std::regex_traits::translate

C++

Language

Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

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

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_traits

Member Functions

regex_traits::regex_traits

regex_traits::length

regex_traits::translate

regex_traits::translate_nocase

regex_traits::transform

regex_traits::transform_primary

regex_traits::lookup_collatename

regex_traits::lookup_classname

regex_traits::isctype

regex_traits::value

regex_traits::imbue

regex_traits::getloc

CharT translate(CharT c) const;

Obtains the comparison key for the character c, such that all characters that are equivalent to this character in the imbued locale produce the same key.

When the regex library needs to match two characters c1 and c2 and the flag std::regex_constants::collate is true, it executes regex_traits<>::translate(c1) == regex_traits<>::translate(c2).

Standard library specializations of std::regex_traits return c unmodified.

Parameters

c

-

character that needs to be examined for equivalence

Return value

The comparison key for c in the currently imbued locale.