Version 1.2.0

return nothing if it's a void function.

.clang-tidy

@@ -0,0 +1,28 @@
+Checks: 'modernize-*,modernize-use-override,google-*,-google-runtime-references,misc-*,clang-analyzer-*'
+WarningsAsErrors: ''
+HeaderFilterRegex: 'async.h|async_logger.h|common.h|details|formatter.h|logger.h|sinks|spdlog.h|tweakme.h|version.h'
+AnalyzeTemporaryDtors: false
+FormatStyle:     none
+
+CheckOptions:    
+  - key:             google-readability-braces-around-statements.ShortStatementLines
+    value:           '1'
+  - key:             google-readability-function-size.StatementThreshold
+    value:           '800'
+  - key:             google-readability-namespace-comments.ShortNamespaceLines
+    value:           '10'
+  - key:             google-readability-namespace-comments.SpacesBeforeComments
+    value:           '2'
+  - key:             modernize-loop-convert.MaxCopySize
+    value:           '16'
+  - key:             modernize-loop-convert.MinConfidence
+    value:           reasonable
+  - key:             modernize-loop-convert.NamingStyle
+    value:           CamelCase
+  - key:             modernize-pass-by-value.IncludeStyle
+    value:           llvm
+  - key:             modernize-replace-auto-ptr.IncludeStyle
+    value:           llvm
+  - key:             modernize-use-nullptr.NullMacros
+    value:           'NULL'
+

.travis.yml

@@ -2,90 +2,114 @@
 # - Louis Dionne's Hana: https://github.com/ldionne/hana
 # - Paul Fultz II's FIT: https://github.com/pfultz2/Fit
 # - Eric Niebler's range-v3: https://github.com/ericniebler/range-v3
+sudo: required
 language: cpp
 
-# Test matrix:
-# - Build matrix per compiler: C++11/C++14 + Debug/Release
-# - Optionally: AddressSanitizer (ASAN)
-# - Valgrind: all release builds are also tested with valgrind
-# - clang 3.4, 3.5, 3.6, trunk
-#   - Note: 3.4 and trunk are tested with/without ASAN,
-#     the rest is only tested with ASAN=On.
-# - gcc 4.9, 5.0
-#
+addons: &gcc48
+  apt:
+    packages:
+      - g++-4.8
+    sources:
+      - ubuntu-toolchain-r-test
+
+addons: &gcc7
+  apt:
+    packages:
+      - g++-7
+    sources:
+      - ubuntu-toolchain-r-test
+
+addons: &clang35
+  apt:
+    packages:
+      - clang-3.5
+    sources:
+      - ubuntu-toolchain-r-test
+      - llvm-toolchain-precise-3.5
+
+addons: &clang6
+  apt:
+    packages:
+      - clang-6.0
+    sources:
+      - ubuntu-toolchain-r-test
+      - llvm-toolchain-trusty-6.0
+
+
 matrix:
   include:
-   
-# Test gcc-4.8: C++11, Build=Debug/Release, ASAN=Off
-    - env: GCC_VERSION=4.8 BUILD_TYPE=Debug CPP=11 ASAN=Off LIBCXX=Off
-      os: linux
-      addons: &gcc48
-        apt:
-          packages:
-            - g++-4.8
-            - valgrind
-          sources:
-            - ubuntu-toolchain-r-test
-
-    - env: GCC_VERSION=4.8 BUILD_TYPE=Release CPP=11 ASAN=Off LIBCXX=Off
+    # Test gcc-4.8: C++11, Build=Debug/Release
+    - env: GCC_VERSION=4.8 BUILD_TYPE=Debug CPP=11
       os: linux
       addons: *gcc48
 
-    # Test gcc-4.9: C++11, Build=Debug/Release, ASAN=Off
-    - env: GCC_VERSION=4.9 BUILD_TYPE=Debug CPP=11 ASAN=Off LIBCXX=Off
+    - env: GCC_VERSION=4.8 BUILD_TYPE=Release CPP=11
       os: linux
-      addons: &gcc49
-        apt:
-          packages:
-            - g++-4.9
-            - valgrind
-          sources:
-            - ubuntu-toolchain-r-test
+      addons: *gcc48
   
-    - env: GCC_VERSION=4.9 BUILD_TYPE=Release CPP=11 ASAN=Off LIBCXX=Off
+    - env: GCC_VERSION=7 BUILD_TYPE=Release CPP=11
       os: linux
-      addons: *gcc49
+      addons: *gcc7
 
-# Install dependencies
-before_install:
-  - export CHECKOUT_PATH=`pwd`;
+    # Test clang-3.5: C++11, Build=Debug/Release
+    - env: CLANG_VERSION=3.5 BUILD_TYPE=Debug CPP=11
+      os: linux
+      addons: *clang35
+
+    - env: CLANG_VERSION=3.5 BUILD_TYPE=Release CPP=11
+      os: linux
+      addons: *clang35
+
+      # Test clang-6.0: C++11, Build=Debug, ASAN=On
+    - env: CLANG_VERSION=6.0 BUILD_TYPE=Debug CPP=11 ASAN=On TSAN=Off
+      os: linux
+      addons: *clang6
+      
+    - env: CLANG_VERSION=6.0 BUILD_TYPE=Release CPP=11 ASAN=On TSAN=Off
+      os: linux
+      addons: *clang6
+      
+      # Test clang-6.0: C++11, Build=Debug, TSAN=On
+    - env: CLANG_VERSION=6.0 BUILD_TYPE=Debug CPP=11 ASAN=Off TSAN=On
+      os: linux
+      addons: *clang6
+      
+    - env: CLANG_VERSION=6.0 BUILD_TYPE=Release CPP=11 ASAN=Off TSAN=On
+      os: linux
+      addons: *clang6
+
+      # osx
+    - env: BUILD_TYPE=Release CPP=11 ASAN=Off TSAN=Off
+      os: osx
+    
+
+
+
+before_script:
   - if [ -n "$GCC_VERSION" ]; then export CXX="g++-${GCC_VERSION}" CC="gcc-${GCC_VERSION}"; fi
   - if [ -n "$CLANG_VERSION" ]; then export CXX="clang++-${CLANG_VERSION}" CC="clang-${CLANG_VERSION}"; fi
-  - if [ "$CLANG_VERSION" == "3.4" ]; then export CXX="/usr/local/clang-3.4/bin/clang++" CC="/usr/local/clang-3.4/bin/clang"; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then export CXX="clang++" CC="clang"; fi
   - which $CXX
   - which $CC
-  - which valgrind
-  - if [ -n "$CLANG_VERSION" ]; then sudo CXX=$CXX CC=$CC ./tests/install_libcxx.sh; fi
-
-install:
-  - cd $CHECKOUT_PATH
-
-  # Workaround for valgrind bug: https://bugs.kde.org/show_bug.cgi?id=326469.
-  # It is fixed in valgrind 3.10 so this won't be necessary if someone
-  # replaces the current valgrind (3.7) with valgrind-3.10
-  - sed -i 's/march=native/msse4.2/' example/Makefile
-
-  - if [ ! -d build ]; then mkdir build; fi
-  - export CXX_FLAGS="-I${CHECKOUT_PATH}/include"
-  - export CXX_LINKER_FLAGS=""
-  - if [ -z "$BUILD_TYPE" ]; then export BUILD_TYPE=Release; fi
-  - if [ "$ASAN" == "On"]; then export CXX_FLAGS="${CXX_FLAGS} -fsanitize=address,undefined,integer -fno-omit-frame-pointer -fno-sanitize=unsigned-integer-overflow"; fi
-  - if [ -n "$CLANG_VERSION" ]; then CXX_FLAGS="${CXX_FLAGS} -D__extern_always_inline=inline"; fi
-  - if [ "$LIBCXX" == "On" ]; then CXX_FLAGS="${CXX_FLAGS} -stdlib=libc++ -I/usr/include/c++/v1/"; fi
-  - if [ "$LIBCXX" == "On" ]; then CXX_LINKER_FLAGS="${CXX_FLAGS} -L/usr/lib/ -lc++"; fi
-  - CXX_FLAGS="${CXX_FLAGS} -std=c++${CPP}"
-
-  # Build examples
-  - cd example
-  - if [ "$BUILD_TYPE" == "Release" ]; then make rebuild CXXFLAGS="${CXX_FLAGS} ${CXX_LINKER_FLAGS}" VERBOSE=1; export BIN=example; fi
-  - if [ "$BUILD_TYPE" == "Debug" ]; then make rebuild debug CXXFLAGS="${CXX_FLAGS} ${CXX_LINKER_FLAGS}" VERBOSE=1; export BIN=example-debug; fi
-  
+  - $CXX --version
+  - cmake --version
 
 script:
-  - ./"${BIN}"
-  - valgrind --trace-children=yes --leak-check=full ./"${BIN}"
-  - cd $CHECKOUT_PATH/tests; make rebuild; ./tests
-  - cd $CHECKOUT_PATH/tests; STYLE=printf make rebuild; ./tests
+  - cd ${TRAVIS_BUILD_DIR}
+  - mkdir -p build && cd build
+  - |
+    cmake .. \
+      --warn-uninitialized \
+      -DCMAKE_BUILD_TYPE=$BUILD_TYPE \
+      -DCMAKE_CXX_STANDARD=$CPP \
+      -DSPDLOG_BUILD_EXAMPLES=ON \
+      -DSPDLOG_BUILD_BENCH=OFF \
+      -DSPDLOG_SANITIZE_ADDRESS=$ASAN \
+      -DSPDLOG_SANITIZE_THREAD=$TSAN
+  - make VERBOSE=1 -j2
+  - ctest -j2 --output-on-failure
+
+
 
 notifications:
   email: false

CMakeLists.txt

@@ -4,29 +4,58 @@
 #
 
 cmake_minimum_required(VERSION 3.1)
-project(spdlog VERSION 1.0.0 LANGUAGES CXX)
+project(spdlog VERSION 1.2.0 LANGUAGES CXX)
 include(CTest)
 include(CMakeDependentOption)
 include(GNUInstallDirs)
 
+#---------------------------------------------------------------------------------------
+# set default build to release
+#---------------------------------------------------------------------------------------
+if(NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose Release or Debug" FORCE)
+endif()
+
+message(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
+
 #---------------------------------------------------------------------------------------
 # compiler config
 #---------------------------------------------------------------------------------------
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
 
 if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-    set(CMAKE_CXX_FLAGS "-Wall -O3 ${CMAKE_CXX_FLAGS}")
+    add_compile_options("-Wall")
+    add_compile_options("-Wextra")
+    add_compile_options("-Wconversion")
+    add_compile_options("-pedantic")
+    add_compile_options("-Wfatal-errors")
+    
 endif()
 
+#---------------------------------------------------------------------------------------
+# address sanitizers check
+#---------------------------------------------------------------------------------------
+include(cmake/sanitizers.cmake)
+
 #---------------------------------------------------------------------------------------
 # spdlog target
 #---------------------------------------------------------------------------------------
 add_library(spdlog INTERFACE)
+add_library(spdlog::spdlog ALIAS spdlog)
+
+# Check if spdlog is being used directly or via add_subdirectory
+set(SPDLOG_MASTER_PROJECT OFF)
+if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+  set(SPDLOG_MASTER_PROJECT ON)
+endif()
+
+option(SPDLOG_BUILD_EXAMPLES "Build examples" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_BUILD_BENCH "Build benchmarks" ${SPDLOG_MASTER_PROJECT})
 
-option(SPDLOG_BUILD_EXAMPLES "Build examples" OFF)
 cmake_dependent_option(SPDLOG_BUILD_TESTING
-    "Build spdlog tests" ON
+    "Build spdlog tests" ${SPDLOG_MASTER_PROJECT}
     "BUILD_TESTING" OFF
 )
 
@@ -47,6 +76,10 @@ if(SPDLOG_BUILD_TESTING)
     add_subdirectory(tests)
 endif()
 
+if(SPDLOG_BUILD_BENCH)
+    add_subdirectory(bench)
+endif()
+
 #---------------------------------------------------------------------------------------
 # Install/export targets and files
 #---------------------------------------------------------------------------------------

README.md

@@ -3,6 +3,7 @@
 Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.org/gabime/spdlog.svg?branch=master)](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)
 
 
+
 ## Install
 #### Just copy the headers:
 
@@ -20,18 +21,17 @@ Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.
  
 
 ## Platforms
- * Linux, FreeBSD, Solaris, AIX
- * Windows (vc 2013+, cygwin)
- * Mac OSX (clang 3.5+)
+ * Linux, FreeBSD, OpenBSD, Solaris, AIX
+ * Windows (msvc 2013+, cygwin)
+ * macOS (clang 3.5+)
  * Android
 
 ## Features
-* Very fast - performance is the primary goal (see [benchmarks](#benchmarks) below).
+* Very fast (see [benchmarks](#benchmarks) below).
 * Headers only, just copy and use.
-* Feature rich [call style](#usage-example) using the excellent [fmt](https://github.com/fmtlib/fmt) library.
+* Feature rich formatting, using the excellent [fmt](https://github.com/fmtlib/fmt) library.
 * Fast asynchronous mode (optional)
 * [Custom](https://github.com/gabime/spdlog/wiki/3.-Custom-formatting) formatting.
-* Conditional Logging
 * Multi/Single threaded loggers.
 * Various log targets:
     * Rotating log files.
@@ -41,7 +41,7 @@ Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.
     * Windows debugger (```OutputDebugString(..)```)
     * Easily extendable with custom log targets  (just implement a single function in the [sink](include/spdlog/sinks/sink.h) interface).
 * Severity based filtering - threshold levels can be modified in runtime as well as in compile time.
-
+* Binary data logging.
 
 
 ## Benchmarks
@@ -53,27 +53,26 @@ Below are some [benchmarks](https://github.com/gabime/spdlog/blob/v1.x/bench/ben
 *******************************************************************************
 Single thread, 1,000,000 iterations
 *******************************************************************************
-basic_st...		Elapsed: 0.231041	4,328,228/sec
-rotating...             Elapsed: 0.233466	4,283,282/sec
-daily_st...		Elapsed: 0.244491	4,090,136/sec
-null_st...		Elapsed: 0.162708	6,145,995/sec
-
+basic_st...             Elapsed: 0.181652       5,505,042/sec
+rotating_st...          Elapsed: 0.181781       5,501,117/sec
+daily_st...             Elapsed: 0.187595       5,330,630/sec
+null_st...              Elapsed: 0.0504704      19,813,602/sec
 *******************************************************************************
 10 threads sharing same logger, 1,000,000 iterations
 *******************************************************************************
-basic_mt...		Elapsed: 0.854029	1,170,920/sec
-rotating_mt		Elapsed: 0.867038	1,153,351/sec
-daily_mt...		Elapsed: 0.869593	1,149,963/sec
-null_mt...		Elapsed: 0.171215	2,033,537/sec
+basic_mt...             Elapsed: 0.616035       1,623,284/sec
+rotating_mt...          Elapsed: 0.620344       1,612,008/sec
+daily_mt...             Elapsed: 0.648353       1,542,369/sec
+null_mt...              Elapsed: 0.151972       6,580,166/sec
 ``` 
 #### Asynchronous mode
 ```
 *******************************************************************************
 10 threads sharing same logger, 1,000,000 iterations 
 *******************************************************************************
-async...		Elapsed: 0.442731	2,258,706/sec
-async...		Elapsed: 0.427072	2,341,527/sec
-async...		Elapsed: 0.449768	2,223,369/sec
+async...                Elapsed: 0.350066       2,856,606/sec
+async...                Elapsed: 0.314865       3,175,960/sec
+async...                Elapsed: 0.349851       2,858,358/sec
 ```
 
 ## Usage samples
@@ -129,7 +128,6 @@ void basic_logfile_example()
     catch (const spdlog::spdlog_ex &ex)
     {
         std::cout << "Log init failed: " << ex.what() << std::endl;
-        return 1;
     }
 }
 ```
@@ -157,6 +155,18 @@ void daily_example()
 
 ```
 
+---
+#### Cloning loggers 
+```c++
+// clone a logger and give it new name.
+// Useful for creating subsystem loggers from some "root" logger
+void clone_example()
+{
+    auto network_logger = spdlog::get("root")->clone("network");
+    network_logger->info("Logging network stuff..");
+}
+```
+
 ---
 #### Periodic flush
 ```c++
@@ -167,21 +177,35 @@ spdlog::flush_every(std::chrono::seconds(3));
 ```
 
 ---
-#### Asynchronous logging
+#### Binary logging
 ```c++
-#include "spdlog/async.h"
-void async_example()
+// log binary data as hex.
+// many types of std::container<char> types can be used.
+// ranges are supported too.
+// format flags:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+
+#include "spdlog/fmt/bin_to_hex.h"
+
+void binary_example()
 {
-    // default thread pool settings can be modified *before* creating the async logger:
-    // spdlog::init_thread_pool(8192, 1); // queue with 8k items and 1 backing thread.
-    auto async_file = spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
-    // alternatively:
-    // auto async_file = spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger", "logs/async_log.txt");   
+    auto console = spdlog::get("console");
+    std::array<char, 80> buf;
+    console->info("Binary example: {}", spdlog::to_hex(buf));
+    console->info("Another binary example:{:n}", spdlog::to_hex(std::begin(buf), std::begin(buf) + 10));
+    // more examples:
+    // logger->info("uppercase: {:X}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters: {:Xs}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters, no position info: {:Xsp}", spdlog::to_hex(buf));
 }
 
 ```
+
 ---
-#### Logger with multi targets - each with different format and log level
+#### Logger with multi sinks - each with different format and log level
 ```c++
 
