part part_;
-  basic_string_view<Char> format_str_;
-  basic_format_parse_context<Char> parse_context_;
-
- public:
-  FMT_CONSTEXPR format_string_compiler(basic_string_view<Char> format_str,
-                                       PartHandler handler)
-      : handler_(handler),
-        format_str_(format_str),
-        parse_context_(format_str) {}
-
-  FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
-    if (begin != end)
-      handler_(part::make_text({begin, to_unsigned(end - begin)}));
-  }
-
-  FMT_CONSTEXPR int on_arg_id() {
-    part_ = part::make_arg_index(parse_context_.next_arg_id());
-    return 0;
-  }
-
-  FMT_CONSTEXPR int on_arg_id(int id) {
-    parse_context_.check_arg_id(id);
-    part_ = part::make_arg_index(id);
-    return 0;
-  }
-
-  FMT_CONSTEXPR int on_arg_id(basic_string_view<Char> id) {
-    part_ = part::make_arg_name(id);
-    return 0;
-  }
-
-  FMT_CONSTEXPR void on_replacement_field(int, const Char* ptr) {
-    part_.arg_id_end = ptr;
-    handler_(part_);
-  }
-
-  FMT_CONSTEXPR const Char* on_format_specs(int, const Char* begin,
-                                            const Char* end) {
-    auto repl = typename part::replacement();
-    dynamic_specs_handler<basic_format_parse_context<Char>> handler(
-        repl.specs, parse_context_);
-    auto it = parse_format_specs(begin, end, handler);
-    if (*it != '}') on_error("missing '}' in format string");
-    repl.arg_id = part_.part_kind == part::kind::arg_index
-                      ? arg_ref<Char>(part_.val.arg_index)
-                      : arg_ref<Char>(part_.val.str);
-    auto part = part::make_replacement(repl);
-    part.arg_id_end = begin;
-    handler_(part);
-    return it;
-  }
-};
-
-// Compiles a format string and invokes handler(part) for each parsed part.
-template <bool IS_CONSTEXPR, typename Char, typename PartHandler>
-FMT_CONSTEXPR void compile_format_string(basic_string_view<Char> format_str,
-                                         PartHandler handler) {
-  parse_format_string<IS_CONSTEXPR>(
-      format_str,
-      format_string_compiler<Char, PartHandler>(format_str, handler));
-}
-
-template <typename OutputIt, typename Context, typename Id>
-void format_arg(
-    basic_format_parse_context<typename Context::char_type>& parse_ctx,
-    Context& ctx, Id arg_id) {
-  ctx.advance_to(visit_format_arg(
-      arg_formatter<OutputIt, typename Context::char_type>(ctx, &parse_ctx),
-      ctx.arg(arg_id)));
-}
-
-// vformat_to is defined in a subnamespace to prevent ADL.
-namespace cf {
-template <typename Context, typename OutputIt, typename CompiledFormat>
-auto vformat_to(OutputIt out, CompiledFormat& cf,
-                basic_format_args<Context> args) -> typename Context::iterator {
-  using char_type = typename Context::char_type;
-  basic_format_parse_context<char_type> parse_ctx(
-      to_string_view(cf.format_str_));
-  Context ctx(out, args);
-
-  const auto& parts = cf.parts();
-  for (auto part_it = std::begin(parts); part_it != std::end(parts);
-       ++part_it) {
-    const auto& part = *part_it;
-    const auto& value = part.val;
-
-    using format_part_t = format_part<char_type>;
-    switch (part.part_kind) {
-    case format_part_t::kind::text: {
-      const auto text = value.str;
-      auto output = ctx.out();
-      auto&& it = reserve(output, text.size());
-      it = std::copy_n(text.begin(), text.size(), it);
-      ctx.advance_to(output);
-      break;
-    }
-
-    case format_part_t::kind::arg_index:
-      advance_to(parse_ctx, part.arg_id_end);
-      detail::format_arg<OutputIt>(parse_ctx, ctx, value.arg_index);
-      break;
-
-    case format_part_t::kind::arg_name:
-      advance_to(parse_ctx, part.arg_id_end);
-      detail::format_arg<OutputIt>(parse_ctx, ctx, value.str);
-      break;
-
-    case format_part_t::kind::replacement: {
-      const auto& arg_id_value = value.repl.arg_id.val;
-      const auto arg = value.repl.arg_id.kind == arg_id_kind::index
-                           ? ctx.arg(arg_id_value.index)
-                           : ctx.arg(arg_id_value.name);
-
-      auto specs = value.repl.specs;
-
-      handle_dynamic_spec<width_checker>(specs.width, specs.width_ref, ctx);
-      handle_dynamic_spec<precision_checker>(specs.precision,
-                                             specs.precision_ref, ctx);
-
-      error_handler h;
-      numeric_specs_checker<error_handler> checker(h, arg.type());
-      if (specs.align == align::numeric) checker.require_numeric_argument();
-      if (specs.sign != sign::none) checker.check_sign();
-      if (specs.alt) checker.require_numeric_argument();
-      if (specs.precision >= 0) checker.check_precision();
-
-      advance_to(parse_ctx, part.arg_id_end);
-      ctx.advance_to(
-          visit_format_arg(arg_formatter<OutputIt, typename Context::char_type>(
-                               ctx, nullptr, &specs),
-                           arg));
-      break;
-    }
-    }
-  }
-  return ctx.out();
-}
-}  // namespace cf
-
-struct basic_compiled_format {};
-
-template <typename S, typename = void>
-struct compiled_format_base : basic_compiled_format {
-  using char_type = char_t<S>;
-  using parts_container = std::vector<detail::format_part<char_type>>;
-
-  parts_container compiled_parts;
-
-  explicit compiled_format_base(basic_string_view<char_type> format_str) {
-    compile_format_string<false>(format_str,
-                                 [this](const format_part<char_type>& part) {
-                                   compiled_parts.push_back(part);
-                                 });
-  }
-
-  const parts_container& parts() const { return compiled_parts; }
-};
-
-template <typename Char, unsigned N> struct format_part_array {
-  format_part<Char> data[N] = {};
-  FMT_CONSTEXPR format_part_array() = default;
-};
-
-template <typename Char, unsigned N>
-FMT_CONSTEXPR format_part_array<Char, N> compile_to_parts(
-    basic_string_view<Char> format_str) {
-  format_part_array<Char, N> parts;
-  unsigned counter = 0;
-  // This is not a lambda for compatibility with older compilers.
-  struct {
-    format_part<Char>* parts;
-    unsigned* counter;
-    FMT_CONSTEXPR void operator()(const format_part<Char>& part) {
-      parts[(*counter)++] = part;
-    }
-  } collector{parts.data, &counter};
-  compile_format_string<true>(format_str, collector);
-  if (counter < N) {
-    parts.data[counter] =
-        format_part<Char>::make_text(basic_string_view<Char>());
-  }
-  return parts;
-}
-
-template <typename T> constexpr const T& constexpr_max(const T& a, const T& b) {
-  return (a < b) ? b : a;
-}
-
-template <typename S>
-struct compiled_format_base<S, enable_if_t<is_compile_string<S>::value>>
-    : basic_compiled_format {
-  using char_type = char_t<S>;
-
-  FMT_CONSTEXPR explicit compiled_format_base(basic_string_view<char_type>) {}
-
-// Workaround for old compilers. Format string compilation will not be
-// performed there anyway.
-#if FMT_USE_CONSTEXPR
-  static FMT_CONSTEXPR_DECL const unsigned num_format_parts =
-      constexpr_max(count_parts(to_string_view(S())), 1u);
-#else
-  static const unsigned num_format_parts = 1;
-#endif
-
-  using parts_container = format_part<char_type>[num_format_parts];
-
-  const parts_container& parts() const {
-    static FMT_CONSTEXPR_DECL const auto compiled_parts =
-        compile_to_parts<char_type, num_format_parts>(
-            detail::to_string_view(S()));
-    return compiled_parts.data;
-  }
-};
-
-template <typename S, typename... Args>
-class compiled_format : private compiled_format_base<S> {
- public:
-  using typename compiled_format_base<S>::char_type;
-
- private:
-  basic_string_view<char_type> format_str_;
-
-  template <typename Context, typename OutputIt, typename CompiledFormat>
-  friend auto cf::vformat_to(OutputIt out, CompiledFormat& cf,
-                             basic_format_args<Context> args) ->
-      typename Context::iterator;
-
- public:
-  compiled_format() = delete;
-  explicit constexpr compiled_format(basic_string_view<char_type> format_str)
-      : compiled_format_base<S>(format_str), format_str_(format_str) {}
-};
-
 #ifdef __cpp_if_constexpr
 template <typename... Args> struct type_list {};
 
@@ -377,6 +193,12 @@ constexpr const auto& get([[maybe_unused]] const T& first,
     return get<N - 1>(rest...);
 }
 
+template <typename Char, typename... Args>
+constexpr int get_arg_index_by_name(basic_string_view<Char> name,
+                                    type_list<Args...>) {
+  return get_arg_index_by_name<Args...>(name);
+}
+
 template <int N, typename> struct get_type_impl;
 
 template <int N, typename... Args> struct get_type_impl<N, type_list<Args...>> {
@@ -393,7 +215,7 @@ template <typename Char> struct text {
   using char_type = Char;
 
   template <typename OutputIt, typename... Args>
-  OutputIt format(OutputIt out, const Args&...) const {
+  constexpr OutputIt format(OutputIt out, const Args&...) const {
     return write<Char>(out, data);
   }
 };
@@ -412,11 +234,22 @@ template <typename Char> struct code_unit {
   using char_type = Char;
 
   template <typename OutputIt, typename... Args>
-  OutputIt format(OutputIt out, const Args&...) const {
+  constexpr OutputIt format(OutputIt out, const Args&...) const {
     return write<Char>(out, value);
   }
 };
 
+// This ensures that the argument type is convertible to `const T&`.
+template <typename T, int N, typename... Args>
+constexpr const T& get_arg_checked(const Args&... args) {
+  const auto& arg = get<N>(args...);
+  if constexpr (detail::is_named_arg<remove_cvref_t<decltype(arg)>>()) {
+    return arg.value;
+  } else {
+    return arg;
+  }
+}
+
 template <typename Char>
 struct is_compiled_format<code_unit<Char>> : std::true_type {};
 
@@ -425,29 +258,58 @@ template <typename Char, typename T, int N> struct field {
   using char_type = Char;
 
   template <typename OutputIt, typename... Args>
-  OutputIt format(OutputIt out, const Args&... args) const {
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
-    // This ensures that the argument type is convertile to `const T&`.
+    return write<Char>(out, get_arg_checked<T, N>(args...));
-    const T& arg = get<N>(args...);
-    return write<Char>(out, arg);
   }
 };
 
 template <typename Char, typename T, int N>
 struct is_compiled_format<field<Char, T, N>> : std::true_type {};
 
+// A replacement field that refers to argument with name.
+template <typename Char> struct runtime_named_field {
+  using char_type = Char;
+  basic_string_view<Char> name;
+
+  template <typename OutputIt, typename T>
+  constexpr static bool try_format_argument(
+      OutputIt& out,
+      // [[maybe_unused]] due to unused-but-set-parameter warning in GCC 7,8,9
+      [[maybe_unused]] basic_string_view<Char> arg_name, const T& arg) {
+    if constexpr (is_named_arg<typename std::remove_cv<T>::type>::value) {
+      if (arg_name == arg.name) {
+        out = write<Char>(out, arg.value);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  template <typename OutputIt, typename... Args>
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
+    bool found = (try_format_argument(out, name, args) || ...);
+    if (!found) {
+      throw format_error("argument with specified name is not found");
+    }
+    return out;
+  }
+};
+
+template <typename Char>
+struct is_compiled_format<runtime_named_field<Char>> : std::true_type {};
+
 // A replacement field that refers to argument N and has format specifiers.
 template <typename Char, typename T, int N> struct spec_field {
   using char_type = Char;
-  mutable formatter<T, Char> fmt;
+  formatter<T, Char> fmt;
 
   template <typename OutputIt, typename... Args>
-  OutputIt format(OutputIt out, const Args&... args) const {
+  constexpr FMT_INLINE OutputIt format(OutputIt out,
-    // This ensures that the argument type is convertile to `const T&`.
+                                       const Args&... args) const {
-    const T& arg = get<N>(args...);
     const auto& vargs =
-        make_format_args<basic_format_context<OutputIt, Char>>(args...);
+        fmt::make_format_args<basic_format_context<OutputIt, Char>>(args...);
     basic_format_context<OutputIt, Char> ctx(out, vargs);
-    return fmt.format(arg, ctx);
+    return fmt.format(get_arg_checked<T, N>(args...), ctx);
   }
 };
 
@@ -460,7 +322,7 @@ template <typename L, typename R> struct concat {
   using char_type = typename L::char_type;
 
   template <typename OutputIt, typename... Args>
-  OutputIt format(OutputIt out, const Args&... args) const {
+  constexpr OutputIt format(OutputIt out, const Args&... args) const {
     out = lhs.format(out, args...);
     return rhs.format(out, args...);
   }
@@ -508,14 +370,77 @@ template <typename T, typename Char> struct parse_specs_result {
   int next_arg_id;
 };
 
+constexpr int manual_indexing_id = -1;
+
 template <typename T, typename Char>
 constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
-                                                  size_t pos, int arg_id) {
+                                                  size_t pos, int next_arg_id) {
   str.remove_prefix(pos);
-  auto ctx = basic_format_parse_context<Char>(str, {}, arg_id + 1);
+  auto ctx = basic_format_parse_context<Char>(str, {}, next_arg_id);
   auto f = formatter<T, Char>();
   auto end = f.parse(ctx);
-  return {f, pos + (end - str.data()) + 1, ctx.next_arg_id()};
+  return {f, pos + fmt::detail::to_unsigned(end - str.data()) + 1,
+          next_arg_id == 0 ? manual_indexing_id : ctx.next_arg_id()};
+}
+
+template <typename Char> struct arg_id_handler {
+  arg_ref<Char> arg_id;
+
+  constexpr int operator()() {
+    FMT_ASSERT(false, "handler cannot be used with automatic indexing");
+    return 0;
+  }
+  constexpr int operator()(int id) {
+    arg_id = arg_ref<Char>(id);
+    return 0;
+  }
+  constexpr int operator()(basic_string_view<Char> id) {
+    arg_id = arg_ref<Char>(id);
+    return 0;
+  }
+
+  constexpr void on_error(const char* message) { throw format_error(message); }
+};
+
+template <typename Char> struct parse_arg_id_result {
+  arg_ref<Char> arg_id;
+  const Char* arg_id_end;
+};
+
+template <int ID, typename Char>
+constexpr auto parse_arg_id(const Char* begin, const Char* end) {
+  auto handler = arg_id_handler<Char>{arg_ref<Char>{}};
+  auto arg_id_end = parse_arg_id(begin, end, handler);
+  return parse_arg_id_result<Char>{handler.arg_id, arg_id_end};
+}
+
+template <typename T, typename Enable = void> struct field_type {
+  using type = remove_cvref_t<T>;
+};
+
+template <typename T>
+struct field_type<T, enable_if_t<detail::is_named_arg<T>::value>> {
+  using type = remove_cvref_t<decltype(T::value)>;
+};
+
+template <typename T, typename Args, size_t END_POS, int ARG_INDEX, int NEXT_ID,
+          typename S>
+constexpr auto parse_replacement_field_then_tail(S format_str) {
+  using char_type = typename S::char_type;
+  constexpr auto str = basic_string_view<char_type>(format_str);
+  constexpr char_type c = END_POS != str.size() ? str[END_POS] : char_type();
+  if constexpr (c == '}') {
+    return parse_tail<Args, END_POS + 1, NEXT_ID>(
+        field<char_type, typename field_type<T>::type, ARG_INDEX>(),
+        format_str);
+  } else if constexpr (c == ':') {
+    constexpr auto result = parse_specs<typename field_type<T>::type>(
+        str, END_POS + 1, NEXT_ID == manual_indexing_id ? 0 : NEXT_ID);
+    return parse_tail<Args, result.end, result.next_arg_id>(
+        spec_field<char_type, typename field_type<T>::type, ARG_INDEX>{
+            result.fmt},
+        format_str);
+  }
 }
 
 // Compiles a non-empty format string and returns the compiled representation
@@ -523,26 +448,58 @@ constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
 template <typename Args, size_t POS, int ID, typename S>
 constexpr auto compile_format_string(S format_str) {
   using char_type = typename S::char_type;
-  constexpr basic_string_view<char_type> str = format_str;
+  constexpr auto str = basic_string_view<char_type>(format_str);
   if constexpr (str[POS] == '{') {
-    if (POS + 1 == str.size())
+    if constexpr (POS + 1 == str.size())
       throw format_error("unmatched '{' in format string");
     if constexpr (str[POS + 1] == '{') {
       return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
-    } else if constexpr (str[POS + 1] == '}') {
+    } else if constexpr (str[POS + 1] == '}' || str[POS + 1] == ':') {
-      using type = get_type<ID, Args>;
+      static_assert(ID != manual_indexing_id,
-      return parse_tail<Args, POS + 2, ID + 1>(field<char_type, type, ID>(),
+                    "cannot switch from manual to automatic argument indexing");
-                                               format_str);
+      constexpr auto next_id =
-    } else if constexpr (str[POS + 1] == ':') {
+          ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
-      using type = get_type<ID, Args>;
+      return parse_replacement_field_then_tail<get_type<ID, Args>, Args,
-      constexpr auto result = parse_specs<type>(str, POS + 2, ID);
+                                               POS + 1, ID, next_id>(
-      return parse_tail<Args, result.end, result.next_arg_id>(
+          format_str);
-          spec_field<char_type, type, ID>{result.fmt}, format_str);
     } else {
-      return unknown_format();
+      constexpr auto arg_id_result =
+          parse_arg_id<ID>(str.data() + POS + 1, str.data() + str.size());
+      constexpr auto arg_id_end_pos = arg_id_result.arg_id_end - str.data();
+      constexpr char_type c =
+          arg_id_end_pos != str.size() ? str[arg_id_end_pos] : char_type();
+      static_assert(c == '}' || c == ':', "missing '}' in format string");
+      if constexpr (arg_id_result.arg_id.kind == arg_id_kind::index) {
+        static_assert(
+            ID == manual_indexing_id || ID == 0,
+            "cannot switch from automatic to manual argument indexing");
+        constexpr auto arg_index = arg_id_result.arg_id.val.index;
+        return parse_replacement_field_then_tail<get_type<arg_index, Args>,
+                                                 Args, arg_id_end_pos,
+                                                 arg_index, manual_indexing_id>(
+            format_str);
+      } else if constexpr (arg_id_result.arg_id.kind == arg_id_kind::name) {
+        constexpr auto arg_index =
+            get_arg_index_by_name(arg_id_result.arg_id.val.name, Args{});
+        if constexpr (arg_index != invalid_arg_index) {
+          constexpr auto next_id =
+              ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
+          return parse_replacement_field_then_tail<
+              decltype(get_type<arg_index, Args>::value), Args, arg_id_end_pos,
+              arg_index, next_id>(format_str);
+        } else {
+          if constexpr (c == '}') {
+            return parse_tail<Args, arg_id_end_pos + 1, ID>(
+                runtime_named_field<char_type>{arg_id_result.arg_id.val.name},
+                format_str);
+          } else if constexpr (c == ':') {
+            return unknown_format();  // no type info for specs parsing
+          }
+        }
+      }
     }
   } else if constexpr (str[POS] == '}') {
-    if (POS + 1 == str.size())
+    if constexpr (POS + 1 == str.size())
       throw format_error("unmatched '}' in format string");
     return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
   } else {
@@ -558,144 +515,125 @@ constexpr auto compile_format_string(S format_str) {
 }
 
 template <typename... Args, typename S,
-          FMT_ENABLE_IF(is_compile_string<S>::value ||
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-                        detail::is_compiled_string<S>::value)>
 constexpr auto compile(S format_str) {
-  constexpr basic_string_view<typename S::char_type> str = format_str;
+  constexpr auto str = basic_string_view<typename S::char_type>(format_str);
   if constexpr (str.size() == 0) {
     return detail::make_text(str, 0, 0);
   } else {
     constexpr auto result =
         detail::compile_format_string<detail::type_list<Args...>, 0, 0>(
             format_str);
-    if constexpr (std::is_same<remove_cvref_t<decltype(result)>,
+    return result;
-                               detail::unknown_format>()) {
-      return detail::compiled_format<S, Args...>(to_string_view(format_str));
-    } else {
-      return result;
-    }
   }
 }
-#else
-template <typename... Args, typename S,
-          FMT_ENABLE_IF(is_compile_string<S>::value)>
-constexpr auto compile(S format_str) -> detail::compiled_format<S, Args...> {
-  return detail::compiled_format<S, Args...>(to_string_view(format_str));
-}
 #endif  // __cpp_if_constexpr
-
-// Compiles the format string which must be a string literal.
-template <typename... Args, typename Char, size_t N>
-auto compile(const Char (&format_str)[N])
-    -> detail::compiled_format<const Char*, Args...> {
-  return detail::compiled_format<const Char*, Args...>(
-      basic_string_view<Char>(format_str, N - 1));
-}
 }  // namespace detail
 
