From Jason Turner

[char.traits.specializations.wchar.t]

C++17 → C++20 2.6 KB 27 lines
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Archived: C++17 | C++20
Markdown: C++17 | C++20
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  1. tmp/tmpwehlnydz/{from.md → to.md} +7 -17
tmp/tmpwehlnydz/{from.md → to.md} RENAMED
@@ -6,43 +6,33 @@ namespace std {
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  using char_type = wchar_t;
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  using int_type = wint_t;
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  using off_type = streamoff;
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  using pos_type = wstreampos;
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  using state_type = mbstate_t;
 
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  static constexpr void assign(char_type& c1, const char_type& c2) noexcept;
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  static constexpr bool eq(char_type c1, char_type c2) noexcept;
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  static constexpr bool lt(char_type c1, char_type c2) noexcept;
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  static constexpr int compare(const char_type* s1, const char_type* s2, size_t n);
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  static constexpr size_t length(const char_type* s);
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  static constexpr const char_type* find(const char_type* s, size_t n,
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  const char_type& a);
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- static char_type* move(char_type* s1, const char_type* s2, size_t n);
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- static char_type* copy(char_type* s1, const char_type* s2, size_t n);
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- static char_type* assign(char_type* s, size_t n, char_type a);
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  static constexpr int_type not_eof(int_type c) noexcept;
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  static constexpr char_type to_char_type(int_type c) noexcept;
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  static constexpr int_type to_int_type(char_type c) noexcept;
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  static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept;
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  static constexpr int_type eof() noexcept;
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  };
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  }
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  ```
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- The defined types for `int_type`, `pos_type`, and `state_type` shall be
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- `wint_t`, `wstreampos`, and `mbstate_t` respectively.
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- The type `wstreampos` shall be an *implementation-defined* type that
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- satisfies the requirements for `pos_type` in  [[iostreams.limits.pos]]
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- and [[iostream.forward]].
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-
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- The type `mbstate_t` is defined in `<cwchar>` and can represent any of
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- the conversion states that can occur in an *implementation-defined* set
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- of supported multibyte character encoding rules.
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-
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- The two-argument members `assign`, `eq`, and `lt` shall be defined
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- identically to the built-in operators `=`, `==`, and `<` respectively.
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-
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- The member `eof()` shall return `WEOF`.
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  using char_type = wchar_t;
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  using int_type = wint_t;
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  using off_type = streamoff;
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  using pos_type = wstreampos;
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  using state_type = mbstate_t;
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+ using comparison_category = strong_ordering;
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  static constexpr void assign(char_type& c1, const char_type& c2) noexcept;
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  static constexpr bool eq(char_type c1, char_type c2) noexcept;
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  static constexpr bool lt(char_type c1, char_type c2) noexcept;
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  static constexpr int compare(const char_type* s1, const char_type* s2, size_t n);
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  static constexpr size_t length(const char_type* s);
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  static constexpr const char_type* find(const char_type* s, size_t n,
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  const char_type& a);
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+ static constexpr char_type* move(char_type* s1, const char_type* s2, size_t n);
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+ static constexpr char_type* copy(char_type* s1, const char_type* s2, size_t n);
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+ static constexpr char_type* assign(char_type* s, size_t n, char_type a);
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  static constexpr int_type not_eof(int_type c) noexcept;
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  static constexpr char_type to_char_type(int_type c) noexcept;
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  static constexpr int_type to_int_type(char_type c) noexcept;
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  static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept;
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  static constexpr int_type eof() noexcept;
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  };
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  }
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  ```
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+ The two-argument members `assign`, `eq`, and `lt` are defined
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+ identically to the built-in operators `=`, `==`, and `<`, respectively.
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+ The member `eof()` returns `WEOF`.
 
 
 
 
 
 
 
 
 
 
 
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