 // create logger with 2 targets with different log levels and formats.
@@ -201,6 +225,40 @@ void multi_sink_example()
     logger.info("this message should not appear in the console, only in the file");
 }
 ```
+
+---
+#### Asynchronous logging
+```c++
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
+void async_example()
+{
+    // default thread pool settings can be modified *before* creating the async logger:
+    // spdlog::init_thread_pool(8192, 1); // queue with 8k items and 1 backing thread.
+    auto async_file = spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
+    // alternatively:
+    // auto async_file = spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger", "logs/async_log.txt");   
+}
+
+```
+
+---
+#### Asynchronous logger with multi sinks  
+```c++
+#include "spdlog/sinks/stdout_color_sinks.h"
+#include "spdlog/sinks/rotating_file_sink.h"
+
+void multi_sink_example2()
+{
+    spdlog::init_thread_pool(8192, 1);
+    auto stdout_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt >();
+    auto rotating_sink = std::make_shared<spdlog::sinks::rotating_file_sink_mt>("mylog.txt", 1024*1024*10, 3);
+    std::vector<spdlog::sink_ptr> sinks {stdout_sink, rotating_sink};
+    auto logger = std::make_shared<spdlog::async_logger>("loggername", sinks.begin(), sinks.end(), spdlog::thread_pool(), spdlog::async_overflow_policy::block);
+    spdlog::register_logger(logger);
+}
+```
+ 
 ---
 #### User defined types
 ```c++
@@ -240,7 +298,7 @@ void err_handler_example()
 void syslog_example()
 {
     std::string ident = "spdlog-example";
-    auto syslog_logger = spdlog::syslog_logger("syslog", ident, LOG_PID);
+    auto syslog_logger = spdlog::syslog_logger_mt("syslog", ident, LOG_PID);
     syslog_logger->warn("This is warning that will end up in syslog.");
 }
 ```

bench/CMakeLists.txt

@@ -0,0 +1,43 @@
+# *************************************************************************/
+# * Copyright (c) 2015 Ruslan Baratov.                                    */
+# *                                                                       */
+# * 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.                */
+# *************************************************************************/
+
+cmake_minimum_required(VERSION 3.1)
+project(SpdlogBench CXX)
+
+if(NOT TARGET spdlog)
+  # Stand-alone build
+  find_package(spdlog CONFIG REQUIRED)
+endif()
+
+find_package(Threads REQUIRED)
+
+add_executable(bench bench.cpp)
+target_link_libraries(bench spdlog::spdlog Threads::Threads)
+
+add_executable(async_bench async_bench.cpp)
+target_link_libraries(async_bench spdlog::spdlog Threads::Threads)
+
+add_executable(latency latency.cpp)
+target_link_libraries(latency spdlog::spdlog Threads::Threads)
+
+file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")

bench/async_bench.cpp

@@ -35,6 +35,7 @@ int count_lines(const char *filename)
         if ('\n' == ch)
             counter++;
     }
+    fclose(infile);
 
     return counter;
 }

bench/bench.cpp

@@ -35,8 +35,8 @@ int main(int argc, char *argv[])
     int howmany = 1000000;
     int queue_size = howmany + 2;
     int threads = 10;
-    int file_size = 30 * 1024 * 1024;
-    int rotating_files = 5;
+    size_t file_size = 30 * 1024 * 1024;
+    size_t rotating_files = 5;
 
     try
     {
@@ -54,7 +54,7 @@ int main(int argc, char *argv[])
         cout << "******************************************************************"
                 "*************\n";
 
-        auto basic_st = spdlog::basic_logger_mt("basic_st", "logs/basic_st.log", true);
+        auto basic_st = spdlog::basic_logger_st("basic_st", "logs/basic_st.log", true);
         bench(howmany, basic_st);
 
         auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st.log", file_size, rotating_files);
@@ -89,7 +89,7 @@ int main(int argc, char *argv[])
 
         for (int i = 0; i < 3; ++i)
         {
-            spdlog::init_thread_pool(queue_size, 1);
+            spdlog::init_thread_pool(static_cast<size_t>(queue_size), 1);
             auto as = spdlog::basic_logger_mt<spdlog::async_factory>("async", "logs/basic_async.log", true);
             bench_mt(howmany, as, threads);
             spdlog::drop("async");

bench/latency.cpp

@@ -35,8 +35,8 @@ int main(int, char *[])
     int howmany = 1000000;
     int queue_size = howmany + 2;
     int threads = 10;
-    int file_size = 30 * 1024 * 1024;
-    int rotating_files = 5;
+    size_t file_size = 30 * 1024 * 1024;
+    size_t rotating_files = 5;
 
     try
     {
@@ -82,7 +82,7 @@ int main(int, char *[])
 
         for (int i = 0; i < 3; ++i)
         {
-            spdlog::init_thread_pool(queue_size, 1);
+            spdlog::init_thread_pool(static_cast<size_t>(queue_size), 1);
             auto as = spdlog::basic_logger_mt<spdlog::async_factory>("async", "logs/basic_async.log", true);
             bench_mt(howmany, as, threads);
             spdlog::drop("async");

clang_tidy.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+clang-tidy example/example.cpp -- -I ./include 

cmake/sanitizers.cmake

@@ -0,0 +1,21 @@
+if(SPDLOG_SANITIZE_THREAD AND SPDLOG_SANITIZE_ADDRESS)
+    message(FATAL_ERROR "AddressSanitizer is not compatible with ThreadSanitizer.")
+endif()
+
+if(SPDLOG_SANITIZE_ADDRESS)
+    message(STATUS "AddressSanitizer enabled")
+    set(SANITIZER_FLAGS "-fsanitize=address,undefined")
+    add_compile_options("-fno-sanitize=signed-integer-overflow")
+endif()
+
+if(SPDLOG_SANITIZE_THREAD)
+    message(STATUS "ThreadSanitizer enabled")
+    set(SANITIZER_FLAGS "-fsanitize=thread")
+endif()
+
+if(SPDLOG_SANITIZE_THREAD OR SPDLOG_SANITIZE_ADDRESS)
+    add_compile_options(${SANITIZER_FLAGS})
+    add_compile_options("-fno-sanitize-recover=all")
+    add_compile_options("-fno-omit-frame-pointer")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${SANITIZER_FLAGS} -fuse-ld=gold")
+endif()

example/CMakeLists.txt

@@ -24,10 +24,7 @@
 cmake_minimum_required(VERSION 3.1)
 project(SpdlogExamples CXX)
 
-if(TARGET spdlog)
-  # Part of the main project
-  add_library(spdlog::spdlog ALIAS spdlog)
-else()
+if(NOT TARGET spdlog)
   # Stand-alone build
   find_package(spdlog CONFIG REQUIRED)
 endif()
@@ -37,13 +34,10 @@ find_package(Threads REQUIRED)
 add_executable(example example.cpp)
 target_link_libraries(example spdlog::spdlog Threads::Threads)
 
-add_executable(benchmark bench.cpp)
-target_link_libraries(benchmark spdlog::spdlog Threads::Threads)
-
 add_executable(multisink multisink.cpp)
 target_link_libraries(multisink spdlog::spdlog Threads::Threads)
 
-enable_testing()
 file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")
-add_test(NAME RunExample COMMAND example)
-add_test(NAME RunBenchmark COMMAND benchmark)
+
+enable_testing()
+add_test(NAME example COMMAND example)

example/Makefile

@@ -1,5 +1,5 @@
 CXX	?= g++
-CXX_FLAGS = -Wall -Wextra -pedantic -std=c++11 -pthread -I../include -fmax-errors=1
+CXX_FLAGS = -Wall -Wextra -pedantic -std=c++11 -pthread -I../include -fmax-errors=1 -Wconversion
 CXX_RELEASE_FLAGS = -O3 -march=native
 CXX_DEBUG_FLAGS= -g
 

example/Makefile-all-warn

@@ -0,0 +1,22 @@
+#-Weverything -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-padded
+CXX	?= g++
+CXX_FLAGS = -Wall -Wextra -pedantic -std=c++11 -pthread -I../include -fmax-errors=1 -Wconversion -Weverything -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-padded -Wno-weak-vtables -Wno-global-constructors
+CXX_RELEASE_FLAGS = -O3 -march=native
+CXX_DEBUG_FLAGS= -g
+
+all:	example 
+debug:	example-debug
+
+example: example.cpp
+	$(CXX) example.cpp -o example $(CXX_FLAGS) $(CXX_RELEASE_FLAGS) $(CXXFLAGS)
+
+
+example-debug: example.cpp
+	$(CXX) example.cpp -o example-debug $(CXX_FLAGS) $(CXX_DEBUG_FLAGS) $(CXXFLAGS)
+
+clean:
+	rm -f *.o logs/*.txt example example-debug
+
+
+rebuild: clean all
+rebuild-debug: clean debug

example/example.cpp

@@ -14,10 +14,12 @@ void basic_example();
 void rotating_example();
 void daily_example();
 void async_example();
+void binary_example();
 void multi_sink_example();
 void user_defined_example();
 void err_handler_example();
 void syslog_example();
+void clone_example();
 
 #include "spdlog/spdlog.h"
 
@@ -34,9 +36,14 @@ int main(int, char *[])
         rotating_example();
         daily_example();
 
+        clone_example();
+
         // async logging using a backing thread pool
         async_example();
 
+        // log binary data
+        binary_example();
+
         // a logger can have multiple targets with different formats
         multi_sink_example();
 
@@ -94,6 +101,7 @@ void stdout_example()
     // Customize msg format for all loggers
     spdlog::set_pattern("[%H:%M:%S %z] [%n] [%^---%L---%$] [thread %t] %v");
     console->info("This an info message with custom format");
+    spdlog::set_pattern("%+"); // back to default format
 
     // Compile time log levels
     // define SPDLOG_DEBUG_ON or SPDLOG_TRACE_ON
@@ -122,6 +130,14 @@ void daily_example()
     auto daily_logger = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
 }
 
+// clone a logger and give it new name.
+// Useful for creating component/subsystem loggers from some "root" logger
+void clone_example()
+{
+    auto network_logger = spdlog::get("console")->clone("network");
+    network_logger->info("Logging network stuff..");
+}
+
 #include "spdlog/async.h"
 void async_example()
 {
@@ -137,6 +153,29 @@ void async_example()
     }
 }
 
+// log binary data as hex.
+// many types of std::container<char> types can be used.
+// ranges are supported too.
+// format flags:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+
+#include "spdlog/fmt/bin_to_hex.h"
+
+void binary_example()
+{
+    auto console = spdlog::get("console");
+    std::array<char, 80> buf;
+    console->info("Binary example: {}", spdlog::to_hex(buf));
+    console->info("Another binary example:{:n}", spdlog::to_hex(std::begin(buf), std::begin(buf) + 10));
+    // more examples:
+    // logger->info("uppercase: {:X}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters: {:Xs}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters, no position info: {:Xsp}", spdlog::to_hex(buf));
+}
+
 // create logger with 2 targets with different log levels and formats
 // the console will show only warnings or errors, while the file will log all
 

example/multisink.cpp

@@ -1,10 +1,9 @@
-#include "spdlog/sinks/file_sinks.h"
+#include "spdlog/sinks/basic_file_sink.h"
 #include "spdlog/sinks/stdout_sinks.h"
 #include "spdlog/spdlog.h"
 #include <iostream>
 #include <memory>
 
-namespace spd = spdlog;
 int main(int, char *[])
 {
     bool enable_debug = true;
@@ -39,7 +38,7 @@ int main(int, char *[])
         spdlog::drop_all();
     }
     // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
-    catch (const spd::spdlog_ex &ex)
+    catch (const spdlog::spdlog_ex &ex)
     {
         std::cout << "Log init failed: " << ex.what() << std::endl;
         return 1;

format.sh

@@ -1,9 +1,9 @@
 #!/bin/bash
 echo -n "Running dos2unix     "
-find . -name "*\.h" -o -name "*\.cpp"|xargs -I {} sh -c "dos2unix '{}' 2>/dev/null; echo -n '.'"
+find . -name "*\.h" -o -name "*\.cpp"|grep -v bundled|xargs -I {} sh -c "dos2unix '{}' 2>/dev/null; echo -n '.'"
 echo
 echo -n "Running clang-format "
-find . -name "*\.h" -o -name "*\.cpp"|xargs -I {} sh -c "clang-format -i {}; echo -n '.'"
+find . -name "*\.h" -o -name "*\.cpp"|grep -v bundled|xargs -I {} sh -c "clang-format -i {}; echo -n '.'"
 echo
 
 

include/spdlog/async.h

@@ -42,7 +42,7 @@ struct async_factory_impl
         auto &registry_inst = details::registry::instance();
 
         // create global thread pool if not already exists..
-        std::lock_guard<std::recursive_mutex>(registry_inst.tp_mutex());
+        std::lock_guard<std::recursive_mutex> tp_lock(registry_inst.tp_mutex());
         auto tp = registry_inst.get_tp();
         if (tp == nullptr)
         {

include/spdlog/async_logger.h

@@ -40,26 +40,28 @@ namespace details {
 class thread_pool;
 }
 
-class async_logger SPDLOG_FINAL : public std::enable_shared_from_this<async_logger>, public logger
+class async_logger final : public std::enable_shared_from_this<async_logger>, public logger
 {
     friend class details::thread_pool;
 
 public:
     template<typename It>
-    async_logger(std::string logger_name, const It &begin, const It &end, std::weak_ptr<details::thread_pool> tp,
+    async_logger(std::string logger_name, It begin, It end, std::weak_ptr<details::thread_pool> tp,
         async_overflow_policy overflow_policy = async_overflow_policy::block);
 
-    async_logger(std::string logger_name, sinks_init_list sinks, std::weak_ptr<details::thread_pool> tp,
+    async_logger(std::string logger_name, sinks_init_list sinks_list, std::weak_ptr<details::thread_pool> tp,
         async_overflow_policy overflow_policy = async_overflow_policy::block);
 
     async_logger(std::string logger_name, sink_ptr single_sink, std::weak_ptr<details::thread_pool> tp,
         async_overflow_policy overflow_policy = async_overflow_policy::block);
 
+    std::shared_ptr<logger> clone(std::string new_name) override;
+
 protected:
     void sink_it_(details::log_msg &msg) override;
     void flush_() override;
 
-    void backend_log_(details::log_msg &incoming_log_msg);
+    void backend_log_(const details::log_msg &incoming_log_msg);
     void backend_flush_();
 
 private:

include/spdlog/common.h

@@ -14,6 +14,7 @@
 #include <memory>
 #include <stdexcept>
 #include <string>
+#include <type_traits>
 #include <unordered_map>
 
 #if defined(SPDLOG_WCHAR_FILENAMES) || defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT)
@@ -32,13 +33,6 @@
 #define SPDLOG_CONSTEXPR constexpr
 #endif
 
-// final keyword support. On by default. See tweakme.h
-#if defined(SPDLOG_NO_FINAL)
-#define SPDLOG_FINAL
-#else
-#define SPDLOG_FINAL final
-#endif
-
 #if defined(__GNUC__) || defined(__clang__)
 #define SPDLOG_DEPRECATED __attribute__((deprecated))
 #elif defined(_MSC_VER)
@@ -100,6 +94,7 @@ inline const char *to_short_c_str(spdlog::level::level_enum l)
 {
     return short_level_names[l];
 }
+
 inline spdlog::level::level_enum from_str(const std::string &name)
 {
     static std::unordered_map<std::string, level_enum> name_to_level = // map string->level
@@ -131,35 +126,28 @@ enum class pattern_time_type
 //
 // Log exception
 //
-class spdlog_ex : public std::runtime_error
+class spdlog_ex : public std::exception
 {
 public:
-    explicit spdlog_ex(const std::string &msg)
-        : runtime_error(msg)
+    explicit spdlog_ex(std::string msg)
+        : msg_(std::move(msg))
     {
     }
-    spdlog_ex(std::string msg, int last_errno)
-        : runtime_error(std::move(msg))
-        , last_errno_(last_errno)
+
+    spdlog_ex(const std::string &msg, int last_errno)
     {
+        fmt::memory_buffer outbuf;
+        fmt::format_system_error(outbuf, last_errno, msg);
+        msg_ = fmt::to_string(outbuf);
     }
+
     const char *what() const SPDLOG_NOEXCEPT override
     {
-        if (last_errno_)
-        {
-            fmt::memory_buffer buf;
-            std::string msg(runtime_error::what());
-            fmt::format_system_error(buf, last_errno_, msg);
-            return fmt::to_string(buf).c_str();
-        }
-        else
-        {
-            return runtime_error::what();
-        }
+        return msg_.c_str();
     }
 
 private:
-    int last_errno_{0};
+    std::string msg_;
 };
 
 //
@@ -180,4 +168,19 @@ using filename_t = std::string;
     {                                                                                                                                      \
         err_handler_("Unknown exeption in logger");                                                                                        \
     }
+
+namespace details {
+// make_unique support for pre c++14
+
+#if __cplusplus >= 201402L // C++14 and beyond
+using std::make_unique;
+#else
+template<typename T, typename... Args>
+std::unique_ptr<T> make_unique(Args &&... args)
+{
+    static_assert(!std::is_array<T>::value, "arrays not supported");
+    return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
+#endif
+} // namespace details
 } // namespace spdlog

include/spdlog/details/async_logger_impl.h

@@ -16,7 +16,7 @@
 
 template<typename It>
 inline spdlog::async_logger::async_logger(
-    std::string logger_name, const It &begin, const It &end, std::weak_ptr<details::thread_pool> tp, async_overflow_policy overflow_policy)
+    std::string logger_name, It begin, It end, std::weak_ptr<details::thread_pool> tp, async_overflow_policy overflow_policy)
     : logger(std::move(logger_name), begin, end)
     , thread_pool_(tp)
     , overflow_policy_(overflow_policy)
@@ -47,7 +47,7 @@ inline void spdlog::async_logger::sink_it_(details::log_msg &msg)
     }
     else
     {
-        throw spdlog_ex("async log: thread pool doens't exist anymore");
+        throw spdlog_ex("async log: thread pool doesn't exist anymore");
     }
 }
 
@@ -67,7 +67,7 @@ inline void spdlog::async_logger::flush_()
 //
 // backend functions - called from the thread pool to do the actual job
 //
-inline void spdlog::async_logger::backend_log_(details::log_msg &incoming_log_msg)
+inline void spdlog::async_logger::backend_log_(const details::log_msg &incoming_log_msg)
 {
     try
     {
@@ -98,3 +98,13 @@ inline void spdlog::async_logger::backend_flush_()
     }
     SPDLOG_CATCH_AND_HANDLE
 }
+
+inline std::shared_ptr<spdlog::logger> spdlog::async_logger::clone(std::string new_name)
+{
+    auto cloned = std::make_shared<spdlog::async_logger>(std::move(new_name), sinks_.begin(), sinks_.end(), thread_pool_, overflow_policy_);
+
+    cloned->set_level(this->level());
+    cloned->flush_on(this->flush_level());
+    cloned->set_error_handler(this->error_handler());
+    return std::move(cloned);
+}

include/spdlog/details/circular_q.h

@@ -6,6 +6,8 @@
 // cirucal q view of std::vector.
 #pragma once
 
+#include <vector>
+
 namespace spdlog {
 namespace details {
 template<typename T>
@@ -29,6 +31,7 @@ public:
         if (tail_ == head_) // overrun last item if full
         {
             head_ = (head_ + 1) % max_items_;
+            ++overrun_counter_;
         }
     }
 
@@ -51,12 +54,19 @@ public:
         return ((tail_ + 1) % max_items_) == head_;
     }
 
+    size_t overrun_counter() const
+    {
+        return overrun_counter_;
+    }
+
 private:
     size_t max_items_;
     typename std::vector<T>::size_type head_ = 0;
     typename std::vector<T>::size_type tail_ = 0;
 
     std::vector<T> v_;
+
+    size_t overrun_counter_ = 0;
 };
 } // namespace details
 } // namespace spdlog

include/spdlog/details/console_globals.h

@@ -5,14 +5,27 @@
 //
 
 #include "spdlog/details/null_mutex.h"
-#include "stdio.h"
+#include <cstdio>
 #include <mutex>
 
+#ifdef _WIN32
+
+#ifndef NOMINMAX
+#define NOMINMAX // prevent windows redefining min/max
+#endif
+
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+
+#include <windows.h>
+#endif
+
 namespace spdlog {
 namespace details {
 struct console_stdout
 {
-    static FILE *stream()
+    static std::FILE *stream()
     {
         return stdout;
     }
@@ -26,7 +39,7 @@ struct console_stdout
 
 struct console_stderr
 {
-    static FILE *stream()
+    static std::FILE *stream()
     {
         return stderr;
     }

include/spdlog/details/file_helper.h

@@ -5,13 +5,12 @@
 
 #pragma once
 
-// Helper class for file sink
-// When failing to open a file, retry several times(5) with small delay between
-// the tries(10 ms)
-// Throw spdlog_ex exception on errors
+// Helper class for file sinks.
+// When failing to open a file, retry several times(5) with a delay interval(10 ms).
+// Throw spdlog_ex exception on errors.
 
-#include "../details/log_msg.h"
-#include "../details/os.h"
+#include "spdlog/details/log_msg.h"
+#include "spdlog/details/os.h"
 
 #include <cerrno>
 #include <chrono>
@@ -136,7 +135,7 @@ public:
 
         // treat casese like "/etc/rc.d/somelogfile or "/abc/.hiddenfile"
         auto folder_index = fname.rfind(details::os::folder_sep);
-        if (folder_index != fname.npos && folder_index >= ext_index - 1)
+        if (folder_index != filename_t::npos && folder_index >= ext_index - 1)
         {
             return std::make_tuple(fname, spdlog::filename_t());