-// DEPRECATED! use FMT_COMPILE instead.
+FMT_MODULE_EXPORT_BEGIN
-template <typename... Args>
-FMT_DEPRECATED auto compile(const Args&... args)
-    -> decltype(detail::compile(args...)) {
-  return detail::compile(args...);
-}
 
-#if FMT_USE_CONSTEXPR
+#ifdef __cpp_if_constexpr
-#  ifdef __cpp_if_constexpr
 
 template <typename CompiledFormat, typename... Args,
           typename Char = typename CompiledFormat::char_type,
           FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
 FMT_INLINE std::basic_string<Char> format(const CompiledFormat& cf,
                                           const Args&... args) {
-  basic_memory_buffer<Char> buffer;
+  auto s = std::basic_string<Char>();
-  cf.format(detail::buffer_appender<Char>(buffer), args...);
+  cf.format(std::back_inserter(s), args...);
-  return to_string(buffer);
+  return s;
 }
 
 template <typename OutputIt, typename CompiledFormat, typename... Args,
           FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
-OutputIt format_to(OutputIt out, const CompiledFormat& cf,
+constexpr FMT_INLINE OutputIt format_to(OutputIt out, const CompiledFormat& cf,
-                   const Args&... args) {
+                                        const Args&... args) {
   return cf.format(out, args...);
 }
-#  endif  // __cpp_if_constexpr
-#endif    // FMT_USE_CONSTEXPR
-
-template <typename CompiledFormat, typename... Args,
-          typename Char = typename CompiledFormat::char_type,
-          FMT_ENABLE_IF(std::is_base_of<detail::basic_compiled_format,
-                                        CompiledFormat>::value)>
-std::basic_string<Char> format(const CompiledFormat& cf, const Args&... args) {
-  basic_memory_buffer<Char> buffer;
-  using context = buffer_context<Char>;
-  detail::cf::vformat_to<context>(detail::buffer_appender<Char>(buffer), cf,
-                                  make_format_args<context>(args...));
-  return to_string(buffer);
-}
 
 template <typename S, typename... Args,
           FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
 FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
                                                            Args&&... args) {
-#ifdef __cpp_if_constexpr
   if constexpr (std::is_same<typename S::char_type, char>::value) {
-    constexpr basic_string_view<typename S::char_type> str = S();
+    constexpr auto str = basic_string_view<typename S::char_type>(S());
-    if (str.size() == 2 && str[0] == '{' && str[1] == '}')
+    if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}') {
-      return fmt::to_string(detail::first(args...));
+      const auto& first = detail::first(args...);
+      if constexpr (detail::is_named_arg<
+                        remove_cvref_t<decltype(first)>>::value) {
+        return fmt::to_string(first.value);
+      } else {
+        return fmt::to_string(first);
+      }
+    }
   }
+  constexpr auto compiled = detail::compile<Args...>(S());
+  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
+                             detail::unknown_format>()) {
+    return format(static_cast<basic_string_view<typename S::char_type>>(S()),
+                  std::forward<Args>(args)...);
+  } else {
+    return format(compiled, std::forward<Args>(args)...);
+  }
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) {
+  constexpr auto compiled = detail::compile<Args...>(S());
+  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
+                             detail::unknown_format>()) {
+    return format_to(out,
+                     static_cast<basic_string_view<typename S::char_type>>(S()),
+                     std::forward<Args>(args)...);
+  } else {
+    return format_to(out, compiled, std::forward<Args>(args)...);
+  }
+}
 #endif
-  constexpr auto compiled = detail::compile<Args...>(S());
-  return format(compiled, std::forward<Args>(args)...);
-}
-
-template <typename OutputIt, typename CompiledFormat, typename... Args,
-          FMT_ENABLE_IF(std::is_base_of<detail::basic_compiled_format,
-                                        CompiledFormat>::value)>
-OutputIt format_to(OutputIt out, const CompiledFormat& cf,
-                   const Args&... args) {
-  using char_type = typename CompiledFormat::char_type;
-  using context = format_context_t<OutputIt, char_type>;
-  return detail::cf::vformat_to<context>(out, cf,
-                                         make_format_args<context>(args...));
-}
 
 template <typename OutputIt, typename S, typename... Args,
           FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-OutputIt format_to(OutputIt out, const S&, const Args&... args) {
+format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n,
-  constexpr auto compiled = detail::compile<Args...>(S());
+                                         const S& format_str, Args&&... args) {
-  return format_to(out, compiled, args...);
+  auto it = format_to(detail::truncating_iterator<OutputIt>(out, n), format_str,
-}
+                      std::forward<Args>(args)...);
-
-template <typename OutputIt, typename CompiledFormat, typename... Args>
-auto format_to_n(OutputIt out, size_t n, const CompiledFormat& cf,
-                 const Args&... args) ->
-    typename std::enable_if<
-        detail::is_output_iterator<OutputIt,
-                                   typename CompiledFormat::char_type>::value &&
-            std::is_base_of<detail::basic_compiled_format,
-                            CompiledFormat>::value,
-        format_to_n_result<OutputIt>>::type {
-  auto it =
-      format_to(detail::truncating_iterator<OutputIt>(out, n), cf, args...);
   return {it.base(), it.count()};
 }
 
-template <typename OutputIt, typename S, typename... Args,
+template <typename S, typename... Args,
           FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-format_to_n_result<OutputIt> format_to_n(OutputIt out, size_t n, const S&,
+size_t formatted_size(const S& format_str, const Args&... args) {
-                                         const Args&... args) {
+  return format_to(detail::counting_iterator(), format_str, args...).count();
-  constexpr auto compiled = detail::compile<Args...>(S());
-  auto it = format_to(detail::truncating_iterator<OutputIt>(out, n), compiled,
-                      args...);
-  return {it.base(), it.count()};
 }
 
-template <typename CompiledFormat, typename... Args>
+template <typename S, typename... Args,
-size_t formatted_size(const CompiledFormat& cf, const Args&... args) {
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-  return format_to(detail::counting_iterator(), cf, args...).count();
+void print(std::FILE* f, const S& format_str, const Args&... args) {
+  memory_buffer buffer;
+  format_to(std::back_inserter(buffer), format_str, args...);
+  detail::print(f, {buffer.data(), buffer.size()});
 }
 
+template <typename S, typename... Args,
+          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
+void print(const S& format_str, const Args&... args) {
+  print(stdout, format_str, args...);
+}
+
+#if FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+inline namespace literals {
+template <detail_exported::fixed_string Str>
+constexpr detail::udl_compiled_string<
+    remove_cvref_t<decltype(Str.data[0])>,
+    sizeof(Str.data) / sizeof(decltype(Str.data[0])), Str>
+operator""_cf() {
+  return {};
+}
+}  // namespace literals
+#endif
+
+FMT_MODULE_EXPORT_END
 FMT_END_NAMESPACE
 
 #endif  // FMT_COMPILE_H_

include/spdlog/fmt/bundled/locale.h

@@ -1,64 +1,2 @@
-// Formatting library for C++ - std::locale support
+#include "xchar.h"
-//
+#warning fmt/locale.h is deprecated, include fmt/format.h or fmt/xchar.h instead
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_LOCALE_H_
-#define FMT_LOCALE_H_
-
-#include <locale>
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-
-namespace detail {
-template <typename Char>
-std::basic_string<Char> vformat(
-    const std::locale& loc, basic_string_view<Char> format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  basic_memory_buffer<Char> buffer;
-  detail::vformat_to(buffer, format_str, args, detail::locale_ref(loc));
-  return fmt::to_string(buffer);
-}
-}  // namespace detail
-
-template <typename S, typename Char = char_t<S>>
-inline std::basic_string<Char> vformat(
-    const std::locale& loc, const S& format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  return detail::vformat(loc, to_string_view(format_str), args);
-}
-
-template <typename S, typename... Args, typename Char = char_t<S>>
-inline std::basic_string<Char> format(const std::locale& loc,
-                                      const S& format_str, Args&&... args) {
-  return detail::vformat(loc, to_string_view(format_str),
-                         fmt::make_args_checked<Args...>(format_str, args...));
-}
-
-template <typename S, typename OutputIt, typename... Args,
-          typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
-inline OutputIt vformat_to(
-    OutputIt out, const std::locale& loc, const S& format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  decltype(detail::get_buffer<Char>(out)) buf(detail::get_buffer_init(out));
-  vformat_to(buf, to_string_view(format_str), args, detail::locale_ref(loc));
-  return detail::get_iterator(buf);
-}
-
-template <typename OutputIt, typename S, typename... Args,
-          bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value>
-inline auto format_to(OutputIt out, const std::locale& loc,
-                      const S& format_str, Args&&... args) ->
-    typename std::enable_if<enable, OutputIt>::type {
-  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
-  return vformat_to(out, loc, to_string_view(format_str), vargs);
-}
-
-FMT_END_NAMESPACE
-
-#endif  // FMT_LOCALE_H_

include/spdlog/fmt/bundled/os.h

@@ -8,16 +8,12 @@
 #ifndef FMT_OS_H_
 #define FMT_OS_H_
 
-#if defined(__MINGW32__) || defined(__CYGWIN__)
-// Workaround MinGW bug https://sourceforge.net/p/mingw/bugs/2024/.
-#  undef __STRICT_ANSI__
-#endif
-
 #include <cerrno>
-#include <clocale>  // for locale_t
+#include <clocale>  // locale_t
 #include <cstddef>
 #include <cstdio>
-#include <cstdlib>  // for strtod_l
+#include <cstdlib>       // strtod_l
+#include <system_error>  // std::system_error
 
 #if defined __APPLE__ || defined(__FreeBSD__)
 #  include <xlocale.h>  // for LC_NUMERIC_MASK on OS X
@@ -74,6 +70,7 @@
 #define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
 
 FMT_BEGIN_NAMESPACE
+FMT_MODULE_EXPORT_BEGIN
 
 /**
   \rst
@@ -122,19 +119,28 @@ template <typename Char> class basic_cstring_view {
 using cstring_view = basic_cstring_view<char>;
 using wcstring_view = basic_cstring_view<wchar_t>;
 
-// An error code.
+template <typename Char> struct formatter<std::error_code, Char> {
-class error_code {
+  template <typename ParseContext>
- private:
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-  int value_;
+    return ctx.begin();
+  }
 
- public:
+  template <typename FormatContext>
-  explicit error_code(int value = 0) FMT_NOEXCEPT : value_(value) {}
+  FMT_CONSTEXPR auto format(const std::error_code& ec, FormatContext& ctx) const
-
+      -> decltype(ctx.out()) {
-  int get() const FMT_NOEXCEPT { return value_; }
+    auto out = ctx.out();
+    out = detail::write_bytes(out, ec.category().name(),
+                              basic_format_specs<Char>());
+    out = detail::write<Char>(out, Char(':'));
+    out = detail::write<Char>(out, ec.value());
+    return out;
+  }
 };
 
 #ifdef _WIN32
-namespace detail {
+FMT_API const std::error_category& system_category() FMT_NOEXCEPT;
+
+FMT_BEGIN_DETAIL_NAMESPACE
 // A converter from UTF-16 to UTF-8.
 // It is only provided for Windows since other systems support UTF-8 natively.
 class utf16_to_utf8 {
@@ -143,7 +149,7 @@ class utf16_to_utf8 {
 
  public:
   utf16_to_utf8() {}
-  FMT_API explicit utf16_to_utf8(wstring_view s);
+  FMT_API explicit utf16_to_utf8(basic_string_view<wchar_t> s);
   operator string_view() const { return string_view(&buffer_[0], size()); }
   size_t size() const { return buffer_.size() - 1; }
   const char* c_str() const { return &buffer_[0]; }
@@ -152,59 +158,68 @@ class utf16_to_utf8 {
   // Performs conversion returning a system error code instead of
   // throwing exception on conversion error. This method may still throw
   // in case of memory allocation error.
-  FMT_API int convert(wstring_view s);
+  FMT_API int convert(basic_string_view<wchar_t> s);
 };
 
 FMT_API void format_windows_error(buffer<char>& out, int error_code,
-                                  string_view message) FMT_NOEXCEPT;
+                                  const char* message) FMT_NOEXCEPT;
-}  // namespace detail
+FMT_END_DETAIL_NAMESPACE
 
-/** A Windows error. */
+FMT_API std::system_error vwindows_error(int error_code, string_view format_str,
-class windows_error : public system_error {
+                                         format_args args);
- private:
-  FMT_API void init(int error_code, string_view format_str, format_args args);
 
- public:
+/**
-  /**
+ \rst
-   \rst
+ Constructs a :class:`std::system_error` object with the description
-   Constructs a :class:`fmt::windows_error` object with the description
+ of the form
-   of the form
 
-   .. parsed-literal::
+ .. parsed-literal::
-     *<message>*: *<system-message>*
+   *<message>*: *<system-message>*
 
-   where *<message>* is the formatted message and *<system-message>* is the
+ where *<message>* is the formatted message and *<system-message>* is the
-   system message corresponding to the error code.
+ system message corresponding to the error code.
-   *error_code* is a Windows error code as given by ``GetLastError``.
+ *error_code* is a Windows error code as given by ``GetLastError``.
-   If *error_code* is not a valid error code such as -1, the system message
+ If *error_code* is not a valid error code such as -1, the system message
-   will look like "error -1".
+ will look like "error -1".
 
-   **Example**::
+ **Example**::
 
-     // This throws a windows_error with the description
+   // This throws a system_error with the description
-     //   cannot open file 'madeup': The system cannot find the file specified.
+   //   cannot open file 'madeup': The system cannot find the file specified.
-     // or similar (system message may vary).
+   // or similar (system message may vary).
-     const char *filename = "madeup";
+   const char *filename = "madeup";
-     LPOFSTRUCT of = LPOFSTRUCT();
+   LPOFSTRUCT of = LPOFSTRUCT();
-     HFILE file = OpenFile(filename, &of, OF_READ);
+   HFILE file = OpenFile(filename, &of, OF_READ);
-     if (file == HFILE_ERROR) {
+   if (file == HFILE_ERROR) {
-       throw fmt::windows_error(GetLastError(),
+     throw fmt::windows_error(GetLastError(),
-                                "cannot open file '{}'", filename);
+                              "cannot open file '{}'", filename);
-     }
+   }
-   \endrst
+ \endrst
-  */
+*/
-  template <typename... Args>
+template <typename... Args>
-  windows_error(int error_code, string_view message, const Args&... args) {
+std::system_error windows_error(int error_code, string_view message,
-    init(error_code, message, make_format_args(args...));
+                                const Args&... args) {
-  }
+  return vwindows_error(error_code, message, fmt::make_format_args(args...));
-};
+}
 
 // Reports a Windows error without throwing an exception.
 // Can be used to report errors from destructors.
 FMT_API void report_windows_error(int error_code,
-                                  string_view message) FMT_NOEXCEPT;
+                                  const char* message) FMT_NOEXCEPT;
+#else
+inline const std::error_category& system_category() FMT_NOEXCEPT {
+  return std::system_category();
+}
 #endif  // _WIN32
 
+// std::system is not available on some platforms such as iOS (#2248).
+#ifdef __OSX__
+template <typename S, typename... Args, typename Char = char_t<S>>
+void say(const S& format_str, Args&&... args) {
+  std::system(format("say \"{}\"", format(format_str, args...)).c_str());
+}
+#endif
+
 // A buffered file.
 class buffered_file {
  private:
@@ -255,7 +270,7 @@ class buffered_file {
 
   template <typename... Args>
   inline void print(string_view format_str, const Args&... args) {
-    vprint(format_str, make_format_args(args...));
+    vprint(format_str, fmt::make_format_args(args...));
   }
 };
 
@@ -280,7 +295,8 @@ class file {
     WRONLY = FMT_POSIX(O_WRONLY),  // Open for writing only.
     RDWR = FMT_POSIX(O_RDWR),      // Open for reading and writing.
     CREATE = FMT_POSIX(O_CREAT),   // Create if the file doesn't exist.
-    APPEND = FMT_POSIX(O_APPEND)   // Open in append mode.
+    APPEND = FMT_POSIX(O_APPEND),  // Open in append mode.
+    TRUNC = FMT_POSIX(O_TRUNC)     // Truncate the content of the file.
   };
 
   // Constructs a file object which doesn't represent any file.
@@ -295,7 +311,8 @@ class file {
 
   file(file&& other) FMT_NOEXCEPT : fd_(other.fd_) { other.fd_ = -1; }
 
-  file& operator=(file&& other) FMT_NOEXCEPT {
+  // Move assignment is not noexcept because close may throw.
+  file& operator=(file&& other) {
     close();
     fd_ = other.fd_;
     other.fd_ = -1;
@@ -331,7 +348,7 @@ class file {
 
   // Makes fd be the copy of this file descriptor, closing fd first if
   // necessary.
-  FMT_API void dup2(int fd, error_code& ec) FMT_NOEXCEPT;
+  FMT_API void dup2(int fd, std::error_code& ec) FMT_NOEXCEPT;
 
   // Creates a pipe setting up read_end and write_end file objects for reading
   // and writing respectively.
@@ -345,9 +362,10 @@ class file {
 // Returns the memory page size.
 long getpagesize();
 
-namespace detail {
+FMT_BEGIN_DETAIL_NAMESPACE
 
 struct buffer_size {
+  buffer_size() = default;
   size_t value = 0;
   buffer_size operator=(size_t val) const {
     auto bs = buffer_size();
@@ -357,14 +375,14 @@ struct buffer_size {
 };
 
 struct ostream_params {
-  int oflag = file::WRONLY | file::CREATE;
+  int oflag = file::WRONLY | file::CREATE | file::TRUNC;
   size_t buffer_size = BUFSIZ > 32768 ? BUFSIZ : 32768;
 
   ostream_params() {}
 
   template <typename... T>
-  ostream_params(T... params, int oflag) : ostream_params(params...) {
+  ostream_params(T... params, int new_oflag) : ostream_params(params...) {
-    this->oflag = oflag;
+    oflag = new_oflag;
   }
 
   template <typename... T>
@@ -373,12 +391,13 @@ struct ostream_params {
     this->buffer_size = bs.value;
   }
 };
-}  // namespace detail
 
-static constexpr detail::buffer_size buffer_size;
+FMT_END_DETAIL_NAMESPACE
 
-// A fast output stream which is not thread-safe.
+constexpr detail::buffer_size buffer_size;
-class ostream final : private detail::buffer<char> {
+
+/** A fast output stream which is not thread-safe. */
+class FMT_API ostream final : private detail::buffer<char> {
  private:
   file file_;
 
@@ -388,7 +407,7 @@ class ostream final : private detail::buffer<char> {
     clear();
   }
 
-  FMT_API void grow(size_t) override final;
+  void grow(size_t) override;
 
   ostream(cstring_view path, const detail::ostream_params& params)
       : file_(path, params.oflag) {
@@ -399,6 +418,7 @@ class ostream final : private detail::buffer<char> {
   ostream(ostream&& other)
       : detail::buffer<char>(other.data(), other.size(), other.capacity()),
         file_(std::move(other.file_)) {
+    other.clear();
     other.set(nullptr, 0);
   }
   ~ostream() {
@@ -414,16 +434,30 @@ class ostream final : private detail::buffer<char> {
     file_.close();
   }
 
