std::error_code - Man Page

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

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.

Definition at line 180 of file system_error.

Author

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Info

Mon May 31 2021 libstdc++