         }
@@ -146,7 +145,7 @@ public:
     }
 
 private:
-    FILE *fd_{nullptr};
+    std::FILE *fd_{nullptr};
     filename_t _filename;
 };
 } // namespace details

include/spdlog/details/fmt_helper.h

@@ -22,12 +22,8 @@ inline void append_str(const std::string &str, fmt::basic_memory_buffer<char, Bu
 template<size_t Buffer_Size>
 inline void append_c_str(const char *c_str, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
 {
-    char ch;
-    while ((ch = *c_str) != '\0')
-    {
-        dest.push_back(ch);
-        ++c_str;
-    }
+    auto len = std::char_traits<char>::length(c_str);
+    dest.append(c_str, c_str + len);
 }
 
 template<size_t Buffer_Size1, size_t Buffer_Size2>
@@ -54,14 +50,14 @@ inline void pad2(int n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
     }
     if (n > 9) // 10-99
     {
-        dest.push_back('0' + static_cast<char>(n / 10));
-        dest.push_back('0' + static_cast<char>(n % 10));
+        dest.push_back(static_cast<char>('0' + n / 10));
+        dest.push_back(static_cast<char>('0' + n % 10));
         return;
     }
     if (n >= 0) // 0-9
     {
         dest.push_back('0');
-        dest.push_back('0' + static_cast<char>(n));
+        dest.push_back(static_cast<char>('0' + n));
         return;
     }
     // negatives (unlikely, but just in case, let fmt deal with it)
@@ -79,22 +75,22 @@ inline void pad3(int n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
 
     if (n > 99) // 100-999
     {
-        append_int(n / 100, dest);
+        dest.push_back(static_cast<char>('0' + n / 100));
         pad2(n % 100, dest);
         return;
     }
     if (n > 9) // 10-99
     {
         dest.push_back('0');
-        dest.push_back('0' + static_cast<char>(n / 10));
-        dest.push_back('0' + static_cast<char>(n % 10));
+        dest.push_back(static_cast<char>('0' + n / 10));
+        dest.push_back(static_cast<char>('0' + n % 10));
         return;
     }
     if (n >= 0)
     {
         dest.push_back('0');
         dest.push_back('0');
-        dest.push_back('0' + static_cast<char>(n));
+        dest.push_back(static_cast<char>('0' + n));
         return;
     }
     // negatives (unlikely, but just in case let fmt deal with it)
@@ -119,7 +115,8 @@ inline void pad6(size_t n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
 template<typename ToDuration>
 inline ToDuration time_fraction(const log_clock::time_point &tp)
 {
-    using namespace std::chrono;
+    using std::chrono::duration_cast;
+    using std::chrono::seconds;
     auto duration = tp.time_since_epoch();
     auto secs = duration_cast<seconds>(duration);
     return duration_cast<ToDuration>(duration) - duration_cast<ToDuration>(secs);

include/spdlog/details/log_msg.h

@@ -16,17 +16,18 @@ namespace details {
 struct log_msg
 {
     log_msg() = default;
+
     log_msg(const std::string *loggers_name, level::level_enum lvl)
         : logger_name(loggers_name)
         , level(lvl)
-    {
 #ifndef SPDLOG_NO_DATETIME
-        time = os::now();
+        , time(os::now())
 #endif
 
 #ifndef SPDLOG_NO_THREAD_ID
-        thread_id = os::thread_id();
+        , thread_id(os::thread_id())
 #endif
+    {
     }
 
     log_msg(const log_msg &other) = delete;
@@ -38,8 +39,9 @@ struct log_msg
     log_clock::time_point time;
     size_t thread_id;
     fmt::memory_buffer raw;
-    size_t msg_id{0};
-    // info about wrapping the formatted text with color
+    size_t msg_id;
+
+    // info about wrapping the formatted text with color (updated by pattern_formatter).
     mutable size_t color_range_start{0};
     mutable size_t color_range_end{0};
 };

include/spdlog/details/logger_impl.h

@@ -5,13 +5,15 @@
 
 #pragma once
 
+#include "spdlog/details/fmt_helper.h"
+
 #include <memory>
 #include <string>
 
 // create logger with given name, sinks and the default pattern formatter
 // all other ctors will call this one
 template<typename It>
-inline spdlog::logger::logger(std::string logger_name, const It &begin, const It &end)
+inline spdlog::logger::logger(std::string logger_name, It begin, It end)
     : name_(std::move(logger_name))
     , sinks_(begin, end)
     , level_(level::info)
@@ -47,7 +49,8 @@ inline void spdlog::logger::set_formatter(std::unique_ptr<spdlog::formatter> f)
 
 inline void spdlog::logger::set_pattern(std::string pattern, pattern_time_type time_type)
 {
-    set_formatter(std::unique_ptr<spdlog::formatter>(new pattern_formatter(std::move(pattern), time_type)));
+    auto new_formatter = details::make_unique<spdlog::pattern_formatter>(std::move(pattern), time_type);
+    set_formatter(std::move(new_formatter));
 }
 
 template<typename... Args>
@@ -77,7 +80,7 @@ inline void spdlog::logger::log(level::level_enum lvl, const char *msg)
     try
     {
         details::log_msg log_msg(&name_, lvl);
-        fmt::format_to(log_msg.raw, "{}", msg);
+        details::fmt_helper::append_c_str(msg, log_msg.raw);
         sink_it_(log_msg);
     }
     SPDLOG_CATCH_AND_HANDLE
@@ -172,6 +175,28 @@ inline void spdlog::logger::critical(const T &msg)
 }
 
 #ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+
+inline void wbuf_to_utf8buf(const fmt::wmemory_buffer &wbuf, fmt::memory_buffer &target)
+{
+    int wbuf_size = static_cast<int>(wbuf.size());
+    if (wbuf_size == 0)
+    {
+        return;
+    }
+
+    auto result_size = ::WideCharToMultiByte(CP_UTF8, 0, wbuf.data(), wbuf_size, NULL, 0, NULL, NULL);
+
+    if (result_size > 0)
+    {
+        target.resize(result_size);
+        ::WideCharToMultiByte(CP_UTF8, 0, wbuf.data(), wbuf_size, &target.data()[0], result_size, NULL, NULL);
+    }
+    else
+    {
+        throw spdlog::spdlog_ex(fmt::format("WideCharToMultiByte failed. Last error: {}", ::GetLastError()));
+    }
+}
+
 template<typename... Args>
 inline void spdlog::logger::log(level::level_enum lvl, const wchar_t *fmt, const Args &... args)
 {
@@ -180,15 +205,14 @@ inline void spdlog::logger::log(level::level_enum lvl, const wchar_t *fmt, const
         return;
     }
 
-    decltype(wstring_converter_)::byte_string utf8_string;
-
     try
     {
-        {
-            std::lock_guard<std::mutex> lock(wstring_converter_mutex_);
-            utf8_string = wstring_converter_.to_bytes(fmt);
-        }
-        log(lvl, utf8_string.c_str(), args...);
+        // format to wmemory_buffer and convert to utf8
+        details::log_msg log_msg(&name_, lvl);
+        fmt::wmemory_buffer wbuf;
+        fmt::format_to(wbuf, fmt, args...);
+        wbuf_to_utf8buf(wbuf, log_msg.raw);
+        sink_it_(log_msg);
     }
     SPDLOG_CATCH_AND_HANDLE
 }
@@ -268,6 +292,11 @@ inline void spdlog::logger::flush_on(level::level_enum log_level)
     flush_level_.store(log_level);
 }
 
+inline spdlog::level::level_enum spdlog::logger::flush_level() const
+{
+    return static_cast<spdlog::level::level_enum>(flush_level_.load(std::memory_order_relaxed));
+}
+
 inline bool spdlog::logger::should_flush_(const details::log_msg &msg)
 {
     auto flush_level = flush_level_.load(std::memory_order_relaxed);
@@ -343,3 +372,12 @@ inline std::vector<spdlog::sink_ptr> &spdlog::logger::sinks()
 {
     return sinks_;
 }
+
+inline std::shared_ptr<spdlog::logger> spdlog::logger::clone(std::string logger_name)
+{
+    auto cloned = std::make_shared<spdlog::logger>(std::move(logger_name), sinks_.begin(), sinks_.end());
+    cloned->set_level(this->level());
+    cloned->flush_on(this->flush_level());
+    cloned->set_error_handler(this->error_handler());
+    return cloned;
+}

include/spdlog/details/mpmc_blocking_q.h

@@ -105,6 +105,12 @@ public:
 
 #endif
 
+    size_t overrun_counter()
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        return q_.overrun_counter();
+    }
+
 private:
     std::mutex queue_mutex_;
     std::condition_variable push_cv_;

include/spdlog/details/os.h

@@ -159,9 +159,9 @@ inline bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mod
 {
 #ifdef _WIN32
 #ifdef SPDLOG_WCHAR_FILENAMES
-    *fp = _wfsopen((filename.c_str()), mode.c_str(), _SH_DENYWR);
+    *fp = _wfsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
 #else
-    *fp = _fsopen((filename.c_str()), mode.c_str(), _SH_DENYWR);
+    *fp = _fsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
 #endif
 #else // unix
     *fp = fopen((filename.c_str()), mode.c_str());

include/spdlog/details/pattern_formatter.h

@@ -69,7 +69,7 @@ static const char *ampm(const tm &t)
     return t.tm_hour >= 12 ? "PM" : "AM";
 }
 
-static unsigned int to12h(const tm &t)
+static int to12h(const tm &t)
 {
     return t.tm_hour > 12 ? t.tm_hour - 12 : t.tm_hour;
 }
@@ -116,7 +116,7 @@ class B_formatter : public flag_formatter
 };
 
 // Date and time representation (Thu Aug 23 15:35:46 2014)
-class c_formatter SPDLOG_FINAL : public flag_formatter
+class c_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -142,7 +142,7 @@ class c_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // year - 2 digit
-class C_formatter SPDLOG_FINAL : public flag_formatter
+class C_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -151,7 +151,7 @@ class C_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // Short MM/DD/YY date, equivalent to %m/%d/%y 08/23/01
-class D_formatter SPDLOG_FINAL : public flag_formatter
+class D_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -164,7 +164,7 @@ class D_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // year - 4 digit
-class Y_formatter SPDLOG_FINAL : public flag_formatter
+class Y_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -173,7 +173,7 @@ class Y_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // month 1-12
-class m_formatter SPDLOG_FINAL : public flag_formatter
+class m_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -182,7 +182,7 @@ class m_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // day of month 1-31
-class d_formatter SPDLOG_FINAL : public flag_formatter
+class d_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -191,7 +191,7 @@ class d_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // hours in 24 format 0-23
-class H_formatter SPDLOG_FINAL : public flag_formatter
+class H_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -200,7 +200,7 @@ class H_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // hours in 12 format 1-12
-class I_formatter SPDLOG_FINAL : public flag_formatter
+class I_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -209,7 +209,7 @@ class I_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // minutes 0-59
-class M_formatter SPDLOG_FINAL : public flag_formatter
+class M_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -218,7 +218,7 @@ class M_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // seconds 0-59
-class S_formatter SPDLOG_FINAL : public flag_formatter
+class S_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -227,7 +227,7 @@ class S_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // milliseconds
-class e_formatter SPDLOG_FINAL : public flag_formatter
+class e_formatter final : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
@@ -237,17 +237,17 @@ class e_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // microseconds
-class f_formatter SPDLOG_FINAL : public flag_formatter
+class f_formatter final : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
         auto micros = fmt_helper::time_fraction<std::chrono::microseconds>(msg.time);
-        fmt_helper::pad6(static_cast<int>(micros.count()), dest);
+        fmt_helper::pad6(static_cast<size_t>(micros.count()), dest);
     }
 };
 
 // nanoseconds
-class F_formatter SPDLOG_FINAL : public flag_formatter
+class F_formatter final : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
@@ -257,7 +257,7 @@ class F_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // seconds since epoch
-class E_formatter SPDLOG_FINAL : public flag_formatter
+class E_formatter final : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
@@ -268,7 +268,7 @@ class E_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // AM/PM
-class p_formatter SPDLOG_FINAL : public flag_formatter
+class p_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -277,7 +277,7 @@ class p_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // 12 hour clock 02:55:02 pm
-class r_formatter SPDLOG_FINAL : public flag_formatter
+class r_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -292,7 +292,7 @@ class r_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // 24-hour HH:MM time, equivalent to %H:%M
-class R_formatter SPDLOG_FINAL : public flag_formatter
+class R_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -303,7 +303,7 @@ class R_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // ISO 8601 time format (HH:MM:SS), equivalent to %H:%M:%S
-class T_formatter SPDLOG_FINAL : public flag_formatter
+class T_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
@@ -318,7 +318,7 @@ class T_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // ISO 8601 offset from UTC in timezone (+-HH:MM)
-class z_formatter SPDLOG_FINAL : public flag_formatter
+class z_formatter final : public flag_formatter
 {
 public:
     const std::chrono::seconds cache_refresh = std::chrono::seconds(5);
@@ -371,7 +371,7 @@ private:
 };
 
 // Thread id
-class t_formatter SPDLOG_FINAL : public flag_formatter
+class t_formatter final : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
@@ -380,7 +380,7 @@ class t_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // Current pid
-class pid_formatter SPDLOG_FINAL : public flag_formatter
+class pid_formatter final : public flag_formatter
 {
     void format(const details::log_msg &, const std::tm &, fmt::memory_buffer &dest) override
     {
@@ -389,7 +389,7 @@ class pid_formatter SPDLOG_FINAL : public flag_formatter
 };
 
 // message counter formatter
-class i_formatter SPDLOG_FINAL : public flag_formatter
+class i_formatter final : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
@@ -397,7 +397,7 @@ class i_formatter SPDLOG_FINAL : public flag_formatter
     }
 };
 
-class v_formatter SPDLOG_FINAL : public flag_formatter
+class v_formatter final : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
@@ -405,7 +405,7 @@ class v_formatter SPDLOG_FINAL : public flag_formatter
     }
 };
 
-class ch_formatter SPDLOG_FINAL : public flag_formatter
+class ch_formatter final : public flag_formatter
 {
 public:
     explicit ch_formatter(char ch)
@@ -422,7 +422,7 @@ private:
 };
 
 // aggregate user chars to display as is
-class aggregate_formatter SPDLOG_FINAL : public flag_formatter
+class aggregate_formatter final : public flag_formatter
 {
 public:
     aggregate_formatter() = default;
@@ -441,14 +441,14 @@ private:
 };
 
 // mark the color range. expect it to be in the form of "%^colored text%$"
-class color_start_formatter SPDLOG_FINAL : public flag_formatter
+class color_start_formatter final : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
         msg.color_range_start = dest.size();
     }
 };
-class color_stop_formatter SPDLOG_FINAL : public flag_formatter
+class color_stop_formatter final : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
@@ -458,11 +458,14 @@ class color_stop_formatter SPDLOG_FINAL : public flag_formatter
 
 // Full info formatter
 // pattern: [%Y-%m-%d %H:%M:%S.%e] [%n] [%l] %v
-class full_formatter SPDLOG_FINAL : public flag_formatter
+class full_formatter final : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &tm_time, fmt::memory_buffer &dest) override
     {
-        using namespace std::chrono;
+        using std::chrono::duration_cast;
+        using std::chrono::milliseconds;
+        using std::chrono::seconds;
+
 #ifndef SPDLOG_NO_DATETIME
 
         // cache the date/time part for the next second.
@@ -471,7 +474,7 @@ class full_formatter SPDLOG_FINAL : public flag_formatter
 
         if (cache_timestamp_ != secs || cached_datetime_.size() == 0)
         {
-            cached_datetime_.resize(0);
+            cached_datetime_.clear();
             cached_datetime_.push_back('[');
             fmt_helper::append_int(tm_time.tm_year + 1900, cached_datetime_);
             cached_datetime_.push_back('-');
@@ -528,7 +531,7 @@ private:
 
 } // namespace details
 
-class pattern_formatter SPDLOG_FINAL : public formatter
+class pattern_formatter final : public formatter
 {
 public:
     explicit pattern_formatter(
@@ -545,9 +548,9 @@ public:
     pattern_formatter(const pattern_formatter &other) = delete;
     pattern_formatter &operator=(const pattern_formatter &other) = delete;
 
-    virtual std::unique_ptr<formatter> clone() const override
+    std::unique_ptr<formatter> clone() const override
     {
-        return std::unique_ptr<formatter>(new pattern_formatter(pattern_, pattern_time_type_, eol_));
+        return details::make_unique<pattern_formatter>(pattern_, pattern_time_type_, eol_);
     }
 
     void format(const details::log_msg &msg, fmt::memory_buffer &dest) override
@@ -592,141 +595,141 @@ private:
         {
         // logger name
         case 'n':
-            formatters_.emplace_back(new details::name_formatter());
+            formatters_.push_back(details::make_unique<details::name_formatter>());
             break;
 
         case 'l':
-            formatters_.emplace_back(new details::level_formatter());
+            formatters_.push_back(details::make_unique<details::level_formatter>());
             break;
 
         case 'L':
-            formatters_.emplace_back(new details::short_level_formatter());
+            formatters_.push_back(details::make_unique<details::short_level_formatter>());
             break;
 
         case ('t'):
-            formatters_.emplace_back(new details::t_formatter());
+            formatters_.push_back(details::make_unique<details::t_formatter>());
             break;
 
         case ('v'):
-            formatters_.emplace_back(new details::v_formatter());
+            formatters_.push_back(details::make_unique<details::v_formatter>());
             break;
 
         case ('a'):
-            formatters_.emplace_back(new details::a_formatter());
+            formatters_.push_back(details::make_unique<details::a_formatter>());
             break;
 
         case ('A'):
-            formatters_.emplace_back(new details::A_formatter());
+            formatters_.push_back(details::make_unique<details::A_formatter>());
             break;
 
         case ('b'):
         case ('h'):
-            formatters_.emplace_back(new details::b_formatter());
+            formatters_.push_back(details::make_unique<details::b_formatter>());
             break;
 
         case ('B'):
-            formatters_.emplace_back(new details::B_formatter());
+            formatters_.push_back(details::make_unique<details::B_formatter>());
             break;
         case ('c'):
-            formatters_.emplace_back(new details::c_formatter());
+            formatters_.push_back(details::make_unique<details::c_formatter>());
             break;
 
         case ('C'):
-            formatters_.emplace_back(new details::C_formatter());
+            formatters_.push_back(details::make_unique<details::C_formatter>());
             break;
 
         case ('Y'):
-            formatters_.emplace_back(new details::Y_formatter());
+            formatters_.push_back(details::make_unique<details::Y_formatter>());
             break;
 
         case ('D'):
         case ('x'):
-            formatters_.emplace_back(new details::D_formatter());
+            formatters_.push_back(details::make_unique<details::D_formatter>());
             break;
 
         case ('m'):
-            formatters_.emplace_back(new details::m_formatter());
+            formatters_.push_back(details::make_unique<details::m_formatter>());
             break;
 
         case ('d'):
-            formatters_.emplace_back(new details::d_formatter());
+            formatters_.push_back(details::make_unique<details::d_formatter>());
             break;
 
         case ('H'):
-            formatters_.emplace_back(new details::H_formatter());
+            formatters_.push_back(details::make_unique<details::H_formatter>());
             break;
 
         case ('I'):
-            formatters_.emplace_back(new details::I_formatter());
+            formatters_.push_back(details::make_unique<details::I_formatter>());
