std::basic_string_view

`<string_view>`
`template< class CharT, class Traits = std::char_traits<CharT> > class basic_string_view;`		( C++17)

basic_string_view , CharT .

std::basic_string_view TriviallyCopyable.

( C++23)

: CharT .

:

`<string_view>`


std::string_view	`std::basic_string_view<char>`
std::wstring_view	`std::basic_string_view<wchar_t>`
std::u8string_view (C++20)	`std::basic_string_view<char8_t>`
std::u16string_view	`std::basic_string_view<char16_t>`
std::u32string_view	`std::basic_string_view<char32_t>`

CharT
Traits		CharTraits . std::basic_string, `Traits::char_type` , `CharT`, .

traits_type Traits

value_type CharT

pointer CharT*

const_pointer const CharT*

reference CharT&

const_reference const CharT&

const_iterator

LegacyRandomAccessIterator

and LegacyContiguousIterator	( C++20)
ConstexprIterator, and `contiguous_iterator`	( C++20)

whose value_type is CharT

iterator const_iterator

const_reverse_iterator std::reverse_iterator<const_iterator>

reverse_iterator const_reverse_iterator

size_type std::size_t

difference_type std::ptrdiff_t

: iterator const_iterator , .

Container iterator const_iterator basic_string_view.

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() (C++17)	`basic_string_view` (public -) []
operator= (C++17)	(public -) []

begincbegin (C++17)	(public -) []
endcend (C++17)	(public -) []
rbegincrbegin (C++17)	(public -) []
rendcrend (C++17)	(public -) []

operator[] (C++17)	(public -) []
at (C++17)	(public -) []
front (C++17)	(public -) []
back (C++17)	(public -) []
data (C++17)	(public -) []

sizelength (C++17)	(public -) []
max_size (C++17)	(public -) []
empty (C++17)	, (public -) []

remove_prefix (C++17)	, (public -) []
remove_suffix (C++17)	, (public -) []
swap (C++17)	(public -) []

copy (C++17)	(public -) []
substr (C++17)	(public -) []
compare (C++17)	(public -) []
starts_with (C++20)	, (public -) []
ends_with (C++20)	, (public -) []
contains (C++23)	, (public -) []
find (C++17)	(public -) []
rfind (C++17)	(public -) []
find_first_of (C++17)	(public -) []
find_last_of (C++17)	(public -) []
find_first_not_of (C++17)	(public -) []
find_last_not_of (C++17)	(public -) []

npos [static] (C++17)	. (public static -) []

,

operator==operator!=operator<operator>operator<=operator>=operator<=> (C++17)( C++20)( C++20)( C++20)( C++20)( C++20)(C++20)	( ) []
/
operator<< (C++17)	( ) []

`std::literals::string_view_literals`
operator""sv (C++17)	() []

std::hash<std::string_view>std::hash<std::wstring_view>std::hash<std::u8string_view>std::hash<std::u16string_view>std::hash<std::u32string_view>

(C++17)(C++17)(C++20)(C++17)(C++17)

( ) []

`template<class CharT, class Traits> inline constexpr bool ranges::enable_borrowed_range<std::basic_string_view<CharT, Traits>> = true;`		( C++20)

std::ranges::enable_borrowed_range basic_string_view borrowed_range.

`template<class CharT, class Traits> inline constexpr bool ranges::enable_view<std::basic_string_view<CharT, Traits>> = true;`		( C++20)

std::ranges::enable_view basic_string_view view.

( C++20)

, std::string_view , :

std::string_view good {" "};
  // "" : `good`    .  
  //      .

std::string_view bad {" "s};	
  // "" : `bad`   ,   std::string,	
  //  std::operator""s,     .

std::basic_string_view , , C++23.


`__cpp_lib_string_view`	`201606L`	(C++17)	`std::string_view`
`__cpp_lib_string_view`	`201803L`	(C++20)	ConstexprIterator
`__cpp_lib_string_contains`	`202011L`	(C++23)	`contains`

#include <iostream>
#include <string_view>

int main() {
    constexpr std::string_view unicode[] {
        "", "", "", ""
    };

    for (int y{}, p{}; y != 6; ++y, p = ((p + 1) % 4)) {
        for (int x{}; x != 16; ++x)
            std::cout << unicode[p];
        std::cout << '\n';
    }
}

:

basic_string	( ) []
span (C++20)	( ) []
initializer_list (C++11)	, ( ) []

cppreference.com

std::basic_string_view

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,

/

( C++20)