Collaboration diagram for Diagnostics:

Topics
	Exceptions

Classes
class	std::error_category

class	std::error_code

class	std::error_condition

struct	std::is_error_code_enum< _Tp >

struct	std::is_error_condition_enum< _Tp >

Functions
const error_category &	std::generic_category () noexcept

error_code	make_error_code (errc __e) noexcept

error_condition	make_error_condition (errc __e) noexcept

template<typename _CharT, typename _Traits>
basic_ostream< _CharT, _Traits > &	operator<< (basic_ostream< _CharT, _Traits > &__os, const error_code &__e)

strong_ordering	operator<=> (const error_code &__lhs, const error_code &__rhs) noexcept

strong_ordering	operator<=> (const error_condition &__lhs, const error_condition &__rhs) noexcept

bool	operator== (const error_code &__lhs, const error_code &__rhs) noexcept

bool	operator== (const error_code &__lhs, const error_condition &__rhs) noexcept

bool	operator== (const error_condition &__lhs, const error_condition &__rhs) noexcept

const error_category &	std::system_category () noexcept

Variables
template<typename _Tp>
constexpr bool	std::is_error_code_enum_v

template<typename _Tp>
constexpr bool	std::is_error_condition_enum_v

Detailed Description

Components for error handling, reporting, and diagnostic operations.

Function Documentation

◆ generic_category()

const error_category & std::generic_category ( )

noexcept

Error category for errno error codes.

◆ make_error_code()

error_code make_error_code ( errc __e )

Create an error_code representing a standard errc condition.

The std::errc constants correspond to errno macros and so use the generic category.

Since: C++11

Definition at line 304 of file system_error.

◆ make_error_condition()

error_condition make_error_condition ( errc __e )

Create an error_condition representing a standard errc condition.

The std::errc constants correspond to errno macros and so use the generic category.

Since: C++11

Definition at line 437 of file system_error.

◆ operator<<()

template<typename _CharT, typename _Traits>

basic_ostream< _CharT, _Traits > & operator<<	(	basic_ostream< _CharT, _Traits > &	__os,
		const error_code &	__e )

Write a std::error_code to an ostream.

Since: C++11

Definition at line 317 of file system_error.

◆ operator<=>() [1/2]

strong_ordering operator<=>	(	const error_code &	__lhs,
		const error_code &	__rhs )

Ordered comparison for std::error_code.

This defines a total order by comparing the categories, and then if they are equal comparing the values.

Since: C++11

Definition at line 317 of file system_error.

◆ operator<=>() [2/2]

strong_ordering operator<=>	(	const error_condition &	__lhs,
		const error_condition &	__rhs )

Ordered comparison for std::error_condition.

This defines a total order by comparing the categories, and then if they are equal comparing the values.

Since: C++11

Definition at line 499 of file system_error.

◆ operator==() [1/3]

bool operator==	(	const error_code &	__lhs,
		const error_code &	__rhs )

Equality comparison for std::error_code.

Returns true only if they have the same category and the same value.

Since: C++11

Definition at line 451 of file system_error.

◆ operator==() [2/3]

bool operator==	(	const error_code &	__lhs,
		const error_condition &	__rhs )

Equality comparison for std::error_code and std::error_condition.

Uses each category's equivalent member function to check whether the values correspond to an equivalent error in that category.

Since: C++11

Definition at line 467 of file system_error.

◆ operator==() [3/3]

bool operator==	(	const error_condition &	__lhs,
		const error_condition &	__rhs )

Equality comparison for std::error_condition.

Returns true only if they have the same category and the same value.

Since: C++11

Definition at line 482 of file system_error.

◆ system_category()

const error_category & std::system_category ( )

noexcept

Error category for other error codes defined by the OS.

Variable Documentation

◆ is_error_code_enum_v

template<typename _Tp>

bool std::is_error_code_enum_v

inlineconstexpr

Definition at line 76 of file system_error.

◆ is_error_condition_enum_v