             break;
 
         case ('M'):
-            formatters_.emplace_back(new details::M_formatter());
+            formatters_.push_back(details::make_unique<details::M_formatter>());
             break;
 
         case ('S'):
-            formatters_.emplace_back(new details::S_formatter());
+            formatters_.push_back(details::make_unique<details::S_formatter>());
             break;
 
         case ('e'):
-            formatters_.emplace_back(new details::e_formatter());
+            formatters_.push_back(details::make_unique<details::e_formatter>());
             break;
 
         case ('f'):
-            formatters_.emplace_back(new details::f_formatter());
+            formatters_.push_back(details::make_unique<details::f_formatter>());
             break;
         case ('F'):
-            formatters_.emplace_back(new details::F_formatter());
+            formatters_.push_back(details::make_unique<details::F_formatter>());
             break;
 
         case ('E'):
-            formatters_.emplace_back(new details::E_formatter());
+            formatters_.push_back(details::make_unique<details::E_formatter>());
             break;
 
         case ('p'):
-            formatters_.emplace_back(new details::p_formatter());
+            formatters_.push_back(details::make_unique<details::p_formatter>());
             break;
 
         case ('r'):
-            formatters_.emplace_back(new details::r_formatter());
+            formatters_.push_back(details::make_unique<details::r_formatter>());
             break;
 
         case ('R'):
-            formatters_.emplace_back(new details::R_formatter());
+            formatters_.push_back(details::make_unique<details::R_formatter>());
             break;
 
         case ('T'):
         case ('X'):
-            formatters_.emplace_back(new details::T_formatter());
+            formatters_.push_back(details::make_unique<details::T_formatter>());
             break;
 
         case ('z'):
-            formatters_.emplace_back(new details::z_formatter());
+            formatters_.push_back(details::make_unique<details::z_formatter>());
             break;
 
         case ('+'):
-            formatters_.emplace_back(new details::full_formatter());
+            formatters_.push_back(details::make_unique<details::full_formatter>());
             break;
 
         case ('P'):
-            formatters_.emplace_back(new details::pid_formatter());
+            formatters_.push_back(details::make_unique<details::pid_formatter>());
             break;
-
+#ifdef SPDLOG_ENABLE_MESSAGE_COUNTER
         case ('i'):
-            formatters_.emplace_back(new details::i_formatter());
+            formatters_.push_back(details::make_unique<details::i_formatter>());
             break;
-
+#endif
         case ('^'):
-            formatters_.emplace_back(new details::color_start_formatter());
+            formatters_.push_back(details::make_unique<details::color_start_formatter>());
             break;
 
         case ('$'):
-            formatters_.emplace_back(new details::color_stop_formatter());
+            formatters_.push_back(details::make_unique<details::color_stop_formatter>());
             break;
 
         default: // Unknown flag appears as is
-            formatters_.emplace_back(new details::ch_formatter('%'));
-            formatters_.emplace_back(new details::ch_formatter(flag));
+            formatters_.push_back(details::make_unique<details::ch_formatter>('%'));
+            formatters_.push_back(details::make_unique<details::ch_formatter>(flag));
             break;
         }
     }
@@ -744,7 +747,6 @@ private:
                 {
                     formatters_.push_back(std::move(user_chars));
                 }
-                // if(
                 if (++it != end)
                 {
                     handle_flag_(*it);
@@ -758,7 +760,7 @@ private:
             {
                 if (!user_chars)
                 {
-                    user_chars = std::unique_ptr<details::aggregate_formatter>(new details::aggregate_formatter());
+                    user_chars = details::make_unique<details::aggregate_formatter>();
                 }
                 user_chars->add_ch(*it);
             }

include/spdlog/details/periodic_worker.h

@@ -23,7 +23,7 @@ namespace details {
 class periodic_worker
 {
 public:
-    periodic_worker(std::function<void()> callback_fun, std::chrono::seconds interval)
+    periodic_worker(const std::function<void()> &callback_fun, std::chrono::seconds interval)
     {
         active_ = (interval > std::chrono::seconds::zero());
         if (!active_)

include/spdlog/details/registry.h

@@ -35,7 +35,7 @@ public:
         std::lock_guard<std::mutex> lock(logger_map_mutex_);
         auto logger_name = new_logger->name();
         throw_if_exists_(logger_name);
-        loggers_[logger_name] = new_logger;
+        loggers_[logger_name] = std::move(new_logger);
     }
 
     void register_and_init(std::shared_ptr<logger> new_logger)
@@ -56,7 +56,7 @@ public:
         new_logger->flush_on(flush_level_);
 
         // add to registry
-        loggers_[logger_name] = new_logger;
+        loggers_[logger_name] = std::move(new_logger);
     }
 
     std::shared_ptr<logger> get(const std::string &logger_name)
@@ -112,8 +112,8 @@ public:
     void flush_every(std::chrono::seconds interval)
     {
         std::lock_guard<std::mutex> lock(flusher_mutex_);
-        std::function<void()> clbk(std::bind(&registry::flush_all, this));
-        periodic_flusher_.reset(new periodic_worker(clbk, interval));
+        std::function<void()> clbk = std::bind(&registry::flush_all, this);
+        periodic_flusher_ = details::make_unique<periodic_worker>(clbk, interval);
     }
 
     void set_error_handler(log_err_handler handler)
@@ -126,7 +126,7 @@ public:
         err_handler_ = handler;
     }
 
-    void apply_all(std::function<void(std::shared_ptr<logger>)> fun)
+    void apply_all(const std::function<void(const std::shared_ptr<logger>)> &fun)
     {
         std::lock_guard<std::mutex> lock(logger_map_mutex_);
         for (auto &l : loggers_)
@@ -189,11 +189,7 @@ private:
     {
     }
 
-    ~registry()
-    {
-        /*std::lock_guard<std::mutex> lock(flusher_mutex_);
-        periodic_flusher_.reset();*/
-    }
+    ~registry() = default;
 
     void throw_if_exists_(const std::string &logger_name)
     {

include/spdlog/details/thread_pool.h

@@ -64,8 +64,8 @@ struct async_msg
         return *this;
     }
 #else // (_MSC_VER) && _MSC_VER <= 1800
-    async_msg(async_msg &&other) = default;
-    async_msg &operator=(async_msg &&other) = default;
+    async_msg(async_msg &&) = default;
+    async_msg &operator=(async_msg &&) = default;
 #endif
 
     // construct from log_msg with given type
@@ -75,13 +75,13 @@ struct async_msg
         , time(m.time)
         , thread_id(m.thread_id)
         , msg_id(m.msg_id)
-        , worker_ptr(std::forward<async_logger_ptr>(worker))
+        , worker_ptr(std::move(worker))
     {
         fmt_helper::append_buf(m.raw, raw);
     }
 
     async_msg(async_logger_ptr &&worker, async_msg_type the_type)
-        : async_msg(std::forward<async_logger_ptr>(worker), the_type, details::log_msg())
+        : async_msg(std::move(worker), the_type, details::log_msg())
     {
     }
 
@@ -122,7 +122,7 @@ public:
         }
         for (size_t i = 0; i < threads_n; i++)
         {
-            threads_.emplace_back(std::bind(&thread_pool::worker_loop_, this));
+            threads_.emplace_back(&thread_pool::worker_loop_, this);
         }
     }
 
@@ -146,9 +146,12 @@ public:
         }
     }
 
+    thread_pool(const thread_pool &) = delete;
+    thread_pool &operator=(thread_pool &&) = delete;
+
     void post_log(async_logger_ptr &&worker_ptr, details::log_msg &&msg, async_overflow_policy overflow_policy)
     {
-        async_msg async_m(std::forward<async_logger_ptr>(worker_ptr), async_msg_type::log, std::forward<log_msg>(msg));
+        async_msg async_m(std::move(worker_ptr), async_msg_type::log, std::move(msg));
         post_async_msg_(std::move(async_m), overflow_policy);
     }
 
@@ -157,6 +160,11 @@ public:
         post_async_msg_(async_msg(std::move(worker_ptr), async_msg_type::flush), overflow_policy);
     }
 
+    size_t overrun_counter()
+    {
+        return q_.overrun_counter();
+    }
+
 private:
     q_type q_;
 
@@ -193,6 +201,13 @@ private:
 
         switch (incoming_async_msg.msg_type)
         {
+        case async_msg_type::log:
+        {
+            log_msg msg;
+            incoming_async_msg.to_log_msg(msg);
+            incoming_async_msg.worker_ptr->backend_log_(msg);
+            return true;
+        }
         case async_msg_type::flush:
         {
             incoming_async_msg.worker_ptr->backend_flush_();
@@ -203,16 +218,9 @@ private:
         {
             return false;
         }
-
-        default:
-        {
-            log_msg msg;
-            incoming_async_msg.to_log_msg(msg);
-            incoming_async_msg.worker_ptr->backend_log_(msg);
-            return true;
         }
-        }
-        return true; // should not be reached
+        assert(false && "Unexpected async_msg_type");
+        return true;
     }
 };
 

include/spdlog/fmt/bin_to_hex.h

@@ -0,0 +1,172 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+//
+// Support for logging binary data as hex
+// format flags:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+
+//
+// Examples:
+//
+// std::vector<char> v(200, 0x0b);
+// logger->info("Some buffer {}", spdlog::to_hex(v));
+// char buf[128];
+// logger->info("Some buffer {:X}", spdlog::to_hex(std::begin(buf), std::end(buf)));
+
+namespace spdlog {
+namespace details {
+
+template<typename It>
+class bytes_range
+{
+public:
+    bytes_range(It range_begin, It range_end)
+        : begin_(range_begin)
+        , end_(range_end)
+    {
+    }
+
+    It begin() const
+    {
+        return begin_;
+    }
+    It end() const
+    {
+        return end_;
+    }
+
+private:
+    It begin_, end_;
+};
+} // namespace details
+
+// create a bytes_range that wraps the given container
+template<typename Container>
+inline details::bytes_range<typename Container::const_iterator> to_hex(const Container &container)
+{
+    static_assert(sizeof(typename Container::value_type) == 1, "sizeof(Container::value_type) != 1");
+    using Iter = typename Container::const_iterator;
+    return details::bytes_range<Iter>(std::begin(container), std::end(container));
+}
+
+// create bytes_range from ranges
+template<typename It>
+inline details::bytes_range<It> to_hex(const It range_begin, const It range_end)
+{
+    return details::bytes_range<It>(range_begin, range_end);
+}
+
+} // namespace spdlog
+
+namespace fmt {
+
+template<typename T>
+struct formatter<spdlog::details::bytes_range<T>>
+{
+    const std::size_t line_size = 100;
+    const char delimiter = ' ';
+
+    bool put_newlines = true;
+    bool put_delimiters = true;
+    bool use_uppercase = false;
+    bool put_positions = true; // position on start of each line
+
+    // parse the format string flags
+    template<typename ParseContext>
+    auto parse(ParseContext &ctx) -> decltype(ctx.begin())
+    {
+        auto it = ctx.begin();
+        while (*it && *it != '}')
+        {
+            switch (*it)
+            {
+            case 'X':
+                use_uppercase = true;
+                break;
+            case 's':
+                put_delimiters = false;
+                break;
+            case 'p':
+                put_positions = false;
+                break;
+            case 'n':
+                put_newlines = false;
+                break;
+            }
+
+            ++it;
+        }
+        return it;
+    }
+
+    // format the given bytes range as hex
+    template<typename FormatContext, typename Container>
+    auto format(const spdlog::details::bytes_range<Container> &the_range, FormatContext &ctx) -> decltype(ctx.out())
+    {
+        constexpr const char *hex_upper = "0123456789ABCDEF";
+        constexpr const char *hex_lower = "0123456789abcdef";
+        const char *hex_chars = use_uppercase ? hex_upper : hex_lower;
+
+        std::size_t pos = 0;
+        std::size_t column = line_size;
+        auto inserter = ctx.begin();
+
+        for (auto &item : the_range)
+        {
+            auto ch = static_cast<unsigned char>(item);
+            pos++;
+
+            if (put_newlines && column >= line_size)
+            {
+                column = put_newline(inserter, pos);
+
+                // put first byte without delimiter in front of it
+                *inserter++ = hex_chars[(ch >> 4) & 0x0f];
+                *inserter++ = hex_chars[ch & 0x0f];
+                column += 2;
+                continue;
+            }
+
+            if (put_delimiters)
+            {
+                *inserter++ = delimiter;
+                ++column;
+            }
+
+            *inserter++ = hex_chars[(ch >> 4) & 0x0f];
+            *inserter++ = hex_chars[ch & 0x0f];
+            column += 2;
+        }
+        return inserter;
+    }
+
+    // put newline(and position header)
+    // return the next column
+    template<typename It>
+    std::size_t put_newline(It inserter, std::size_t pos)
+    {
+#ifdef _WIN32
+        *inserter++ = '\r';
+#endif
+        *inserter++ = '\n';
+
+        if (put_positions)
+        {
+            fmt::format_to(inserter, "{:<04X}: ", pos - 1);
+            return 7;
+        }
+        else
+        {
+            return 1;
+        }
+    }
+};
+} // namespace fmt

include/spdlog/fmt/bundled/locale.h

@@ -1,27 +0,0 @@
-// Formatting library for C++ - locale support
-//
-// Copyright (c) 2012 - 2016, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "format.h"
-#include <locale>
-
-namespace fmt {
-class locale
-{
-private:
-    std::locale locale_;
-
-public:
-    explicit locale(std::locale loc = std::locale())
-        : locale_(loc)
-    {
-    }
-    std::locale get()
-    {
-        return locale_;
-    }
-};
-} // namespace fmt

include/spdlog/fmt/bundled/ostream.h

@@ -14,139 +14,123 @@
 FMT_BEGIN_NAMESPACE
 namespace internal {
 
-template<class Char>
-class formatbuf : public std::basic_streambuf<Char>
-{
-private:
-    typedef typename std::basic_streambuf<Char>::int_type int_type;
-    typedef typename std::basic_streambuf<Char>::traits_type traits_type;
+template <class Char>
+class formatbuf : public std::basic_streambuf<Char> {
+ private:
+  typedef typename std::basic_streambuf<Char>::int_type int_type;
+  typedef typename std::basic_streambuf<Char>::traits_type traits_type;
 
-    basic_buffer<Char> &buffer_;
+  basic_buffer<Char> &buffer_;
 
-public:
-    formatbuf(basic_buffer<Char> &buffer)
-        : buffer_(buffer)
-    {
-    }
+ public:
+  formatbuf(basic_buffer<Char> &buffer) : buffer_(buffer) {}
 
-protected:
-    // The put-area is actually always empty. This makes the implementation
-    // simpler and has the advantage that the streambuf and the buffer are always
-    // in sync and sputc never writes into uninitialized memory. The obvious
-    // disadvantage is that each call to sputc always results in a (virtual) call
-    // to overflow. There is no disadvantage here for sputn since this always
-    // results in a call to xsputn.
+ protected:
+  // The put-area is actually always empty. This makes the implementation
+  // simpler and has the advantage that the streambuf and the buffer are always
+  // in sync and sputc never writes into uninitialized memory. The obvious
+  // disadvantage is that each call to sputc always results in a (virtual) call
+  // to overflow. There is no disadvantage here for sputn since this always
+  // results in a call to xsputn.
 
-    int_type overflow(int_type ch = traits_type::eof()) FMT_OVERRIDE
-    {
-        if (!traits_type::eq_int_type(ch, traits_type::eof()))
-            buffer_.push_back(static_cast<Char>(ch));
-        return ch;
-    }
+  int_type overflow(int_type ch = traits_type::eof()) FMT_OVERRIDE {
+    if (!traits_type::eq_int_type(ch, traits_type::eof()))
+      buffer_.push_back(static_cast<Char>(ch));
+    return ch;
+  }
 
-    std::streamsize xsputn(const Char *s, std::streamsize count) FMT_OVERRIDE
-    {
-        buffer_.append(s, s + count);
-        return count;
-    }
+  std::streamsize xsputn(const Char *s, std::streamsize count) FMT_OVERRIDE {
+    buffer_.append(s, s + count);
+    return count;
+  }
 };
 
-template<typename Char>
-struct test_stream : std::basic_ostream<Char>
-{
-private:
-    struct null;
-    // Hide all operator<< from std::basic_ostream<Char>.
-    void operator<<(null);
+template <typename Char>
+struct test_stream : std::basic_ostream<Char> {
+ private:
+  struct null;
+  // Hide all operator<< from std::basic_ostream<Char>.
+  void operator<<(null);
 };
 
-// Checks if T has a user-defined operator<< (e.g. not a member of
-// std::ostream).
-template<typename T, typename Char>
-class is_streamable
-{
-private:
-    template<typename U>
-    static decltype(internal::declval<test_stream<Char> &>() << internal::declval<U>(), std::true_type()) test(int);
+// Checks if T has a user-defined operator<< (e.g. not a member of std::ostream).
+template <typename T, typename Char>
+class is_streamable {
+ private:
+  template <typename U>
+  static decltype(
+    internal::declval<test_stream<Char>&>()
+      << internal::declval<U>(), std::true_type()) test(int);
 
-    template<typename>
-    static std::false_type test(...);
+  template <typename>
+  static std::false_type test(...);
 
-    typedef decltype(test<T>(0)) result;
+  typedef decltype(test<T>(0)) result;
 
-public:
-    // std::string operator<< is not considered user-defined because we handle
-    // strings
-    // specially.
-    static const bool value = result::value && !std::is_same<T, std::string>::value;
-};
-
-// Disable conversion to int if T has an overloaded operator<< which is a free
-// function (not a member of std::ostream).
-template<typename T, typename Char>
-class convert_to_int<T, Char, true>
-{
-public:
-    static const bool value = convert_to_int<T, Char, false>::value && !is_streamable<T, Char>::value;
+ public:
+  static const bool value = result::value;
 };
 
 // Write the content of buf to os.
-template<typename Char>
-void write(std::basic_ostream<Char> &os, basic_buffer<Char> &buf)
-{
-    const Char *data = buf.data();
-    typedef std::make_unsigned<std::streamsize>::type UnsignedStreamSize;
-    UnsignedStreamSize size = buf.size();
-    UnsignedStreamSize max_size = internal::to_unsigned((std::numeric_limits<std::streamsize>::max)());
-    do
-    {
-        UnsignedStreamSize n = size <= max_size ? size : max_size;
-        os.write(data, static_cast<std::streamsize>(n));
-        data += n;
-        size -= n;
-    } while (size != 0);
+template <typename Char>
+void write(std::basic_ostream<Char> &os, basic_buffer<Char> &buf) {
+  const Char *data = buf.data();
+  typedef std::make_unsigned<std::streamsize>::type UnsignedStreamSize;
+  UnsignedStreamSize size = buf.size();
+  UnsignedStreamSize max_size =
+      internal::to_unsigned((std::numeric_limits<std::streamsize>::max)());
+  do {
+    UnsignedStreamSize n = size <= max_size ? size : max_size;
+    os.write(data, static_cast<std::streamsize>(n));
+    data += n;
+    size -= n;
+  } while (size != 0);
 }
 
-template<typename Char, typename T>
-void format_value(basic_buffer<Char> &buffer, const T &value)
-{
-    internal::formatbuf<Char> format_buf(buffer);
-    std::basic_ostream<Char> output(&format_buf);
-    output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
-    output << value;
-    buffer.resize(buffer.size());
+template <typename Char, typename T>
+void format_value(basic_buffer<Char> &buffer, const T &value) {
+  internal::formatbuf<Char> format_buf(buffer);
+  std::basic_ostream<Char> output(&format_buf);
+  output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
+  output << value;
+  buffer.resize(buffer.size());
 }
+}  // namespace internal
 
-// Disable builtin formatting of enums and use operator<< instead.
-template<typename T>
-struct format_enum<T, typename std::enable_if<std::is_enum<T>::value>::type> : std::false_type
-{