-  template <typename S, typename... Args>
+  /**
-  void print(const S& format_str, const Args&... args) {
+    Formats ``args`` according to specifications in ``fmt`` and writes the
-    format_to(detail::buffer_appender<char>(*this), format_str, args...);
+    output to the file.
+   */
+  template <typename... T> void print(format_string<T...> fmt, T&&... args) {
+    vformat_to(detail::buffer_appender<char>(*this), fmt,
+               fmt::make_format_args(args...));
   }
 };
 
 /**
-  Opens a file for writing. Supported parameters passed in `params`:
+  \rst
-  * ``<integer>``: Output flags (``file::WRONLY | file::CREATE`` by default)
+  Opens a file for writing. Supported parameters passed in *params*:
+
+  * ``<integer>``: Flags passed to `open
+    <https://pubs.opengroup.org/onlinepubs/007904875/functions/open.html>`_
+    (``file::WRONLY | file::CREATE`` by default)
   * ``buffer_size=<integer>``: Output buffer size
+
+  **Example**::
+
+    auto out = fmt::output_file("guide.txt");
+    out.print("Don't {}", "Panic");
+  \endrst
  */
 template <typename... T>
 inline ostream output_file(cstring_view path, T... params) {
@@ -475,6 +509,7 @@ class locale {
 };
 using Locale FMT_DEPRECATED_ALIAS = locale;
 #endif  // FMT_LOCALE
+FMT_MODULE_EXPORT_END
 FMT_END_NAMESPACE
 
 #endif  // FMT_OS_H_

include/spdlog/fmt/bundled/ostream.h

@@ -85,6 +85,8 @@ template <typename T, typename Char> class is_streamable {
   using result = decltype(test<T>(0));
 
  public:
+  is_streamable() = default;
+
   static const bool value = result::value;
 };
 
@@ -149,6 +151,7 @@ struct fallback_formatter<T, Char, enable_if_t<is_streamable<T, Char>::value>>
 };
 }  // namespace detail
 
+FMT_MODULE_EXPORT
 template <typename Char>
 void vprint(std::basic_ostream<Char>& os, basic_string_view<Char> format_str,
             basic_format_args<buffer_context<type_identity_t<Char>>> args) {
@@ -166,6 +169,7 @@ void vprint(std::basic_ostream<Char>& os, basic_string_view<Char> format_str,
     fmt::print(cerr, "Don't {}!", "panic");
   \endrst
  */
+FMT_MODULE_EXPORT
 template <typename S, typename... Args,
           typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
 void print(std::basic_ostream<Char>& os, const S& format_str, Args&&... args) {

include/spdlog/fmt/bundled/posix.h

@@ -1,2 +0,0 @@
-#include "os.h"
-#warning "fmt/posix.h is deprecated; use fmt/os.h instead"

include/spdlog/fmt/bundled/printf.h

@@ -10,11 +10,54 @@
 
 #include <algorithm>  // std::max
 #include <limits>     // std::numeric_limits
+#include <ostream>
 
-#include "ostream.h"
+#include "format.h"
 
 FMT_BEGIN_NAMESPACE
-namespace detail {
+FMT_MODULE_EXPORT_BEGIN
+
+template <typename T> struct printf_formatter { printf_formatter() = delete; };
+
+template <typename Char>
+class basic_printf_parse_context : public basic_format_parse_context<Char> {
+  using basic_format_parse_context<Char>::basic_format_parse_context;
+};
+
+template <typename OutputIt, typename Char> class basic_printf_context {
+ private:
+  OutputIt out_;
+  basic_format_args<basic_printf_context> args_;
+
+ public:
+  using char_type = Char;
+  using format_arg = basic_format_arg<basic_printf_context>;
+  using parse_context_type = basic_printf_parse_context<Char>;
+  template <typename T> using formatter_type = printf_formatter<T>;
+
+  /**
+    \rst
+    Constructs a ``printf_context`` object. References to the arguments are
+    stored in the context object so make sure they have appropriate lifetimes.
+    \endrst
+   */
+  basic_printf_context(OutputIt out,
+                       basic_format_args<basic_printf_context> args)
+      : out_(out), args_(args) {}
+
+  OutputIt out() { return out_; }
+  void advance_to(OutputIt it) { out_ = it; }
+
+  detail::locale_ref locale() { return {}; }
+
+  format_arg arg(int id) const { return args_.get(id); }
+
+  FMT_CONSTEXPR void on_error(const char* message) {
+    detail::error_handler().on_error(message);
+  }
+};
+
+FMT_BEGIN_DETAIL_NAMESPACE
 
 // Checks if a value fits in int - used to avoid warnings about comparing
 // signed and unsigned integers.
@@ -178,79 +221,34 @@ template <typename Char> class printf_width_handler {
   }
 };
 
-template <typename Char, typename Context>
+// The ``printf`` argument formatter.
-void vprintf(buffer<Char>& buf, basic_string_view<Char> format,
-             basic_format_args<Context> args) {
-  Context(buffer_appender<Char>(buf), format, args).format();
-}
-}  // namespace detail
-
-// For printing into memory_buffer.
-template <typename Char, typename Context>
-FMT_DEPRECATED void printf(detail::buffer<Char>& buf,
-                           basic_string_view<Char> format,
-                           basic_format_args<Context> args) {
-  return detail::vprintf(buf, format, args);
-}
-using detail::vprintf;
-
-template <typename Char>
-class basic_printf_parse_context : public basic_format_parse_context<Char> {
-  using basic_format_parse_context<Char>::basic_format_parse_context;
-};
-template <typename OutputIt, typename Char> class basic_printf_context;
-
-/**
-  \rst
-  The ``printf`` argument formatter.
-  \endrst
- */
 template <typename OutputIt, typename Char>
-class printf_arg_formatter : public detail::arg_formatter_base<OutputIt, Char> {
+class printf_arg_formatter : public arg_formatter<Char> {
- public:
-  using iterator = OutputIt;
-
  private:
-  using char_type = Char;
+  using base = arg_formatter<Char>;
-  using base = detail::arg_formatter_base<OutputIt, Char>;
   using context_type = basic_printf_context<OutputIt, Char>;
+  using format_specs = basic_format_specs<Char>;
 
   context_type& context_;
 
-  void write_null_pointer(char) {
+  OutputIt write_null_pointer(bool is_string = false) {
-    this->specs()->type = 0;
+    auto s = this->specs;
-    this->write("(nil)");
+    s.type = 0;
-  }
+    return write_bytes(this->out, is_string ? "(null)" : "(nil)", s);
-
-  void write_null_pointer(wchar_t) {
-    this->specs()->type = 0;
-    this->write(L"(nil)");
   }
 
  public:
-  using format_specs = typename base::format_specs;
+  printf_arg_formatter(OutputIt iter, format_specs& s, context_type& ctx)
+      : base{iter, s, locale_ref()}, context_(ctx) {}
 
-  /**
+  OutputIt operator()(monostate value) { return base::operator()(value); }
-    \rst
-    Constructs an argument formatter object.
-    *buffer* is a reference to the output buffer and *specs* contains format
-    specifier information for standard argument types.
-    \endrst
-   */
-  printf_arg_formatter(iterator iter, format_specs& specs, context_type& ctx)
-      : base(iter, &specs, detail::locale_ref()), context_(ctx) {}
 
-  template <typename T, FMT_ENABLE_IF(fmt::detail::is_integral<T>::value)>
+  template <typename T, FMT_ENABLE_IF(detail::is_integral<T>::value)>
-  iterator operator()(T value) {
+  OutputIt operator()(T value) {
-    // MSVC2013 fails to compile separate overloads for bool and char_type so
+    // MSVC2013 fails to compile separate overloads for bool and Char so use
-    // use std::is_same instead.
+    // std::is_same instead.
-    if (std::is_same<T, bool>::value) {
+    if (std::is_same<T, Char>::value) {
-      format_specs& fmt_specs = *this->specs();
+      format_specs fmt_specs = this->specs;
-      if (fmt_specs.type != 's') return base::operator()(value ? 1 : 0);
-      fmt_specs.type = 0;
-      this->write(value != 0);
-    } else if (std::is_same<T, char_type>::value) {
-      format_specs& fmt_specs = *this->specs();
       if (fmt_specs.type && fmt_specs.type != 'c')
         return (*this)(static_cast<int>(value));
       fmt_specs.sign = sign::none;
@@ -260,138 +258,49 @@ class printf_arg_formatter : public detail::arg_formatter_base<OutputIt, Char> {
       // ignored for non-numeric types
       if (fmt_specs.align == align::none || fmt_specs.align == align::numeric)
         fmt_specs.align = align::right;
-      return base::operator()(value);
+      return write<Char>(this->out, static_cast<Char>(value), fmt_specs);
-    } else {
-      return base::operator()(value);
     }
-    return this->out();
+    return base::operator()(value);
   }
 
   template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-  iterator operator()(T value) {
+  OutputIt operator()(T value) {
     return base::operator()(value);
   }
 
   /** Formats a null-terminated C string. */
-  iterator operator()(const char* value) {
+  OutputIt operator()(const char* value) {
-    if (value)
+    if (value) return base::operator()(value);
-      base::operator()(value);
+    return write_null_pointer(this->specs.type != 'p');
-    else if (this->specs()->type == 'p')
-      write_null_pointer(char_type());
-    else
-      this->write("(null)");
-    return this->out();
   }
 
   /** Formats a null-terminated wide C string. */
-  iterator operator()(const wchar_t* value) {
+  OutputIt operator()(const wchar_t* value) {
-    if (value)
+    if (value) return base::operator()(value);
-      base::operator()(value);
+    return write_null_pointer(this->specs.type != 'p');
-    else if (this->specs()->type == 'p')
-      write_null_pointer(char_type());
-    else
-      this->write(L"(null)");
-    return this->out();
   }
 
-  iterator operator()(basic_string_view<char_type> value) {
+  OutputIt operator()(basic_string_view<Char> value) {
     return base::operator()(value);
   }
 
-  iterator operator()(monostate value) { return base::operator()(value); }
-
   /** Formats a pointer. */
-  iterator operator()(const void* value) {
+  OutputIt operator()(const void* value) {
-    if (value) return base::operator()(value);
+    return value ? base::operator()(value) : write_null_pointer();
-    this->specs()->type = 0;
-    write_null_pointer(char_type());
-    return this->out();
   }
 
   /** Formats an argument of a custom (user-defined) type. */
-  iterator operator()(typename basic_format_arg<context_type>::handle handle) {
+  OutputIt operator()(typename basic_format_arg<context_type>::handle handle) {
-    handle.format(context_.parse_context(), context_);
+    auto parse_ctx =
-    return this->out();
+        basic_printf_parse_context<Char>(basic_string_view<Char>());
+    handle.format(parse_ctx, context_);
+    return this->out;
   }
 };
 
-template <typename T> struct printf_formatter {
+template <typename Char>
-  printf_formatter() = delete;
+void parse_flags(basic_format_specs<Char>& specs, const Char*& it,
-
+                 const Char* end) {
-  template <typename ParseContext>
-  auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename FormatContext>
-  auto format(const T& value, FormatContext& ctx) -> decltype(ctx.out()) {
-    detail::format_value(detail::get_container(ctx.out()), value);
-    return ctx.out();
-  }
-};
-
-/**
- This template formats data and writes the output through an output iterator.
- */
-template <typename OutputIt, typename Char> class basic_printf_context {
- public:
-  /** The character type for the output. */
-  using char_type = Char;
-  using iterator = OutputIt;
-  using format_arg = basic_format_arg<basic_printf_context>;
-  using parse_context_type = basic_printf_parse_context<Char>;
-  template <typename T> using formatter_type = printf_formatter<T>;
-
- private:
-  using format_specs = basic_format_specs<char_type>;
-
-  OutputIt out_;
-  basic_format_args<basic_printf_context> args_;
-  parse_context_type parse_ctx_;
-
-  static void parse_flags(format_specs& specs, const Char*& it,
-                          const Char* end);
-
-  // Returns the argument with specified index or, if arg_index is -1, the next
-  // argument.
-  format_arg get_arg(int arg_index = -1);
-
-  // Parses argument index, flags and width and returns the argument index.
-  int parse_header(const Char*& it, const Char* end, format_specs& specs);
-
- public:
-  /**
-   \rst
-   Constructs a ``printf_context`` object. References to the arguments are
-   stored in the context object so make sure they have appropriate lifetimes.
-   \endrst
-   */
-  basic_printf_context(OutputIt out, basic_string_view<char_type> format_str,
-                       basic_format_args<basic_printf_context> args)
-      : out_(out), args_(args), parse_ctx_(format_str) {}
-
-  OutputIt out() { return out_; }
-  void advance_to(OutputIt it) { out_ = it; }
-
-  detail::locale_ref locale() { return {}; }
-
-  format_arg arg(int id) const { return args_.get(id); }
-
-  parse_context_type& parse_context() { return parse_ctx_; }
-
-  FMT_CONSTEXPR void on_error(const char* message) {
-    parse_ctx_.on_error(message);
-  }
-
-  /** Formats stored arguments and writes the output to the range. */
-  template <typename ArgFormatter = printf_arg_formatter<OutputIt, Char>>
-  OutputIt format();
-};
-
-template <typename OutputIt, typename Char>
-void basic_printf_context<OutputIt, Char>::parse_flags(format_specs& specs,
-                                                       const Char*& it,
-                                                       const Char* end) {
   for (; it != end; ++it) {
     switch (*it) {
     case '-':
@@ -417,35 +326,24 @@ void basic_printf_context<OutputIt, Char>::parse_flags(format_specs& specs,
   }
 }
 
-template <typename OutputIt, typename Char>
+template <typename Char, typename GetArg>
-typename basic_printf_context<OutputIt, Char>::format_arg
+int parse_header(const Char*& it, const Char* end,
-basic_printf_context<OutputIt, Char>::get_arg(int arg_index) {
+                 basic_format_specs<Char>& specs, GetArg get_arg) {
-  if (arg_index < 0)
-    arg_index = parse_ctx_.next_arg_id();
-  else
-    parse_ctx_.check_arg_id(--arg_index);
-  return detail::get_arg(*this, arg_index);
-}
-
-template <typename OutputIt, typename Char>
-int basic_printf_context<OutputIt, Char>::parse_header(const Char*& it,
-                                                       const Char* end,
-                                                       format_specs& specs) {
   int arg_index = -1;
-  char_type c = *it;
+  Char c = *it;
   if (c >= '0' && c <= '9') {
     // Parse an argument index (if followed by '$') or a width possibly
     // preceded with '0' flag(s).
-    detail::error_handler eh;
+    int value = parse_nonnegative_int(it, end, -1);
-    int value = parse_nonnegative_int(it, end, eh);
     if (it != end && *it == '$') {  // value is an argument index
       ++it;
-      arg_index = value;
+      arg_index = value != -1 ? value : max_value<int>();
     } else {
       if (c == '0') specs.fill[0] = '0';
       if (value != 0) {
         // Nonzero value means that we parsed width and don't need to
         // parse it or flags again, so return now.
+        if (value == -1) FMT_THROW(format_error("number is too big"));
         specs.width = value;
         return arg_index;
       }
@@ -455,58 +353,76 @@ int basic_printf_context<OutputIt, Char>::parse_header(const Char*& it,
   // Parse width.
   if (it != end) {
     if (*it >= '0' && *it <= '9') {
-      detail::error_handler eh;
+      specs.width = parse_nonnegative_int(it, end, -1);
-      specs.width = parse_nonnegative_int(it, end, eh);
+      if (specs.width == -1) FMT_THROW(format_error("number is too big"));
     } else if (*it == '*') {
       ++it;
       specs.width = static_cast<int>(visit_format_arg(
-          detail::printf_width_handler<char_type>(specs), get_arg()));
+          detail::printf_width_handler<Char>(specs), get_arg(-1)));
     }
   }
   return arg_index;
 }
 
-template <typename OutputIt, typename Char>
+template <typename Char, typename Context>
-template <typename ArgFormatter>
+void vprintf(buffer<Char>& buf, basic_string_view<Char> format,
-OutputIt basic_printf_context<OutputIt, Char>::format() {
+             basic_format_args<Context> args) {
-  auto out = this->out();
+  using OutputIt = buffer_appender<Char>;
-  const Char* start = parse_ctx_.begin();
+  auto out = OutputIt(buf);
-  const Char* end = parse_ctx_.end();
+  auto context = basic_printf_context<OutputIt, Char>(out, args);
+  auto parse_ctx = basic_printf_parse_context<Char>(format);
+
+  // Returns the argument with specified index or, if arg_index is -1, the next
+  // argument.
+  auto get_arg = [&](int arg_index) {
+    if (arg_index < 0)
+      arg_index = parse_ctx.next_arg_id();
+    else
+      parse_ctx.check_arg_id(--arg_index);
+    return detail::get_arg(context, arg_index);
+  };
+
+  const Char* start = parse_ctx.begin();
+  const Char* end = parse_ctx.end();
   auto it = start;
   while (it != end) {
-    char_type c = *it++;
+    if (!detail::find<false, Char>(it, end, '%', it)) {
-    if (c != '%') continue;
+      it = end;  // detail::find leaves it == nullptr if it doesn't find '%'
+      break;
+    }
+    Char c = *it++;
     if (it != end && *it == c) {
-      out = std::copy(start, it, out);
+      out = detail::write(
+          out, basic_string_view<Char>(start, detail::to_unsigned(it - start)));
       start = ++it;
       continue;
     }
-    out = std::copy(start, it - 1, out);
+    out = detail::write(out, basic_string_view<Char>(
+                                 start, detail::to_unsigned(it - 1 - start)));
 
-    format_specs specs;
+    basic_format_specs<Char> specs;
     specs.align = align::right;
 
     // Parse argument index, flags and width.
-    int arg_index = parse_header(it, end, specs);
+    int arg_index = parse_header(it, end, specs, get_arg);
-    if (arg_index == 0) on_error("argument not found");
+    if (arg_index == 0) parse_ctx.on_error("argument not found");
 
     // Parse precision.
     if (it != end && *it == '.') {
       ++it;
       c = it != end ? *it : 0;
       if ('0' <= c && c <= '9') {
-        detail::error_handler eh;
+        specs.precision = parse_nonnegative_int(it, end, 0);
-        specs.precision = parse_nonnegative_int(it, end, eh);
       } else if (c == '*') {
         ++it;
         specs.precision = static_cast<int>(
-            visit_format_arg(detail::printf_precision_handler(), get_arg()));
+            visit_format_arg(detail::printf_precision_handler(), get_arg(-1)));
       } else {
         specs.precision = 0;
       }
     }
 
-    format_arg arg = get_arg(arg_index);
+    auto arg = get_arg(arg_index);
     // For d, i, o, u, x, and X conversion specifiers, if a precision is
     // specified, the '0' flag is ignored
     if (specs.precision >= 0 && arg.is_integral())
@@ -516,9 +432,10 @@ OutputIt basic_printf_context<OutputIt, Char>::format() {
       auto str = visit_format_arg(detail::get_cstring<Char>(), arg);
       auto str_end = str + specs.precision;
       auto nul = std::find(str, str_end, Char());
-      arg = detail::make_arg<basic_printf_context>(basic_string_view<Char>(
+      arg = detail::make_arg<basic_printf_context<OutputIt, Char>>(
-          str,
+          basic_string_view<Char>(
-          detail::to_unsigned(nul != str_end ? nul - str : specs.precision)));
+              str, detail::to_unsigned(nul != str_end ? nul - str
+                                                      : specs.precision)));
     }
     if (specs.alt && visit_format_arg(detail::is_zero_int(), arg))
       specs.alt = false;
@@ -532,7 +449,7 @@ OutputIt basic_printf_context<OutputIt, Char>::format() {
 
     // Parse length and convert the argument to the required type.
     c = it != end ? *it++ : 0;
-    char_type t = it != end ? *it : 0;
+    Char t = it != end ? *it : 0;
     using detail::convert_arg;
     switch (c) {
     case 'h':
@@ -582,8 +499,9 @@ OutputIt basic_printf_context<OutputIt, Char>::format() {
         specs.type = 'd';
         break;
       case 'c':
-        visit_format_arg(detail::char_converter<basic_printf_context>(arg),
+        visit_format_arg(
-                         arg);
+            detail::char_converter<basic_printf_context<OutputIt, Char>>(arg),
+            arg);
         break;
       }
     }
@@ -591,10 +509,12 @@ OutputIt basic_printf_context<OutputIt, Char>::format() {
     start = it;
 
