operator==,!=,<(std::error_condition)

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

 

Utilities library

Type support (basic types, RTTI, type traits)

Dynamic memory management

Error handling

Program utilities

Variadic functions

Date and time

Function objects

initializer_list (C++11)

bitset

hash (C++11)

Relational operators

rel_ops::operator!=rel_ops::operator>rel_ops::operator<=rel_ops::operator>=

optional, any and variant (C++17)

optional

any

variant

in_placein_place_typein_place_indexin_place_tin_place_type_tin_place_index_t

Pairs and tuples

pair

tuple (C++11)

apply (C++17)

make_from_tuple (C++17)

piecewise_construct_t (C++11)

piecewise_construct (C++11)

integer_sequence (C++14)

Swap, forward and move

swap

exchange (C++14)

forward (C++11)

move (C++11)

move_if_noexcept (C++11)

Elementary string conversions

to_chars (C++17)

from_chars (C++17)

chars_format (C++17)

Type operations

declval (C++11)

as_const (C++17)

 

Error handling

Exception handling exception uncaught_exceptionuncaught_exceptions (C++17) exception_ptr (C++11) make_exception_ptr (C++11) current_exception (C++11) rethrow_exception (C++11) nested_exception (C++11) throw_with_nested (C++11) rethrow_if_nested (C++11) Exception handling failures terminate terminate_handler get_terminate (C++11) set_terminate bad_exception unexpected (until C++17) unexpected_handler (until C++17) get_unexpected (C++11)(until C++17) set_unexpected (until C++17)

Exception categories logic_error invalid_argument domain_error length_error out_of_range runtime_error range_error overflow_error underflow_error tx_exception (TM TS) Error codes Error codes errno Assertions assert system_error facility error_category (C++11) generic_category (C++11) system_category (C++11) error_condition (C++11) errc (C++11) error_code (C++11) system_error (C++11)

 

std::error_condition

Member functions

error_condition::error_condition

error_condition::operator=

error_condition::assign

error_condition::clear

error_condition::value

error_condition::category

error_condition::message

error_condition::operator bool

Non-member functions

operator==operator!=operator<

Helper classes

is_error_condition_enum

hash<std::error_condition>

 

Defined in header <system_error>
bool operator==( const error_condition& lhs, const error_condition& rhs );	(1)	(since C++11)
bool operator==( const error_code& lhs, const error_condition& rhs );	(2)	(since C++11)
bool operator==( const error_condition& lhs, const error_code& rhs );	(2)	(since C++11)
bool operator!=( const error_condition& lhs, const error_condition& rhs );	(3)	(since C++11)
bool operator!=( const error_code& lhs, const error_condition& rhs );	(4)	(since C++11)
bool operator!=( const error_condition& lhs, const error_code& rhs );	(4)	(since C++11)
bool operator<( const error_condition& lhs, const error_condition& rhs );	(5)	(since C++11)

Compares two error conditions.

1-2) Checks whether lhs and rhs are equal.

3-4) Checks whether lhs and rhs are not equal.

5) Checks whether lhs is less than rhs.

Parameters

lhs, rhs

-

error conditions to compare

Return value

1) true if the error category and error value compare equal.

2) true if lhs.category().equivalent(lhs.value(), rhs) or rhs.category().equivalent(lhs, rhs.value()) is true.

3) true if the error category or error value compare are not equal.

4) true if lhs.category().equivalent(lhs.value(), rhs) and rhs.category().equivalent(lhs, rhs.value()) are both false.

5) true if lhs.category() < rhs.category(). Otherwise, true if lhs.category() == rhs.category() && lhs.value() < rhs.value(). Otherwise, false.

Exceptions

noexcept specification:  

noexcept