libstdc++
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#include <system_error>
Public Member Functions | |
template<typename _ErrorCodeEnum , typename = _Check<_ErrorCodeEnum>> | |
error_code (_ErrorCodeEnum __e) noexcept | |
error_code (const error_code &)=default | |
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 |
string | message () const |
operator bool () const noexcept | |
error_code & | operator= (const error_code &)=default |
int | value () const noexcept |
Related Symbols | |
(Note that these are not member symbols.) | |
error_code | make_error_code (errc __e) noexcept |
strong_ordering | operator (const error_code &__lhs, const error_code &__rhs) noexcept |
template<typename _CharT , typename _Traits > | |
basic_ostream< _CharT, _Traits > & | operator<< (basic_ostream< _CharT, _Traits > &__os, const error_code &__e) |
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 223 of file system_error.
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inlinenoexcept |
Definition at line 229 of file system_error.
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inlinenoexcept |
Definition at line 232 of file system_error.
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inlinenoexcept |
Initialize with a user-defined type, by calling make_error_code.
Definition at line 238 of file system_error.
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inlinenoexcept |
Definition at line 248 of file system_error.
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inlinenoexcept |
The error category that this error belongs to.
Definition at line 266 of file system_error.
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inlinenoexcept |
Definition at line 255 of file system_error.
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noexcept |
An error_condition
for this error's category and value.
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inline |
The category's description of the value.
Definition at line 275 of file system_error.
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inlineexplicitnoexcept |
Test whether value()
is non-zero.
Definition at line 280 of file system_error.
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inlinenoexcept |
The error value.
Definition at line 261 of file system_error.