Isn't __FUNCTION__ a string literal? I'd always thought it was - along the lines of __FILE__, but I just discovered I can't adjacently concatenate a string literal to it. If it's not a string literal, what is it defined as? I can't get cscope to resolve it.
E.g.
#include <iostream>
int main( int argc, char* argv[] )
{
std::cout << __FILE__ << std::endl;
std::cout << __FILE__ "A" << std::endl;
std::cout << __FUNCTION__ << std::endl;
//std::cout << __FUNCTION__ "A" << std::endl; // Doesn't compile.
return 0;
}
The error when the problem line is included:
>g++ --version
g++ (GCC) 4.8.3 20140911 (Red Hat 4.8.3-7)
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>g++ -g main.cpp
main.cpp: In function 'int main(int, char**)':
main.cpp:8:29: error: expected ';' before string constant
std::cout << __FUNCTION__ "A" << std::endl; // Doesn't compile.
Isn't
__FUNCTION__a string literal?
No.
From https://gcc.gnu.org/onlinedocs/gcc-7.2.0/gcc/Function-Names.html
These identifiers are variables, not preprocessor macros, and may not be used to initialize char arrays or be concatenated with string literals.