std::literals::string_view_literals::operator""sv

 

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 Modifers 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::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<< operator""sv Helper classes hash<std::string_view>hash<std::wstring_view>hash<std::u16string_view>hash<std::u32string_view>

 

Defined in header <string_view>
constexpr string_view operator "" sv(const char* str, size_t len) noexcept;	(1)	(since C++17)
constexpr u16string_view operator "" sv(const char16_t* str, size_t len) noexcept;	(2)	(since C++17)
constexpr u32string_view operator "" sv(const char32_t* str, size_t len) noexcept;	(3)	(since C++17)
constexpr wstring_view   operator "" sv(const wchar_t* str, size_t len) noexcept;	(4)	(since C++17)

Forms a string view of a character literal.

1) returns std::string_view{str, len}

2) returns std::u16string_view{str, len}

3) returns std::u32string_view{str, len}

4) returns std::wstring_view{str, len}

Parameters

str	-	pointer to the beginning of the raw character array literal
len	-	length of the raw character array literal

Return value

The string_view literal.

Notes

These operators are declared in the namespace std::literals::string_view_literals, where both literals and string_view_literals are inline namespaces. Access to these operators can be gained with using namespace std::literals, using namespace std::string_view_literals, and using namespace std::literals::string_view_literals.

Example

Run this code

#include <string_view>
#include <iostream>
 
int main()
{
    using namespace std::literals;
 
    std::string_view s1 = "abc\0\0def";
    std::string_view s2 = "abc\0\0def"sv;
    std::cout << "s1: " << s1.size() << " \"" << s1 << "\"\n";
    std::cout << "s2: " << s2.size() << " \"" << s2 << "\"\n";
}

Possible output:

s1: 3 "abc"
s2: 8 "abc^@^@def"

See also

(constructor)

constructs a basic_string_view (public member function)