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This replaces usages of the non-standard __FUNCTION__ macro with the standard mandated __func__ identifier. __FUNCTION__ is a preprocessor definition that is provided as an extension by compilers. This was the only convenient option to rely on pre-C++11. However, C++11 and greater mandate the predefined identifier __func__, which lets us accomplish the same thing. The difference between the two, however, is that __func__ isn't a preprocessor macro, it's an actual identifier that exists at function scope. The C++17 draft standard (N4659) at section [dcl.fct.def.general] paragraph 8 states: " The function-local predefined variable __func__ is defined as if a definition of the form static const char __func__[] = "function-name "; had been provided, where function-name is an implementation-defined string. It is unspecified whether such a variable has an address distinct from that of any other object in the program. " Thankfully, we don't do any macro or string concatenation with __FUNCTION__ that can't be modified to use __func__. |
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