     // Format argument.
-    out = visit_format_arg(ArgFormatter(out, specs, *this), arg);
+    out = visit_format_arg(
+        detail::printf_arg_formatter<OutputIt, Char>(out, specs, context), arg);
   }
-  return std::copy(start, it, out);
+  detail::write(out, basic_string_view<Char>(start, to_unsigned(it - start)));
 }
+FMT_END_DETAIL_NAMESPACE
 
 template <typename Char>
 using basic_printf_context_t =
@@ -612,9 +532,9 @@ using wprintf_args = basic_format_args<wprintf_context>;
   arguments and can be implicitly converted to `~fmt::printf_args`.
   \endrst
  */
-template <typename... Args>
+template <typename... T>
-inline format_arg_store<printf_context, Args...> make_printf_args(
+inline auto make_printf_args(const T&... args)
-    const Args&... args) {
+    -> format_arg_store<printf_context, T...> {
   return {args...};
 }
 
@@ -624,18 +544,19 @@ inline format_arg_store<printf_context, Args...> make_printf_args(
   arguments and can be implicitly converted to `~fmt::wprintf_args`.
   \endrst
  */
-template <typename... Args>
+template <typename... T>
-inline format_arg_store<wprintf_context, Args...> make_wprintf_args(
+inline auto make_wprintf_args(const T&... args)
-    const Args&... args) {
+    -> format_arg_store<wprintf_context, T...> {
   return {args...};
 }
 
 template <typename S, typename Char = char_t<S>>
-inline std::basic_string<Char> vsprintf(
+inline auto vsprintf(
-    const S& format,
+    const S& fmt,
-    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args) {
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+    -> std::basic_string<Char> {
   basic_memory_buffer<Char> buffer;
-  vprintf(buffer, to_string_view(format), args);
+  vprintf(buffer, to_string_view(fmt), args);
   return to_string(buffer);
 }
 
@@ -648,19 +569,20 @@ inline std::basic_string<Char> vsprintf(
     std::string message = fmt::sprintf("The answer is %d", 42);
   \endrst
 */
-template <typename S, typename... Args,
+template <typename S, typename... T,
           typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
-inline std::basic_string<Char> sprintf(const S& format, const Args&... args) {
+inline auto sprintf(const S& fmt, const T&... args) -> std::basic_string<Char> {
   using context = basic_printf_context_t<Char>;
-  return vsprintf(to_string_view(format), make_format_args<context>(args...));
+  return vsprintf(to_string_view(fmt), fmt::make_format_args<context>(args...));
 }
 
 template <typename S, typename Char = char_t<S>>
-inline int vfprintf(
+inline auto vfprintf(
-    std::FILE* f, const S& format,
+    std::FILE* f, const S& fmt,
-    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args) {
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+    -> int {
   basic_memory_buffer<Char> buffer;
-  vprintf(buffer, to_string_view(format), args);
+  vprintf(buffer, to_string_view(fmt), args);
   size_t size = buffer.size();
   return std::fwrite(buffer.data(), sizeof(Char), size, f) < size
              ? -1
@@ -676,19 +598,19 @@ inline int vfprintf(
     fmt::fprintf(stderr, "Don't %s!", "panic");
   \endrst
  */
-template <typename S, typename... Args,
+template <typename S, typename... T, typename Char = char_t<S>>
-          typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
+inline auto fprintf(std::FILE* f, const S& fmt, const T&... args) -> int {
-inline int fprintf(std::FILE* f, const S& format, const Args&... args) {
   using context = basic_printf_context_t<Char>;
-  return vfprintf(f, to_string_view(format),
+  return vfprintf(f, to_string_view(fmt),
-                  make_format_args<context>(args...));
+                  fmt::make_format_args<context>(args...));
 }
 
 template <typename S, typename Char = char_t<S>>
-inline int vprintf(
+inline auto vprintf(
-    const S& format,
+    const S& fmt,
-    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args) {
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
-  return vfprintf(stdout, to_string_view(format), args);
+    -> int {
+  return vfprintf(stdout, to_string_view(fmt), args);
 }
 
 /**
@@ -700,52 +622,31 @@ inline int vprintf(
     fmt::printf("Elapsed time: %.2f seconds", 1.23);
   \endrst
  */
-template <typename S, typename... Args,
+template <typename S, typename... T, FMT_ENABLE_IF(detail::is_string<S>::value)>
-          FMT_ENABLE_IF(detail::is_string<S>::value)>
+inline auto printf(const S& fmt, const T&... args) -> int {
-inline int printf(const S& format_str, const Args&... args) {
+  return vprintf(
-  using context = basic_printf_context_t<char_t<S>>;
+      to_string_view(fmt),
-  return vprintf(to_string_view(format_str),
+      fmt::make_format_args<basic_printf_context_t<char_t<S>>>(args...));
-                 make_format_args<context>(args...));
 }
 
 template <typename S, typename Char = char_t<S>>
-inline int vfprintf(
+FMT_DEPRECATED auto vfprintf(
-    std::basic_ostream<Char>& os, const S& format,
+    std::basic_ostream<Char>& os, const S& fmt,
-    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args) {
+    basic_format_args<basic_printf_context_t<type_identity_t<Char>>> args)
+    -> int {
   basic_memory_buffer<Char> buffer;
-  vprintf(buffer, to_string_view(format), args);
+  vprintf(buffer, to_string_view(fmt), args);
-  detail::write_buffer(os, buffer);
+  os.write(buffer.data(), static_cast<std::streamsize>(buffer.size()));
   return static_cast<int>(buffer.size());
 }
-
+template <typename S, typename... T, typename Char = char_t<S>>
-/** Formats arguments and writes the output to the range. */
+FMT_DEPRECATED auto fprintf(std::basic_ostream<Char>& os, const S& fmt,
-template <typename ArgFormatter, typename Char,
+                            const T&... args) -> int {
-          typename Context =
+  return vfprintf(os, to_string_view(fmt),
-              basic_printf_context<typename ArgFormatter::iterator, Char>>
+                  fmt::make_format_args<basic_printf_context_t<Char>>(args...));
-typename ArgFormatter::iterator vprintf(
-    detail::buffer<Char>& out, basic_string_view<Char> format_str,
-    basic_format_args<type_identity_t<Context>> args) {
-  typename ArgFormatter::iterator iter(out);
-  Context(iter, format_str, args).template format<ArgFormatter>();
-  return iter;
 }
 
-/**
+FMT_MODULE_EXPORT_END
-  \rst
-  Prints formatted data to the stream *os*.
-
-  **Example**::
-
-    fmt::fprintf(cerr, "Don't %s!", "panic");
-  \endrst
- */
-template <typename S, typename... Args, typename Char = char_t<S>>
-inline int fprintf(std::basic_ostream<Char>& os, const S& format_str,
-                   const Args&... args) {
-  using context = basic_printf_context_t<Char>;
-  return vfprintf(os, to_string_view(format_str),
-                  make_format_args<context>(args...));
-}
 FMT_END_NAMESPACE
 
 #endif  // FMT_PRINTF_H_

include/spdlog/fmt/bundled/ranges.h

@@ -17,41 +17,31 @@
 
 #include "format.h"
 
-// output only up to N items from the range.
-#ifndef FMT_RANGE_OUTPUT_LENGTH_LIMIT
-#  define FMT_RANGE_OUTPUT_LENGTH_LIMIT 256
-#endif
-
 FMT_BEGIN_NAMESPACE
 
-template <typename Char> struct formatting_base {
+template <typename Char, typename Enable = void> struct formatting_range {
+#ifdef FMT_DEPRECATED_BRACED_RANGES
+  Char prefix = '{';
+  Char postfix = '}';
+#else
+  Char prefix = '[';
+  Char postfix = ']';
+#endif
+
   template <typename ParseContext>
   FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
     return ctx.begin();
   }
 };
 
-template <typename Char, typename Enable = void>
+template <typename Char, typename Enable = void> struct formatting_tuple {
-struct formatting_range : formatting_base<Char> {
+  Char prefix = '(';
-  static FMT_CONSTEXPR_DECL const size_t range_length_limit =
+  Char postfix = ')';
-      FMT_RANGE_OUTPUT_LENGTH_LIMIT;  // output only up to N items from the
-                                      // range.
-  Char prefix;
-  Char delimiter;
-  Char postfix;
-  formatting_range() : prefix('{'), delimiter(','), postfix('}') {}
-  static FMT_CONSTEXPR_DECL const bool add_delimiter_spaces = true;
-  static FMT_CONSTEXPR_DECL const bool add_prepostfix_space = false;
-};
 
-template <typename Char, typename Enable = void>
+  template <typename ParseContext>
-struct formatting_tuple : formatting_base<Char> {
+  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-  Char prefix;
+    return ctx.begin();
-  Char delimiter;
+  }
-  Char postfix;
-  formatting_tuple() : prefix('('), delimiter(','), postfix(')') {}
-  static FMT_CONSTEXPR_DECL const bool add_delimiter_spaces = true;
-  static FMT_CONSTEXPR_DECL const bool add_prepostfix_space = false;
 };
 
 namespace detail {
@@ -75,8 +65,14 @@ OutputIterator copy(char ch, OutputIterator out) {
   return out;
 }
 
+template <typename OutputIterator>
+OutputIterator copy(wchar_t ch, OutputIterator out) {
+  *out++ = ch;
+  return out;
+}
+
 /// Return true value if T has std::string interface, like std::string_view.
-template <typename T> class is_like_std_string {
+template <typename T> class is_std_string_like {
   template <typename U>
   static auto check(U* p)
       -> decltype((void)p->find('a'), p->length(), (void)p->data(), int());
@@ -88,19 +84,107 @@ template <typename T> class is_like_std_string {
 };
 
 template <typename Char>
-struct is_like_std_string<fmt::basic_string_view<Char>> : std::true_type {};
+struct is_std_string_like<fmt::basic_string_view<Char>> : std::true_type {};
 
 template <typename... Ts> struct conditional_helper {};
 
 template <typename T, typename _ = void> struct is_range_ : std::false_type {};
 
 #if !FMT_MSC_VER || FMT_MSC_VER > 1800
+
+#  define FMT_DECLTYPE_RETURN(val)  \
+    ->decltype(val) { return val; } \
+    static_assert(                  \
+        true, "")  // This makes it so that a semicolon is required after the
+                   // macro, which helps clang-format handle the formatting.
+
+// C array overload
+template <typename T, std::size_t N>
+auto range_begin(const T (&arr)[N]) -> const T* {
+  return arr;
+}
+template <typename T, std::size_t N>
+auto range_end(const T (&arr)[N]) -> const T* {
+  return arr + N;
+}
+
+template <typename T, typename Enable = void>
+struct has_member_fn_begin_end_t : std::false_type {};
+
 template <typename T>
-struct is_range_<
+struct has_member_fn_begin_end_t<T, void_t<decltype(std::declval<T>().begin()),
-    T, conditional_t<false,
+                                           decltype(std::declval<T>().end())>>
-                     conditional_helper<decltype(std::declval<T>().begin()),
+    : std::true_type {};
-                                        decltype(std::declval<T>().end())>,
+
-                     void>> : std::true_type {};
+// Member function overload
+template <typename T>
+auto range_begin(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).begin());
+template <typename T>
+auto range_end(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).end());
+
+// ADL overload. Only participates in overload resolution if member functions
+// are not found.
+template <typename T>
+auto range_begin(T&& rng)
+    -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
+                   decltype(begin(static_cast<T&&>(rng)))> {
+  return begin(static_cast<T&&>(rng));
+}
+template <typename T>
+auto range_end(T&& rng) -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
+                                       decltype(end(static_cast<T&&>(rng)))> {
+  return end(static_cast<T&&>(rng));
+}
+
+template <typename T, typename Enable = void>
+struct has_const_begin_end : std::false_type {};
+template <typename T, typename Enable = void>
+struct has_mutable_begin_end : std::false_type {};
+
+template <typename T>
+struct has_const_begin_end<
+    T, void_t<decltype(detail::range_begin(
+                  std::declval<const remove_cvref_t<T>&>())),
+              decltype(detail::range_begin(
+                  std::declval<const remove_cvref_t<T>&>()))>>
+    : std::true_type {};
+
+template <typename T>
+struct has_mutable_begin_end<
+    T, void_t<decltype(detail::range_begin(std::declval<T>())),
+              decltype(detail::range_begin(std::declval<T>())),
+              enable_if_t<std::is_copy_constructible<T>::value>>>
+    : std::true_type {};
+
+template <typename T>
+struct is_range_<T, void>
+    : std::integral_constant<bool, (has_const_begin_end<T>::value ||
+                                    has_mutable_begin_end<T>::value)> {};
+
+template <typename T, typename Enable = void> struct range_to_view;
+template <typename T>
+struct range_to_view<T, enable_if_t<has_const_begin_end<T>::value>> {
+  struct view_t {
+    const T* m_range_ptr;
+
+    auto begin() const FMT_DECLTYPE_RETURN(detail::range_begin(*m_range_ptr));
+    auto end() const FMT_DECLTYPE_RETURN(detail::range_end(*m_range_ptr));
+  };
+  static auto view(const T& range) -> view_t { return {&range}; }
+};
+
+template <typename T>
+struct range_to_view<T, enable_if_t<!has_const_begin_end<T>::value &&
+                                    has_mutable_begin_end<T>::value>> {
+  struct view_t {
+    T m_range_copy;
+
+    auto begin() FMT_DECLTYPE_RETURN(detail::range_begin(m_range_copy));
+    auto end() FMT_DECLTYPE_RETURN(detail::range_end(m_range_copy));
+  };
+  static auto view(const T& range) -> view_t { return {range}; }
+};
+#  undef FMT_DECLTYPE_RETURN
 #endif
 
 /// tuple_size and tuple_element check.
@@ -158,33 +242,42 @@ template <class Tuple, class F> void for_each(Tuple&& tup, F&& f) {
 }
 
 template <typename Range>
-using value_type = remove_cvref_t<decltype(*std::declval<Range>().begin())>;
+using value_type =
+    remove_cvref_t<decltype(*detail::range_begin(std::declval<Range>()))>;
 
-template <typename Arg, FMT_ENABLE_IF(!is_like_std_string<
+template <typename OutputIt> OutputIt write_delimiter(OutputIt out) {
-                                      typename std::decay<Arg>::type>::value)>
+  *out++ = ',';
-FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const Arg&) {
+  *out++ = ' ';
-  return add_space ? " {}" : "{}";
+  return out;
 }
 
-template <typename Arg, FMT_ENABLE_IF(is_like_std_string<
+template <
-                                      typename std::decay<Arg>::type>::value)>
+    typename Char, typename OutputIt, typename Arg,
-FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const Arg&) {
+    FMT_ENABLE_IF(is_std_string_like<typename std::decay<Arg>::type>::value)>
-  return add_space ? " \"{}\"" : "\"{}\"";
+OutputIt write_range_entry(OutputIt out, const Arg& v) {
+  *out++ = '"';
+  out = write<Char>(out, v);
+  *out++ = '"';
+  return out;
 }
 
-FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const char*) {
+template <typename Char, typename OutputIt, typename Arg,
-  return add_space ? " \"{}\"" : "\"{}\"";
+          FMT_ENABLE_IF(std::is_same<Arg, Char>::value)>
-}
+OutputIt write_range_entry(OutputIt out, const Arg v) {
-FMT_CONSTEXPR const wchar_t* format_str_quoted(bool add_space, const wchar_t*) {
+  *out++ = '\'';
-  return add_space ? L" \"{}\"" : L"\"{}\"";
+  *out++ = v;
+  *out++ = '\'';
+  return out;
 }
 
-FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const char) {
+template <
-  return add_space ? " '{}'" : "'{}'";
+    typename Char, typename OutputIt, typename Arg,
-}
+    FMT_ENABLE_IF(!is_std_string_like<typename std::decay<Arg>::type>::value &&
-FMT_CONSTEXPR const wchar_t* format_str_quoted(bool add_space, const wchar_t) {
+                  !std::is_same<Arg, Char>::value)>
-  return add_space ? L" '{}'" : L"'{}'";
+OutputIt write_range_entry(OutputIt out, const Arg& v) {
+  return write<Char>(out, v);
 }
+
 }  // namespace detail
 
 template <typename T> struct is_tuple_like {
@@ -198,23 +291,14 @@ struct formatter<TupleT, Char, enable_if_t<fmt::is_tuple_like<TupleT>::value>> {
   // C++11 generic lambda for format()
   template <typename FormatContext> struct format_each {
     template <typename T> void operator()(const T& v) {
-      if (i > 0) {
+      if (i > 0) out = detail::write_delimiter(out);
-        if (formatting.add_prepostfix_space) {
+      out = detail::write_range_entry<Char>(out, v);
-          *out++ = ' ';
-        }
-        out = detail::copy(formatting.delimiter, out);
-      }
-      out = format_to(out,
-                      detail::format_str_quoted(
-                          (formatting.add_delimiter_spaces && i > 0), v),
-                      v);
       ++i;
     }
-
     formatting_tuple<Char>& formatting;
     size_t& i;
-    typename std::add_lvalue_reference<decltype(
+    typename std::add_lvalue_reference<
-        std::declval<FormatContext>().out())>::type out;
+        decltype(std::declval<FormatContext>().out())>::type out;
   };
 
  public:
@@ -229,12 +313,9 @@ struct formatter<TupleT, Char, enable_if_t<fmt::is_tuple_like<TupleT>::value>> {
   auto format(const TupleT& values, FormatContext& ctx) -> decltype(ctx.out()) {
     auto out = ctx.out();
     size_t i = 0;
-    detail::copy(formatting.prefix, out);
 
+    detail::copy(formatting.prefix, out);
     detail::for_each(values, format_each<FormatContext>{formatting, i, out});
-    if (formatting.add_prepostfix_space) {
-      *out++ = ' ';
-    }
     detail::copy(formatting.postfix, out);
 
     return ctx.out();
@@ -243,7 +324,7 @@ struct formatter<TupleT, Char, enable_if_t<fmt::is_tuple_like<TupleT>::value>> {
 
 template <typename T, typename Char> struct is_range {
   static FMT_CONSTEXPR_DECL const bool value =
-      detail::is_range_<T>::value && !detail::is_like_std_string<T>::value &&
+      detail::is_range_<T>::value && !detail::is_std_string_like<T>::value &&
       !std::is_convertible<T, std::basic_string<Char>>::value &&
       !std::is_constructible<detail::std_string_view<Char>, T>::value;
 };
@@ -251,15 +332,14 @@ template <typename T, typename Char> struct is_range {
 template <typename T, typename Char>
 struct formatter<
     T, Char,
-    enable_if_t<fmt::is_range<T, Char>::value
+    enable_if_t<
+        fmt::is_range<T, Char>::value
 // Workaround a bug in MSVC 2017 and earlier.
 #if !FMT_MSC_VER || FMT_MSC_VER >= 1927
-                &&
+        && (has_formatter<detail::value_type<T>, format_context>::value ||
-                (has_formatter<detail::value_type<T>, format_context>::value ||
+            detail::has_fallback_formatter<detail::value_type<T>, Char>::value)
-                 detail::has_fallback_formatter<detail::value_type<T>,
-                                                format_context>::value)
 #endif
-                >> {
+        >> {
   formatting_range<Char> formatting;
 
   template <typename ParseContext>
@@ -271,71 +351,65 @@ struct formatter<
   typename FormatContext::iterator format(const T& values, FormatContext& ctx) {
     auto out = detail::copy(formatting.prefix, ctx.out());
     size_t i = 0;
-    auto it = values.begin();
+    auto view = detail::range_to_view<T>::view(values);
-    auto end = values.end();
+    auto it = view.begin();
+    auto end = view.end();
     for (; it != end; ++it) {
-      if (i > 0) {
+      if (i > 0) out = detail::write_delimiter(out);
-        if (formatting.add_prepostfix_space) *out++ = ' ';
+      out = detail::write_range_entry<Char>(out, *it);
-        out = detail::copy(formatting.delimiter, out);
+      ++i;
-      }
-      out = format_to(out,
-                      detail::format_str_quoted(
-                          (formatting.add_delimiter_spaces && i > 0), *it),
-                      *it);
-      if (++i > formatting.range_length_limit) {
-        out = format_to(out, " ... <other elements>");
-        break;
-      }
     }
-    if (formatting.add_prepostfix_space) *out++ = ' ';
     return detail::copy(formatting.postfix, out);
   }
 };
 
