Experimental library header <experimental/string_view>

 

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)

Diagnostics library

Memory management library

Metaprogramming library (C++11)

General utilities library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Strings library

Text processing library

Numerics library

Date and time library

Input/output library

Filesystem library (C++17)

Concurrency support library (C++11)

Execution control library (C++26)

Technical specifications

Symbols index

External libraries

 

Standard library headers

Language support <cfloat> <climits> <compare> (C++20) <contracts> (C++26) <coroutine> (C++20) <csetjmp> <csignal> <cstdarg> <cstddef> <cstdint> (C++11) <cstdlib> <exception> <initializer_list> (C++11)    <limits> <new> <source_location> (C++20) <stdfloat> (C++23) <typeinfo> <version> (C++20) Concepts <concepts> (C++20) Diagnostics <cassert> <cerrno> <debugging> (C++26) <stacktrace> (C++23) <stdexcept> <system_error> (C++11) Memory management <memory> <memory_resource> (C++17) <scoped_allocator> (C++11) Metaprogramming <type_traits> (C++11) <ratio> (C++11)

General utilities <any> (C++17) <bitset> <bit> (C++20) <charconv> (C++17) <expected> (C++23) <format> (C++20) <functional> <optional> (C++17) <stdbit.h> (C++26) <tuple> (C++11) <typeindex> (C++11) <utility> <variant> (C++17) Containers <array> (C++11) <deque> <flat_map> (C++23) <flat_set> (C++23) <forward_list> (C++11) <hive> (C++26) <inplace_vector> (C++26)    <list> <map> <mdspan> (C++23) <queue> <set> <span> (C++20) <stack> <unordered_map> (C++11) <unordered_set> (C++11) <vector> Iterators <iterator> Ranges <generator> (C++23) <ranges> (C++20)

Algorithms <algorithm> <numeric> Strings <cctype> <cstring> <cuchar> (C++11) <cwchar> <cwctype> <string_view> (C++17) <string> Text processing <clocale> <codecvt> (C++11/17/26*) <locale> <regex> (C++11) <text_encoding> (C++26)    Numerics <cfenv> (C++11) <cmath> <complex> <linalg> (C++26) <numbers> (C++20) <random> (C++11) <simd> (C++26) <stdckdint.h> (C++26) <valarray> Time <chrono> (C++11) <ctime> C compatibility <ccomplex> (C++11/17/20*) <ciso646> (until C++20) <cstdalign> (C++11/17/20*) <cstdbool> (C++11/17/20*) <ctgmath> (C++11/17/20*)

Input/output <cinttypes> (C++11) <cstdio> <filesystem> (C++17) <fstream> <iomanip> <iosfwd> <iostream> <ios> <istream> <ostream> <print> (C++23) <spanstream> (C++23) <sstream> <streambuf> <strstream> (C++98/26*) <syncstream> (C++20) Concurrency support <atomic> (C++11) <barrier> (C++20) <condition_variable> (C++11) <future> (C++11) <hazard_pointer> (C++26) <latch> (C++20) <mutex> (C++11) <rcu> (C++26) <semaphore> (C++20) <shared_mutex> (C++14) <stdatomic.h> (C++23) <stop_token> (C++20) <thread> (C++11) Execution support <execution> (C++17)

 

Experimental library headers

Execution P2300
<experimental/execution>
Filesystem TS
<experimental/filesystem>
Parallelism TS (v1, v2)
experimental/algorithm experimental/execution_policy experimental/exception_list	experimental/numeric <experimental/simd> experimental/task_block
Library Fundamentals TS (v1, v2, v3)
experimental/algorithm <experimental/any> experimental/array experimental/chrono experimental/deque experimental/forward_list <experimental/functional> experimental/future experimental/iterator experimental/list experimental/map experimental/memory <experimental/memory_resource> experimental/numeric <experimental/optional> experimental/propagate_const	experimental/random experimental/ratio experimental/regex experimental/scope experimental/set experimental/source_location experimental/string <experimental/string_view> experimental/system_error experimental/tuple experimental/type_traits experimental/unordered_map experimental/unordered_set experimental/utility experimental/vector
Concurrency TS
experimental/atomic experimental/barrier	experimental/future experimental/latch
Ranges TS
<experimental/ranges/algorithm> <experimental/ranges/concepts> <experimental/ranges/functional>         <experimental/ranges/iterator>	<experimental/ranges/random> <experimental/ranges/tuple> <experimental/ranges/type_traits> <experimental/ranges/utility>
Coroutines TS
experimental/coroutine
Networking TS
experimental/buffer experimental/executor experimental/internet experimental/io_context	<experimental/net> experimental/netfwd experimental/socket experimental/timer
Reflection TS
<experimental/reflect>