+// Disable conversion to int if T has an overloaded operator<< which is a free
+// function (not a member of std::ostream).
+template <typename T, typename Char>
+struct convert_to_int<T, Char, void> {
+  static const bool value =
+    convert_to_int<T, Char, int>::value &&
+    !internal::is_streamable<T, Char>::value;
 };
-} // namespace internal
 
 // Formats an object of type T that has an overloaded ostream operator<<.
-template<typename T, typename Char>
-struct formatter<T, Char, typename std::enable_if<internal::is_streamable<T, Char>::value>::type> : formatter<basic_string_view<Char>, Char>
-{
+template <typename T, typename Char>
+struct formatter<T, Char,
+    typename std::enable_if<
+      internal::is_streamable<T, Char>::value &&
+      !internal::format_type<
+        typename buffer_context<Char>::type, T>::value>::type>
+    : formatter<basic_string_view<Char>, Char> {
 
-    template<typename Context>
-    auto format(const T &value, Context &ctx) -> decltype(ctx.out())
-    {
-        basic_memory_buffer<Char> buffer;
-        internal::format_value(buffer, value);
-        basic_string_view<Char> str(buffer.data(), buffer.size());
-        formatter<basic_string_view<Char>, Char>::format(str, ctx);
-        return ctx.out();
-    }
+  template <typename Context>
+  auto format(const T &value, Context &ctx) -> decltype(ctx.out()) {
+    basic_memory_buffer<Char> buffer;
+    internal::format_value(buffer, value);
+    basic_string_view<Char> str(buffer.data(), buffer.size());
+    return formatter<basic_string_view<Char>, Char>::format(str, ctx);
+  }
 };
 
-template<typename Char>
-inline void vprint(
-    std::basic_ostream<Char> &os, basic_string_view<Char> format_str, basic_format_args<typename buffer_context<Char>::type> args)
-{
-    basic_memory_buffer<Char> buffer;
-    vformat_to(buffer, format_str, args);
-    internal::write(os, buffer);
+template <typename Char>
+inline void vprint(std::basic_ostream<Char> &os,
+                   basic_string_view<Char> format_str,
+                   basic_format_args<typename buffer_context<Char>::type> args) {
+  basic_memory_buffer<Char> buffer;
+  vformat_to(buffer, format_str, args);
+  internal::write(os, buffer);
 }
 /**
   \rst
@@ -157,17 +141,17 @@ inline void vprint(
     fmt::print(cerr, "Don't {}!", "panic");
   \endrst
  */
-template<typename... Args>
-inline void print(std::ostream &os, string_view format_str, const Args &... args)
-{
-    vprint<char>(os, format_str, make_format_args<format_context>(args...));
+template <typename... Args>
+inline void print(std::ostream &os, string_view format_str,
+                  const Args & ... args) {
+  vprint<char>(os, format_str, make_format_args<format_context>(args...));
 }
 
-template<typename... Args>
-inline void print(std::wostream &os, wstring_view format_str, const Args &... args)
-{
-    vprint<wchar_t>(os, format_str, make_format_args<wformat_context>(args...));
+template <typename... Args>
+inline void print(std::wostream &os, wstring_view format_str,
+                  const Args & ... args) {
+  vprint<wchar_t>(os, format_str, make_format_args<wformat_context>(args...));
 }
 FMT_END_NAMESPACE
 
-#endif // FMT_OSTREAM_H_
+#endif  // FMT_OSTREAM_H_

include/spdlog/fmt/bundled/posix.h

@@ -10,55 +10,54 @@
 
 #if defined(__MINGW32__) || defined(__CYGWIN__)
 // Workaround MinGW bug https://sourceforge.net/p/mingw/bugs/2024/.
-#undef __STRICT_ANSI__
+# undef __STRICT_ANSI__
 #endif
 
 #include <errno.h>
-#include <fcntl.h>  // for O_RDONLY
-#include <locale.h> // for locale_t
+#include <fcntl.h>   // for O_RDONLY
+#include <locale.h>  // for locale_t
 #include <stdio.h>
-#include <stdlib.h> // for strtod_l
+#include <stdlib.h>  // for strtod_l
 
 #include <cstddef>
 
 #if defined __APPLE__ || defined(__FreeBSD__)
-#include <xlocale.h> // for LC_NUMERIC_MASK on OS X
+# include <xlocale.h>  // for LC_NUMERIC_MASK on OS X
 #endif
 
 #include "format.h"
 
 #ifndef FMT_POSIX
-#if defined(_WIN32) && !defined(__MINGW32__)
+# if defined(_WIN32) && !defined(__MINGW32__)
 // Fix warnings about deprecated symbols.
-#define FMT_POSIX(call) _##call
-#else
-#define FMT_POSIX(call) call
-#endif
+#  define FMT_POSIX(call) _##call
+# else
+#  define FMT_POSIX(call) call
+# endif
 #endif
 
 // Calls to system functions are wrapped in FMT_SYSTEM for testability.
 #ifdef FMT_SYSTEM
-#define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
+# define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
 #else
-#define FMT_SYSTEM(call) call
-#ifdef _WIN32
+# define FMT_SYSTEM(call) call
+# ifdef _WIN32
 // Fix warnings about deprecated symbols.
-#define FMT_POSIX_CALL(call) ::_##call
-#else
-#define FMT_POSIX_CALL(call) ::call
-#endif
+#  define FMT_POSIX_CALL(call) ::_##call
+# else
+#  define FMT_POSIX_CALL(call) ::call
+# endif
 #endif
 
 // Retries the expression while it evaluates to error_result and errno
 // equals to EINTR.
 #ifndef _WIN32
-#define FMT_RETRY_VAL(result, expression, error_result)                                                                                    \
-    do                                                                                                                                     \
-    {                                                                                                                                      \
-        result = (expression);                                                                                                             \
-    } while (result == error_result && errno == EINTR)
+# define FMT_RETRY_VAL(result, expression, error_result) \
+  do { \
+    result = (expression); \
+  } while (result == error_result && errno == EINTR)
 #else
-#define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
+# define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
 #endif
 
 #define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
@@ -90,167 +89,94 @@ FMT_BEGIN_NAMESPACE
     format(std::string("{}"), 42);
   \endrst
  */
-template<typename Char>
-class basic_cstring_view
-{
-private:
-    const Char *data_;
+template <typename Char>
+class basic_cstring_view {
+ private:
+  const Char *data_;
 
-public:
-    /** Constructs a string reference object from a C string. */
-    basic_cstring_view(const Char *s)
-        : data_(s)
-    {
-    }
+ public:
+  /** Constructs a string reference object from a C string. */
+  basic_cstring_view(const Char *s) : data_(s) {}
 
-    /**
-      \rst
-      Constructs a string reference from an ``std::string`` object.
-      \endrst
-     */
-    basic_cstring_view(const std::basic_string<Char> &s)
-        : data_(s.c_str())
-    {
-    }
+  /**
+    \rst
+    Constructs a string reference from an ``std::string`` object.
+    \endrst
+   */
+  basic_cstring_view(const std::basic_string<Char> &s) : data_(s.c_str()) {}
 
-    /** Returns the pointer to a C string. */
-    const Char *c_str() const
-    {
-        return data_;
-    }
+  /** Returns the pointer to a C string. */
+  const Char *c_str() const { return data_; }
 };
 
 typedef basic_cstring_view<char> cstring_view;
 typedef basic_cstring_view<wchar_t> wcstring_view;
 
 // An error code.
-class error_code
-{
-private:
-    int value_;
+class error_code {
+ private:
+  int value_;
 
-public:
-    explicit error_code(int value = 0) FMT_NOEXCEPT : value_(value) {}
+ public:
+  explicit error_code(int value = 0) FMT_NOEXCEPT : value_(value) {}
 
-    int get() const FMT_NOEXCEPT
-    {
-        return value_;
-    }
+  int get() const FMT_NOEXCEPT { return value_; }
 };
 
 // A buffered file.
-class buffered_file
-{
-private:
-    FILE *file_;
+class buffered_file {
+ private:
+  FILE *file_;
 
-    friend class file;
+  friend class file;
 
-    explicit buffered_file(FILE *f)
-        : file_(f)
-    {
-    }
+  explicit buffered_file(FILE *f) : file_(f) {}
 
-public:
-    // Constructs a buffered_file object which doesn't represent any file.
-    buffered_file() FMT_NOEXCEPT : file_(FMT_NULL) {}
+ public:
+  // Constructs a buffered_file object which doesn't represent any file.
+  buffered_file() FMT_NOEXCEPT : file_(FMT_NULL) {}
 
-    // Destroys the object closing the file it represents if any.
-    FMT_API ~buffered_file() FMT_DTOR_NOEXCEPT;
+  // Destroys the object closing the file it represents if any.
+  FMT_API ~buffered_file() FMT_DTOR_NOEXCEPT;
 
-#if !FMT_USE_RVALUE_REFERENCES
-    // Emulate a move constructor and a move assignment operator if rvalue
-    // references are not supported.
+ private:
+  buffered_file(const buffered_file &) = delete;
+  void operator=(const buffered_file &) = delete;
 
-private:
-    // A proxy object to emulate a move constructor.
-    // It is private to make it impossible call operator Proxy directly.
-    struct Proxy
-    {
-        FILE *file;
-    };
 
-public:
-    // A "move constructor" for moving from a temporary.
-    buffered_file(Proxy p) FMT_NOEXCEPT : file_(p.file) {}
+ public:
+  buffered_file(buffered_file &&other) FMT_NOEXCEPT : file_(other.file_) {
+    other.file_ = FMT_NULL;
+  }
 
-    // A "move constructor" for moving from an lvalue.
-    buffered_file(buffered_file &f) FMT_NOEXCEPT : file_(f.file_)
-    {
-        f.file_ = FMT_NULL;
-    }
+  buffered_file& operator=(buffered_file &&other) {
+    close();
+    file_ = other.file_;
+    other.file_ = FMT_NULL;
+    return *this;
+  }
 
-    // A "move assignment operator" for moving from a temporary.
-    buffered_file &operator=(Proxy p)
-    {
-        close();
-        file_ = p.file;
-        return *this;
-    }
+  // Opens a file.
+  FMT_API buffered_file(cstring_view filename, cstring_view mode);
 
-    // A "move assignment operator" for moving from an lvalue.
-    buffered_file &operator=(buffered_file &other)
-    {
-        close();
-        file_ = other.file_;
-        other.file_ = FMT_NULL;
-        return *this;
-    }
+  // Closes the file.
+  FMT_API void close();
 
-    // Returns a proxy object for moving from a temporary:
-    //   buffered_file file = buffered_file(...);
-    operator Proxy() FMT_NOEXCEPT
-    {
-        Proxy p = {file_};
-        file_ = FMT_NULL;
-        return p;
-    }
+  // Returns the pointer to a FILE object representing this file.
+  FILE *get() const FMT_NOEXCEPT { return file_; }
 
-#else
-private:
-    FMT_DISALLOW_COPY_AND_ASSIGN(buffered_file);
+  // We place parentheses around fileno to workaround a bug in some versions
+  // of MinGW that define fileno as a macro.
+  FMT_API int (fileno)() const;
 
-public:
-    buffered_file(buffered_file &&other) FMT_NOEXCEPT : file_(other.file_)
-    {
-        other.file_ = FMT_NULL;
-    }
+  void vprint(string_view format_str, format_args args) {
+    fmt::vprint(file_, format_str, args);
+  }
 
-    buffered_file &operator=(buffered_file &&other)
-    {
-        close();
-        file_ = other.file_;
-        other.file_ = FMT_NULL;
-        return *this;
-    }
-#endif
-
-    // Opens a file.
-    FMT_API buffered_file(cstring_view filename, cstring_view mode);
-
-    // Closes the file.
-    FMT_API void close();
-
-    // Returns the pointer to a FILE object representing this file.
-    FILE *get() const FMT_NOEXCEPT
-    {
-        return file_;
-    }
-
-    // We place parentheses around fileno to workaround a bug in some versions
-    // of MinGW that define fileno as a macro.
-    FMT_API int(fileno)() const;
-
-    void vprint(string_view format_str, format_args args)
-    {
-        fmt::vprint(file_, format_str, args);
-    }
-
-    template<typename... Args>
-    inline void print(string_view format_str, const Args &... args)
-    {
-        vprint(format_str, make_format_args(args...));
-    }
+  template <typename... Args>
+  inline void print(string_view format_str, const Args & ... args) {
+    vprint(format_str, make_format_args(args...));
+  }
 };
 
 // A file. Closed file is represented by a file object with descriptor -1.
@@ -259,226 +185,140 @@ public:
 // closing the file multiple times will cause a crash on Windows rather
 // than an exception. You can get standard behavior by overriding the
 // invalid parameter handler with _set_invalid_parameter_handler.
-class file
-{
-private:
-    int fd_; // File descriptor.
+class file {
+ private:
+  int fd_;  // File descriptor.
 
-    // Constructs a file object with a given descriptor.
-    explicit file(int fd)
-        : fd_(fd)
-    {
-    }
+  // Constructs a file object with a given descriptor.
+  explicit file(int fd) : fd_(fd) {}
 
-public:
-    // Possible values for the oflag argument to the constructor.
-    enum
-    {
-        RDONLY = FMT_POSIX(O_RDONLY), // Open for reading only.
-        WRONLY = FMT_POSIX(O_WRONLY), // Open for writing only.
-        RDWR = FMT_POSIX(O_RDWR)      // Open for reading and writing.
-    };
+ public:
+  // Possible values for the oflag argument to the constructor.
+  enum {
+    RDONLY = FMT_POSIX(O_RDONLY), // Open for reading only.
+    WRONLY = FMT_POSIX(O_WRONLY), // Open for writing only.
+    RDWR   = FMT_POSIX(O_RDWR)    // Open for reading and writing.
+  };
 
-    // Constructs a file object which doesn't represent any file.
-    file() FMT_NOEXCEPT : fd_(-1) {}
+  // Constructs a file object which doesn't represent any file.
+  file() FMT_NOEXCEPT : fd_(-1) {}
 
-    // Opens a file and constructs a file object representing this file.
-    FMT_API file(cstring_view path, int oflag);
+  // Opens a file and constructs a file object representing this file.
+  FMT_API file(cstring_view path, int oflag);
 
-#if !FMT_USE_RVALUE_REFERENCES
-    // Emulate a move constructor and a move assignment operator if rvalue
-    // references are not supported.
+ private:
+  file(const file &) = delete;
+  void operator=(const file &) = delete;
 
-private:
-    // A proxy object to emulate a move constructor.
-    // It is private to make it impossible call operator Proxy directly.
-    struct Proxy
-    {
-        int fd;
-    };
+ public:
+  file(file &&other) FMT_NOEXCEPT : fd_(other.fd_) {
+    other.fd_ = -1;
+  }
 
-public:
-    // A "move constructor" for moving from a temporary.
-    file(Proxy p) FMT_NOEXCEPT : fd_(p.fd) {}
+  file& operator=(file &&other) {
+    close();
+    fd_ = other.fd_;
+    other.fd_ = -1;
+    return *this;
+  }
 
-    // A "move constructor" for moving from an lvalue.
-    file(file &other) FMT_NOEXCEPT : fd_(other.fd_)
-    {
-        other.fd_ = -1;
-    }
+  // Destroys the object closing the file it represents if any.
+  FMT_API ~file() FMT_DTOR_NOEXCEPT;
 
-    // A "move assignment operator" for moving from a temporary.
-    file &operator=(Proxy p)
-    {
-        close();
-        fd_ = p.fd;
-        return *this;
-    }
+  // Returns the file descriptor.
+  int descriptor() const FMT_NOEXCEPT { return fd_; }
 
-    // A "move assignment operator" for moving from an lvalue.
-    file &operator=(file &other)
-    {
-        close();
-        fd_ = other.fd_;
-        other.fd_ = -1;
-        return *this;
-    }
+  // Closes the file.
+  FMT_API void close();
 
-    // Returns a proxy object for moving from a temporary:
-    //   file f = file(...);
-    operator Proxy() FMT_NOEXCEPT
-    {
-        Proxy p = {fd_};
-        fd_ = -1;
-        return p;
-    }
+  // Returns the file size. The size has signed type for consistency with
+  // stat::st_size.
+  FMT_API long long size() const;
 
-#else
-private:
-    FMT_DISALLOW_COPY_AND_ASSIGN(file);
+  // Attempts to read count bytes from the file into the specified buffer.
+  FMT_API std::size_t read(void *buffer, std::size_t count);
 
-public:
-    file(file &&other) FMT_NOEXCEPT : fd_(other.fd_)
-    {
-        other.fd_ = -1;
-    }
+  // Attempts to write count bytes from the specified buffer to the file.
+  FMT_API std::size_t write(const void *buffer, std::size_t count);
 
-    file &operator=(file &&other)
-    {
-        close();
-        fd_ = other.fd_;
-        other.fd_ = -1;
-        return *this;
-    }
-#endif
+  // Duplicates a file descriptor with the dup function and returns
+  // the duplicate as a file object.
+  FMT_API static file dup(int fd);
 
-    // Destroys the object closing the file it represents if any.
-    FMT_API ~file() FMT_DTOR_NOEXCEPT;
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  FMT_API void dup2(int fd);
 
-    // Returns the file descriptor.
-    int descriptor() const FMT_NOEXCEPT
-    {
-        return fd_;
-    }
+  // 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;
 
-    // Closes the file.
-    FMT_API void close();
+  // Creates a pipe setting up read_end and write_end file objects for reading
+  // and writing respectively.
+  FMT_API static void pipe(file &read_end, file &write_end);
 
-    // Returns the file size. The size has signed type for consistency with
-    // stat::st_size.
-    FMT_API long long size() const;
-
-    // Attempts to read count bytes from the file into the specified buffer.
-    FMT_API std::size_t read(void *buffer, std::size_t count);
-
-    // Attempts to write count bytes from the specified buffer to the file.
-    FMT_API std::size_t write(const void *buffer, std::size_t count);
-
-    // Duplicates a file descriptor with the dup function and returns
-    // the duplicate as a file object.
-    FMT_API static file dup(int fd);
-
-    // Makes fd be the copy of this file descriptor, closing fd first if
-    // necessary.
-    FMT_API void dup2(int fd);
-
-    // 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;
-
-    // Creates a pipe setting up read_end and write_end file objects for reading
-    // and writing respectively.
-    FMT_API static void pipe(file &read_end, file &write_end);
-
-    // Creates a buffered_file object associated with this file and detaches
-    // this file object from the file.
-    FMT_API buffered_file fdopen(const char *mode);
+  // Creates a buffered_file object associated with this file and detaches
+  // this file object from the file.
+  FMT_API buffered_file fdopen(const char *mode);
 };
 
 // Returns the memory page size.
 long getpagesize();
 
-#if (defined(LC_NUMERIC_MASK) || defined(_MSC_VER)) && !defined(__ANDROID__) && !defined(__CYGWIN__) && !defined(__OpenBSD__)
-#define FMT_LOCALE
+#if (defined(LC_NUMERIC_MASK) || defined(_MSC_VER)) && \
+    !defined(__ANDROID__) && !defined(__CYGWIN__) && !defined(__OpenBSD__) && \
+    !defined(__NEWLIB_H__)
+# define FMT_LOCALE
 #endif
 
 #ifdef FMT_LOCALE
 // A "C" numeric locale.
-class Locale
-{
-private:
-#ifdef _MSC_VER
-    typedef _locale_t locale_t;
+class Locale {
+ private:
+# ifdef _MSC_VER
+  typedef _locale_t locale_t;
 
-    enum
-    {
-        LC_NUMERIC_MASK = LC_NUMERIC
-    };
+  enum { LC_NUMERIC_MASK = LC_NUMERIC };
 
-    static locale_t newlocale(int category_mask, const char *locale, locale_t)
-    {
-        return _create_locale(category_mask, locale);
-    }
+  static locale_t newlocale(int category_mask, const char *locale, locale_t) {
+    return _create_locale(category_mask, locale);
+  }
 
-    static void freelocale(locale_t locale)
-    {
-        _free_locale(locale);
-    }
+  static void freelocale(locale_t locale) {
+    _free_locale(locale);
+  }
 
-    static double strtod_l(const char *nptr, char **endptr, _locale_t locale)
-    {
-        return _strtod_l(nptr, endptr, locale);
-    }
-#endif
+  static double strtod_l(const char *nptr, char **endptr, _locale_t locale) {
+    return _strtod_l(nptr, endptr, locale);
+  }
+# endif
 
-    locale_t locale_;
+  locale_t locale_;
 
-    FMT_DISALLOW_COPY_AND_ASSIGN(Locale);
+  Locale(const Locale &) = delete;
+  void operator=(const Locale &) = delete;
 
-public:
-    typedef locale_t Type;
+ public:
+  typedef locale_t Type;
 
-    Locale()
-        : locale_(newlocale(LC_NUMERIC_MASK, "C", FMT_NULL))
-    {
-        if (!locale_)
-            FMT_THROW(system_error(errno, "cannot create locale"));
-    }
-    ~Locale()
-    {
-        freelocale(locale_);
-    }
+  Locale() : locale_(newlocale(LC_NUMERIC_MASK, "C", FMT_NULL)) {
+    if (!locale_)
+      FMT_THROW(system_error(errno, "cannot create locale"));
+  }
+  ~Locale() { freelocale(locale_); }
 
-    Type get() const
-    {
-        return locale_;
-    }
+  Type get() const { return locale_; }
 