-template <typename Char, typename... T> struct tuple_arg_join : detail::view {
+template <typename Char, typename... T> struct tuple_join_view : detail::view {
   const std::tuple<T...>& tuple;
   basic_string_view<Char> sep;
 
-  tuple_arg_join(const std::tuple<T...>& t, basic_string_view<Char> s)
+  tuple_join_view(const std::tuple<T...>& t, basic_string_view<Char> s)
-      : tuple{t}, sep{s} {}
+      : tuple(t), sep{s} {}
 };
 
 template <typename Char, typename... T>
-struct formatter<tuple_arg_join<Char, T...>, Char> {
+using tuple_arg_join = tuple_join_view<Char, T...>;
+
+template <typename Char, typename... T>
+struct formatter<tuple_join_view<Char, T...>, Char> {
   template <typename ParseContext>
   FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
     return ctx.begin();
   }
 
   template <typename FormatContext>
-  typename FormatContext::iterator format(
+  auto format(const tuple_join_view<Char, T...>& value, FormatContext& ctx) ->
-      const tuple_arg_join<Char, T...>& value, FormatContext& ctx) {
+      typename FormatContext::iterator {
     return format(value, ctx, detail::make_index_sequence<sizeof...(T)>{});
   }
 
  private:
   template <typename FormatContext, size_t... N>
-  typename FormatContext::iterator format(
+  auto format(const tuple_join_view<Char, T...>& value, FormatContext& ctx,
-      const tuple_arg_join<Char, T...>& value, FormatContext& ctx,
+              detail::index_sequence<N...>) ->
-      detail::index_sequence<N...>) {
+      typename FormatContext::iterator {
-    return format_args(value, ctx, std::get<N>(value.tuple)...);
+    using std::get;
+    return format_args(value, ctx, get<N>(value.tuple)...);
   }
 
   template <typename FormatContext>
-  typename FormatContext::iterator format_args(
+  auto format_args(const tuple_join_view<Char, T...>&, FormatContext& ctx) ->
-      const tuple_arg_join<Char, T...>&, FormatContext& ctx) {
+      typename FormatContext::iterator {
     // NOTE: for compilers that support C++17, this empty function instantiation
     // can be replaced with a constexpr branch in the variadic overload.
     return ctx.out();
   }
 
   template <typename FormatContext, typename Arg, typename... Args>
-  typename FormatContext::iterator format_args(
+  auto format_args(const tuple_join_view<Char, T...>& value, FormatContext& ctx,
-      const tuple_arg_join<Char, T...>& value, FormatContext& ctx,
+                   const Arg& arg, const Args&... args) ->
-      const Arg& arg, const Args&... args) {
+      typename FormatContext::iterator {
     using base = formatter<typename std::decay<Arg>::type, Char>;
-    auto out = ctx.out();
+    auto out = base().format(arg, ctx);
-    out = base{}.format(arg, ctx);
     if (sizeof...(Args) > 0) {
       out = std::copy(value.sep.begin(), value.sep.end(), out);
       ctx.advance_to(out);
@@ -345,6 +419,8 @@ struct formatter<tuple_arg_join<Char, T...>, Char> {
   }
 };
 
+FMT_MODULE_EXPORT_BEGIN
+
 /**
   \rst
   Returns an object that formats `tuple` with elements separated by `sep`.
@@ -357,14 +433,15 @@ struct formatter<tuple_arg_join<Char, T...>, Char> {
   \endrst
  */
 template <typename... T>
-FMT_CONSTEXPR tuple_arg_join<char, T...> join(const std::tuple<T...>& tuple,
+FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple, string_view sep)
-                                              string_view sep) {
+    -> tuple_join_view<char, T...> {
   return {tuple, sep};
 }
 
 template <typename... T>
-FMT_CONSTEXPR tuple_arg_join<wchar_t, T...> join(const std::tuple<T...>& tuple,
+FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple,
-                                                 wstring_view sep) {
+                        basic_string_view<wchar_t> sep)
+    -> tuple_join_view<wchar_t, T...> {
   return {tuple, sep};
 }
 
@@ -380,17 +457,12 @@ FMT_CONSTEXPR tuple_arg_join<wchar_t, T...> join(const std::tuple<T...>& tuple,
   \endrst
  */
 template <typename T>
-arg_join<const T*, const T*, char> join(std::initializer_list<T> list,
+auto join(std::initializer_list<T> list, string_view sep)
-                                        string_view sep) {
+    -> join_view<const T*, const T*> {
-  return join(std::begin(list), std::end(list), sep);
-}
-
-template <typename T>
-arg_join<const T*, const T*, wchar_t> join(std::initializer_list<T> list,
-                                           wstring_view sep) {
   return join(std::begin(list), std::end(list), sep);
 }
 
+FMT_MODULE_EXPORT_END
 FMT_END_NAMESPACE
 
 #endif  // FMT_RANGES_H_

include/spdlog/fmt/bundled/xchar.h

@@ -0,0 +1,236 @@
+// Formatting library for C++ - optional wchar_t and exotic character support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_WCHAR_H_
+#define FMT_WCHAR_H_
+
+#include <cwchar>
+#include <tuple>
+
+#include "format.h"
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+template <typename T>
+using is_exotic_char = bool_constant<!std::is_same<T, char>::value>;
+}
+
+FMT_MODULE_EXPORT_BEGIN
+
+using wstring_view = basic_string_view<wchar_t>;
+using wformat_parse_context = basic_format_parse_context<wchar_t>;
+using wformat_context = buffer_context<wchar_t>;
+using wformat_args = basic_format_args<wformat_context>;
+using wmemory_buffer = basic_memory_buffer<wchar_t>;
+
+#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
+// Workaround broken conversion on older gcc.
+template <typename... Args> using wformat_string = wstring_view;
+#else
+template <typename... Args>
+using wformat_string = basic_format_string<wchar_t, type_identity_t<Args>...>;
+#endif
+
+template <> struct is_char<wchar_t> : std::true_type {};
+template <> struct is_char<detail::char8_type> : std::true_type {};
+template <> struct is_char<char16_t> : std::true_type {};
+template <> struct is_char<char32_t> : std::true_type {};
+
+template <typename... Args>
+constexpr format_arg_store<wformat_context, Args...> make_wformat_args(
+    const Args&... args) {
+  return {args...};
+}
+
+inline namespace literals {
+constexpr auto operator"" _format(const wchar_t* s, size_t n)
+    -> detail::udl_formatter<wchar_t> {
+  return {{s, n}};
+}
+
+#if FMT_USE_USER_DEFINED_LITERALS && !FMT_USE_NONTYPE_TEMPLATE_PARAMETERS
+constexpr detail::udl_arg<wchar_t> operator"" _a(const wchar_t* s, size_t) {
+  return {s};
+}
+#endif
+}  // namespace literals
+
+template <typename It, typename Sentinel>
+auto join(It begin, Sentinel end, wstring_view sep)
+    -> join_view<It, Sentinel, wchar_t> {
+  return {begin, end, sep};
+}
+
+template <typename Range>
+auto join(Range&& range, wstring_view sep)
+    -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>,
+                 wchar_t> {
+  return join(std::begin(range), std::end(range), sep);
+}
+
+template <typename T>
+auto join(std::initializer_list<T> list, wstring_view sep)
+    -> join_view<const T*, const T*, wchar_t> {
+  return join(std::begin(list), std::end(list), sep);
+}
+
+template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+auto vformat(basic_string_view<Char> format_str,
+             basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> std::basic_string<Char> {
+  basic_memory_buffer<Char> buffer;
+  detail::vformat_to(buffer, format_str, args);
+  return to_string(buffer);
+}
+
+// Pass char_t as a default template parameter instead of using
+// std::basic_string<char_t<S>> to reduce the symbol size.
+template <typename S, typename... Args, typename Char = char_t<S>,
+          FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
+auto format(const S& format_str, Args&&... args) -> std::basic_string<Char> {
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+  return vformat(to_string_view(format_str), vargs);
+}
+
+template <typename Locale, typename S, typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto vformat(
+    const Locale& loc, const S& format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> std::basic_string<Char> {
+  return detail::vformat(loc, to_string_view(format_str), args);
+}
+
+template <typename Locale, typename S, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto format(const Locale& loc, const S& format_str, Args&&... args)
+    -> std::basic_string<Char> {
+  return detail::vformat(loc, to_string_view(format_str),
+                         fmt::make_args_checked<Args...>(format_str, args...));
+}
+
+template <typename OutputIt, typename S, typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+auto vformat_to(OutputIt out, const S& format_str,
+                basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> OutputIt {
+  auto&& buf = detail::get_buffer<Char>(out);
+  detail::vformat_to(buf, to_string_view(format_str), args);
+  return detail::get_iterator(buf);
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto format_to(OutputIt out, const S& fmt, Args&&... args) -> OutputIt {
+  const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...);
+  return vformat_to(out, to_string_view(fmt), vargs);
+}
+
+template <typename S, typename... Args, typename Char, size_t SIZE,
+          typename Allocator, FMT_ENABLE_IF(detail::is_string<S>::value)>
+FMT_DEPRECATED auto format_to(basic_memory_buffer<Char, SIZE, Allocator>& buf,
+                              const S& format_str, Args&&... args) ->
+    typename buffer_context<Char>::iterator {
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+  detail::vformat_to(buf, to_string_view(format_str), vargs, {});
+  return detail::buffer_appender<Char>(buf);
+}
+
+template <typename Locale, typename S, typename OutputIt, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_locale<Locale>::value&&
+                                detail::is_exotic_char<Char>::value)>
+inline auto vformat_to(
+    OutputIt out, const Locale& loc, const S& format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args) -> OutputIt {
+  auto&& buf = detail::get_buffer<Char>(out);
+  vformat_to(buf, to_string_view(format_str), args, detail::locale_ref(loc));
+  return detail::get_iterator(buf);
+}
+
+template <
+    typename OutputIt, typename Locale, typename S, typename... Args,
+    typename Char = char_t<S>,
+    bool enable = detail::is_output_iterator<OutputIt, Char>::value&&
+        detail::is_locale<Locale>::value&& detail::is_exotic_char<Char>::value>
+inline auto format_to(OutputIt out, const Locale& loc, const S& format_str,
+                      Args&&... args) ->
+    typename std::enable_if<enable, OutputIt>::type {
+  const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...);
+  return vformat_to(out, loc, to_string_view(format_str), vargs);
+}
+
+template <typename OutputIt, typename Char, typename... Args,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto vformat_to_n(
+    OutputIt out, size_t n, basic_string_view<Char> format_str,
+    basic_format_args<buffer_context<type_identity_t<Char>>> args)
+    -> format_to_n_result<OutputIt> {
+  detail::iterator_buffer<OutputIt, Char, detail::fixed_buffer_traits> buf(out,
+                                                                           n);
+  detail::vformat_to(buf, format_str, args);
+  return {buf.out(), buf.count()};
+}
+
+template <typename OutputIt, typename S, typename... Args,
+          typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
+                            detail::is_exotic_char<Char>::value)>
+inline auto format_to_n(OutputIt out, size_t n, const S& fmt,
+                        const Args&... args) -> format_to_n_result<OutputIt> {
+  const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...);
+  return vformat_to_n(out, n, to_string_view(fmt), vargs);
+}
+
+template <typename S, typename... Args, typename Char = char_t<S>,
+          FMT_ENABLE_IF(detail::is_exotic_char<Char>::value)>
+inline auto formatted_size(const S& fmt, Args&&... args) -> size_t {
+  detail::counting_buffer<Char> buf;
+  const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...);
+  detail::vformat_to(buf, to_string_view(fmt), vargs);
+  return buf.count();
+}
+
+inline void vprint(std::FILE* f, wstring_view fmt, wformat_args args) {
+  wmemory_buffer buffer;
+  detail::vformat_to(buffer, fmt, args);
+  buffer.push_back(L'\0');
+  if (std::fputws(buffer.data(), f) == -1)
+    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
+}
+
+inline void vprint(wstring_view fmt, wformat_args args) {
+  vprint(stdout, fmt, args);
+}
+
+template <typename... T>
+void print(std::FILE* f, wformat_string<T...> fmt, T&&... args) {
+  return vprint(f, wstring_view(fmt), make_wformat_args(args...));
+}
+
+template <typename... T> void print(wformat_string<T...> fmt, T&&... args) {
+  return vprint(wstring_view(fmt), make_wformat_args(args...));
+}
+
+/**
+  Converts *value* to ``std::wstring`` using the default format for type *T*.
+ */
+template <typename T> inline auto to_wstring(const T& value) -> std::wstring {
+  return format(FMT_STRING(L"{}"), value);
+}
+FMT_MODULE_EXPORT_END
+FMT_END_NAMESPACE
+
+#endif  // FMT_WCHAR_H_

include/spdlog/fmt/chrono.h

@@ -9,12 +9,12 @@
 //
 
 #if !defined(SPDLOG_FMT_EXTERNAL)
-#ifdef SPDLOG_HEADER_ONLY
+#    ifdef SPDLOG_HEADER_ONLY
-#ifndef FMT_HEADER_ONLY
+#        ifndef FMT_HEADER_ONLY
-#define FMT_HEADER_ONLY
+#            define FMT_HEADER_ONLY
-#endif
+#        endif
-#endif
+#    endif
-#include <spdlog/fmt/bundled/chrono.h>
+#    include <spdlog/fmt/bundled/chrono.h>
 #else
-#include <fmt/chrono.h>
+#    include <fmt/chrono.h>
 #endif

include/spdlog/fmt/compile.h

@@ -0,0 +1,20 @@
+//
+// Copyright(c) 2016 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+//
+// include bundled or external copy of fmtlib's ostream support
+//
+
+#if !defined(SPDLOG_FMT_EXTERNAL)
+#    ifdef SPDLOG_HEADER_ONLY
+#        ifndef FMT_HEADER_ONLY
+#            define FMT_HEADER_ONLY
+#        endif
+#    endif
+#    include <spdlog/fmt/bundled/compile.h>
+#else
+#    include <fmt/compile.h>
+#endif

include/spdlog/fmt/fmt.h

@@ -11,17 +11,17 @@
 //
 
 #if !defined(SPDLOG_FMT_EXTERNAL)
-#if !defined(SPDLOG_COMPILED_LIB) && !defined(FMT_HEADER_ONLY)
+#    if !defined(SPDLOG_COMPILED_LIB) && !defined(FMT_HEADER_ONLY)
-#define FMT_HEADER_ONLY
+#        define FMT_HEADER_ONLY
-#endif
+#    endif
-#ifndef FMT_USE_WINDOWS_H
+#    ifndef FMT_USE_WINDOWS_H
-#define FMT_USE_WINDOWS_H 0
+#        define FMT_USE_WINDOWS_H 0
-#endif
+#    endif
 // enable the 'n' flag in for backward compatibility with fmt 6.x
-#define FMT_DEPRECATED_N_SPECIFIER
+#    define FMT_DEPRECATED_N_SPECIFIER
-#include <spdlog/fmt/bundled/core.h>
+#    include <spdlog/fmt/bundled/core.h>
-#include <spdlog/fmt/bundled/format.h>
+#    include <spdlog/fmt/bundled/format.h>
 #else // SPDLOG_FMT_EXTERNAL is defined - use external fmtlib
-#include <fmt/core.h>
+#    include <fmt/core.h>
-#include <fmt/format.h>
+#    include <fmt/format.h>
-#endif
+#endif

include/spdlog/fmt/ostr.h

@@ -9,12 +9,12 @@
 //
 
 #if !defined(SPDLOG_FMT_EXTERNAL)
-#ifdef SPDLOG_HEADER_ONLY
+#    ifdef SPDLOG_HEADER_ONLY
-#ifndef FMT_HEADER_ONLY
+#        ifndef FMT_HEADER_ONLY
-#define FMT_HEADER_ONLY
+#            define FMT_HEADER_ONLY
-#endif
+#        endif
-#endif
+#    endif
-#include <spdlog/fmt/bundled/ostream.h>
+#    include <spdlog/fmt/bundled/ostream.h>
 #else
-#include <fmt/ostream.h>
+#    include <fmt/ostream.h>
 #endif

include/spdlog/fmt/xchar.h

@@ -0,0 +1,20 @@
+//
+// Copyright(c) 2016 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+//
+// include bundled or external copy of fmtlib's ostream support
+//
+
+#if !defined(SPDLOG_FMT_EXTERNAL)
+#    ifdef SPDLOG_HEADER_ONLY
+#        ifndef FMT_HEADER_ONLY
+#            define FMT_HEADER_ONLY
+#        endif
+#    endif
+#    include <spdlog/fmt/bundled/xchar.h>
+#else
+#    include <fmt/xchar.h>
+#endif

include/spdlog/logger-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/logger.h>
+#    include <spdlog/logger.h>
 #endif
 
 #include <spdlog/sinks/sink.h>

include/spdlog/logger.h

@@ -19,22 +19,27 @@
 #include <spdlog/details/backtracer.h>
 
 #ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
-#include <spdlog/details/os.h>
+#    ifndef _WIN32
+#        error SPDLOG_WCHAR_TO_UTF8_SUPPORT only supported on windows
+#    endif
+#    include <spdlog/details/os.h>
 #endif
 
 #include <vector>
+
 #ifndef SPDLOG_NO_EXCEPTIONS
-#define SPDLOG_LOGGER_CATCH()                                                                                                              \
+#    define SPDLOG_LOGGER_CATCH()                                                                                                          \
-    catch (const std::exception &ex)                                                                                                       \
+        catch (const std::exception &ex)                                                                                                   \
-    {                                                                                                                                      \
+        {                                                                                                                                  \
-        err_handler_(ex.what());                                                                                                           \
+            err_handler_(ex.what());                                                                                                       \
-    }                                                                                                                                      \
+        }                                                                                                                                  \
-    catch (...)                                                                                                                            \
+        catch (...)                                                                                                                        \
-    {                                                                                                                                      \
+        {                                                                                                                                  \
-        err_handler_("Unknown exception in logger");                                                                                       \
+            err_handler_("Rethrowing unknown exception in logger");                                                                        \
-    }
+            throw;                                                                                                                         \
+        }
 #else
-#define SPDLOG_LOGGER_CATCH()
+#    define SPDLOG_LOGGER_CATCH()
 #endif
 
 namespace spdlog {
@@ -70,79 +75,42 @@ public:
     logger(const logger &other);
     logger(logger &&other) SPDLOG_NOEXCEPT;
     logger &operator=(logger other) SPDLOG_NOEXCEPT;
-
     void swap(spdlog::logger &other) SPDLOG_NOEXCEPT;
 
-    // FormatString is a type derived from fmt::compile_string
-    template<typename FormatString, typename std::enable_if<fmt::is_compile_string<FormatString>::value, int>::type = 0, typename... Args>
-    void log(source_loc loc, level::level_enum lvl, const FormatString &fmt, Args&&...args)
-    {
-        log_(loc, lvl, fmt, std::forward<Args>(args)...);
-    }
-
-    // FormatString is NOT a type derived from fmt::compile_string but is a string_view_t or can be implicitly converted to one
     template<typename... Args>
-    void log(source_loc loc, level::level_enum lvl, string_view_t fmt, Args&&...args)
+    void log(source_loc loc, level::level_enum lvl, fmt::format_string<Args...> fmt, Args &&...args)
     {
         log_(loc, lvl, fmt, std::forward<Args>(args)...);
     }
 
-    template<typename FormatString, typename... Args>
+    template<typename... Args>
-    void log(level::level_enum lvl, const FormatString &fmt, Args&&...args)
+    void log(level::level_enum lvl, fmt::format_string<Args...> fmt, Args &&...args)
     {
         log(source_loc{}, lvl, fmt, std::forward<Args>(args)...);
     }
 
