Reference

function
<system_error>

std::make_error_code

error_code make_error_code (errc e) noexcept;
Make error code
Creates an error_code object (of the generic_category) from the errc enum value e.

It returns the same as
1
error_code(static_cast<int>(e),generic_category());

This function is called by error_code 's constructor for error code enum types, and should be overloaded for all custom error code enum types defined in order to provide a mechanism to generate the appropriate error_code objects from them.

The standard library overloads this function for the io_errc and future_errc types: see make_error_code(io_errc) and make_error_code(future_errc) .

Parameters

e
An enum value of type errc (see errc ).

Return value

An error_code object representing the enum value e.

See also

error_code::error_code
Construct error_code (public member function)

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