std::char_traits<char>::to_char_type, std::char_traits<wchar_t>::to_char_type, std::char_traits<char8_t>::to_char_type, std::char_traits<char16_t>::to_char_type, std::char_traits<char32_t>::to_char_type

 

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)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Execution support library (C++26)

Technical specifications

Symbols index

External libraries

 

Strings library

Null-terminated strings

Byte strings

Multibyte strings

Wide strings

Classes

basic_string

basic_string_view (C++17)

char_traits

 

std::char_traits

Member functions

char_traits::assign

char_traits::eqchar_traits::lt

char_traits::move

char_traits::copy

char_traits::compare

char_traits::length

char_traits::find

char_traits::to_char_type

char_traits::to_int_type

char_traits::eq_int_type

char_traits::eof

char_traits::not_eof

 

static char_type to_char_type( int_type c );		(constexpr since C++11) (noexcept since C++11)

Converts c to char_type. If there is no equivalent char_type value (such as when c is a copy of the eof() value), the result is unspecified.

See CharTraits for the general requirements on character traits for X::to_char_type.

Parameters

c

-

value to convert

Return value

A value equivalent to c.

Complexity

Constant.