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Experimental library header <experimental/string_view>

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Standard library headers
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
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>

此头文件是 Library Fundamentals TS 的组成部分（ v1 、 v2 ）。

目录

类

名称 描述
std::experimental::basic_string_view (library fundamentals TS) 表示字符序列引用的类模板 (类模板)
std::experimental::string_view (library fundamentals TS) std:: experimental :: basic_string_view < char > (类型别名)
std::experimental::wstring_view (library fundamentals TS) std:: experimental :: basic_string_view < wchar_t > (类型别名)
std::experimental::u16string_view (library fundamentals TS) std:: experimental :: basic_string_view < char16_t > (类型别名)
std::experimental::u32string_view (library fundamentals TS) std:: experimental :: basic_string_view < char32_t > (类型别名)
std:: hash < std:: experimental :: string_view > (library fundamentals TS) (类模板特化)
std:: hash < std:: experimental :: u16string_view > (library fundamentals TS) (类模板特化)
std:: hash < std:: experimental :: u32string_view > (library fundamentals TS) (类模板特化)
std:: hash < std:: experimental :: wstring_view > (library fundamentals TS) (类模板特化)

函数

按字典序比较两个视图
(函数模板)
输出
对视图执行流输出操作
(函数模板)

概要 

namespace std {
  namespace experimental {
  inline namespace fundamentals_v1 {
    // 7.2, 类模板 basic_string_view
    template<class CharT, class Traits = char_traits<CharT>>
        class basic_string_view;
    // 7.9, basic_string_view 非成员比较函数
    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;
    // /* 见描述 */, 比较函数的足够附加重载
    // 7.10, 插入器和提取器
    template<class CharT, class Traits>
      basic_ostream<CharT, Traits>&
        operator<<(basic_ostream<CharT, Traits>& os,
                   basic_string_view<CharT, Traits> str);
    // basic_string_view 类型定义名称
    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;
  }  // 命名空间 fundamentals_v1
  }  // 命名空间 experimental
  // 7.11, 哈希支持
  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>;
}  // 命名空间 std