I need the semantics of the [[nodiscard]] attribute in a non-C++17 codebase. I guess there are compiler dependent ways of achieving this before C++17. Does anyone know these? I am interested in the ones for clang,gcc, and MSVC.
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Alex Guteniev
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gexicide
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1What semantics? All nodiscard does is say "hey, if this return value is discarded you should probably issue a warning". – Cubic Jul 19 '17 at 12:39
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@Cubic: Exactly this! – gexicide Jul 19 '17 at 12:39
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A good place to look would be the compiler documentation. – Galik Jul 19 '17 at 12:41
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GCC can use `__attribute__((warn_unused_result))`. – 0x5453 Jul 19 '17 at 12:42
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[strongly related](https://stackoverflow.com/q/2042780/1708801) – Shafik Yaghmour Jul 22 '18 at 15:50
1 Answers
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- GCC/Clang:
__attribute__((warn_unused_result)) - MSVC:
_Check_return_for_MSC_VER >= 1700(Visual Studio 2012)
Nikolai Shalakin
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