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lysdexic@programming.devM to C++@programming.devEnglish · 2 years ago

On harmful overuse of std::move - The Old New Thing

devblogs.microsoft.com

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On harmful overuse of std::move - The Old New Thing

devblogs.microsoft.com

lysdexic@programming.devM to C++@programming.devEnglish · 2 years ago
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Initial excitement leads to overuse.
  • lysdexic@programming.devOPM
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    2 years ago

    RVO

    I recommend you read the thread.

    • Dani (:cxx: modules addict)@hachyderm.io
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      2 years ago

      @lysdexic I did.

      • lysdexic@programming.devOPM
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        2 years ago

        It doesn’t look like it, otherwise you’d be aware that the whole point of this submission is that casting return values with std::move disables RVO.

        • Dani (:cxx: modules addict)@hachyderm.io
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          2 years ago

          @lysdexic You claimed otherwise:
          "
          These std::move invocations are harmless, as they only cast objects to their rvalue reference.
          "
          If you were right, we wouldn’t have the motivation to look at this in EWG.

          • lysdexic@programming.devOPM
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            2 years ago

            If you were right, we wouldn’t have the motivation to look at this in EWG.

            I am right. Not benefiting from RVO does not mean you’re harming anyone.

            Again, I recommend you read the submission and also the discussion.

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