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https://github.com/gabime/spdlog.git
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no exceptions while logging
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@@ -7,13 +7,13 @@
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//
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#include "spdlog/spdlog.h"
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#include <cstdlib> // EXIT_FAILURE
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#include <iostream>
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#include <memory>
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void async_example();
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void syslog_example();
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void user_defined_example();
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void err_handler_example();
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namespace spd = spdlog;
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int main(int, char*[])
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@@ -61,12 +61,11 @@ int main(int, char*[])
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spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
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rotating_logger->info("This is another message with custom format");
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// Compile time debug or trace macros.
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// Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef SPDLOG_TRACE_ON
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SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
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SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
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// Asynchronous logging is very fast..
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// Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
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async_example();
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@@ -77,27 +76,29 @@ int main(int, char*[])
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// log user-defined types example..
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user_defined_example();
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// Change default log error handler
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err_handler_example();
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console->info("End of example. bye..");
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// Release and close all loggers
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spdlog::drop_all();
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}
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// Exceptions will only be thrown upon failed logger or sink construction (not during logging)
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catch (const spd::spdlog_ex& ex)
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{
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std::cout << "Log failed: " << ex.what() << std::endl;
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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std::cout << "Log init failed: " << ex.what() << std::endl;
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return 1;
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}
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}
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void async_example()
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{
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size_t q_size = 4096; //queue size must be power of 2
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spdlog::set_async_mode(q_size);
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auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
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for (int i = 0; i < 100; ++i)
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async_file->info("Async message #{}", i);
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async_file->info("Async message #{}{}", i);
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}
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//syslog example (linux/osx only)
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@@ -127,3 +128,15 @@ void user_defined_example()
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spd::get("console")->info("user defined type: {}", my_type { 14 });
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}
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//
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//custom error handler
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//
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void err_handler_example()
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{
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//can be set globaly or per logger(logger->set_error_handler(..))
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spdlog::set_error_handler([](const std::string& msg) {
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std::cerr << "my err handler: " << msg << std::endl;
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});
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spd::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
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}
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