C++26対応として、標準ライブラリのnodiscard指定を削除 (close #1386)

Author: faithandbrave

reference/array/array/empty.md

@@ -9,6 +9,7 @@
 constexpr bool empty() noexcept;                     // C++11
 constexpr bool empty() const noexcept;               // C++14
 [[nodiscard]] constexpr bool empty() const noexcept; // C++20
+constexpr bool empty() const noexcept;               // C++26
 ```
 
 ## 概要
@@ -68,3 +69,6 @@ empty_array : true
 ## 参照
 - [N3669 Fixing constexpr member functions without const](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3669.pdf)
 - [P0600R1 `[[nodiscard]]` in the Library](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0600r1.pdf)
+    - C++20で`[[nodiscard]]`が付加された
+- [P2422R1 Remove `nodiscard` annotations from the standard library specification](https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2422r1.html)
+    - C++26で`[[nodiscard]]`指定が削除された

reference/barrier/barrier/arrive.md

@@ -6,7 +6,9 @@
 * cpp20[meta cpp]
 
 ```cpp
-[[nodiscard]] arrival_token arrive(ptrdiff_t update = 1);
+[[nodiscard]]
+arrival_token arrive(ptrdiff_t update = 1); // (1) C++20
+arrival_token arrive(ptrdiff_t update = 1); // (1) C++26
 ```
 * ptrdiff_t[link /reference/cstddef/ptrdiff_t.md]
 
@@ -121,3 +123,8 @@ main: phase-2
 - [`wait()`](wait.md)
 - [`arrive_and_wait()`](arrive_and_wait.md)
 - [`arrive_and_drop()`](arrive_and_drop.md)
+
+
+## 参照
+- [P2422R1 Remove `nodiscard` annotations from the standard library specification](https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2422r1.html)
+    - C++26で`[[nodiscard]]`指定が削除された

reference/bit/rotl.md

@@ -7,7 +7,10 @@
 ```cpp
 namespace std {
   template <class T>
-  [[nodiscard]] constexpr T rotl(T x, int s) noexcept;
+  [[nodiscard]]
+  constexpr T rotl(T x, int s) noexcept; // (1) C++20
+  template <class T>
+  constexpr T rotl(T x, int s) noexcept; // (1) C++26
 }
 ```
 
@@ -73,3 +76,5 @@ int main()
 
 ## 参照
 - [P0553R4 Bit operations](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p0553r4.html)
+- [P2422R1 Remove `nodiscard` annotations from the standard library specification](https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2422r1.html)
+    - C++26で`[[nodiscard]]`指定が削除された

reference/bit/rotr.md

@@ -7,7 +7,10 @@
 ```cpp
 namespace std {
   template <class T>
-  [[nodiscard]] constexpr T rotr(T x, int s) noexcept;
+  [[nodiscard]]
+  constexpr T rotr(T x, int s) noexcept; // (1) C++20
+  template <class T>
+  constexpr T rotr(T x, int s) noexcept; // (1) C++26
 }
 ```
 
@@ -73,3 +76,5 @@ int main()
 
 ## 参照
 - [P0553R4 Bit operations](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p0553r4.html)
+- [P2422R1 Remove `nodiscard` annotations from the standard library specification](https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2422r1.html)
+    - C++26で`[[nodiscard]]`指定が削除された

reference/deque/deque/empty.md

@@ -8,6 +8,7 @@
 bool empty() const;                        // C++03
 bool empty() const noexcept;               // C++11
 [[nodiscard]] bool empty() const noexcept; // C++20
+bool empty() const noexcept;               // C++26
 ```
 
 ## 概要
@@ -66,3 +67,6 @@ false
 
 ## 参照
 - [P0600R1 `[[nodiscard]]` in the Library](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0600r1.pdf)
+    - C++20で`[[nodiscard]]`が付加された
+- [P2422R1 Remove `nodiscard` annotations from the standard library specification](https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2422r1.html)
+    - C++26で`[[nodiscard]]`指定が削除された

reference/filesystem/path/empty.md

@@ -8,6 +8,7 @@
 ```cpp
 bool empty() const noexcept;               // C++17
 [[nodiscard]] bool empty() const noexcept; // C++20
+bool empty() const noexcept;               // C++26
 ```
 
 ## 概要
@@ -58,3 +59,6 @@ p2 : not empty
 
 ## 参照
 - [P0600R1 `[[nodiscard]]` in the Library](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0600r1.pdf)
+    - C++20で`[[nodiscard]]`が付加された
+- [P2422R1 Remove `nodiscard` annotations from the standard library specification](https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2422r1.html)
+    - C++26で`[[nodiscard]]`指定が削除された

reference/forward_list/forward_list/empty.md

@@ -8,6 +8,7 @@
 ```cpp
 bool empty() const noexcept;               // C++11
 [[nodiscard]] bool empty() const noexcept; // C++20
+bool empty() const noexcept;               // C++26
 ```
 