-    // Converts string to floating-point number and advances str past the end
-    // of the parsed input.
-    double strtod(const char *&str) const
-    {
-        char *end = FMT_NULL;
-        double result = strtod_l(str, &end, locale_);
-        str = end;
-        return result;
-    }
+  // Converts string to floating-point number and advances str past the end
+  // of the parsed input.
+  double strtod(const char *&str) const {
+    char *end = FMT_NULL;
+    double result = strtod_l(str, &end, locale_);
+    str = end;
+    return result;
+  }
 };
-#endif // FMT_LOCALE
+#endif  // FMT_LOCALE
 FMT_END_NAMESPACE
 
-#if !FMT_USE_RVALUE_REFERENCES
-namespace std {
-// For compatibility with C++98.
-inline fmt::buffered_file &move(fmt::buffered_file &f)
-{
-    return f;
-}
-inline fmt::file &move(fmt::file &f)
-{
-    return f;
-}
-} // namespace std
-#endif
-
-#endif // FMT_POSIX_H_
+#endif  // FMT_POSIX_H_

include/spdlog/fmt/bundled/ranges.h

@@ -17,328 +17,292 @@
 
 // output only up to N items from the range.
 #ifndef FMT_RANGE_OUTPUT_LENGTH_LIMIT
-#define FMT_RANGE_OUTPUT_LENGTH_LIMIT 256
+# define FMT_RANGE_OUTPUT_LENGTH_LIMIT 256
 #endif
 
 FMT_BEGIN_NAMESPACE
 
-template<typename Char>
-struct formatting_base
-{
-    template<typename ParseContext>
-    FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin())
-    {
-        return ctx.begin();
-    }
+template <typename Char>
+struct formatting_base {
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
+    return ctx.begin();
+  }
 };
 
-template<typename Char, typename Enable = void>
-struct formatting_range : formatting_base<Char>
-{
-    static FMT_CONSTEXPR_DECL const std::size_t range_length_limit = 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>
+struct formatting_range : formatting_base<Char> {
+  static FMT_CONSTEXPR_DECL const std::size_t range_length_limit =
+      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>
-struct formatting_tuple : formatting_base<Char>
-{
-    Char prefix;
-    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;
+template <typename Char, typename Enable = void>
+struct formatting_tuple : formatting_base<Char> {
+  Char prefix;
+  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 internal {
 
-template<typename RangeT, typename OutputIterator>
-void copy(const RangeT &range, OutputIterator out)
-{
-    for (auto it = range.begin(), end = range.end(); it != end; ++it)
-        *out++ = *it;
+template <typename RangeT, typename OutputIterator>
+void copy(const RangeT &range, OutputIterator out) {
+  for (auto it = range.begin(), end = range.end(); it != end; ++it)
+    *out++ = *it;
 }
 
-template<typename OutputIterator>
-void copy(const char *str, OutputIterator out)
-{
-    const char *p_curr = str;
-    while (*p_curr)
-    {
-        *out++ = *p_curr++;
-    }
+template <typename OutputIterator>
+void copy(const char *str, OutputIterator out) {
+  const char *p_curr = str;
+  while (*p_curr) {
+    *out++ = *p_curr++;
+  }
 }
 
-template<typename OutputIterator>
-void copy(char ch, OutputIterator out)
-{
-    *out++ = ch;
+template <typename OutputIterator>
+void copy(char ch, OutputIterator out) {
+  *out++ = ch;
 }
 
 /// Return true value if T has std::string interface, like std::string_view.
-template<typename T>
-class is_like_std_string
-{
-    template<typename U>
-    static auto check(U *p) -> decltype(p->find('a'), p->length(), p->data(), int());
-    template<typename>
-    static void check(...);
+template <typename T>
+class is_like_std_string {
+  template <typename U>
+  static auto check(U *p) ->
+    decltype(p->find('a'), p->length(), p->data(), int());
+  template <typename>
+  static void check(...);
 
-public:
-    static FMT_CONSTEXPR_DECL const bool value = !std::is_void<decltype(check<T>(FMT_NULL))>::value;
+ public:
+  static FMT_CONSTEXPR_DECL const bool value =
+    !std::is_void<decltype(check<T>(FMT_NULL))>::value;
 };
 
-template<typename... Ts>
-struct conditional_helper
-{
-};
+template <typename Char>
+struct is_like_std_string<fmt::basic_string_view<Char>> : std::true_type {};
 
-template<typename T, typename _ = void>
-struct is_range_ : std::false_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
-template<typename T>
-struct is_range_<T, typename std::conditional<false,
-                        conditional_helper<decltype(internal::declval<T>().begin()), decltype(internal::declval<T>().end())>, void>::type>
-    : std::true_type
-{
-};
+template <typename T>
+struct is_range_<T, typename std::conditional<
+                    false,
+                    conditional_helper<decltype(internal::declval<T>().begin()),
+                                       decltype(internal::declval<T>().end())>,
+                    void>::type> : std::true_type {};
 #endif
 
 /// tuple_size and tuple_element check.
-template<typename T>
-class is_tuple_like_
-{
-    template<typename U>
-    static auto check(U *p) -> decltype(std::tuple_size<U>::value, internal::declval<typename std::tuple_element<0, U>::type>(), int());
-    template<typename>
-    static void check(...);
+template <typename T>
+class is_tuple_like_ {
+  template <typename U>
+  static auto check(U *p) ->
+    decltype(std::tuple_size<U>::value,
+      internal::declval<typename std::tuple_element<0, U>::type>(), int());
+  template <typename>
+  static void check(...);
 
-public:
-    static FMT_CONSTEXPR_DECL const bool value = !std::is_void<decltype(check<T>(FMT_NULL))>::value;
+ public:
+  static FMT_CONSTEXPR_DECL const bool value =
+    !std::is_void<decltype(check<T>(FMT_NULL))>::value;
 };
 
 // Check for integer_sequence
 #if defined(__cpp_lib_integer_sequence) || FMT_MSC_VER >= 1900
-template<typename T, T... N>
+template <typename T, T... N>
 using integer_sequence = std::integer_sequence<T, N...>;
-template<std::size_t... N>
+template <std::size_t... N>
 using index_sequence = std::index_sequence<N...>;
-template<std::size_t N>
+template <std::size_t N>
 using make_index_sequence = std::make_index_sequence<N>;
 #else
-template<typename T, T... N>
-struct integer_sequence
-{
-    typedef T value_type;
+template <typename T, T... N>
+struct integer_sequence {
+  typedef T value_type;
 
-    static FMT_CONSTEXPR std::size_t size()
-    {
-        return sizeof...(N);
-    }
+  static FMT_CONSTEXPR std::size_t size() {
+    return sizeof...(N);
+  }
 };
 
-template<std::size_t... N>
+template <std::size_t... N>
 using index_sequence = integer_sequence<std::size_t, N...>;
 
-template<typename T, std::size_t N, T... Ns>
-struct make_integer_sequence : make_integer_sequence<T, N - 1, N - 1, Ns...>
-{
-};
-template<typename T, T... Ns>
-struct make_integer_sequence<T, 0, Ns...> : integer_sequence<T, Ns...>
-{
-};
+template <typename T, std::size_t N, T... Ns>
+struct make_integer_sequence : make_integer_sequence<T, N - 1, N - 1, Ns...> {};
+template <typename T, T... Ns>
+struct make_integer_sequence<T, 0, Ns...> : integer_sequence<T, Ns...> {};
 
-template<std::size_t N>
+template <std::size_t N>
 using make_index_sequence = make_integer_sequence<std::size_t, N>;
 #endif
 
-template<class Tuple, class F, size_t... Is>
-void for_each(index_sequence<Is...>, Tuple &&tup, F &&f) FMT_NOEXCEPT
-{
-    using std::get;
-    // using free function get<I>(T) now.
-    const int _[] = {0, ((void)f(get<Is>(tup)), 0)...};
-    (void)_; // blocks warnings
+template <class Tuple, class F, size_t... Is>
+void for_each(index_sequence<Is...>, Tuple &&tup, F &&f) FMT_NOEXCEPT {
+  using std::get;
+  // using free function get<I>(T) now.
+  const int _[] = {0, ((void)f(get<Is>(tup)), 0)...};
+  (void)_;  // blocks warnings
 }
 
-template<class T>
-FMT_CONSTEXPR make_index_sequence<std::tuple_size<T>::value> get_indexes(T const &)
-{
-    return {};
-}
+template <class T>
+FMT_CONSTEXPR make_index_sequence<std::tuple_size<T>::value> 
+get_indexes(T const &) { return {}; }
 
-template<class Tuple, class F>
-void for_each(Tuple &&tup, F &&f)
-{
-    const auto indexes = get_indexes(tup);
-    for_each(indexes, std::forward<Tuple>(tup), std::forward<F>(f));
+template <class Tuple, class F>
+void for_each(Tuple &&tup, F &&f) {
+  const auto indexes = get_indexes(tup);
+  for_each(indexes, std::forward<Tuple>(tup), std::forward<F>(f));
 }
 
 template<typename Arg>
-FMT_CONSTEXPR const char *format_str_quoted(
-    bool add_space, const Arg &, typename std::enable_if<!is_like_std_string<typename std::decay<Arg>::type>::value>::type * = nullptr)
-{
-    return add_space ? " {}" : "{}";
+FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const Arg&, 
+  typename std::enable_if<
+    !is_like_std_string<typename std::decay<Arg>::type>::value>::type* = nullptr) {
+  return add_space ? " {}" : "{}";
 }
 
 template<typename Arg>
-FMT_CONSTEXPR const char *format_str_quoted(
-    bool add_space, const Arg &, typename std::enable_if<is_like_std_string<typename std::decay<Arg>::type>::value>::type * = nullptr)
-{
-    return add_space ? " \"{}\"" : "\"{}\"";
+FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const Arg&, 
+  typename std::enable_if<
+    is_like_std_string<typename std::decay<Arg>::type>::value>::type* = nullptr) {
+  return add_space ? " \"{}\"" : "\"{}\"";
 }
 
-FMT_CONSTEXPR const char *format_str_quoted(bool add_space, const char *)
-{
-    return add_space ? " \"{}\"" : "\"{}\"";
+FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const char*) {
+  return add_space ? " \"{}\"" : "\"{}\"";
 }
-FMT_CONSTEXPR const wchar_t *format_str_quoted(bool add_space, const wchar_t *)
-{
+FMT_CONSTEXPR const wchar_t* format_str_quoted(bool add_space, const wchar_t*) {
     return add_space ? L" \"{}\"" : L"\"{}\"";
 }
 
-FMT_CONSTEXPR const char *format_str_quoted(bool add_space, const char)
-{
+FMT_CONSTEXPR const char* format_str_quoted(bool add_space, const char) {
     return add_space ? " '{}'" : "'{}'";
 }
-FMT_CONSTEXPR const wchar_t *format_str_quoted(bool add_space, const wchar_t)
-{
+FMT_CONSTEXPR const wchar_t* format_str_quoted(bool add_space, const wchar_t) {
     return add_space ? L" '{}'" : L"'{}'";
 }
 
-} // namespace internal
+}  // namespace internal
 
-template<typename T>
-struct is_tuple_like
-{
-    static FMT_CONSTEXPR_DECL const bool value = internal::is_tuple_like_<T>::value && !internal::is_range_<T>::value;
+template <typename T>
+struct is_tuple_like {
+  static FMT_CONSTEXPR_DECL const bool value =
+    internal::is_tuple_like_<T>::value && !internal::is_range_<T>::value;
 };
 
-template<typename TupleT, typename Char>
-struct formatter<TupleT, Char, typename std::enable_if<fmt::is_tuple_like<TupleT>::value>::type>
-{
+template <typename TupleT, typename Char>
+struct formatter<TupleT, Char, 
+    typename std::enable_if<fmt::is_tuple_like<TupleT>::value>::type> {
 private:
-    // C++11 generic lambda for format()
-    template<typename FormatContext>
-    struct format_each
-    {
-        template<typename T>
-        void operator()(const T &v)
-        {
-            if (i > 0)
-            {
-                if (formatting.add_prepostfix_space)
-                {
-                    *out++ = ' ';
-                }
-                internal::copy(formatting.delimiter, out);
-            }
-            format_to(out, internal::format_str_quoted((formatting.add_delimiter_spaces && i > 0), v), v);
-            ++i;
+  // C++11 generic lambda for format()
+  template <typename FormatContext>
+  struct format_each {
+    template <typename T>
+    void operator()(const T& v) {
+      if (i > 0) {
+        if (formatting.add_prepostfix_space) {
+          *out++ = ' ';
         }
+        internal::copy(formatting.delimiter, out);
+      }
+      format_to(out,
+                internal::format_str_quoted(
+                    (formatting.add_delimiter_spaces && i > 0), v),
+                v);
+      ++i;
+    }
 
-        formatting_tuple<Char> &formatting;
-        std::size_t &i;
-        typename std::add_lvalue_reference<decltype(std::declval<FormatContext>().out())>::type out;
-    };
+    formatting_tuple<Char>& formatting;
+    std::size_t& i;
+    typename std::add_lvalue_reference<decltype(std::declval<FormatContext>().out())>::type out;
+  };
 
 public:
-    formatting_tuple<Char> formatting;
+  formatting_tuple<Char> formatting;
 
-    template<typename ParseContext>
-    FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin())
-    {
-        return formatting.parse(ctx);
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
+    return formatting.parse(ctx);
+  }
+
+  template <typename FormatContext = format_context>
+  auto format(const TupleT &values, FormatContext &ctx) -> decltype(ctx.out()) {
+    auto out = ctx.out();
+    std::size_t i = 0;
+    internal::copy(formatting.prefix, out);
+
+    internal::for_each(values, format_each<FormatContext>{formatting, i, out});
+    if (formatting.add_prepostfix_space) {
+      *out++ = ' ';
     }
+    internal::copy(formatting.postfix, out);
 
-    template<typename FormatContext = format_context>
-    auto format(const TupleT &values, FormatContext &ctx) -> decltype(ctx.out())
-    {
-        auto out = ctx.out();
-        std::size_t i = 0;
-        internal::copy(formatting.prefix, out);
-
-        internal::for_each(values, format_each<FormatContext>{formatting, i, out});
-        if (formatting.add_prepostfix_space)
-        {
-            *out++ = ' ';
-        }
-        internal::copy(formatting.postfix, out);
-
-        return ctx.out();
-    }
+    return ctx.out();
+  }
 };
 
-template<typename T>
-struct is_range
-{
-    static FMT_CONSTEXPR_DECL const bool value = internal::is_range_<T>::value && !internal::is_like_std_string<T>::value;
+template <typename T>
+struct is_range {
+  static FMT_CONSTEXPR_DECL const bool value =
+    internal::is_range_<T>::value && !internal::is_like_std_string<T>::value;
 };
 
-template<typename RangeT, typename Char>
-struct formatter<RangeT, Char, typename std::enable_if<fmt::is_range<RangeT>::value>::type>
-{
+template <typename RangeT, typename Char>
+struct formatter<RangeT, Char,
+    typename std::enable_if<fmt::is_range<RangeT>::value>::type> {
 
-    formatting_range<Char> formatting;
+  formatting_range<Char> formatting;
 
-    template<typename ParseContext>
-    FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin())
-    {
-        return formatting.parse(ctx);
-    }
+  template <typename ParseContext>
+  FMT_CONSTEXPR auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
+    return formatting.parse(ctx);
+  }
 
-    template<typename FormatContext>
-    typename FormatContext::iterator format(const RangeT &values, FormatContext &ctx)
-    {
-        auto out = ctx.out();
-        internal::copy(formatting.prefix, out);
-        std::size_t i = 0;
-        for (auto it = values.begin(), end = values.end(); it != end; ++it)
-        {
-            if (i > 0)
-            {
-                if (formatting.add_prepostfix_space)
-                {
-                    *out++ = ' ';
-                }
-                internal::copy(formatting.delimiter, out);
-            }
-            format_to(out, internal::format_str_quoted((formatting.add_delimiter_spaces && i > 0), *it), *it);
-            if (++i > formatting.range_length_limit)
-            {
-                format_to(out, " ... <other elements>");
-                break;
-            }
+  template <typename FormatContext>
+  typename FormatContext::iterator format(
+      const RangeT &values, FormatContext &ctx) {
+    auto out = ctx.out();
+    internal::copy(formatting.prefix, out);
+    std::size_t i = 0;
+    for (auto it = values.begin(), end = values.end(); it != end; ++it) {
+      if (i > 0) {
+        if (formatting.add_prepostfix_space) {
+          *out++ = ' ';
         }
-        if (formatting.add_prepostfix_space)
-        {
-            *out++ = ' ';
-        }
-        internal::copy(formatting.postfix, out);
-        return ctx.out();
+        internal::copy(formatting.delimiter, out);
+      }
+      format_to(out,
+                internal::format_str_quoted(
+                    (formatting.add_delimiter_spaces && i > 0), *it),
+                *it);
+      if (++i > formatting.range_length_limit) {
+        format_to(out, " ... <other elements>");
+        break;
+      }
     }
+    if (formatting.add_prepostfix_space) {
+      *out++ = ' ';
+    }
+    internal::copy(formatting.postfix, out);
+    return ctx.out();
+  }
 };
 
 FMT_END_NAMESPACE
 
 #endif // FMT_RANGES_H_
+

include/spdlog/fmt/bundled/time.h

@@ -13,187 +13,144 @@
 
 FMT_BEGIN_NAMESPACE
 
-namespace internal {
-inline null<> localtime_r(...)
-{
-    return null<>();
+// Prevents expansion of a preceding token as a function-style macro.
+// Usage: f FMT_NOMACRO()
+#define FMT_NOMACRO
+
+namespace internal{
+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 null<> localtime_s(...)
-{
-    return null<>();
-}
-inline null<> gmtime_r(...)
-{
-    return null<>();
-}
-inline null<> gmtime_s(...)
-{
-    return null<>();
-}
-} // namespace internal
 
 // Thread-safe replacement for std::localtime
-inline std::tm localtime(std::time_t time)
-{
-    struct dispatcher
-    {
-        std::time_t time_;
-        std::tm tm_;
+inline std::tm localtime(std::time_t time) {
+  struct dispatcher {
+    std::time_t time_;
+    std::tm tm_;
 
-        dispatcher(std::time_t t)
-            : time_(t)
-        {
-        }
+    dispatcher(std::time_t t): time_(t) {}
 
-        bool run()
-        {
-            using namespace fmt::internal;
-            return handle(localtime_r(&time_, &tm_));
-        }
+    bool run() {
+      using namespace fmt::internal;
+      return handle(localtime_r(&time_, &tm_));
+    }
 
-        bool handle(std::tm *tm)
-        {
-            return tm != FMT_NULL;
-        }
+    bool handle(std::tm *tm) { return tm != FMT_NULL; }
 
-        bool handle(internal::null<>)
-        {
-            using namespace fmt::internal;
-            return fallback(localtime_s(&tm_, &time_));
-        }
+    bool handle(internal::null<>) {
+      using namespace fmt::internal;
+      return fallback(localtime_s(&tm_, &time_));
+    }
 
-        bool fallback(int res)
-        {
-            return res == 0;
-        }
+    bool fallback(int res) { return res == 0; }
 
-        bool fallback(internal::null<>)
-        {
-            using namespace fmt::internal;
-            std::tm *tm = std::localtime(&time_);
-            if (tm)
-                tm_ = *tm;
-            return tm != FMT_NULL;
-        }
-    };
-    dispatcher lt(time);
-    if (lt.run())
-        return lt.tm_;
-    // Too big time values may be unsupported.
-    FMT_THROW(format_error("time_t value out of range"));
+    bool fallback(internal::null<>) {
+      using namespace fmt::internal;
+      std::tm *tm = std::localtime(&time_);
+      if (tm) tm_ = *tm;
+      return tm != FMT_NULL;
+    }
+  };
+  dispatcher lt(time);
+  if (lt.run())
+    return lt.tm_;
+  // Too big time values may be unsupported.
+  FMT_THROW(format_error("time_t value out of range"));
 }
 
 // Thread-safe replacement for std::gmtime
-inline std::tm gmtime(std::time_t time)
-{
-    struct dispatcher
-    {
-        std::time_t time_;
-        std::tm tm_;
+inline std::tm gmtime(std::time_t time) {
+  struct dispatcher {
+    std::time_t time_;
+    std::tm tm_;
 
-        dispatcher(std::time_t t)
-            : time_(t)
-        {
-        }
+    dispatcher(std::time_t t): time_(t) {}
 
-        bool run()
-        {
-            using namespace fmt::internal;
-            return handle(gmtime_r(&time_, &tm_));
-        }
+    bool run() {
+      using namespace fmt::internal;
+      return handle(gmtime_r(&time_, &tm_));
+    }
 
-        bool handle(std::tm *tm)
-        {
-            return tm != FMT_NULL;
-        }
+    bool handle(std::tm *tm) { return tm != FMT_NULL; }
 
-        bool handle(internal::null<>)
-        {
-            using namespace fmt::internal;
-            return fallback(gmtime_s(&tm_, &time_));
-        }
+    bool handle(internal::null<>) {
+      using namespace fmt::internal;
+      return fallback(gmtime_s(&tm_, &time_));
+    }
 
-        bool fallback(int res)
-        {
-            return res == 0;
-        }
+    bool fallback(int res) { return res == 0; }
 
