Is There a __CLASS__ Macro for Class Name Extraction in C ?

The Search for __CLASS__: A Macro for Class Name Extraction

C provides the FUNCTION macro to retrieve the name of the currently executing function. Similarly, developers often wonder if there exists an equivalent macro for obtaining the class name, akin to __CLASS__.

The answer lies in exploring alternatives due to C language design. Here are some viable options:

1. typeid(*this).name(): This expression yields the fully qualified class name using the typeid operator and the this pointer.
2. PRETTY_FUNCTION: Available with gcc, this macro provides the full method or static function name, including class name.

3. Custom Macros: Developers can define custom macros to extract the desired information. For instance:

   • For method name extraction:

     #define __METHOD_NAME__ methodName(__PRETTY_FUNCTION__)
     
     inline std::string methodName(const std::string& prettyFunction) {
         // Extract the method name from __PRETTY_FUNCTION__
         ...
     }

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   • For class name extraction:

     #define __CLASS_NAME__ className(__PRETTY_FUNCTION__)
     
     inline std::string className(const std::string& prettyFunction) {
         // Extract the class name from __PRETTY_FUNCTION__
         ...
     }

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These custom macros emulate the functionality of CLASS but require careful consideration to handle special cases, such as methods or global functions without a class context.

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