 

See More

This header is part of the Library Fundamentals TS (v1, v2).

Classes

Name	Description
std::experimental::basic_string_view (library fundamentals TS)	Class template representing a reference to a character string (class template)
std::experimental::string_view (library fundamentals TS)	std::experimental::basic_string_view<char> (typedef)
std::experimental::wstring_view (library fundamentals TS)	std::experimental::basic_string_view<wchar_t> (typedef)
std::experimental::u16string_view (library fundamentals TS)	std::experimental::basic_string_view<char16_t> (typedef)
std::experimental::u32string_view (library fundamentals TS)	std::experimental::basic_string_view<char32_t> (typedef)
std::hash<std::experimental::string_view> (library fundamentals TS)	(class template specialization)
std::hash<std::experimental::u16string_view> (library fundamentals TS)	(class template specialization)
std::hash<std::experimental::u32string_view> (library fundamentals TS)	(class template specialization)
std::hash<std::experimental::wstring_view> (library fundamentals TS)	(class template specialization)

Functions

operator==operator!=operator<operator>operator<=operator>=	lexicographically compares two views (function template)
Output
operator<<	performs stream output on views (function template)

Synopsis

namespace std {
  namespace experimental {
  inline namespace fundamentals_v1 {

    // 7.2, Class template basic_string_view
    template<class CharT, class Traits = char_traits<CharT>>
        class basic_string_view;

    // 7.9, basic_string_view non-member comparison functions
    template<class CharT, class Traits>
    constexpr bool operator==(basic_string_view<CharT, Traits> x,
                              basic_string_view<CharT, Traits> y) noexcept;
    template<class CharT, class Traits>
    constexpr bool operator!=(basic_string_view<CharT, Traits> x,
                              basic_string_view<CharT, Traits> y) noexcept;
    template<class CharT, class Traits>
    constexpr bool operator< (basic_string_view<CharT, Traits> x,
                                 basic_string_view<CharT, Traits> y) noexcept;
    template<class CharT, class Traits>
    constexpr bool operator> (basic_string_view<CharT, Traits> x,
                              basic_string_view<CharT, Traits> y) noexcept;
    template<class CharT, class Traits>
    constexpr bool operator<=(basic_string_view<CharT, Traits> x,
                                 basic_string_view<CharT, Traits> y) noexcept;
    template<class CharT, class Traits>
    constexpr bool operator>=(basic_string_view<CharT, Traits> x,
                              basic_string_view<CharT, Traits> y) noexcept;
    // /* see description */, sufficient additional overloads of comparison functions

    // 7.10, Inserters and extractors
    template<class CharT, class Traits>
      basic_ostream<CharT, Traits>&
        operator<<(basic_ostream<CharT, Traits>& os,
                   basic_string_view<CharT, Traits> str);

    // basic_string_view typedef names
    typedef basic_string_view<char> string_view;
    typedef basic_string_view<char16_t> u16string_view;
    typedef basic_string_view<char32_t> u32string_view;
    typedef basic_string_view<wchar_t> wstring_view;

  }  // namespace fundamentals_v1
  }  // namespace experimental

  // 7.11, Hash support
  template <class T> struct hash;
  template <> struct hash<experimental::string_view>;
  template <> struct hash<experimental::u16string_view>;
  template <> struct hash<experimental::u32string_view>;
  template <> struct hash<experimental::wstring_view>;

}  // namespace std