-    template<typename FormatString, typename... Args>
-    void trace(const FormatString &fmt, Args&&...args)
-    {
-        log(level::trace, fmt, std::forward<Args>(args)...);
-    }
-
-    template<typename FormatString, typename... Args>
-    void debug(const FormatString &fmt, Args&&...args)
-    {
-        log(level::debug, fmt, std::forward<Args>(args)...);
-    }
-
-    template<typename FormatString, typename... Args>
-    void info(const FormatString &fmt, Args&&...args)
-    {
-        log(level::info, fmt, std::forward<Args>(args)...);
-    }
-
-    template<typename FormatString, typename... Args>
-    void warn(const FormatString &fmt, Args&&...args)
-    {
-        log(level::warn, fmt, std::forward<Args>(args)...);
-    }
-
-    template<typename FormatString, typename... Args>
-    void error(const FormatString &fmt, Args&&...args)
-    {
-        log(level::err, fmt, std::forward<Args>(args)...);
-    }
-
-    template<typename FormatString, typename... Args>
-    void critical(const FormatString &fmt, Args&&...args)
-    {
-        log(level::critical, fmt, std::forward<Args>(args)...);
-    }
-
     template<typename T>
     void log(level::level_enum lvl, const T &msg)
     {
         log(source_loc{}, lvl, msg);
     }
 
-    // T can be statically converted to string_view and isn't a fmt::compile_string
+    // T can be statically converted to string_view
-    template<class T, typename std::enable_if<
+    template<class T, typename std::enable_if<std::is_convertible<const T &, spdlog::string_view_t>::value, int>::type = 0>
-                          std::is_convertible<const T &, spdlog::string_view_t>::value && !fmt::is_compile_string<T>::value, int>::type = 0>
     void log(source_loc loc, level::level_enum lvl, const T &msg)
     {
         log(loc, lvl, string_view_t{msg});
     }
 
+    // T cannot be statically converted to neither string_view, nor wstring_view and nor format string
+    template<class T, typename std::enable_if<!std::is_convertible<const T &, spdlog::string_view_t>::value &&
+                                                  !is_convertible_to_basic_format_string<const T &>::value,
+                          int>::type = 0>
+    void log(source_loc loc, level::level_enum lvl, const T &msg)
+    {
+        log(loc, lvl, "{}", msg);
+    }
+
     void log(log_clock::time_point log_time, source_loc loc, level::level_enum lvl, string_view_t msg)
     {
         bool log_enabled = should_log(lvl);
@@ -174,15 +142,92 @@ public:
         log(source_loc{}, lvl, msg);
     }
 
-    // T cannot be statically converted to string_view or wstring_view
+    template<typename... Args>
-    template<class T, typename std::enable_if<!std::is_convertible<const T &, spdlog::string_view_t>::value &&
+    void trace(fmt::format_string<Args...> fmt, Args &&...args)
-                                                  !is_convertible_to_wstring_view<const T &>::value,
-                          int>::type = 0>
-    void log(source_loc loc, level::level_enum lvl, const T &msg)
     {
-        log(loc, lvl, "{}", msg);
+        log(level::trace, fmt, std::forward<Args>(args)...);
     }
 
+    template<typename... Args>
+    void debug(fmt::format_string<Args...> fmt, Args &&...args)
+    {
+        log(level::debug, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void info(fmt::format_string<Args...> fmt, Args &&...args)
+    {
+        log(level::info, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void warn(fmt::format_string<Args...> fmt, Args &&...args)
+    {
+        log(level::warn, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void error(fmt::format_string<Args...> fmt, Args &&...args)
+    {
+        log(level::err, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void critical(fmt::format_string<Args...> fmt, Args &&...args)
+    {
+        log(level::critical, fmt, std::forward<Args>(args)...);
+    }
+
+#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+    template<typename... Args>
+    void log(level::level_enum lvl, fmt::wformat_string<Args...> fmt, Args &&...args)
+    {
+        log(source_loc{}, lvl, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void log(source_loc loc, level::level_enum lvl, fmt::wformat_string<Args...> fmt, Args &&...args)
+    {
+        log_(loc, lvl, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void trace(fmt::wformat_string<Args...> fmt, Args &&...args)
+    {
+        log(level::trace, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void debug(fmt::wformat_string<Args...> fmt, Args &&...args)
+    {
+        log(level::debug, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void info(fmt::wformat_string<Args...> fmt, Args &&...args)
+    {
+        log(level::info, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void warn(fmt::wformat_string<Args...> fmt, Args &&...args)
+    {
+        log(level::warn, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void error(fmt::wformat_string<Args...> fmt, Args &&...args)
+    {
+        log(level::err, fmt, std::forward<Args>(args)...);
+    }
+
+    template<typename... Args>
+    void critical(fmt::wformat_string<Args...> fmt, Args &&...args)
+    {
+        log(level::critical, fmt, std::forward<Args>(args)...);
+    }
+#endif
+
     template<typename T>
     void trace(const T &msg)
     {
@@ -219,57 +264,6 @@ public:
         log(level::critical, msg);
     }
 
-#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
-#ifndef _WIN32
-#error SPDLOG_WCHAR_TO_UTF8_SUPPORT only supported on windows
-#else
-
-    template<typename... Args>
-    void log(source_loc loc, level::level_enum lvl, wstring_view_t fmt, Args&&...args)
-    {
-        bool log_enabled = should_log(lvl);
-        bool traceback_enabled = tracer_.enabled();
-        if (!log_enabled && !traceback_enabled)
-        {
-            return;
-        }
-        SPDLOG_TRY
-        {
-            // format to wmemory_buffer and convert to utf8
-            fmt::wmemory_buffer wbuf;
-            fmt::format_to(wbuf, fmt, std::forward<Args>(args)...);
-
-            memory_buf_t buf;
-            details::os::wstr_to_utf8buf(wstring_view_t(wbuf.data(), wbuf.size()), buf);
-            details::log_msg log_msg(loc, name_, lvl, string_view_t(buf.data(), buf.size()));
-            log_it_(log_msg, log_enabled, traceback_enabled);
-        }
-        SPDLOG_LOGGER_CATCH()
-    }
-
-    // T can be statically converted to wstring_view
-    template<class T, typename std::enable_if<is_convertible_to_wstring_view<const T &>::value, int>::type = 0>
-    void log(source_loc loc, level::level_enum lvl, const T &msg)
-    {
-        bool log_enabled = should_log(lvl);
-        bool traceback_enabled = tracer_.enabled();
-        if (!log_enabled && !traceback_enabled)
-        {
-            return;
-        }
-
-        SPDLOG_TRY
-        {
-            memory_buf_t buf;
-            details::os::wstr_to_utf8buf(msg, buf);
-            details::log_msg log_msg(loc, name_, lvl, string_view_t(buf.data(), buf.size()));
-            log_it_(log_msg, log_enabled, traceback_enabled);
-        }
-        SPDLOG_LOGGER_CATCH()
-    }
-#endif // _WIN32
-#endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
-
     // return true logging is enabled for the given level.
     bool should_log(level::level_enum msg_level) const
     {
@@ -325,8 +319,8 @@ protected:
     details::backtracer tracer_;
 
     // common implementation for after templated public api has been resolved
-    template<typename FormatString, typename... Args>
+    template<typename... Args>
-    void log_(source_loc loc, level::level_enum lvl, const FormatString &fmt, Args&&...args)
+    void log_(source_loc loc, level::level_enum lvl, string_view_t fmt, Args &&...args)
     {
         bool log_enabled = should_log(lvl);
         bool traceback_enabled = tracer_.enabled();
@@ -337,13 +331,58 @@ protected:
         SPDLOG_TRY
         {
             memory_buf_t buf;
-            fmt::format_to(buf, fmt, std::forward<Args>(args)...);
+            fmt::detail::vformat_to(buf, fmt, fmt::make_format_args(args...));
             details::log_msg log_msg(loc, name_, lvl, string_view_t(buf.data(), buf.size()));
             log_it_(log_msg, log_enabled, traceback_enabled);
         }
         SPDLOG_LOGGER_CATCH()
     }
 
+#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+    template<typename... Args>
+    void log_(source_loc loc, level::level_enum lvl, wstring_view_t fmt, Args &&...args)
+    {
+        bool log_enabled = should_log(lvl);
+        bool traceback_enabled = tracer_.enabled();
+        if (!log_enabled && !traceback_enabled)
+        {
+            return;
+        }
+        SPDLOG_TRY
+        {
+            // format to wmemory_buffer and convert to utf8
+            fmt::wmemory_buffer wbuf;
+            fmt::detail::vformat_to(wbuf, fmt, fmt::make_format_args<fmt::wformat_context>(args...));
+            memory_buf_t buf;
+            details::os::wstr_to_utf8buf(wstring_view_t(wbuf.data(), wbuf.size()), buf);
+            details::log_msg log_msg(loc, name_, lvl, string_view_t(buf.data(), buf.size()));
+            log_it_(log_msg, log_enabled, traceback_enabled);
+        }
+        SPDLOG_LOGGER_CATCH()
+    }
+
+    // T can be statically converted to wstring_view, and no formatting needed.
+    template<class T, typename std::enable_if<std::is_convertible<const T &, spdlog::wstring_view_t>::value, int>::type = 0>
+    void log_(source_loc loc, level::level_enum lvl, const T &msg)
+    {
+        bool log_enabled = should_log(lvl);
+        bool traceback_enabled = tracer_.enabled();
+        if (!log_enabled && !traceback_enabled)
+        {
+            return;
+        }
+        SPDLOG_TRY
+        {
+            memory_buf_t buf;
+            details::os::wstr_to_utf8buf(msg, buf);
+            details::log_msg log_msg(loc, name_, lvl, string_view_t(buf.data(), buf.size()));
+            log_it_(log_msg, log_enabled, traceback_enabled);
+        }
+        SPDLOG_LOGGER_CATCH()
+    }
+
+#endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
+
     // log the given message (if the given log level is high enough),
     // and save backtrace (if backtrace is enabled).
     void log_it_(const details::log_msg &log_msg, bool log_enabled, bool traceback_enabled);
@@ -362,5 +401,5 @@ void swap(logger &a, logger &b);
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "logger-inl.h"
+#    include "logger-inl.h"
 #endif

include/spdlog/pattern_formatter-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/pattern_formatter.h>
+#    include <spdlog/pattern_formatter.h>
 #endif
 
 #include <spdlog/details/fmt_helper.h>
@@ -817,9 +817,9 @@ public:
     {}
 
 #ifdef _MSC_VER
-#pragma warning(push)
+#    pragma warning(push)
-#pragma warning(disable : 4127) // consider using 'if constexpr' instead
+#    pragma warning(disable : 4127) // consider using 'if constexpr' instead
-#endif // _MSC_VER
+#endif                              // _MSC_VER
     static const char *basename(const char *filename)
     {
         // if the size is 2 (1 character + null terminator) we can use the more efficient strrchr
@@ -831,15 +831,15 @@ public:
         }
         else
         {
-            const std::reverse_iterator<const char*> begin(filename + std::strlen(filename));
+            const std::reverse_iterator<const char *> begin(filename + std::strlen(filename));
-            const std::reverse_iterator<const char*> end(filename);
+            const std::reverse_iterator<const char *> end(filename);
 
             const auto it = std::find_first_of(begin, end, std::begin(os::folder_seps), std::end(os::folder_seps) - 1);
             return it != end ? it.base() : filename;
         }
     }
 #ifdef _MSC_VER
-#pragma warning(pop)
+#    pragma warning(pop)
 #endif // _MSC_VER
 
     void format(const details::log_msg &msg, const std::tm &, memory_buf_t &dest) override
@@ -925,7 +925,7 @@ private:
 };
 
 // Full info formatter
-// pattern: [%Y-%m-%d %H:%M:%S.%e] [%n] [%l] %v
+// pattern: [%Y-%m-%d %H:%M:%S.%e] [%n] [%l] [%s:%#] %v
 class full_formatter final : public flag_formatter
 {
 public:

include/spdlog/pattern_formatter.h

@@ -92,7 +92,7 @@ public:
     void format(const details::log_msg &msg, memory_buf_t &dest) override;
 
     template<typename T, typename... Args>
-    pattern_formatter &add_flag(char flag, Args&&...args)
+    pattern_formatter &add_flag(char flag, Args &&...args)
     {
         custom_handlers_[flag] = details::make_unique<T>(std::forward<Args>(args)...);
         return *this;
@@ -122,5 +122,5 @@ private:
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "pattern_formatter-inl.h"
+#    include "pattern_formatter-inl.h"
 #endif

include/spdlog/sinks/android_sink.h

@@ -5,21 +5,21 @@
 
 #ifdef __ANDROID__
 
-#include <spdlog/details/fmt_helper.h>
+#    include <spdlog/details/fmt_helper.h>
-#include <spdlog/details/null_mutex.h>
+#    include <spdlog/details/null_mutex.h>
-#include <spdlog/details/os.h>
+#    include <spdlog/details/os.h>
-#include <spdlog/sinks/base_sink.h>
+#    include <spdlog/sinks/base_sink.h>
-#include <spdlog/details/synchronous_factory.h>
+#    include <spdlog/details/synchronous_factory.h>
 
-#include <android/log.h>
+#    include <android/log.h>
-#include <chrono>
+#    include <chrono>
-#include <mutex>
+#    include <mutex>
-#include <string>
+#    include <string>
-#include <thread>
+#    include <thread>
 
-#if !defined(SPDLOG_ANDROID_RETRIES)
+#    if !defined(SPDLOG_ANDROID_RETRIES)
-#define SPDLOG_ANDROID_RETRIES 2
+#        define SPDLOG_ANDROID_RETRIES 2
-#endif
+#    endif
 
 namespace spdlog {
 namespace sinks {

include/spdlog/sinks/ansicolor_sink-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/sinks/ansicolor_sink.h>
+#    include <spdlog/sinks/ansicolor_sink.h>
 #endif
 
 #include <spdlog/pattern_formatter.h>

include/spdlog/sinks/ansicolor_sink.h

@@ -114,5 +114,5 @@ using ansicolor_stderr_sink_st = ansicolor_stderr_sink<details::console_nullmute
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "ansicolor_sink-inl.h"
+#    include "ansicolor_sink-inl.h"
 #endif

include/spdlog/sinks/base_sink-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/sinks/base_sink.h>
+#    include <spdlog/sinks/base_sink.h>
 #endif
 
 #include <spdlog/common.h>

include/spdlog/sinks/base_sink.h

@@ -37,7 +37,7 @@ public:
 protected:
     // sink formatter
     std::unique_ptr<spdlog::formatter> formatter_;
-    Mutex mutex_;
+    mutable Mutex mutex_;
 
     virtual void sink_it_(const details::log_msg &msg) = 0;
     virtual void flush_() = 0;
@@ -48,5 +48,5 @@ protected:
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "base_sink-inl.h"
+#    include "base_sink-inl.h"
 #endif

include/spdlog/sinks/basic_file_sink-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/sinks/basic_file_sink.h>
+#    include <spdlog/sinks/basic_file_sink.h>
 #endif
 
 #include <spdlog/common.h>

include/spdlog/sinks/basic_file_sink.h

@@ -54,5 +54,5 @@ inline std::shared_ptr<logger> basic_logger_st(const std::string &logger_name, c
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "basic_file_sink-inl.h"
+#    include "basic_file_sink-inl.h"
-#endif
+#endif

include/spdlog/sinks/daily_file_sink.h

@@ -39,18 +39,22 @@ struct daily_filename_calculator
 
 /*
  * Generator of daily log file names with strftime format.
- * Usages:  
+ * Usages:
  *    auto sink =  std::make_shared<spdlog::sinks::daily_file_format_sink_mt>("myapp-%Y-%m-%d:%H:%M:%S.log", hour, minute);"
  *    auto logger = spdlog::daily_logger_format_mt("loggername, "myapp-%Y-%m-%d:%X.log", hour,  minute)"
- *  
+ *
  */
 struct daily_filename_format_calculator
 {
-    static filename_t calc_filename (const filename_t &filename, const tm &now_tm)
+    static filename_t calc_filename(const filename_t &filename, const tm &now_tm)
     {
-         // generate fmt datetime format string, e.g. {:%Y-%m-%d}.
+        // generate fmt datetime format string, e.g. {:%Y-%m-%d}.
-        filename_t fmt_filename = fmt::format(SPDLOG_FILENAME_T ("{{:{}}}"), filename);
+        filename_t fmt_filename = fmt::format(SPDLOG_FILENAME_T("{{:{}}}"), filename);
+#if defined(_MSC_VER) && defined(SPDLOG_WCHAR_FILENAMES) // for some reason msvc doesnt allow fmt::runtime(..) with wchar here
         return fmt::format(fmt_filename, now_tm);
+#else
+        return fmt::format(SPDLOG_FMT_RUNTIME(fmt_filename), now_tm);
+#endif
     }
 };
 

include/spdlog/sinks/dup_filter_sink.h

@@ -7,6 +7,7 @@
 #include <spdlog/details/null_mutex.h>
 #include <spdlog/details/log_msg.h>
 
+#include <cstdio>
 #include <mutex>
 #include <string>
 #include <chrono>
@@ -62,10 +63,13 @@ protected:
         // log the "skipped.." message
         if (skip_counter_ > 0)
         {
-            memory_buf_t buf;
+            char buf[64];
-            fmt::format_to(buf, "Skipped {} duplicate messages..", skip_counter_);
+            auto msg_size = ::snprintf(buf, sizeof(buf), "Skipped %u duplicate messages..", static_cast<unsigned>(skip_counter_));
-            details::log_msg skipped_msg{msg.logger_name, level::info, string_view_t{buf.data(), buf.size()}};
+            if (msg_size > 0 && static_cast<size_t>(msg_size) < sizeof(buf))
-            dist_sink<Mutex>::sink_it_(skipped_msg);
+            {
+                details::log_msg skipped_msg{msg.logger_name, level::info, string_view_t{buf, static_cast<size_t>(msg_size)}};
+                dist_sink<Mutex>::sink_it_(skipped_msg);
+            }
         }
 
         // log current message

include/spdlog/sinks/hourly_file_sink.h

@@ -31,8 +31,8 @@ struct hourly_filename_calculator
     {
         filename_t basename, ext;
         std::tie(basename, ext) = details::file_helper::split_by_extension(filename);
-        return fmt::format(
+        return fmt::format(SPDLOG_FILENAME_T("{}_{:04d}{:02d}{:02d}_{:02d}{}"), basename, now_tm.tm_year + 1900, now_tm.tm_mon + 1,
-            SPDLOG_FILENAME_T("{}_{:04d}{:02d}{:02d}_{:02d}{}"), basename, now_tm.tm_year + 1900, now_tm.tm_mon + 1, now_tm.tm_mday, now_tm.tm_hour, ext);
+            now_tm.tm_mday, now_tm.tm_hour, ext);
     }
 };
 

include/spdlog/sinks/mongo_sink.h

@@ -0,0 +1,98 @@
+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+//
+// Custom sink for mongodb
+// Building and using requires mongocxx library.
+// For building mongocxx library check the url below
+// http://mongocxx.org/mongocxx-v3/installation/
+//
+
+#include "spdlog/common.h"
+#include "spdlog/details/log_msg.h"
+#include "spdlog/sinks/base_sink.h"
+#include <spdlog/details/synchronous_factory.h>
+
+#include <bsoncxx/builder/stream/document.hpp>
+#include <bsoncxx/types.hpp>
+#include <bsoncxx/view_or_value.hpp>
+
+#include <mongocxx/client.hpp>
+#include <mongocxx/instance.hpp>
+#include <mongocxx/uri.hpp>
+
+namespace spdlog {
+namespace sinks {
+template<typename Mutex>
+class mongo_sink : public base_sink<Mutex>
+{
+public:
+    mongo_sink(const std::string &db_name, const std::string &collection_name, const std::string &uri = "mongodb://localhost:27017")
+    {
+        try
+        {
+            client_ = std::make_unique<mongocxx::client>(mongocxx::uri{uri});
+            db_name_ = db_name;
+            coll_name_ = collection_name;
+        }
+        catch (const std::exception)
+        {
+            throw spdlog_ex("Error opening database");
+        }
+    }
+
+    ~mongo_sink()
+    {
+        flush_();
+    }
+
+protected:
+    void sink_it_(const details::log_msg &msg) override
+    {
+        using bsoncxx::builder::stream::document;
+        using bsoncxx::builder::stream::finalize;
+
+        if (client_ != nullptr)
+        {
+            auto doc = document{} << "timestamp" << bsoncxx::types::b_date(msg.time) << "level" << level::to_string_view(msg.level).data()
+                                  << "message" << std::string(msg.payload.begin(), msg.payload.end()) << "logger_name"
+                                  << std::string(msg.logger_name.begin(), msg.logger_name.end()) << "thread_id"
+                                  << static_cast<int>(msg.thread_id) << finalize;
+            client_->database(db_name_).collection(coll_name_).insert_one(doc.view());
+        }
+    }
+
+    void flush_() override {}
+
+private:
+    static mongocxx::instance instance_;
+    std::string db_name_;
+    std::string coll_name_;
+    std::unique_ptr<mongocxx::client> client_ = nullptr;
+};
+mongocxx::instance mongo_sink<std::mutex>::instance_{};
+
+#include "spdlog/details/null_mutex.h"
+#include <mutex>
+using mongo_sink_mt = mongo_sink<std::mutex>;
+using mongo_sink_st = mongo_sink<spdlog::details::null_mutex>;
+
+} // namespace sinks
+
+template<typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger> mongo_logger_mt(const std::string &logger_name, const std::string &db_name,
+    const std::string &collection_name, const std::string &uri = "mongodb://localhost:27017")
+{
+    return Factory::template create<sinks::mongo_sink_mt>(logger_name, db_name, collection_name, uri);
+}
+
+template<typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger> mongo_logger_st(const std::string &logger_name, const std::string &db_name,
+    const std::string &collection_name, const std::string &uri = "mongodb://localhost:27017")
+{
+    return Factory::template create<sinks::mongo_sink_st>(logger_name, db_name, collection_name, uri);
+}
+
+} // namespace spdlog

include/spdlog/sinks/msvc_sink.h

@@ -5,12 +5,11 @@
 
 #if defined(_WIN32)
 
