DEPRECATED: operator<< API

README.md

@@ -68,8 +68,7 @@ int main(int, char* [])
         // console logger (multithreaded and with color)
         auto console = spd::stdout_logger_mt("console", true);
         console->info("Welcome to spdlog!") ;
-        console->info("An info message example {}..", 1);
-        console->info() << "Streams are supported too  " << 1;
+        console->info("An info message example {}..", 1);        
 
         //Formatting examples
         console->info("Easy padding in numbers like {:08d}", 12);
@@ -129,7 +128,7 @@ int main(int, char* [])
         size_t q_size = 8192; //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!";
+        async_file->info("This is async log..Should be very fast!");
 
         //
         // syslog example. linux only..
@@ -148,16 +147,6 @@ int main(int, char* [])
 }
 
 
-// Example of user defined class with operator<<
-class some_class {};
-std::ostream& operator<<(std::ostream& os, const some_class& c) { return os << "some_class"; }
-
-void custom_class_example()
-{
-    some_class c;
-    spdlog::get("console")->info("custom class with operator<<: {}..", c);
-    spdlog::get("console")->info() << "custom class with operator<<: " << c << "..";
-}
 ```
 
 ## Documentation

bench/spdlog-async.cpp

@@ -41,7 +41,7 @@ int main(int argc, char* argv[])
             {
                 int counter = ++msg_counter;
                 if (counter > howmany) break;
-                logger->info() << "spdlog message #" << counter << ": This is some text for your pleasure";
+                logger->info("spdlog message #{}: This is some text for your pleasure", counter);
             }
         }));
     }

bench/spdlog-bench-mt.cpp

@@ -38,7 +38,7 @@ int main(int argc, char* argv[])
             {
                 int counter = ++msg_counter;
                 if (counter > howmany) break;
-                logger->info() << "spdlog message #" << counter << ": This is some text for your pleasure";
+                logger->info("spdlog message #{}: This is some text for your pleasure", counter);
             }
         }));
     }

bench/spdlog-bench.cpp

@@ -15,6 +15,6 @@ int main(int, char* [])
 
     logger->set_pattern("[%Y-%b-%d %T.%e]: %v");
     for(int i  = 0 ; i < howmany; ++i)
-        logger->info() << "spdlog message #" << i << ": This is some text for your pleasure";
+        logger->info("spdlog message #{} : This is some text for your pleasure", i);
     return 0;
 }

example/example.cpp

@@ -23,7 +23,6 @@ int main(int, char*[])
         auto console = spd::stdout_logger_mt("console", true);
         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);
@@ -55,6 +54,7 @@ int main(int, char*[])
 
         // Create a daily logger - a new file is created every day on 2:30am
         auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily", 2, 30);
+        daily_logger->info(123.44);
 
         // Customize msg format for all messages
         spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
@@ -107,17 +107,3 @@ void syslog_example()
 }
 
 
-// Example of user defined class with operator<<
-class some_class {};
-std::ostream& operator<<(std::ostream& os, const some_class&)
-{
-    return os << "some_class";
-}
-
-void custom_class_example()
-{
-    some_class c;
-    spdlog::get("console")->info("custom class with operator<<: {}..", c);
-    spdlog::get("console")->info() << "custom class with operator<<: " << c << "..";
-}
-

include/spdlog/common.h

@@ -27,6 +27,14 @@
 #define SPDLOG_CONSTEXPR constexpr
 #endif
 
+#if defined(__GNUC__)  || defined(__clang__)
+#define DEPRECATED __attribute__((deprecated))
+#elif defined(_MSC_VER)
+#define DEPRECATED __declspec(deprecated)
+#else
+#pragma message("DEPRECATED")
+#define DEPRECATED
+#endif
 
 namespace spdlog
 {

include/spdlog/details/line_logger_fwd.h

@@ -49,21 +49,21 @@ public:
     //
     // Support for operator<<
     //
-    line_logger& operator<<(const char* what);
-    line_logger& operator<<(const std::string& what);
-    line_logger& operator<<(int what);
-    line_logger& operator<<(unsigned int what);
-    line_logger& operator<<(long what);
-    line_logger& operator<<(unsigned long what);
-    line_logger& operator<<(long long what);
-    line_logger& operator<<(unsigned long long what);
-    line_logger& operator<<(double what);
-    line_logger& operator<<(long double what);
-    line_logger& operator<<(float what);
-    line_logger& operator<<(char what);
+    DEPRECATED line_logger& operator<<(const char* what);
+    DEPRECATED line_logger& operator<<(const std::string& what);
+    DEPRECATED line_logger& operator<<(int what);
+    DEPRECATED line_logger& operator<<(unsigned int what);
+    DEPRECATED line_logger& operator<<(long what);
+    DEPRECATED line_logger& operator<<(unsigned long what);
+    DEPRECATED line_logger& operator<<(long long what);
+    DEPRECATED line_logger& operator<<(unsigned long long what);
+    DEPRECATED line_logger& operator<<(double what);
+    DEPRECATED line_logger& operator<<(long double what);
+    DEPRECATED line_logger& operator<<(float what);
+    DEPRECATED line_logger& operator<<(char what);
     //Support user types which implements operator<<
     template<typename T>
-    line_logger& operator<<(const T& what);
+    DEPRECATED line_logger& operator<<(const T& what);
 
     void disable();
     bool is_enabled() const;

include/spdlog/details/logger_impl.h

@@ -74,7 +74,7 @@ inline spdlog::details::line_logger spdlog::logger::_log_if_enabled(level::level
 {
     bool msg_enabled = should_log(lvl);
     details::line_logger l(this, lvl, msg_enabled);
-    l << msg;
+    l.write("{}", msg);
     return l;
 }
 

tests/format.cpp

@@ -11,7 +11,7 @@ std::string log_info(const T& what, spdlog::level::level_enum logger_level = spd
     spdlog::logger oss_logger("oss", oss_sink);
     oss_logger.set_level(logger_level);
     oss_logger.set_pattern("%v");
-    oss_logger.info() << what;
+    oss_logger.info(what);
 
     return oss.str().substr(0, oss.str().length() - spdlog::details::os::eol_size);
 }
@@ -21,19 +21,6 @@ std::string log_info(const T& what, spdlog::level::level_enum logger_level = spd
 
 
 
-//User defined class with operator<<
-struct some_logged_class
-{
-    some_logged_class(const std::string val) :value(val) {};
-    std::string value;
-};
-std::ostream& operator<<(std::ostream& os, const some_logged_class& c)
-{
-    return os << c.value;
-}
-
-
-
 TEST_CASE("basic_logging ", "[basic_logging]")
 {
     //const char
@@ -49,7 +36,7 @@ TEST_CASE("basic_logging ", "[basic_logging]")
     REQUIRE(log_info(5.6) == "5.6");
 
     //User defined class
-    REQUIRE(log_info(some_logged_class("some_val")) == "some_val");
+    //REQUIRE(log_info(some_logged_class("some_val")) == "some_val");
 }
 
 

tests/tests.vcxproj

@@ -26,7 +26,7 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
@@ -38,7 +38,7 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset>v120</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>