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

 

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*     move( char_type* dest, const char_type* src, std::size_t count );		(constexpr since C++20)

Copies count characters from the character string pointed to by src to the character string pointed to by dest.

Performs correctly even if the ranges [src, src + count) and [dest, dest + count) overlap.

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

Parameters

dest	-	pointer to a character string to copy to
src	-	pointer to a character string to copy from
count	-	the number of characters to copy

Return value

dest

Exceptions

Throws nothing.

Complexity

Linear in count.

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 7	C++98	the copy was guaranteed to perform correctly if src is in [dest, dest + count), but not the other way round (i.e. dest is in [src, src + count))	also guaranteed