Mark expected as [[nodiscard]] #74
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Since it holds either a result or an error (that is, it always might hold an error), an `expected` return value should never be blindly discarded.
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…NODISCARD (#74, thanks Quuxplusone)
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expected.t.cpp(1347): warning C4834: discarding return value of function with 'nodiscard' attribute
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Awesome, looks like I can close this. :) FYI, Microsoft STL marked theirs last week in microsoft/STL@7643c27 . |
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Thanks, see that exceptions such as |
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martinmoene
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…_CONFIG_NO_NODISCARD (#74, nonstd-lite-project issue 74) nonstd-lite/nonstd-lite#74
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Microsoft STL added [[nodiscard]] on 2024-12-13; see microsoft/STL#5174 martinmoene/expected-lite added [[nodiscard]] on 2024-12-10; see nonstd-lite/expected-lite#74
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* test: Silence "non-void function does not return a value" * Add [[nodiscard]] to tl::expected Microsoft STL added [[nodiscard]] on 2024-12-13; see microsoft/STL#5174 martinmoene/expected-lite added [[nodiscard]] on 2024-12-10; see nonstd-lite/expected-lite#74
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Since it holds either a result or an error (that is, it always might hold an error), an
expectedreturn value should never be blindly discarded.At least that's my take on it: https://quuxplusone.github.io/blog/2024/12/08/should-expected-be-nodiscard/
boost::outcome_v2::result<T>andllvm::Expected<T>are already marked nodiscard. No vendor'sstd::expectedis marked yet, but the /r/cpp chatter re my above post makes it sound like both STL and jwakely are at least considering it now.IMHO this is a Very Good Idea, but if you as the project owner think it's not (or not yet), then feel free to close it.