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std::future_error:: future_error

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std::future_error
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 new future_error object with those of other . If * this and other both have dynamic type std::future_error then std:: strcmp ( what ( ) , other. what ( ) ) == 0 .
2) Constructs a new future_error object containing the error code std:: make_error_code ( ec ) .

Parameters

other - another future_error object to copy
ec - error code

Notes

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