std::literals::string_view_literals::operator""sv (3) - Linux Manuals

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

NAME

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

Synopsis

Defined in header <string_view>
constexpr string_view operator "" sv(const char* str, size_t len) noexcept; (1) (since C++17)
constexpr u8string_view operator "" sv(const char8_t* str, size_t len) noexcept; (2) (since C++20)
constexpr u16string_view operator "" sv(const char16_t* str, size_t len) noexcept; (3) (since C++17)
constexpr u32string_view operator "" sv(const char32_t* str, size_t len) noexcept; (4) (since C++17)
constexpr wstring_view operator "" sv(const wchar_t* str, size_t len) noexcept; (5) (since C++17)

Forms a string view of a character literal.
1) returns std::string_view{str, len}
2) returns std::u8string_view{str, len}
3) returns std::u16string_view{str, len}
4) returns std::u32string_view{str, len}
5) 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"