-#include <spdlog/details/null_mutex.h>
+#    include <spdlog/details/null_mutex.h>
-#include <spdlog/sinks/base_sink.h>
+#    include <spdlog/sinks/base_sink.h>
-
-#include <mutex>
-#include <string>
 
+#    include <mutex>
+#    include <string>
 
 // Avoid including windows.h (https://stackoverflow.com/a/30741042)
 extern "C" __declspec(dllimport) void __stdcall OutputDebugStringA(const char *lpOutputString);

include/spdlog/sinks/qt_sinks.h

@@ -0,0 +1,200 @@
+// Copyright(c) 2015-present, Gabi Melman, mguludag and spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+//
+// Custom sink for QPlainTextEdit or QTextEdit and its children(QTextBrowser...
+// etc) Building and using requires Qt library.
+//
+
+#include "spdlog/common.h"
+#include "spdlog/details/log_msg.h"
+#include "spdlog/details/synchronous_factory.h"
+#include "spdlog/sinks/base_sink.h"
+
+#include <QObject>
+#include <QPlainTextEdit>
+#include <QTextEdit>
+
+namespace _spdlog_p {
+namespace _sinks_p {
+//
+// Private class for QTextEdit and its derivatives
+//
+class qtextedit_sink_p : public QObject
+{
+    Q_OBJECT
+public:
+    qtextedit_sink_p(QTextEdit *textedit = nullptr)
+    {
+        if (textedit != nullptr)
+        {
+            textedit_ = textedit;
+            connect(this, &qtextedit_sink_p::append_text, textedit_, &QTextEdit::append);
+        }
+    }
+
+    ~qtextedit_sink_p() {}
+
+    void append(const spdlog::string_view_t &str)
+    {
+        emit append_text(QString::fromUtf8(str.data(), static_cast<int>(str.size() - 2)));
+    }
+
+signals:
+    void append_text(const QString &);
+
+private:
+    QTextEdit *textedit_ = nullptr;
+};
+
+//
+// Private class for QPlainTextEdit
+//
+class qplaintextedit_sink_p : public QObject
+{
+    Q_OBJECT
+public:
+    qplaintextedit_sink_p(QPlainTextEdit *textedit = nullptr)
+    {
+        if (textedit != nullptr)
+        {
+            textedit_ = textedit;
+            connect(this, &qplaintextedit_sink_p::append_text, textedit_, &QPlainTextEdit::appendPlainText);
+        }
+    }
+
+    ~qplaintextedit_sink_p() {}
+
+    void append(const spdlog::string_view_t &str)
+    {
+        emit append_text(QString::fromUtf8(str.data(), static_cast<int>(str.size() - 2)));
+    }
+
+signals:
+    void append_text(const QString &);
+
+private:
+    QPlainTextEdit *textedit_ = nullptr;
+};
+} // namespace _sinks_p
+} // namespace _spdlog_p
+
+//
+// qtextedit_sink class
+//
+namespace spdlog {
+namespace sinks {
+template<typename Mutex>
+class qtextedit_sink : public base_sink<Mutex>
+{
+public:
+    qtextedit_sink(QTextEdit *textedit = nullptr)
+    {
+        if (textedit != nullptr)
+        {
+            textedit_p = std::make_shared<_spdlog_p::_sinks_p::qtextedit_sink_p>(textedit);
+        }
+        else
+        {
+            throw spdlog_ex("Error opening QTextEdit");
+        }
+    }
+
+    ~qtextedit_sink()
+    {
+        flush_();
+    }
+
+protected:
+    void sink_it_(const details::log_msg &msg) override
+    {
+        memory_buf_t formatted;
+        base_sink<Mutex>::formatter_->format(msg, formatted);
+        string_view_t str_v = string_view_t(formatted.data(), formatted.size());
+        textedit_p->append(str_v);
+    }
+
+    void flush_() override {}
+
+private:
+    std::shared_ptr<_spdlog_p::_sinks_p::qtextedit_sink_p> textedit_p = nullptr;
+};
+
+//
+// qplaintextedit_sink class
+//
+template<typename Mutex>
+class qplaintextedit_sink : public base_sink<Mutex>
+{
+public:
+    qplaintextedit_sink(QPlainTextEdit *textedit = nullptr)
+    {
+        if (textedit != nullptr)
+        {
+            textedit_p = std::make_shared<_spdlog_p::_sinks_p::qplaintextedit_sink_p>(textedit);
+        }
+        else
+        {
+            throw spdlog_ex("Error opening QPlainTextEdit");
+        }
+    }
+
+    ~qplaintextedit_sink()
+    {
+        flush_();
+    }
+
+protected:
+    void sink_it_(const details::log_msg &msg) override
+    {
+        memory_buf_t formatted;
+        base_sink<Mutex>::formatter_->format(msg, formatted);
+        string_view_t str_v = string_view_t(formatted.data(), formatted.size());
+        textedit_p->append(str_v);
+    }
+
+    void flush_() override {}
+
+private:
+    std::shared_ptr<_spdlog_p::_sinks_p::qplaintextedit_sink_p> textedit_p = nullptr;
+};
+
+#include "spdlog/details/null_mutex.h"
+#include <mutex>
+using qtextedit_sink_mt = qtextedit_sink<std::mutex>;
+using qtextedit_sink_st = qtextedit_sink<spdlog::details::null_mutex>;
+
+using qplaintextedit_sink_mt = qplaintextedit_sink<std::mutex>;
+using qplaintextedit_sink_st = qplaintextedit_sink<spdlog::details::null_mutex>;
+
+} // namespace sinks
+
+//
+// Factory functions
+//
+template<typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger> qtextedit_logger_mt(const std::string &logger_name, QTextEdit *qtextedit = nullptr)
+{
+    return Factory::template create<sinks::qtextedit_sink_mt>(logger_name, qtextedit);
+}
+
+template<typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger> qtextedit_logger_st(const std::string &logger_name, QTextEdit *qtextedit = nullptr)
+{
+    return Factory::template create<sinks::qtextedit_sink_st>(logger_name, qtextedit);
+}
+
+template<typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger> qplaintextedit_logger_mt(const std::string &logger_name, QPlainTextEdit *qplaintextedit = nullptr)
+{
+    return Factory::template create<sinks::qplaintextedit_sink_mt>(logger_name, qplaintextedit);
+}
+
+template<typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger> qplaintextedit_logger_st(const std::string &logger_name, QPlainTextEdit *qplaintextedit = nullptr)
+{
+    return Factory::template create<sinks::qplaintextedit_sink_st>(logger_name, qplaintextedit);
+}
+} // namespace spdlog

include/spdlog/sinks/rotating_file_sink-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/sinks/rotating_file_sink.h>
+#    include <spdlog/sinks/rotating_file_sink.h>
 #endif
 
 #include <spdlog/common.h>

include/spdlog/sinks/rotating_file_sink.h

@@ -74,5 +74,5 @@ inline std::shared_ptr<logger> rotating_logger_st(
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "rotating_file_sink-inl.h"
+#    include "rotating_file_sink-inl.h"
 #endif

include/spdlog/sinks/sink-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/sinks/sink.h>
+#    include <spdlog/sinks/sink.h>
 #endif
 
 #include <spdlog/common.h>

include/spdlog/sinks/sink.h

@@ -31,5 +31,5 @@ protected:
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "sink-inl.h"
+#    include "sink-inl.h"
 #endif

include/spdlog/sinks/stdout_color_sinks-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/sinks/stdout_color_sinks.h>
+#    include <spdlog/sinks/stdout_color_sinks.h>
 #endif
 
 #include <spdlog/logger.h>
@@ -35,4 +35,4 @@ SPDLOG_INLINE std::shared_ptr<logger> stderr_color_st(const std::string &logger_
 {
     return Factory::template create<sinks::stderr_color_sink_st>(logger_name, mode);
 }
-} // namespace spdlog
+} // namespace spdlog

include/spdlog/sinks/stdout_color_sinks.h

@@ -4,9 +4,9 @@
 #pragma once
 
 #ifdef _WIN32
-#include <spdlog/sinks/wincolor_sink.h>
+#    include <spdlog/sinks/wincolor_sink.h>
 #else
-#include <spdlog/sinks/ansicolor_sink.h>
+#    include <spdlog/sinks/ansicolor_sink.h>
 #endif
 
 #include <spdlog/details/synchronous_factory.h>
@@ -41,5 +41,5 @@ std::shared_ptr<logger> stderr_color_st(const std::string &logger_name, color_mo
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "stdout_color_sinks-inl.h"
+#    include "stdout_color_sinks-inl.h"
 #endif

include/spdlog/sinks/stdout_sinks-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/sinks/stdout_sinks.h>
+#    include <spdlog/sinks/stdout_sinks.h>
 #endif
 
 #include <spdlog/details/console_globals.h>
@@ -14,11 +14,15 @@
 #ifdef _WIN32
 // under windows using fwrite to non-binary stream results in \r\r\n (see issue #1675)
 // so instead we use ::FileWrite
-#include <spdlog/details/windows_include.h>
+#    include <spdlog/details/windows_include.h>
-#include <fileapi.h> // WriteFile (..)
+
-#include <io.h>      // _get_osfhandle(..)
+#    ifndef _USING_V110_SDK71_ // fileapi.h doesnt exist in winxp
-#include <stdio.h>   // _fileno(..)
+#        include <fileapi.h>   // WriteFile (..)
-#endif               // WIN32
+#    endif
+
+#    include <io.h>    // _get_osfhandle(..)
+#    include <stdio.h> // _fileno(..)
+#endif                 // WIN32
 
 namespace spdlog {
 
@@ -32,9 +36,9 @@ SPDLOG_INLINE stdout_sink_base<ConsoleMutex>::stdout_sink_base(FILE *file)
 {
 #ifdef _WIN32
     // get windows handle from the FILE* object
-    
+
-    handle_ = (HANDLE)::_get_osfhandle(::_fileno(file_));    
+    handle_ = (HANDLE)::_get_osfhandle(::_fileno(file_));
-        
+
     // don't throw to support cases where no console is attached,
     // and let the log method to do nothing if (handle_ == INVALID_HANDLE_VALUE).
     // throw only if non stdout/stderr target is requested (probably regular file and not console).
@@ -50,7 +54,7 @@ SPDLOG_INLINE void stdout_sink_base<ConsoleMutex>::log(const details::log_msg &m
 {
 #ifdef _WIN32
     if (handle_ == INVALID_HANDLE_VALUE)
-    {        
+    {
         return;
     }
     std::lock_guard<mutex_t> lock(mutex_);
@@ -70,7 +74,7 @@ SPDLOG_INLINE void stdout_sink_base<ConsoleMutex>::log(const details::log_msg &m
     formatter_->format(msg, formatted);
     ::fwrite(formatted.data(), sizeof(char), formatted.size(), file_);
     ::fflush(file_); // flush every line to terminal
-#endif // WIN32    
+#endif // WIN32
 }
 
 template<typename ConsoleMutex>

include/spdlog/sinks/stdout_sinks.h

@@ -9,7 +9,7 @@
 #include <cstdio>
 
 #ifdef _WIN32
-#include <spdlog/details/windows_include.h>
+#    include <spdlog/details/windows_include.h>
 #endif
 
 namespace spdlog {
@@ -41,7 +41,7 @@ protected:
     FILE *file_;
     std::unique_ptr<spdlog::formatter> formatter_;
 #ifdef _WIN32
-    HANDLE handle_;    
+    HANDLE handle_;
 #endif // WIN32
 };
 
@@ -83,5 +83,5 @@ std::shared_ptr<logger> stderr_logger_st(const std::string &logger_name);
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "stdout_sinks-inl.h"
+#    include "stdout_sinks-inl.h"
 #endif

include/spdlog/sinks/systemd_sink.h

@@ -9,7 +9,7 @@
 
 #include <array>
 #ifndef SD_JOURNAL_SUPPRESS_LOCATION
-#define SD_JOURNAL_SUPPRESS_LOCATION
+#    define SD_JOURNAL_SUPPRESS_LOCATION
 #endif
 #include <systemd/sd-journal.h>
 

include/spdlog/sinks/tcp_sink.h

@@ -7,9 +7,9 @@
 #include <spdlog/sinks/base_sink.h>
 #include <spdlog/details/null_mutex.h>
 #ifdef _WIN32
-#include <spdlog/details/tcp_client-windows.h>
+#    include <spdlog/details/tcp_client-windows.h>
 #else
-#include <spdlog/details/tcp_client.h>
+#    include <spdlog/details/tcp_client.h>
 #endif
 
 #include <mutex>

include/spdlog/sinks/win_eventlog_sink.h

@@ -229,11 +229,11 @@ protected:
 
         LPCWSTR lp_wstr = buf.data();
         succeeded = ::ReportEventW(event_log_handle(), eventlog::get_event_type(msg), eventlog::get_event_category(msg), event_id_,
-                current_user_sid_.as_sid(), 1, 0, &lp_wstr, nullptr);
+            current_user_sid_.as_sid(), 1, 0, &lp_wstr, nullptr);
 #else
         LPCSTR lp_str = formatted.data();
         succeeded = ::ReportEventA(event_log_handle(), eventlog::get_event_type(msg), eventlog::get_event_category(msg), event_id_,
-                current_user_sid_.as_sid(), 1, 0, &lp_str, nullptr);
+            current_user_sid_.as_sid(), 1, 0, &lp_str, nullptr);
 #endif
 
         if (!succeeded)

include/spdlog/sinks/wincolor_sink-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/sinks/wincolor_sink.h>
+#    include <spdlog/sinks/wincolor_sink.h>
 #endif
 
 #include <spdlog/details/windows_include.h>
@@ -129,10 +129,10 @@ std::uint16_t SPDLOG_INLINE wincolor_sink<ConsoleMutex>::set_foreground_color_(s
     if (!::GetConsoleScreenBufferInfo(static_cast<HANDLE>(out_handle_), &orig_buffer_info))
     {
         // just return white if failed getting console info
-        return FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE; 
+        return FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
     }
-    
+
-    // change only the foreground bits (lowest 4 bits) 
+    // change only the foreground bits (lowest 4 bits)
     auto new_attribs = static_cast<WORD>(attribs) | (orig_buffer_info.wAttributes & 0xfff0);
     auto ignored = ::SetConsoleTextAttribute(static_cast<HANDLE>(out_handle_), static_cast<WORD>(new_attribs));
     (void)(ignored);

include/spdlog/sinks/wincolor_sink.h

@@ -23,7 +23,7 @@ namespace sinks {
 template<typename ConsoleMutex>
 class wincolor_sink : public sink
 {
-public:   
+public:
     wincolor_sink(void *out_handle, color_mode mode);
     ~wincolor_sink() override;
 
@@ -41,7 +41,7 @@ public:
 protected:
     using mutex_t = typename ConsoleMutex::mutex_t;
     void *out_handle_;
-    mutex_t &mutex_;    
+    mutex_t &mutex_;
     bool should_do_colors_;
     std::unique_ptr<spdlog::formatter> formatter_;
     std::array<std::uint16_t, level::n_levels> colors_;
@@ -81,5 +81,5 @@ using wincolor_stderr_sink_st = wincolor_stderr_sink<details::console_nullmutex>
 } // namespace spdlog
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "wincolor_sink-inl.h"
+#    include "wincolor_sink-inl.h"
 #endif

include/spdlog/spdlog-inl.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #ifndef SPDLOG_HEADER_ONLY
-#include <spdlog/spdlog.h>
+#    include <spdlog/spdlog.h>
 #endif
 
 #include <spdlog/common.h>

include/spdlog/spdlog.h

@@ -127,50 +127,50 @@ SPDLOG_API spdlog::logger *default_logger_raw();
 
 SPDLOG_API void set_default_logger(std::shared_ptr<spdlog::logger> default_logger);
 
-template<typename FormatString, typename... Args>
+template<typename... Args>
-inline void log(source_loc source, level::level_enum lvl, const FormatString &fmt, Args&&...args)
+inline void log(source_loc source, level::level_enum lvl, fmt::format_string<Args...> fmt, Args &&...args)
 {
     default_logger_raw()->log(source, lvl, fmt, std::forward<Args>(args)...);
 }
 
-template<typename FormatString, typename... Args>
+template<typename... Args>
-inline void log(level::level_enum lvl, const FormatString &fmt, Args&&...args)
+inline void log(level::level_enum lvl, fmt::format_string<Args...> fmt, Args &&...args)
 {
     default_logger_raw()->log(source_loc{}, lvl, fmt, std::forward<Args>(args)...);
 }
 
-template<typename FormatString, typename... Args>
+template<typename... Args>
-inline void trace(const FormatString &fmt, Args&&...args)
+inline void trace(fmt::format_string<Args...> fmt, Args &&...args)
 {
     default_logger_raw()->trace(fmt, std::forward<Args>(args)...);
 }
 
-template<typename FormatString, typename... Args>
+template<typename... Args>
-inline void debug(const FormatString &fmt, Args&&...args)
+inline void debug(fmt::format_string<Args...> fmt, Args &&...args)
 {
     default_logger_raw()->debug(fmt, std::forward<Args>(args)...);
 }
 
-template<typename FormatString, typename... Args>
+template<typename... Args>
-inline void info(const FormatString &fmt, Args&&...args)
+inline void info(fmt::format_string<Args...> fmt, Args &&...args)
 {
     default_logger_raw()->info(fmt, std::forward<Args>(args)...);
 }
 
-template<typename FormatString, typename... Args>
+template<typename... Args>
-inline void warn(const FormatString &fmt, Args&&...args)
+inline void warn(fmt::format_string<Args...> fmt, Args &&...args)
 {
     default_logger_raw()->warn(fmt, std::forward<Args>(args)...);
 }
 
-template<typename FormatString, typename... Args>
+template<typename... Args>
-inline void error(const FormatString &fmt, Args&&...args)
+inline void error(fmt::format_string<Args...> fmt, Args &&...args)
 {
     default_logger_raw()->error(fmt, std::forward<Args>(args)...);
 }
 
-template<typename FormatString, typename... Args>
+template<typename... Args>
-inline void critical(const FormatString &fmt, Args&&...args)
+inline void critical(fmt::format_string<Args...> fmt, Args &&...args)
 {
     default_logger_raw()->critical(fmt, std::forward<Args>(args)...);
 }
@@ -187,6 +187,56 @@ inline void log(level::level_enum lvl, const T &msg)
     default_logger_raw()->log(lvl, msg);
 }
 
