libstdc++
std::error_code Class Reference

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_categorycategory () 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.

Definition at line 180 of file system_error.


The documentation for this class was generated from the following file: