Update README.md

README.md

@@ -67,15 +67,13 @@ int main(int, char* [])
     namespace spd = spdlog;
     try
     {
-        // Set log level to all loggers to debug and above
-        spd::set_level(spd::level::debug);
-
         //Create console, multithreaded logger
         auto console = spd::stdout_logger_mt("console");
         console->info("Welcome to spdlog!") ;
         console->info("An info message example {}..", 1);
         console->info() << "Streams are supported too  " << 1;
 	
+	//Formatting examples
         console->info("Easy padding in numbers like {:08d}", 12);
         console->info("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
         console->info("Support for floats {:03.2f}", 1.23456);
@@ -85,29 +83,48 @@ int main(int, char* [])
         console->info("{:>30}", "right aligned");
         console->info("{:^30}", "centered");
      
+     	//
+	// Runtime log levels
+	//
+        spd::set_level(spd::level::info); //Set global log level to info
+        console->debug("This message shold not be displayed!");
+        console->set_level(spd::level::info); // Set specific logger's log level
+        console->info("Now it should..");
+  
+  	//
         // Create a file rotating logger with 5mb size max and 3 rotated files
+        //
         auto file_logger = spd::rotating_logger_mt("file_logger", "logs/mylogfile", 1048576 * 5, 3);
-        file_logger->set_level(spd::level::info);
         for(int i = 0; i < 10; ++i)
 		      file_logger->info("{} * {} equals {:>10}", i, i, i*i);
 
+	// 
         // Customize msg format for all messages
+        //
         spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
         file_logger->info("This is another message with custom format");
 
         spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
 
+	//
+	// Compile time debug or trace macros.
+	// Enabled #ifdef SPDLOG_DEBUG_ON or #ifdef SPDLOG_TRACE_ON
+	//
         SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
         SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
         
+        //
         // Asynchronous logging is very fast..
         // Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
+        //
         size_t q_size = 1048576; //queue size must be power of 2
         spdlog::set_async_mode(q_size);
         auto async_file= spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
         async_file->info() << "This is async log.." << "Should be very fast!";
           
+        //      
         // syslog example. linux only..
+        //
         #ifdef __linux__
         std::string ident = "spdlog-example";
         auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);