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Here is a simplified version of what I'm trying to do enum First { a, b, c, nbElementFirstEnum, }; enum Second { a, b, c, nbElementSecondEnum, }; static_assert( First::nbElementFirstEnum == Second::nbElementSecondEnum, "Not the same number of element in the enums."); /*static_assert( First::nbElementFirstEnum == Second::nbElementSecondEnum, "Not the same number of element in the enums." + First::nbElementFirstEnum + " " + Second::nbElementSecondEnum);*/ But I would like to be able to print the value of First::nbElementFirstEnum and Second::nbElementSecondEnum in the assert message (like in the commented version which obviously doesn't work). I have tryed using macro concatenation with "#". I also tryed using variadic templates, retrieveing with %10 each number and adding the '0' character to the value retrieved, but all I get is a constexpr char[]. So my question is how can I get my enums values to be printed in a string literal. Possible duplicates : C++11 static_assert: Parameterized error messages Integrate type name in static_assert output? The most interesting topic was this one: Printing sizeof(T) at compile time But I don't want to have a warning, or decomment code to know the values.

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