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      std::future_error::future_error

      From cppreference.com
      <cpp‎ |thread‎ |future error
       
       
      Concurrency support library
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      future_error(const future_error& other)noexcept;
      		 (1)(since C++11)
      explicit future_error(std::future_errc ec);
      		 (2)(since C++17)
      1) Copy constructor. Initializes the contents of the newfuture_error object with those ofother. If*this andother both have dynamic typestd::future_error thenstd::strcmp(what(), other.what())==0.
      2) Constructs a newfuture_error object containing the error codestd::make_error_code(ec).

      [edit]Parameters

      other - anotherfuture_error object to copy
      ec - error code

      [edit]Notes

      There is no standard-compliant way for the user to construct afuture_error other than copying from anotherfuture_error prior to C++17. C++11 and C++14 depict an exposition-only public constructor taking astd::error_code, and some implementations provide such a constructor.

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