+#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+template<typename... Args>
+inline void log(source_loc source, level::level_enum lvl, fmt::wformat_string<Args...> fmt, Args &&...args)
+{
+    default_logger_raw()->log(source, lvl, fmt, std::forward<Args>(args)...);
+}
+
+template<typename... Args>
+inline void log(level::level_enum lvl, fmt::wformat_string<Args...> fmt, Args &&...args)
+{
+    default_logger_raw()->log(source_loc{}, lvl, fmt, std::forward<Args>(args)...);
+}
+
+template<typename... Args>
+inline void trace(fmt::wformat_string<Args...> fmt, Args &&...args)
+{
+    default_logger_raw()->trace(fmt, std::forward<Args>(args)...);
+}
+
+template<typename... Args>
+inline void debug(fmt::wformat_string<Args...> fmt, Args &&...args)
+{
+    default_logger_raw()->debug(fmt, std::forward<Args>(args)...);
+}
+
+template<typename... Args>
+inline void info(fmt::wformat_string<Args...> fmt, Args &&...args)
+{
+    default_logger_raw()->info(fmt, std::forward<Args>(args)...);
+}
+
+template<typename... Args>
+inline void warn(fmt::wformat_string<Args...> fmt, Args &&...args)
+{
+    default_logger_raw()->warn(fmt, std::forward<Args>(args)...);
+}
+
+template<typename... Args>
+inline void error(fmt::wformat_string<Args...> fmt, Args &&...args)
+{
+    default_logger_raw()->error(fmt, std::forward<Args>(args)...);
+}
+
+template<typename... Args>
+inline void critical(fmt::wformat_string<Args...> fmt, Args &&...args)
+{
+    default_logger_raw()->critical(fmt, std::forward<Args>(args)...);
+}
+#endif
+
 template<typename T>
 inline void trace(const T &msg)
 {
@@ -241,55 +291,55 @@ inline void critical(const T &msg)
 #define SPDLOG_LOGGER_CALL(logger, level, ...) (logger)->log(spdlog::source_loc{__FILE__, __LINE__, SPDLOG_FUNCTION}, level, __VA_ARGS__)
 
 #if SPDLOG_ACTIVE_LEVEL <= SPDLOG_LEVEL_TRACE
-#define SPDLOG_LOGGER_TRACE(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::trace, __VA_ARGS__)
+#    define SPDLOG_LOGGER_TRACE(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::trace, __VA_ARGS__)
-#define SPDLOG_TRACE(...) SPDLOG_LOGGER_TRACE(spdlog::default_logger_raw(), __VA_ARGS__)
+#    define SPDLOG_TRACE(...) SPDLOG_LOGGER_TRACE(spdlog::default_logger_raw(), __VA_ARGS__)
 #else
-#define SPDLOG_LOGGER_TRACE(logger, ...) (void)0
+#    define SPDLOG_LOGGER_TRACE(logger, ...) (void)0
-#define SPDLOG_TRACE(...) (void)0
+#    define SPDLOG_TRACE(...) (void)0
 #endif
 
 #if SPDLOG_ACTIVE_LEVEL <= SPDLOG_LEVEL_DEBUG
-#define SPDLOG_LOGGER_DEBUG(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::debug, __VA_ARGS__)
+#    define SPDLOG_LOGGER_DEBUG(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::debug, __VA_ARGS__)
-#define SPDLOG_DEBUG(...) SPDLOG_LOGGER_DEBUG(spdlog::default_logger_raw(), __VA_ARGS__)
+#    define SPDLOG_DEBUG(...) SPDLOG_LOGGER_DEBUG(spdlog::default_logger_raw(), __VA_ARGS__)
 #else
-#define SPDLOG_LOGGER_DEBUG(logger, ...) (void)0
+#    define SPDLOG_LOGGER_DEBUG(logger, ...) (void)0
-#define SPDLOG_DEBUG(...) (void)0
+#    define SPDLOG_DEBUG(...) (void)0
 #endif
 
 #if SPDLOG_ACTIVE_LEVEL <= SPDLOG_LEVEL_INFO
-#define SPDLOG_LOGGER_INFO(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::info, __VA_ARGS__)
+#    define SPDLOG_LOGGER_INFO(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::info, __VA_ARGS__)
-#define SPDLOG_INFO(...) SPDLOG_LOGGER_INFO(spdlog::default_logger_raw(), __VA_ARGS__)
+#    define SPDLOG_INFO(...) SPDLOG_LOGGER_INFO(spdlog::default_logger_raw(), __VA_ARGS__)
 #else
-#define SPDLOG_LOGGER_INFO(logger, ...) (void)0
+#    define SPDLOG_LOGGER_INFO(logger, ...) (void)0
-#define SPDLOG_INFO(...) (void)0
+#    define SPDLOG_INFO(...) (void)0
 #endif
 
 #if SPDLOG_ACTIVE_LEVEL <= SPDLOG_LEVEL_WARN
-#define SPDLOG_LOGGER_WARN(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::warn, __VA_ARGS__)
+#    define SPDLOG_LOGGER_WARN(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::warn, __VA_ARGS__)
-#define SPDLOG_WARN(...) SPDLOG_LOGGER_WARN(spdlog::default_logger_raw(), __VA_ARGS__)
+#    define SPDLOG_WARN(...) SPDLOG_LOGGER_WARN(spdlog::default_logger_raw(), __VA_ARGS__)
 #else
-#define SPDLOG_LOGGER_WARN(logger, ...) (void)0
+#    define SPDLOG_LOGGER_WARN(logger, ...) (void)0
-#define SPDLOG_WARN(...) (void)0
+#    define SPDLOG_WARN(...) (void)0
 #endif
 
 #if SPDLOG_ACTIVE_LEVEL <= SPDLOG_LEVEL_ERROR
-#define SPDLOG_LOGGER_ERROR(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::err, __VA_ARGS__)
+#    define SPDLOG_LOGGER_ERROR(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::err, __VA_ARGS__)
-#define SPDLOG_ERROR(...) SPDLOG_LOGGER_ERROR(spdlog::default_logger_raw(), __VA_ARGS__)
+#    define SPDLOG_ERROR(...) SPDLOG_LOGGER_ERROR(spdlog::default_logger_raw(), __VA_ARGS__)
 #else
-#define SPDLOG_LOGGER_ERROR(logger, ...) (void)0
+#    define SPDLOG_LOGGER_ERROR(logger, ...) (void)0
-#define SPDLOG_ERROR(...) (void)0
+#    define SPDLOG_ERROR(...) (void)0
 #endif
 
 #if SPDLOG_ACTIVE_LEVEL <= SPDLOG_LEVEL_CRITICAL
-#define SPDLOG_LOGGER_CRITICAL(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::critical, __VA_ARGS__)
+#    define SPDLOG_LOGGER_CRITICAL(logger, ...) SPDLOG_LOGGER_CALL(logger, spdlog::level::critical, __VA_ARGS__)
-#define SPDLOG_CRITICAL(...) SPDLOG_LOGGER_CRITICAL(spdlog::default_logger_raw(), __VA_ARGS__)
+#    define SPDLOG_CRITICAL(...) SPDLOG_LOGGER_CRITICAL(spdlog::default_logger_raw(), __VA_ARGS__)
 #else
-#define SPDLOG_LOGGER_CRITICAL(logger, ...) (void)0
+#    define SPDLOG_LOGGER_CRITICAL(logger, ...) (void)0
-#define SPDLOG_CRITICAL(...) (void)0
+#    define SPDLOG_CRITICAL(...) (void)0
 #endif
 
 #ifdef SPDLOG_HEADER_ONLY
-#include "spdlog-inl.h"
+#    include "spdlog-inl.h"
 #endif
 
 #endif // SPDLOG_H

include/spdlog/tweakme.h

@@ -87,7 +87,7 @@
 ///////////////////////////////////////////////////////////////////////////////
 
 ///////////////////////////////////////////////////////////////////////////////
-// Uncomment to customize level names (e.g. "MT TRACE")
+// Uncomment to customize level names (e.g. "MY TRACE")
 //
 // #define SPDLOG_LEVEL_NAMES { "MY TRACE", "MY DEBUG", "MY INFO", "MY WARNING",
 // "MY ERROR", "MY CRITICAL", "OFF" }

include/spdlog/version.h

@@ -4,7 +4,7 @@
 #pragma once
 
 #define SPDLOG_VER_MAJOR 1
-#define SPDLOG_VER_MINOR 8
+#define SPDLOG_VER_MINOR 9
-#define SPDLOG_VER_PATCH 5
+#define SPDLOG_VER_PATCH 0
 
 #define SPDLOG_VERSION (SPDLOG_VER_MAJOR * 10000 + SPDLOG_VER_MINOR * 100 + SPDLOG_VER_PATCH)

scripts/extract_version.py

@@ -4,14 +4,14 @@ import os
 import re
 
 base_path = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
-config_h  = os.path.join(base_path, 'include', 'spdlog', 'version.h')
+config_h = os.path.join(base_path, 'include', 'spdlog', 'version.h')
-data      = {'MAJOR': 0, 'MINOR': 0, 'PATCH': 0}
+data = {'MAJOR': 0, 'MINOR': 0, 'PATCH': 0}
-reg       = re.compile(r'^\s*#define\s+SPDLOG_VER_([A-Z]+)\s+([0-9]+).*$')
+reg = re.compile(r'^\s*#define\s+SPDLOG_VER_([A-Z]+)\s+([0-9]+).*$')
 
 with open(config_h, 'r') as fp:
-  for l in fp:
+    for l in fp:
-    m = reg.match(l)
+        m = reg.match(l)
-    if m:
+        if m:
-      data[m.group(1)] = int(m.group(2))
+            data[m.group(1)] = int(m.group(2))
 
-print('{}.{}.{}'.format(data['MAJOR'], data['MINOR'], data['PATCH']))
+print(f"{data['MAJOR']}.{data['MINOR']}.{data['PATCH']}")

src/async.cpp

@@ -2,7 +2,7 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 
 #ifndef SPDLOG_COMPILED_LIB
-#error Please define SPDLOG_COMPILED_LIB to compile this file.
+#    error Please define SPDLOG_COMPILED_LIB to compile this file.
 #endif
 
 #include <spdlog/async.h>
@@ -10,4 +10,4 @@
 #include <spdlog/details/periodic_worker-inl.h>
 #include <spdlog/details/thread_pool-inl.h>
 
-template class SPDLOG_API spdlog::details::mpmc_blocking_queue<spdlog::details::async_msg>;
+template class SPDLOG_API spdlog::details::mpmc_blocking_queue<spdlog::details::async_msg>;

src/cfg.cpp

@@ -2,7 +2,7 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 
 #ifndef SPDLOG_COMPILED_LIB
-#error Please define SPDLOG_COMPILED_LIB to compile this file.
+#    error Please define SPDLOG_COMPILED_LIB to compile this file.
 #endif
 
-#include <spdlog/cfg/helpers-inl.h>
+#include <spdlog/cfg/helpers-inl.h>

src/color_sinks.cpp

@@ -2,7 +2,7 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 
 #ifndef SPDLOG_COMPILED_LIB
-#error Please define SPDLOG_COMPILED_LIB to compile this file.
+#    error Please define SPDLOG_COMPILED_LIB to compile this file.
 #endif
 
 #include <mutex>
@@ -13,7 +13,7 @@
 // color sinks
 //
 #ifdef _WIN32
-#include <spdlog/sinks/wincolor_sink-inl.h>
+#    include <spdlog/sinks/wincolor_sink-inl.h>
 template class SPDLOG_API spdlog::sinks::wincolor_sink<spdlog::details::console_mutex>;
 template class SPDLOG_API spdlog::sinks::wincolor_sink<spdlog::details::console_nullmutex>;
 template class SPDLOG_API spdlog::sinks::wincolor_stdout_sink<spdlog::details::console_mutex>;
@@ -21,7 +21,7 @@ template class SPDLOG_API spdlog::sinks::wincolor_stdout_sink<spdlog::details::c
 template class SPDLOG_API spdlog::sinks::wincolor_stderr_sink<spdlog::details::console_mutex>;
 template class SPDLOG_API spdlog::sinks::wincolor_stderr_sink<spdlog::details::console_nullmutex>;
 #else
-#include "spdlog/sinks/ansicolor_sink-inl.h"
+#    include "spdlog/sinks/ansicolor_sink-inl.h"
 template class SPDLOG_API spdlog::sinks::ansicolor_sink<spdlog::details::console_mutex>;
 template class SPDLOG_API spdlog::sinks::ansicolor_sink<spdlog::details::console_nullmutex>;
 template class SPDLOG_API spdlog::sinks::ansicolor_stdout_sink<spdlog::details::console_mutex>;

src/file_sinks.cpp

@@ -2,7 +2,7 @@
 // Distributed under the MIT License (http://opensource.org/licenses/MIT)
 
 #ifndef SPDLOG_COMPILED_LIB
-#error Please define SPDLOG_COMPILED_LIB to compile this file.
+#    error Please define SPDLOG_COMPILED_LIB to compile this file.
 #endif
 
 #include <spdlog/details/null_mutex.h>
@@ -17,4 +17,4 @@ template class SPDLOG_API spdlog::sinks::basic_file_sink<spdlog::details::null_m
 
 #include <spdlog/sinks/rotating_file_sink-inl.h>
 template class SPDLOG_API spdlog::sinks::rotating_file_sink<std::mutex>;
-template class SPDLOG_API spdlog::sinks::rotating_file_sink<spdlog::details::null_mutex>;
+template class SPDLOG_API spdlog::sinks::rotating_file_sink<spdlog::details::null_mutex>;

src/fmt.cpp

@@ -3,101 +3,66 @@
 // All rights reserved.
 
 #ifndef SPDLOG_COMPILED_LIB
-#error Please define SPDLOG_COMPILED_LIB to compile this file.
+#    error Please define SPDLOG_COMPILED_LIB to compile this file.
 #endif
 
 #if !defined(SPDLOG_FMT_EXTERNAL)
-#include <spdlog/fmt/bundled/format-inl.h>
+#    include <spdlog/fmt/bundled/format-inl.h>
-
 
 FMT_BEGIN_NAMESPACE
 namespace detail {
 
-template <typename T>
+template<typename T>
-int format_float(char* buf, std::size_t size, const char* format, int precision,
+int format_float(char *buf, std::size_t size, const char *format, int precision, T value)
-                 T value) {
+{
-#ifdef FMT_FUZZ
+#    ifdef FMT_FUZZ
-  if (precision > 100000)
+    if (precision > 100000)
-    throw std::runtime_error(
+        throw std::runtime_error("fuzz mode - avoid large allocation inside snprintf");
-        "fuzz mode - avoid large allocation inside snprintf");
+#    endif
-#endif
+    // Suppress the warning about nonliteral format string.
-  // Suppress the warning about nonliteral format string.
+    int (*snprintf_ptr)(char *, size_t, const char *, ...) = FMT_SNPRINTF;
-  int (*snprintf_ptr)(char*, size_t, const char*, ...) = FMT_SNPRINTF;
+    return precision < 0 ? snprintf_ptr(buf, size, format, value) : snprintf_ptr(buf, size, format, precision, value);
-  return precision < 0 ? snprintf_ptr(buf, size, format, value)
-                       : snprintf_ptr(buf, size, format, precision, value);
 }
 
-template FMT_API dragonbox::decimal_fp<float> dragonbox::to_decimal(float x)
+template FMT_API dragonbox::decimal_fp<float> dragonbox::to_decimal(float x) FMT_NOEXCEPT;
-    FMT_NOEXCEPT;
+template FMT_API dragonbox::decimal_fp<double> dragonbox::to_decimal(double x) FMT_NOEXCEPT;
-template FMT_API dragonbox::decimal_fp<double> dragonbox::to_decimal(double x)
+} // namespace detail
-    FMT_NOEXCEPT;
-
-// DEPRECATED! This function exists for ABI compatibility.
-template <typename Char>
-typename basic_format_context<std::back_insert_iterator<buffer<Char>>,
-                              Char>::iterator
-vformat_to(buffer<Char>& buf, basic_string_view<Char> format_str,
-           basic_format_args<basic_format_context<
-               std::back_insert_iterator<buffer<type_identity_t<Char>>>,
-               type_identity_t<Char>>>
-               args) {
-  using iterator = std::back_insert_iterator<buffer<char>>;
-  using context = basic_format_context<
-      std::back_insert_iterator<buffer<type_identity_t<Char>>>,
-      type_identity_t<Char>>;
-  auto out = iterator(buf);
-  format_handler<iterator, Char, context> h(out, format_str, args, {});
-  parse_format_string<false>(format_str, h);
-  return out;
-}
-template basic_format_context<std::back_insert_iterator<buffer<char>>,
-                              char>::iterator
-vformat_to(buffer<char>&, string_view,
-           basic_format_args<basic_format_context<
-               std::back_insert_iterator<buffer<type_identity_t<char>>>,
-               type_identity_t<char>>>);
-}  // namespace detail
-
-template struct FMT_INSTANTIATION_DEF_API detail::basic_data<void>;
 
 // Workaround a bug in MSVC2013 that prevents instantiation of format_float.
-int (*instantiate_format_float)(double, int, detail::float_specs,
+int (*instantiate_format_float)(double, int, detail::float_specs, detail::buffer<char> &) = detail::format_float;
-                                detail::buffer<char>&) = detail::format_float;
 
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+#    ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-template FMT_API detail::locale_ref::locale_ref(const std::locale& loc);
+template FMT_API detail::locale_ref::locale_ref(const std::locale &loc);
 template FMT_API std::locale detail::locale_ref::get<std::locale>() const;
-#endif
+#    endif
 
 // Explicit instantiations for char.
 
-template FMT_API std::string detail::grouping_impl<char>(locale_ref);
+template FMT_API auto detail::thousands_sep_impl(locale_ref) -> thousands_sep_result<char>;
-template FMT_API char detail::thousands_sep_impl(locale_ref);
 template FMT_API char detail::decimal_point_impl(locale_ref);
 
-template FMT_API void detail::buffer<char>::append(const char*, const char*);
+template FMT_API void detail::buffer<char>::append(const char *, const char *);
 
+// DEPRECATED!
+// There is no correspondent extern template in format.h because of
+// incompatibility between clang and gcc (#2377).
 template FMT_API void detail::vformat_to(
-    detail::buffer<char>&, string_view,
+    detail::buffer<char> &, string_view, basic_format_args<FMT_BUFFER_CONTEXT(char)>, detail::locale_ref);
-    basic_format_args<FMT_BUFFER_CONTEXT(char)>, detail::locale_ref);
 
-template FMT_API int detail::snprintf_float(double, int, detail::float_specs,
+template FMT_API int detail::snprintf_float(double, int, detail::float_specs, detail::buffer<char> &);
-                                            detail::buffer<char>&);
+template FMT_API int detail::snprintf_float(long double, int, detail::float_specs, detail::buffer<char> &);
-template FMT_API int detail::snprintf_float(long double, int,
+template FMT_API int detail::format_float(double, int, detail::float_specs, detail::buffer<char> &);
-                                            detail::float_specs,
+template FMT_API int detail::format_float(long double, int, detail::float_specs, detail::buffer<char> &);
-                                            detail::buffer<char>&);
-template FMT_API int detail::format_float(double, int, detail::float_specs,
-                                          detail::buffer<char>&);
-template FMT_API int detail::format_float(long double, int, detail::float_specs,
-                                          detail::buffer<char>&);
 
 // Explicit instantiations for wchar_t.
 
-template FMT_API std::string detail::grouping_impl<wchar_t>(locale_ref);
+template FMT_API auto detail::thousands_sep_impl(locale_ref) -> thousands_sep_result<wchar_t>;
-template FMT_API wchar_t detail::thousands_sep_impl(locale_ref);
 template FMT_API wchar_t detail::decimal_point_impl(locale_ref);
 
-template FMT_API void detail::buffer<wchar_t>::append(const wchar_t*,
+template FMT_API void detail::buffer<wchar_t>::append(const wchar_t *, const wchar_t *);
-                                                      const wchar_t*);
+
+template struct detail::basic_data<void>;
+
 FMT_END_NAMESPACE
+
 #endif // !SPDLOG_FMT_EXTERNAL