std::regex_iterator<BidirIt,CharT,Traits>::operator==,operator!=

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

Memory management library

Metaprogramming library (C++11)

General utilities library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Strings library

Text processing library

Numerics library

Date and time library

Input/output library

Filesystem library (C++17)

Concurrency support library (C++11)

Execution control library (C++26)

Technical specifications

Symbols index

External libraries

 

Text processing library

Localization library

Regular expressions library (C++11)

Formatting library (C++20)

Null-terminated sequence utilities

Byte strings

Multibyte strings

Wide strings

Primitive numeric conversions

to_chars (C++17) to_chars_result (C++17) from_chars (C++17) from_chars_result (C++17) chars_format (C++17)

Text encoding identifications

text_encoding (C++26)

 

Regular expressions library

Classes

basic_regex (C++11)

sub_match (C++11)

match_results (C++11)

Algorithms

regex_match (C++11)

regex_search (C++11)

regex_replace (C++11)

Iterators

regex_iterator (C++11)

regex_token_iterator (C++11)

Exceptions

regex_error (C++11)

Traits

regex_traits (C++11)

Constants

syntax_option_type (C++11)

match_flag_type (C++11)

error_type (C++11)

Regex Grammar

Modified ECMAScript-262 (C++11)

 

std::regex_iterator

Member functions

regex_iterator::regex_iterator

regex_iterator::operator=

Comparisons

regex_iterator::operator==regex_iterator::operator!= (until C++20)

Observers

regex_iterator::operator*regex_iterator::operator->

Modifiers

regex_iterator::operator++regex_iterator::operator++(int)

 

bool operator==( const regex_iterator& rhs ) const;	(1)	(since C++11)
bool operator!=( const regex_iterator& rhs ) const;	(2)	(since C++11) (until C++20)

Compares two regex_iterators.

The != operator is synthesized from operator==.

(since C++20)

Parameters

rhs

-

a regex_iterator to compare to

Return value

For the sake of exposition, assume that regex_iterator contains the following members:

• BidirIt begin;
• BidirIt end;
• const regex_type *pregex;
• std::regex_constants::match_flag_type flags;
• std::match_results<BidirIt> match;

1) Returns true if *this and rhs are both end-of-sequence iterators, or if all of the following conditions are true:

• begin == rhs.begin
• end == rhs.end
• pregex == rhs.pregex
• flags == rhs.flags
• match[0] == rhs.match[0]

2) Returns !(*this == rhs).

Example

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