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  1. Apache Arrow
  2. ARROW-13444

[C++] C++20 compatibility by updating std::result_of to std::invoke_result

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    • Wish
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 4.0.1
    • 6.0.0
    • C++

    Description

      There are currently 5 header files which uses std::result_of. As specified here https://en.cppreference.com/w/cpp/types/result_of, std::result_of got deprecated in c+17 and removed in c20. Because of this, its not possible to include the c+ arrow headers in a project using c++20 without getting compilation errors.

      To solve this, cppreference specifies how std::invoke_result can be used instead of std::result_of. Unfortunately std::invoke_result was only added in c+17 and therefore I expect that solving this will require some macro work, to keep c+14 and lower support.

       

      This is  the first time I post an issue and I hope I have followed the rules.

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              bkietz Ben Kietzman
              Awia Anders Wind
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