C++

21.4    Information about the Source Code

Sometimes it is interesting for analysis purposes to know in which file and line the execution is currently taking place. For this, there are the __FILE__, __LINE__, and __func__ macros.

With C++20, this is now part of the standard library. With the <source_location> header, you can get the necessary information via source_location::current():

#include <source_location>#include <iostream>int main() {    const auto loc = std::source_location::current();    std::cout << "In " << loc.file_name() << " in line " << loc.line()        << " in function " << loc.function_name() << "\n";}  

This currently outputs the following for me:

In 11pModularisierung.md in line 687 in function int main()  

Normally, you will see a .cpp ...