std::basic_string_view<CharT,Traits>::swap

 

C++

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Technical Specifications

 

Strings library

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Classes

basic_string

basic_string_view (C++17)

char_traits

 

std::basic_string_view

Member functions basic_string_view::basic_string_view basic_string_view::operator= Iterators basic_string_view::beginbasic_string_view::cbegin basic_string_view::endbasic_string_view::cend basic_string_view::rbeginbasic_string_view::crbegin basic_string_view::rendbasic_string_view::crend Element access basic_string_view::at basic_string_view::operator[] basic_string_view::front basic_string_view::back basic_string_view::data Capacity basic_string_view::sizebasic_string_view::length basic_string_view::max_size basic_string_view::empty Modifiers basic_string_view::remove_prefix basic_string_view::remove_suffix basic_string_view::swap

Operations basic_string_view::copy basic_string_view::substr basic_string_view::compare basic_string_view::starts_with (C++20) basic_string_view::ends_with (C++20) basic_string_view::find basic_string_view::rfind basic_string_view::find_first_of basic_string_view::find_last_of basic_string_view::find_first_not_of basic_string_view::find_last_not_of Constants basic_string_view::npos Non-member functions operator==operator!=operator<operator>operator<=operator>=operator<=> (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20) operator<< operator""sv Helper classes hash<std::string_view>hash<std::wstring_view>hash<std::u8string_view>hash<std::u16string_view>hash<std::u32string_view> (C++20) Deduction guides(C++20)

 

constexpr void swap(basic_string_view& v) noexcept;		(since C++17)

Exchanges the view with that of v.

Parameters

v

-

view to swap with

Return value

(none)

Complexity

Constant.

Example

Run this code

#include <string_view>
#include <iostream>
 
int main() {
    auto s1{ std::string_view{"⏺⏺⏺⏺⏺"} };
    auto s2{ std::string_view{"⏹⏹⏹⏹⏹"} };
 
    std::cout << "Before : " << s1 << ' ' << s2 << "\n";
    s1.swap(s2);
    std::cout << "After  : " << s1 << ' ' << s2 << "\n";
}

Output:

Before : ⏺⏺⏺⏺⏺ ⏹⏹⏹⏹⏹
After  : ⏹⏹⏹⏹⏹ ⏺⏺⏺⏺⏺