NAME

       std::error_code

SYNOPSIS

   Public Member Functions
       template<typename _ErrorCodeEnum , typename  = typename
           enable_if<is_error_code_enum<_ErrorCodeEnum>::value>::type> error_code (_ErrorCodeEnum
           __e) noexcept
       error_code (int __v, const error_category &__cat) noexcept
       void assign (int __v, const error_category &__cat) noexcept
       const error_category & category () const noexcept
       void clear () noexcept
       error_condition default_error_condition () const noexcept
       _GLIBCXX_DEFAULT_ABI_TAG string message () const
       operator bool () const noexcept
       template<typename _ErrorCodeEnum > enable_if< is_error_code_enum< _ErrorCodeEnum >::value,
           error_code & >::type operator= (_ErrorCodeEnum __e) noexcept
       int value () const noexcept

   Related Functions
       (Note that these are not member functions.)
       error_condition make_error_condition (errc) noexcept
       bool operator!= (const error_code &__lhs, const error_code &__rhs) noexcept
       bool operator== (const error_code &__lhs, const error_code &__rhs) noexcept

           error_code make_error_code (errc __e) noexcept

Detailed Description

       Class error_code

       This class is a value type storing an integer error number and a category that gives
       meaning to the error number. Typically this is done close the the point where the error
       happens, to capture the original error value.

       An error_code object can be used to store the original error value emitted by some
       subsystem, with a category relevant to the subsystem. For example, errors from POSIX
       library functions can be represented by an errno value and the 'generic' category, but
       errors from an HTTP library might be represented by an HTTP response status code (e.g.
       404) and a custom category defined by the library.

Author

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