 ## 概要
@@ -68,3 +69,6 @@ false
 
 ## 参照
 - [P0600R1 `[[nodiscard]]` in the Library](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0600r1.pdf)
+    - C++20で`[[nodiscard]]`が付加された
+- [P2422R1 Remove `nodiscard` annotations from the standard library specification](https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2422r1.html)
+    - C++26で`[[nodiscard]]`指定が削除された

reference/future/async.md

@@ -9,41 +9,41 @@ namespace std {
   template <class F, class... Args>
   future<typename result_of<F(Args...)>::type>
     async(F&& f, Args&&... args);                // (1) C++11
-
   template <class F, class... Args>
   future<
     typename result_of<
       typename decay<F>::type(typename decay<Args>::type...)
     >::type
   > async(F&& f, Args&&... args);                // (1) C++14
-
   template <class F, class... Args>
   future<invoke_result_t<decay_t<F>, decay_t<Args>...>>
     async(F&& f, Args&&... args);                // (1) C++17
-
   template <class F, class... Args>
-  [[nodiscard]] future<invoke_result_t<decay_t<F>, decay_t<Args>...>>
+  [[nodiscard]]
+  future<invoke_result_t<decay_t<F>, decay_t<Args>...>>
     async(F&& f, Args&&... args);                // (1) C++20
+  future<invoke_result_t<decay_t<F>, decay_t<Args>...>>
+    async(F&& f, Args&&... args);                // (1) C++26
 
 
   template <class F, class... Args>
   future<typename result_of<F(Args...)>::type>
     async(launch policy, F&& f, Args&&... args); // (2) C++11
-
   template <class F, class... Args>
   future<
     typename result_of<
       typename decay<F>::type(typename decay<Args>::type...)
     >::type
   > async(launch policy, F&& f, Args&&... args); // (2) C++14
-
   template <class F, class... Args>
   future<invoke_result_t<decay_t<F>, decay_t<Args>...>>
     async(launch policy, F&& f, Args&&... args); // (2) C++17
-
   template <class F, class... Args>
-  [[nodiscard]] future<invoke_result_t<decay_t<F>, decay_t<Args>...>>
+  [[nodiscard]]
+  future<invoke_result_t<decay_t<F>, decay_t<Args>...>>
     async(launch policy, F&& f, Args&&... args); // (2) C++20
+  future<invoke_result_t<decay_t<F>, decay_t<Args>...>>
+    async(launch policy, F&& f, Args&&... args); // (2) C++26
 }
 ```
 * future[link future.md]
@@ -203,5 +203,8 @@ foo() = 3
 - [async関数launch::asyncポリシーとfutureのちょっと特殊な動作 - yohhoyの日記](https://yohhoy.hatenadiary.jp/entry/20120317/p1)
 - [P0604R0 Resolving GB 55, US 84, US 85, US 86](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0604r0.html)
 - [P0600R1 `[[nodiscard]]` in the Library, Rev1](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0600r1.pdf)
+    - C++20で`[[nodiscard]]`が付加された
 - [In Visual Studio, `thread_local` variables' destructor not called when used with `std::async`, is this a bug? - stackoverflow](https://stackoverflow.com/questions/50897768/in-visual-studio-thread-local-variables-destructor-not-called-when-used-with)
 - [&lt;future&gt; functions - Microsoft Docs](https://docs.microsoft.com/en-us/cpp/standard-library/future-functions?view=vs-2019#remarks)
+- [P2422R1 Remove `nodiscard` annotations from the standard library specification](https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2422r1.html)
+    - C++26で`[[nodiscard]]`指定が削除された

reference/iterator/empty.md

@@ -8,21 +8,24 @@
 namespace std {
   template <class C>
   constexpr auto empty(const C& c) -> decltype(c.empty());               // (1) C++17
-
   template <class C>
   [[nodiscard]] constexpr auto empty(const C& c) -> decltype(c.empty()); // (1) C++20
+  template <class C>
+  constexpr auto empty(const C& c) -> decltype(c.empty());               // (1) C++26
 
   template <class T, std::size_t N>
   constexpr bool empty(const T (&array)[N]) noexcept;                    // (2) C++17
-
   template <class T, std::size_t N>
   [[nodiscard]] constexpr bool empty(const T (&array)[N]) noexcept;      // (2) C++20
+  template <class T, std::size_t N>
+  constexpr bool empty(const T (&array)[N]) noexcept;                    // (2) C++26
 
   template <class E>
   constexpr bool empty(initializer_list<E> il) noexcept;                 // (3) C++17
-
   template <class E>
   [[nodiscard]] constexpr bool empty(initializer_list<E> il) noexcept;   // (3) C++20
+  template <class E>
+  constexpr bool empty(initializer_list<E> il) noexcept;                 // (3) C++26
 }
 ```
 * initializer_list[link /reference/initializer_list/initializer_list.md]
@@ -102,4 +105,7 @@ false
 - [`boost::empty()` - Boost Range Library](http://www.boost.org/doc/libs/release/libs/range/doc/html/range/reference/concept_implementation/semantics/functions.html)
 - [N4280: Non-member `empty()` and more (Revision 2)](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4280.pdf)
 - [P0600R1: `[[nodiscard]]` in the library](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0600r1.pdf)
+    - C++20で`[[nodiscard]]`が付加された
 - [LWG Issue 3009. Including `<string_view>` doesn't provide `std::size/empty/data`](https://wg21.cmeerw.net/lwg/issue3009)
+- [P2422R1 Remove `nodiscard` annotations from the standard library specification](https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2422r1.html)
+    - C++26で`[[nodiscard]]`指定が削除された

reference/list/list/empty.md

@@ -8,6 +8,7 @@
 bool empty() const;                        // C++03
 bool empty() const noexcept;               // C++11
 [[nodiscard]] bool empty() const noexcept; // C++20
+bool empty() const noexcept;               // C++26
 ```
 
 ## 概要
@@ -57,3 +58,6 @@ false
 
 ## 参照
 - [P0600R1 `[[nodiscard]]` in the Library](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0600r1.pdf)
+    - C++20で`[[nodiscard]]`が付加された
+- [P2422R1 Remove `nodiscard` annotations from the standard library specification](https://open-std.org/jtc1/sc22/wg21/docs/papers/2024/p2422r1.html)
+    - C++26で`[[nodiscard]]`指定が削除された