-        bool fallback(internal::null<>)
-        {
-            std::tm *tm = std::gmtime(&time_);
-            if (tm)
-                tm_ = *tm;
-            return tm != FMT_NULL;
-        }
-    };
-    dispatcher gt(time);
-    if (gt.run())
-        return gt.tm_;
-    // Too big time values may be unsupported.
-    FMT_THROW(format_error("time_t value out of range"));
+    bool fallback(internal::null<>) {
+      std::tm *tm = std::gmtime(&time_);
+      if (tm) tm_ = *tm;
+      return tm != FMT_NULL;
+    }
+  };
+  dispatcher gt(time);
+  if (gt.run())
+    return gt.tm_;
+  // Too big time values may be unsupported.
+  FMT_THROW(format_error("time_t value out of range"));
 }
 
 namespace internal {
-inline std::size_t strftime(char *str, std::size_t count, const char *format, const std::tm *time)
-{
-    return std::strftime(str, count, format, time);
+inline std::size_t strftime(char *str, std::size_t count, const char *format,
+                            const std::tm *time) {
+  return std::strftime(str, count, format, time);
 }
 
-inline std::size_t strftime(wchar_t *str, std::size_t count, const wchar_t *format, const std::tm *time)
-{
-    return std::wcsftime(str, count, format, time);
+inline std::size_t strftime(wchar_t *str, std::size_t count,
+                            const wchar_t *format, const std::tm *time) {
+  return std::wcsftime(str, count, format, time);
+}
 }
-} // namespace internal
 
-template<typename Char>
-struct formatter<std::tm, Char>
-{
-    template<typename ParseContext>
-    auto parse(ParseContext &ctx) -> decltype(ctx.begin())
-    {
-        auto it = internal::null_terminating_iterator<Char>(ctx);
-        if (*it == ':')
-            ++it;
-        auto end = it;
-        while (*end && *end != '}')
-            ++end;
-        tm_format.reserve(end - it + 1);
-        using internal::pointer_from;
-        tm_format.append(pointer_from(it), pointer_from(end));
-        tm_format.push_back('\0');
-        return pointer_from(end);
+template <typename Char>
+struct formatter<std::tm, Char> {
+  template <typename ParseContext>
+  auto parse(ParseContext &ctx) -> decltype(ctx.begin()) {
+    auto it = internal::null_terminating_iterator<Char>(ctx);
+    if (*it == ':')
+      ++it;
+    auto end = it;
+    while (*end && *end != '}')
+      ++end;
+    tm_format.reserve(end - it + 1);
+    using internal::pointer_from;
+    tm_format.append(pointer_from(it), pointer_from(end));
+    tm_format.push_back('\0');
+    return pointer_from(end);
+  }
+
+  template <typename FormatContext>
+  auto format(const std::tm &tm, FormatContext &ctx) -> decltype(ctx.out()) {
+    internal::basic_buffer<Char> &buf = internal::get_container(ctx.out());
+    std::size_t start = buf.size();
+    for (;;) {
+      std::size_t size = buf.capacity() - start;
+      std::size_t count =
+        internal::strftime(&buf[start], size, &tm_format[0], &tm);
+      if (count != 0) {
+        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 std::size_t MIN_GROWTH = 10;
+      buf.reserve(buf.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH));
     }
+    return ctx.out();
+  }
 
-    template<typename FormatContext>
-    auto format(const std::tm &tm, FormatContext &ctx) -> decltype(ctx.out())
-    {
-        internal::basic_buffer<Char> &buf = internal::get_container(ctx.out());
-        std::size_t start = buf.size();
-        for (;;)
-        {
-            std::size_t size = buf.capacity() - start;
-            std::size_t count = internal::strftime(&buf[start], size, &tm_format[0], &tm);
-            if (count != 0)
-            {
-                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 std::size_t MIN_GROWTH = 10;
-            buf.reserve(buf.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH));
-        }
-        return ctx.out();
-    }
-
-    basic_memory_buffer<Char> tm_format;
+  basic_memory_buffer<Char> tm_format;
 };
 FMT_END_NAMESPACE
 
-#endif // FMT_TIME_H_
+#endif  // FMT_TIME_H_

include/spdlog/logger.h

@@ -22,6 +22,7 @@
 #include "spdlog/formatter.h"
 #include "spdlog/sinks/sink.h"
 
+#include <locale>
 #include <memory>
 #include <string>
 #include <vector>
@@ -35,7 +36,7 @@ public:
     logger(std::string name, sinks_init_list sinks);
 
     template<typename It>
-    logger(std::string name, const It &begin, const It &end);
+    logger(std::string name, It begin, It end);
 
     virtual ~logger();
 
@@ -67,6 +68,9 @@ public:
     void critical(const char *fmt, const Args &... args);
 
 #ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+#ifndef _WIN32
+#error SPDLOG_WCHAR_TO_UTF8_SUPPORT only supported on windows
+#else
     template<typename... Args>
     void log(level::level_enum lvl, const wchar_t *fmt, const Args &... args);
 
@@ -87,6 +91,7 @@ public:
 
     template<typename... Args>
     void critical(const wchar_t *fmt, const Args &... args);
+#endif // _WIN32
 #endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
 
     template<typename T>
@@ -120,16 +125,22 @@ public:
     void set_formatter(std::unique_ptr<formatter> formatter);
     void set_pattern(std::string pattern, pattern_time_type time_type = pattern_time_type::local);
 
+    // flush functions
     void flush();
     void flush_on(level::level_enum log_level);
+    level::level_enum flush_level() const;
 
+    // sinks
     const std::vector<sink_ptr> &sinks() const;
-
     std::vector<sink_ptr> &sinks();
 
+    // error handler
     void set_error_handler(log_err_handler err_handler);
     log_err_handler error_handler();
 
+    // create new logger with same sinks and configuration.
+    virtual std::shared_ptr<logger> clone(std::string logger_name);
+
 protected:
     virtual void sink_it_(details::log_msg &msg);
     virtual void flush_();
@@ -140,8 +151,7 @@ protected:
     // message/minute
     void default_err_handler_(const std::string &msg);
 
-    // increment the message count (only if
-    // defined(SPDLOG_ENABLE_MESSAGE_COUNTER))
+    // increment the message count (only if defined(SPDLOG_ENABLE_MESSAGE_COUNTER))
     void incr_msg_counter_(details::log_msg &msg);
 
     const std::string name_;
@@ -151,11 +161,6 @@ protected:
     log_err_handler err_handler_;
     std::atomic<time_t> last_err_time_;
     std::atomic<size_t> msg_counter_;
-
-#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
-    std::wstring_convert<std::codecvt_utf8<wchar_t>> wstring_converter_;
-    std::mutex wstring_converter_mutex_;
-#endif
 };
 } // namespace spdlog
 

include/spdlog/sinks/android_sink.h

@@ -27,11 +27,11 @@ namespace sinks {
  * Android sink (logging using __android_log_write)
  */
 template<typename Mutex>
-class android_sink SPDLOG_FINAL : public base_sink<Mutex>
+class android_sink final : public base_sink<Mutex>
 {
 public:
-    explicit android_sink(const std::string &tag = "spdlog", bool use_raw_msg = false)
-        : tag_(tag)
+    explicit android_sink(std::string tag = "spdlog", bool use_raw_msg = false)
+        : tag_(std::move(tag))
         , use_raw_msg_(use_raw_msg)
     {
     }
@@ -43,11 +43,11 @@ protected:
         fmt::memory_buffer formatted;
         if (use_raw_msg_)
         {
-            fmt_helper::append_buf(msg.raw, formatted);
+            details::fmt_helper::append_buf(msg.raw, formatted);
         }
         else
         {
-            formatter_->format(msg, formatted);
+            sink::formatter_->format(msg, formatted);
         }
         formatted.push_back('\0');
         const char *msg_output = formatted.data();

include/spdlog/sinks/ansicolor_sink.h

@@ -8,6 +8,7 @@
 #include "spdlog/details/console_globals.h"
 #include "spdlog/details/null_mutex.h"
 #include "spdlog/details/os.h"
+#include "spdlog/sinks/sink.h"
 
 #include <memory>
 #include <mutex>
@@ -24,7 +25,7 @@ namespace sinks {
  * If no color terminal detected, omit the escape codes.
  */
 template<typename TargetStream, class ConsoleMutex>
-class ansicolor_sink : public sink
+class ansicolor_sink final : public sink
 {
 public:
     using mutex_t = typename ConsoleMutex::mutex_t;
@@ -84,7 +85,7 @@ public:
     const std::string on_cyan = "\033[46m";
     const std::string on_white = "\033[47m";
 
-    void log(const details::log_msg &msg) SPDLOG_FINAL override
+    void log(const details::log_msg &msg) override
     {
         // Wrap the originally formatted message in color codes.
         // If color is not supported in the terminal, log as is instead.
@@ -110,19 +111,19 @@ public:
         fflush(target_file_);
     }
 
-    void flush() SPDLOG_FINAL override
+    void flush() override
     {
         std::lock_guard<mutex_t> lock(mutex_);
         fflush(target_file_);
     }
 
-    void set_pattern(const std::string &pattern) override SPDLOG_FINAL
+    void set_pattern(const std::string &pattern) final
     {
         std::lock_guard<mutex_t> lock(mutex_);
         formatter_ = std::unique_ptr<spdlog::formatter>(new pattern_formatter(pattern));
     }
 
-    void set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter) override SPDLOG_FINAL
+    void set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter) override
     {
         std::lock_guard<mutex_t> lock(mutex_);
         formatter_ = std::move(sink_formatter);

include/spdlog/sinks/base_sink.h

@@ -22,41 +22,47 @@ template<typename Mutex>
 class base_sink : public sink
 {
 public:
-    base_sink()
-        : sink()
-    {
-    }
-
+    base_sink() = default;
     base_sink(const base_sink &) = delete;
     base_sink &operator=(const base_sink &) = delete;
 
-    void log(const details::log_msg &msg) SPDLOG_FINAL override
+    void log(const details::log_msg &msg) final
     {
         std::lock_guard<Mutex> lock(mutex_);
         sink_it_(msg);
     }
 
-    void flush() SPDLOG_FINAL override
+    void flush() final
     {
         std::lock_guard<Mutex> lock(mutex_);
         flush_();
     }
 
-    void set_pattern(const std::string &pattern) SPDLOG_FINAL override
+    void set_pattern(const std::string &pattern) final
     {
         std::lock_guard<Mutex> lock(mutex_);
-        formatter_ = std::unique_ptr<spdlog::formatter>(new pattern_formatter(pattern));
+        set_pattern_(pattern);
     }
 
-    void set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter) SPDLOG_FINAL override
+    void set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter) final
     {
         std::lock_guard<Mutex> lock(mutex_);
-        formatter_ = std::move(sink_formatter);
+        set_formatter_(std::move(sink_formatter));
     }
 
 protected:
     virtual void sink_it_(const details::log_msg &msg) = 0;
     virtual void flush_() = 0;
+
+    virtual void set_pattern_(const std::string &pattern)
+    {
+        set_formatter_(details::make_unique<spdlog::pattern_formatter>(pattern));
+    }
+
+    virtual void set_formatter_(std::unique_ptr<spdlog::formatter> sink_formatter)
+    {
+        formatter_ = std::move(sink_formatter);
+    }
     Mutex mutex_;
 };
 } // namespace sinks

include/spdlog/sinks/basic_file_sink.h

@@ -18,7 +18,7 @@ namespace sinks {
  * Trivial file sink with single file as target
  */
 template<typename Mutex>
-class basic_file_sink SPDLOG_FINAL : public base_sink<Mutex>
+class basic_file_sink final : public base_sink<Mutex>
 {
 public:
     explicit basic_file_sink(const filename_t &filename, bool truncate = false)

include/spdlog/sinks/daily_file_sink.h

@@ -40,7 +40,7 @@ struct daily_filename_calculator
  * Rotating file sink based on date. rotates at midnight
  */
 template<typename Mutex, typename FileNameCalc = daily_filename_calculator>
-class daily_file_sink SPDLOG_FINAL : public base_sink<Mutex>
+class daily_file_sink final : public base_sink<Mutex>
 {
 public:
     // create daily file sink which rotates on given time

include/spdlog/sinks/dist_sink.h

@@ -40,6 +40,12 @@ public:
         sinks_.erase(std::remove(sinks_.begin(), sinks_.end(), sink), sinks_.end());
     }
 
+    void set_sinks(std::vector<std::shared_ptr<sink>> sinks)
+    {
+        std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
+        sinks_ = std::move(sinks);
+    }
+
 protected:
     void sink_it_(const details::log_msg &msg) override
     {
@@ -56,7 +62,23 @@ protected:
     void flush_() override
     {
         for (auto &sink : sinks_)
+        {
             sink->flush();
+        }
+    }
+
+    void set_pattern_(const std::string &pattern) override
+    {
+        set_formatter_(spdlog::make_unique<spdlog::pattern_formatter>(pattern));
+    }
+
+    void set_formatter_(std::unique_ptr<spdlog::formatter> sink_formatter) override
+    {
+        base_sink<Mutex>::formatter_ = std::move(sink_formatter);
+        for (auto &sink : sinks_)
+        {
+            sink->set_formatter(base_sink<Mutex>::formatter_->clone());
+        }
     }
     std::vector<std::shared_ptr<sink>> sinks_;
 };

include/spdlog/sinks/ostream_sink.h

@@ -14,7 +14,7 @@
 namespace spdlog {
 namespace sinks {
 template<typename Mutex>
-class ostream_sink SPDLOG_FINAL : public base_sink<Mutex>
+class ostream_sink final : public base_sink<Mutex>
 {
 public:
     explicit ostream_sink(std::ostream &os, bool force_flush = false)
@@ -30,9 +30,11 @@ protected:
     {
         fmt::memory_buffer formatted;
         sink::formatter_->format(msg, formatted);
-        ostream_.write(formatted.data(), formatted.size());
+        ostream_.write(formatted.data(), static_cast<std::streamsize>(formatted.size()));
         if (force_flush_)
+        {
             ostream_.flush();
+        }
     }
 
     void flush_() override

include/spdlog/sinks/rotating_file_sink.h

@@ -24,7 +24,7 @@ namespace sinks {
 // Rotating file sink based on size
 //
 template<typename Mutex>
-class rotating_file_sink SPDLOG_FINAL : public base_sink<Mutex>
+class rotating_file_sink final : public base_sink<Mutex>
 {
 public:
     rotating_file_sink(filename_t base_filename, std::size_t max_size, std::size_t max_files)
@@ -86,24 +86,21 @@ private:
         for (auto i = max_files_; i > 0; --i)
         {
             filename_t src = calc_filename(base_filename_, i - 1);
+            if (!details::file_helper::file_exists(src))
+            {
+                continue;
+            }
             filename_t target = calc_filename(base_filename_, i);
 
-            if (details::file_helper::file_exists(target))
+            if (!rename_file(src, target))
             {
-                if (details::os::remove(target) != 0)
-                {
-                    throw spdlog_ex("rotating_file_sink: failed removing " + filename_to_str(target), errno);
-                }
-            }
-            if (details::file_helper::file_exists(src) && details::os::rename(src, target) != 0)
-            {
-                // if failed try again after small delay.
+                // if failed try again after a small delay.
                 // this is a workaround to a windows issue, where very high rotation
-                // rates sometimes fail (because of antivirus?).
-                details::os::sleep_for_millis(20);
-                details::os::remove(target);
-                if (details::os::rename(src, target) != 0)
+                // rates can cause the rename to fail with permission denied (because of antivirus?).
+                details::os::sleep_for_millis(100);
+                if (!rename_file(src, target))
                 {
+                    file_helper_.reopen(true); // truncate the log file anyway to prevent it to grow beyond its limit!
                     throw spdlog_ex(
                         "rotating_file_sink: failed renaming " + filename_to_str(src) + " to " + filename_to_str(target), errno);
                 }
@@ -112,6 +109,15 @@ private:
         file_helper_.reopen(true);
     }
 
+    // delete the target if exists, and rename the src file  to target
+    // return true on success, false otherwise.
+    bool rename_file(const filename_t &src_filename, const filename_t &target_filename)
+    {
+        // try to delete the target file in case it already exists.
+        (void)details::os::remove(target_filename);
+        return details::os::rename(src_filename, target_filename) == 0;
+    }
+
     filename_t base_filename_;
     std::size_t max_size_;
     std::size_t max_files_;

include/spdlog/sinks/sink.h

@@ -20,9 +20,11 @@ public:
     {
     }
 
-    sink(std::unique_ptr<spdlog::pattern_formatter> formatter)
+    explicit sink(std::unique_ptr<spdlog::pattern_formatter> formatter)
         : level_(level::trace)
-        , formatter_(std::move(formatter)){};
+        , formatter_(std::move(formatter))
+    {
+    }
 
     virtual ~sink() = default;
     virtual void log(const details::log_msg &msg) = 0;

include/spdlog/sinks/stdout_sinks.h

@@ -12,14 +12,13 @@
 #include <cstdio>
 #include <memory>
 #include <mutex>
-#include <spdlog/details/console_globals.h>
 
 namespace spdlog {
 
 namespace sinks {
 
 template<typename TargetStream, typename ConsoleMutex>
-class stdout_sink : public sink
+class stdout_sink final : public sink
 {
 public:
     using mutex_t = typename ConsoleMutex::mutex_t;
@@ -28,7 +27,7 @@ public:
         , file_(TargetStream::stream())
     {
     }
-    ~stdout_sink() = default;
+    ~stdout_sink() override = default;
 
     stdout_sink(const stdout_sink &other) = delete;
     stdout_sink &operator=(const stdout_sink &other) = delete;
@@ -48,13 +47,13 @@ public:
         fflush(file_);
     }
 
-    void set_pattern(const std::string &pattern) override SPDLOG_FINAL
+    void set_pattern(const std::string &pattern) override
     {
         std::lock_guard<mutex_t> lock(mutex_);
         formatter_ = std::unique_ptr<spdlog::formatter>(new pattern_formatter(pattern));
     }
 
-    void set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter) override SPDLOG_FINAL
+    void set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter) override
     {
         std::lock_guard<mutex_t> lock(mutex_);
         formatter_ = std::move(sink_formatter);

include/spdlog/sinks/syslog_sink.h

@@ -24,8 +24,8 @@ class syslog_sink : public base_sink<Mutex>
 {
 public:
     //
-    syslog_sink(const std::string &ident = "", int syslog_option = 0, int syslog_facility = LOG_USER)
-        : ident_(ident)
+    explicit syslog_sink(std::string ident = "", int syslog_option = 0, int syslog_facility = LOG_USER)
+        : ident_(std::move(ident))
     {
         priorities_[static_cast<size_t>(level::trace)] = LOG_DEBUG;
         priorities_[static_cast<size_t>(level::debug)] = LOG_DEBUG;

include/spdlog/sinks/wincolor_sink.h

@@ -61,7 +61,7 @@ public:
         colors_[level] = color;
     }
 
-    void log(const details::log_msg &msg) SPDLOG_FINAL override
+    void log(const details::log_msg &msg) final override
     {
         std::lock_guard<mutex_t> lock(mutex_);
         fmt::memory_buffer formatted;
@@ -85,18 +85,18 @@ public:
         }
     }
 
-    void flush() SPDLOG_FINAL override
+    void flush() final override
     {
         // windows console always flushed?
     }
 
-    void set_pattern(const std::string &pattern) override SPDLOG_FINAL
+    void set_pattern(const std::string &pattern) override final
     {
         std::lock_guard<mutex_t> lock(mutex_);
         formatter_ = std::unique_ptr<spdlog::formatter>(new pattern_formatter(pattern));
     }
 
-    void set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter) override SPDLOG_FINAL
+    void set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter) override final
     {
         std::lock_guard<mutex_t> lock(mutex_);
         formatter_ = std::move(sink_formatter);

include/spdlog/spdlog.h

@@ -64,7 +64,7 @@ inline void set_formatter(std::unique_ptr<spdlog::formatter> formatter)
 // example: spdlog::set_pattern("%Y-%m-%d %H:%M:%S.%e %l : %v");
 inline void set_pattern(std::string pattern, pattern_time_type time_type = pattern_time_type::local)
 {
-    set_formatter(std::unique_ptr<spdlog::formatter>(new pattern_formatter(pattern, time_type)));
+    set_formatter(std::unique_ptr<spdlog::formatter>(new pattern_formatter(std::move(pattern), time_type)));
 }
 
 // Set global logging level
@@ -101,9 +101,9 @@ inline void register_logger(std::shared_ptr<logger> logger)
 // Apply a user defined function on all registered loggers
 // Example:
 // spdlog::apply_all([&](std::shared_ptr<spdlog::logger> l) {l->flush();});
-inline void apply_all(std::function<void(std::shared_ptr<logger>)> fun)
+inline void apply_all(const std::function<void(std::shared_ptr<logger>)> &fun)
 {
-    details::registry::instance().apply_all(std::move(fun));
+    details::registry::instance().apply_all(fun);
 }
 
 // Drop the reference to the given logger

include/spdlog/tweakme.h

@@ -108,15 +108,6 @@
 // #define SPDLOG_PREVENT_CHILD_FD
 ///////////////////////////////////////////////////////////////////////////////
 
-///////////////////////////////////////////////////////////////////////////////
-// Uncomment if your compiler doesn't support the "final" keyword.
-// The final keyword allows more optimizations in release
-// mode with recent compilers. See GCC's documentation for -Wsuggest-final-types
-// for instance.
-//
-// #define SPDLOG_NO_FINAL
-///////////////////////////////////////////////////////////////////////////////
-
 ///////////////////////////////////////////////////////////////////////////////
 // Uncomment to enable message counting feature.
 // Use the %i in the logger pattern to display log message sequence id.

include/spdlog/version.h

@@ -6,7 +6,7 @@
 #pragma once
 
 #define SPDLOG_VER_MAJOR 1
-#define SPDLOG_VER_MINOR 0
+#define SPDLOG_VER_MINOR 2
 #define SPDLOG_VER_PATCH 0
 
 #define SPDLOG_VERSION (SPDLOG_VER_MAJOR * 10000 + SPDLOG_VER_MINOR * 100 + SPDLOG_VER_PATCH)

tests/CMakeLists.txt

@@ -1,5 +1,5 @@
 project(spdlog-utests CXX)
-enable_testing()
+
 find_package(Threads REQUIRED)
 
 set(SPDLOG_UTESTS_SOURCES
@@ -7,18 +7,23 @@ set(SPDLOG_UTESTS_SOURCES
     file_helper.cpp
     file_log.cpp
     test_misc.cpp
-	test_pattern_formatter.cpp
+    test_pattern_formatter.cpp
     test_async.cpp
     includes.h
     registry.cpp
     test_macros.cpp
     utils.cpp
     utils.h
-    main.cpp)
+    main.cpp
+    test_mpmc_q.cpp
+    test_sink.h
+    test_fmt_helper.cpp)
 
 add_executable(${PROJECT_NAME} ${SPDLOG_UTESTS_SOURCES})
 target_link_libraries(${PROJECT_NAME} PRIVATE Threads::Threads)
-target_link_libraries(${PROJECT_NAME} PRIVATE spdlog)
+target_link_libraries(${PROJECT_NAME} PRIVATE spdlog::spdlog)
 
-add_test(NAME ${PROJECT_NAME} COMMAND ${PROJECT_NAME})
 file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")
+
+enable_testing()
+add_test(NAME ${PROJECT_NAME} COMMAND ${PROJECT_NAME})

tests/Makefile

@@ -1,5 +1,5 @@
 CXX	?= g++
-CXXFLAGS	=  -Wall  -pedantic -std=c++11 -pthread -O3 -I../include -fmax-errors=1
+CXXFLAGS	=  -Wall  -pedantic -std=c++11 -pthread -Wconversion -O3 -I../include -fmax-errors=1
 LDPFALGS = -pthread
 
 CPP_FILES := $(wildcard *.cpp)

tests/errors.cpp

@@ -9,15 +9,15 @@ class failing_sink : public spdlog::sinks::base_sink<std::mutex>
 {
 public:
     failing_sink() = default;
-    ~failing_sink() = default;
+    ~failing_sink() final = default;
 
 protected:
-    void sink_it_(const spdlog::details::log_msg &) override
+    void sink_it_(const spdlog::details::log_msg &) final
     {
         throw std::runtime_error("some error happened during log");
     }
 
-    void flush_() override
+    void flush_() final
     {
         throw std::runtime_error("some error happened during flush");
     }
@@ -25,7 +25,6 @@ protected:
 
 TEST_CASE("default_error_handler", "[errors]]")
 {
-
     prepare_logdir();
     std::string filename = "logs/simple_log.txt";
 
@@ -84,7 +83,9 @@ TEST_CASE("async_error_handler", "[errors]]")
         logger->set_error_handler([=](const std::string &) {
             std::ofstream ofs("logs/custom_err.txt");
             if (!ofs)
+            {
                 throw std::runtime_error("Failed open logs/custom_err.txt");
+            }
             ofs << err_msg;
         });
         logger->info("Good message #1");

tests/file_log.cpp

@@ -33,7 +33,7 @@ TEST_CASE("flush_on", "[flush_on]]")
 
     logger->info("Test message {}", 1);
     logger->info("Test message {}", 2);
-    logger->flush();
+
     REQUIRE(file_contents(filename) == std::string("Should not be flushed\nTest message 1\nTest message 2\n"));
     REQUIRE(count_lines(filename) == 3);
 }
@@ -62,7 +62,9 @@ TEST_CASE("rotating_file_logger2", "[rotating_logger]]")
     std::string basename = "logs/rotating_log";
     auto logger = spdlog::rotating_logger_mt("logger", basename, max_size, 1);
     for (int i = 0; i < 10; ++i)
+    {
         logger->info("Test message {}", i);
+    }
 
     logger->flush();
     auto filename = basename;

tests/includes.h

@@ -6,11 +6,13 @@
 #include <cstdio>
 #include <exception>
 #include <fstream>
+#include <iostream>
 #include <ostream>
 #include <string>
 
 #define SPDLOG_TRACE_ON
 #define SPDLOG_DEBUG_ON
+#define SPDLOG_ENABLE_MESSAGE_COUNTER
 
 #include "spdlog/async.h"
 #include "spdlog/sinks/basic_file_sink.h"

tests/install_libcxx.sh

@@ -1,12 +0,0 @@
-#!/bin/bash
-#
-# Install libc++ under travis
-
-svn --quiet co http://llvm.org/svn/llvm-project/libcxx/trunk libcxx
-mkdir libcxx/build
-(cd libcxx/build && cmake .. -DLIBCXX_CXX_ABI=libstdc++ -DLIBCXX_CXX_ABI_INCLUDE_PATHS="/usr/include/c++/4.6;/usr/include/c++/4.6/x86_64-linux-gnu")
-make -C libcxx/build cxx -j2
-sudo cp libcxx/build/lib/libc++.so.1.0 /usr/lib/
-sudo cp -r libcxx/build/include/c++/v1 /usr/include/c++/v1/
-sudo ln -sf /usr/lib/libc++.so.1.0 /usr/lib/libc++.so
-sudo ln -sf /usr/lib/libc++.so.1.0 /usr/lib/libc++.so.1

tests/registry.cpp

@@ -9,7 +9,7 @@ TEST_CASE("register_drop", "[registry]")
     spdlog::create<spdlog::sinks::null_sink_mt>(tested_logger_name);
     REQUIRE(spdlog::get(tested_logger_name) != nullptr);
     // Throw if registring existing name
-    REQUIRE_THROWS_AS(spdlog::create<spdlog::sinks::null_sink_mt>(tested_logger_name), spdlog::spdlog_ex);
+    REQUIRE_THROWS_AS(spdlog::create<spdlog::sinks::null_sink_mt>(tested_logger_name), const spdlog::spdlog_ex &);
 }
 
 TEST_CASE("explicit register"
@@ -20,7 +20,7 @@ TEST_CASE("explicit register"
     spdlog::register_logger(logger);
     REQUIRE(spdlog::get(tested_logger_name) != nullptr);
     // Throw if registring existing name
-    REQUIRE_THROWS_AS(spdlog::create<spdlog::sinks::null_sink_mt>(tested_logger_name), spdlog::spdlog_ex);
+    REQUIRE_THROWS_AS(spdlog::create<spdlog::sinks::null_sink_mt>(tested_logger_name), const spdlog::spdlog_ex &);
 }
 
 TEST_CASE("apply_all"
@@ -33,7 +33,7 @@ TEST_CASE("apply_all"
     spdlog::register_logger(logger2);
 
     int counter = 0;
-    spdlog::apply_all([&counter](std::shared_ptr<spdlog::logger> l) { counter++; });
+    spdlog::apply_all([&counter](std::shared_ptr<spdlog::logger>) { counter++; });
     REQUIRE(counter == 2);
 
     counter = 0;
@@ -62,7 +62,7 @@ TEST_CASE("drop_all"
     spdlog::create<spdlog::sinks::null_sink_mt>(tested_logger_name2);
     spdlog::drop_all();
     REQUIRE_FALSE(spdlog::get(tested_logger_name));
-    REQUIRE_FALSE(spdlog::get(tested_logger_name));
+    REQUIRE_FALSE(spdlog::get(tested_logger_name2));
 }
 
 TEST_CASE("drop non existing"

tests/test_async.cpp

@@ -7,6 +7,7 @@ TEST_CASE("basic async test ", "[async]")
 {
     using namespace spdlog;
     auto test_sink = std::make_shared<sinks::test_sink_mt>();
+    size_t overrun_counter = 0;
     size_t queue_size = 128;
     size_t messages = 256;
     {
@@ -17,17 +18,20 @@ TEST_CASE("basic async test ", "[async]")
             logger->info("Hello message #{}", i);
         }
         logger->flush();
+        overrun_counter = tp->overrun_counter();
     }
     REQUIRE(test_sink->msg_counter() == messages);
     REQUIRE(test_sink->flush_counter() == 1);
+    REQUIRE(overrun_counter == 0);
 }
 
 TEST_CASE("discard policy ", "[async]")
 {
     using namespace spdlog;
     auto test_sink = std::make_shared<sinks::test_sink_mt>();
-    size_t queue_size = 2;
-    size_t messages = 10240;
+    test_sink->set_delay(std::chrono::milliseconds(1));
+    size_t queue_size = 4;
+    size_t messages = 1024;
 
     auto tp = std::make_shared<details::thread_pool>(queue_size, 1);
     auto logger = std::make_shared<async_logger>("as", test_sink, tp, async_overflow_policy::overrun_oldest);
@@ -36,22 +40,26 @@ TEST_CASE("discard policy ", "[async]")
         logger->info("Hello message");
     }
     REQUIRE(test_sink->msg_counter() < messages);
+    REQUIRE(tp->overrun_counter() > 0);
 }
 
 TEST_CASE("discard policy using factory ", "[async]")
 {
     using namespace spdlog;
-    size_t queue_size = 2;
-    size_t messages = 10240;
+    size_t queue_size = 4;
+    size_t messages = 1024;
     spdlog::init_thread_pool(queue_size, 1);
 
     auto logger = spdlog::create_async_nb<sinks::test_sink_mt>("as2");
+    auto test_sink = std::static_pointer_cast<sinks::test_sink_mt>(logger->sinks()[0]);
+    test_sink->set_delay(std::chrono::milliseconds(1));
+
     for (size_t i = 0; i < messages; i++)
     {
         logger->info("Hello message");
     }
-    auto sink = std::static_pointer_cast<sinks::test_sink_mt>(logger->sinks()[0]);
-    REQUIRE(sink->msg_counter() < messages);
+
+    REQUIRE(test_sink->msg_counter() < messages);
     spdlog::drop_all();
 }
 

tests/test_fmt_helper.cpp

@@ -0,0 +1,54 @@
+
+#include "includes.h"
+
+void test_pad2(int n, const char *expected)
+{
+    fmt::memory_buffer buf;
+    spdlog::details::fmt_helper::pad2(n, buf);
+    REQUIRE(fmt::to_string(buf) == expected);
+}
+
+void test_pad3(int n, const char *expected)
+{
+    fmt::memory_buffer buf;
+    spdlog::details::fmt_helper::pad3(n, buf);
+    REQUIRE(fmt::to_string(buf) == expected);
+}
+
+void test_pad6(std::size_t n, const char *expected)
+{
+    fmt::memory_buffer buf;
+    spdlog::details::fmt_helper::pad6(n, buf);
+    REQUIRE(fmt::to_string(buf) == expected);
+}
+
+TEST_CASE("pad2", "[fmt_helper]")
+{
+    test_pad2(0, "00");
+    test_pad2(3, "03");
+    test_pad2(23, "23");
+    test_pad2(123, "123");
+    test_pad2(1234, "1234");
+    test_pad2(-5, "-5");
+}
+
+TEST_CASE("pad3", "[fmt_helper]")
+{
+    test_pad3(0, "000");
+    test_pad3(3, "003");
+    test_pad3(23, "023");
+    test_pad3(123, "123");
+    test_pad3(1234, "1234");
+    test_pad3(-5, "-05");
+}
+
+TEST_CASE("pad6", "[fmt_helper]")
+{
+    test_pad6(0, "000000");
+    test_pad6(3, "000003");
+    test_pad6(23, "000023");
+    test_pad6(123, "000123");
+    test_pad6(1234, "001234");
+    test_pad6(12345, "012345");
+    test_pad6(123456, "123456");
+}

tests/test_misc.cpp

@@ -91,3 +91,103 @@ TEST_CASE("periodic flush", "[periodic_flush]")
     spdlog::flush_every(std::chrono::seconds(0));
     spdlog::drop_all();
 }
+
+TEST_CASE("clone", "[clone]")
+{
+    using namespace spdlog;
+
+    auto logger = spdlog::create<sinks::test_sink_mt>("orig");
+    auto cloned = logger->clone("clone");
+
+    REQUIRE(cloned->name() == "clone");
+    REQUIRE(logger->sinks() == cloned->sinks());
+    REQUIRE(logger->level() == cloned->level());
+    REQUIRE(logger->flush_level() == cloned->flush_level());
+    logger->info("Some message 1");
+    cloned->info("Some message 2");
+
+    auto test_sink = std::static_pointer_cast<sinks::test_sink_mt>(cloned->sinks()[0]);
+    REQUIRE(test_sink->msg_counter() == 2);
+
+    spdlog::drop_all();
+}
+
+TEST_CASE("clone async", "[clone]")
+{
+    using namespace spdlog;
+
+    auto logger = spdlog::create_async<sinks::test_sink_mt>("orig");
+    auto cloned = logger->clone("clone");
+
+    REQUIRE(cloned->name() == "clone");
+    REQUIRE(logger->sinks() == cloned->sinks());
+    REQUIRE(logger->level() == cloned->level());
+    REQUIRE(logger->flush_level() == cloned->flush_level());
+
+    logger->info("Some message 1");
+    cloned->info("Some message 2");
+
+    spdlog::details::os::sleep_for_millis(10);
+
+    auto test_sink = std::static_pointer_cast<sinks::test_sink_mt>(cloned->sinks()[0]);
+    REQUIRE(test_sink->msg_counter() == 2);
+
+    spdlog::drop_all();
+}
+
+#include "spdlog/fmt/bin_to_hex.h"
+
+TEST_CASE("to_hex", "[to_hex]")
+{
+    std::ostringstream oss;
+    auto oss_sink = std::make_shared<spdlog::sinks::ostream_sink_mt>(oss);
+    spdlog::logger oss_logger("oss", oss_sink);
+
+    std::vector<unsigned char> v{9, 0xa, 0xb, 0xc, 0xff, 0xff};
+    oss_logger.info("{}", spdlog::to_hex(v));
+
+    auto output = oss.str();
+    REQUIRE(ends_with(output, "0000: 09 0a 0b 0c ff ff" + std::string(spdlog::details::os::default_eol)));
+}
+
+TEST_CASE("to_hex_upper", "[to_hex]")
+{
+    std::ostringstream oss;
+    auto oss_sink = std::make_shared<spdlog::sinks::ostream_sink_mt>(oss);
+    spdlog::logger oss_logger("oss", oss_sink);
+
+    std::vector<unsigned char> v{9, 0xa, 0xb, 0xc, 0xff, 0xff};
+    oss_logger.info("{:X}", spdlog::to_hex(v));
+
+    auto output = oss.str();
+    REQUIRE(ends_with(output, "0000: 09 0A 0B 0C FF FF" + std::string(spdlog::details::os::default_eol)));
+}
+
+TEST_CASE("to_hex_no_delimiter", "[to_hex]")
+{
+    std::ostringstream oss;
+    auto oss_sink = std::make_shared<spdlog::sinks::ostream_sink_mt>(oss);
+    spdlog::logger oss_logger("oss", oss_sink);
+
+    std::vector<unsigned char> v{9, 0xa, 0xb, 0xc, 0xff, 0xff};
+    oss_logger.info("{:sX}", spdlog::to_hex(v));
+
+    auto output = oss.str();
+    REQUIRE(ends_with(output, "0000: 090A0B0CFFFF" + std::string(spdlog::details::os::default_eol)));
+}
+
+TEST_CASE("message_counter", "[message_counter]")
+{
+    std::ostringstream oss;
+    auto oss_sink = std::make_shared<spdlog::sinks::ostream_sink_mt>(oss);
+    spdlog::logger oss_logger("oss", oss_sink);
+    oss_logger.set_pattern("%i %v");
+
+    oss_logger.info("Hello");
+    REQUIRE(oss.str() == "000001 Hello" + std::string(spdlog::details::os::default_eol));
+
+    oss.str("");
+    oss_logger.info("Hello again");
+
+    REQUIRE(oss.str() == "000002 Hello again" + std::string(spdlog::details::os::default_eol));
+}

tests/test_mpmc_q.cpp

@@ -0,0 +1,107 @@
+#include "includes.h"
+
+using namespace std::chrono;
+using std::chrono::milliseconds;
+using test_clock = std::chrono::high_resolution_clock;
+
+static milliseconds millis_from(const test_clock::time_point &tp0)
+{
+    return std::chrono::duration_cast<milliseconds>(test_clock::now() - tp0);
+}
+TEST_CASE("dequeue-empty-nowait", "[mpmc_blocking_q]")
+{
+    size_t q_size = 100;
+    milliseconds tolerance_wait(10);
+    spdlog::details::mpmc_blocking_queue<int> q(q_size);
+    int popped_item;
+
+    auto start = test_clock::now();
+    auto rv = q.dequeue_for(popped_item, milliseconds::zero());
+    auto delta_ms = millis_from(start);
+
+    REQUIRE(rv == false);
+    INFO("Delta " << delta_ms.count() << " millis");
+    REQUIRE(delta_ms <= tolerance_wait);
+}
+
+TEST_CASE("dequeue-empty-wait", "[mpmc_blocking_q]")
+{
+
+    size_t q_size = 100;
+    milliseconds wait_ms(250);
+    milliseconds tolerance_wait(50);
+
+    spdlog::details::mpmc_blocking_queue<int> q(q_size);
+    int popped_item;
+    auto start = test_clock::now();
+    auto rv = q.dequeue_for(popped_item, wait_ms);
+    auto delta_ms = millis_from(start);
+
+    REQUIRE(rv == false);
+
+    INFO("Delta " << delta_ms.count() << " millis");
+    REQUIRE(delta_ms >= wait_ms - tolerance_wait);
+    REQUIRE(delta_ms <= wait_ms + tolerance_wait);
+}
+
+TEST_CASE("enqueue_nowait", "[mpmc_blocking_q]")
+{
+
+    size_t q_size = 1;
+    spdlog::details::mpmc_blocking_queue<int> q(q_size);
+    milliseconds tolerance_wait(10);
+
+    q.enqueue(1);
+    REQUIRE(q.overrun_counter() == 0);
+
+    auto start = test_clock::now();
+    q.enqueue_nowait(2);
+    auto delta_ms = millis_from(start);
+
+    INFO("Delta " << delta_ms.count() << " millis");
+    REQUIRE(delta_ms <= tolerance_wait);
+    REQUIRE(q.overrun_counter() == 1);
+}
+
+TEST_CASE("bad_queue", "[mpmc_blocking_q]")
+{
+    size_t q_size = 0;
+    spdlog::details::mpmc_blocking_queue<int> q(q_size);
+    q.enqueue_nowait(1);
+    REQUIRE(q.overrun_counter() == 1);
+    int i;
+    REQUIRE(q.dequeue_for(i, milliseconds(0)) == false);
+}
+
+TEST_CASE("empty_queue", "[mpmc_blocking_q]")
+{
+    size_t q_size = 10;
+    spdlog::details::mpmc_blocking_queue<int> q(q_size);
+    int i;
+    REQUIRE(q.dequeue_for(i, milliseconds(10)) == false);
+}
+
+TEST_CASE("full_queue", "[mpmc_blocking_q]")
+{
+    size_t q_size = 100;
+    spdlog::details::mpmc_blocking_queue<int> q(q_size);
+    for (int i = 0; i < static_cast<int>(q_size); i++)
+    {
+        q.enqueue(std::move(i));
+    }
+
+    q.enqueue_nowait(123456);
+    REQUIRE(q.overrun_counter() == 1);
+
+    for (int i = 1; i < static_cast<int>(q_size); i++)
+    {
+        int item = -1;
+        q.dequeue_for(item, milliseconds(0));
+        REQUIRE(item == i);
+    }
+
+    // last item pushed has overridden the oldest.
+    int item = -1;
+    q.dequeue_for(item, milliseconds(0));
+    REQUIRE(item == 123456);
+}

tests/test_pattern_formatter.cpp

@@ -20,9 +20,6 @@ TEST_CASE("custom eol", "[pattern_formatter]")
 {
     std::string msg = "Hello custom eol test";
     std::string eol = ";)";
-    // auto formatter = std::make_shared<spdlog::pattern_formatter>("%v", spdlog::pattern_time_type::local, ";)");
-    std::unique_ptr<spdlog::formatter>(new spdlog::pattern_formatter("%v", spdlog::pattern_time_type::local, ";)"));
-
     REQUIRE(log_to_str(msg, "%v", spdlog::pattern_time_type::local, ";)") == msg + eol);
 }
 

tests/test_sink.h

@@ -21,11 +21,13 @@ class test_sink : public base_sink<Mutex>
 public:
     size_t msg_counter()
     {
+        std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
         return msg_counter_;
     }
 
     size_t flush_counter()
     {
+        std::lock_guard<Mutex> lock(base_sink<Mutex>::mutex_);
         return flush_counter_;
     }
 

tests/tests.sln

@@ -56,7 +56,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "sinks", "sinks", "{093AE34A
 		..\include\spdlog\sinks\ansicolor_sink.h = ..\include\spdlog\sinks\ansicolor_sink.h
 		..\include\spdlog\sinks\base_sink.h = ..\include\spdlog\sinks\base_sink.h
 		..\include\spdlog\sinks\dist_sink.h = ..\include\spdlog\sinks\dist_sink.h
-		..\include\spdlog\sinks\file_sinks.h = ..\include\spdlog\sinks\file_sinks.h
 		..\include\spdlog\sinks\msvc_sink.h = ..\include\spdlog\sinks\msvc_sink.h
 		..\include\spdlog\sinks\null_sink.h = ..\include\spdlog\sinks\null_sink.h
 		..\include\spdlog\sinks\ostream_sink.h = ..\include\spdlog\sinks\ostream_sink.h
@@ -65,7 +64,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "sinks", "sinks", "{093AE34A
 		..\include\spdlog\sinks\stdout_sinks.h = ..\include\spdlog\sinks\stdout_sinks.h
 		..\include\spdlog\sinks\syslog_sink.h = ..\include\spdlog\sinks\syslog_sink.h
 		..\include\spdlog\sinks\wincolor_sink.h = ..\include\spdlog\sinks\wincolor_sink.h
-		..\include\spdlog\sinks\windebug_sink.h = ..\include\spdlog\sinks\windebug_sink.h
 	EndProjectSection
 EndProject
 Global

tests/utils.cpp

@@ -8,8 +8,15 @@ void prepare_logdir()
     system("del /F /Q logs\\*");
 #else
     auto rv = system("mkdir -p logs");
+    if (rv != 0)
+    {
+        throw std::runtime_error("Failed to mkdir -p logs");
+    }
     rv = system("rm -f logs/*");
-    (void)rv;
+    if (rv != 0)
+    {
+        throw std::runtime_error("Failed to rm -f logs/*");
+    }
 #endif
 }
 
@@ -17,7 +24,9 @@ std::string file_contents(const std::string &filename)
 {
     std::ifstream ifs(filename);
     if (!ifs)
+    {
         throw std::runtime_error("Failed open file ");
+    }
     return std::string((std::istreambuf_iterator<char>(ifs)), (std::istreambuf_iterator<char>()));
 }
 
@@ -25,7 +34,9 @@ std::size_t count_lines(const std::string &filename)
 {
     std::ifstream ifs(filename);
     if (!ifs)
+    {
         throw std::runtime_error("Failed open file ");
+    }
 
     std::string line;
     size_t counter = 0;
@@ -38,7 +49,9 @@ std::size_t get_filesize(const std::string &filename)
 {
     std::ifstream ifs(filename, std::ifstream::ate | std::ifstream::binary);
     if (!ifs)
+    {
         throw std::runtime_error("Failed open file ");
+    }
 
     return static_cast<std::size_t>(ifs.tellg());
 }
@@ -47,6 +60,8 @@ std::size_t get_filesize(const std::string &filename)
 bool ends_with(std::string const &value, std::string const &ending)
 {
     if (ending.size() > value.size())
+    {
         return false;
+    }
     return std::equal(ending.rbegin(), ending.rend(), value.rbegin());
 }