22.2.1 Header <utility> synopsis [utility.syn] C++N4910:2022 (520) p663.cpp

# はじめに(Introduction)

N4910  Working Draft, Standard for Programming Language C++

http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/n4910.pdf

n4910は、ISO/IEC JTC1 SC22 WG21の作業原案(Working Draft)です。
公式のISO/IEC 14882原本ではありません。
ISO/IEC JTC1 SC22 WG21では、可能な限り作業文書を公開し、幅広い意見を求めています。
一連の記事はコード断片をコンパイルできる形にする方法を検討してコンパイル、リンク、実行して、規格案の原文と処理系(g++, Clang++)との違いを確認し、技術内容を検討し、ISO/IEC JTC1 SC22 WG21にフィードバックするために用います。
また、CERT C++, MISRA C++等のコーディング標準のコード断片をコンパイルする際の参考にさせていただこうと考えています。CERT C++, MISRA C++が標準化の動きとの時間的なずれがあれば確認できれば幸いです。また、boostライブラリとの関連、Linux OS, TOPPERSカーネル、g++(GCC), clang++(LLVM）との関係も調査中です。
何か、抜け漏れ、耳より情報がありましたらおしらせくださると幸いです。

 <この項は書きかけです。順次追記します。>

## 背景(back ground)
C/C++でコンパイルエラーが出ると、途方にくれることがしばしばあります。
何回かに１回は、該当するエラーが検索できます。
ただ、条件が違っていて、そこでの修正方法では目的を達成しないこともしばしばです。いろいろな条件のコンパイルエラーとその対応方法について、広く記録することによって、いつか同じエラーに遭遇した時にやくに立つことを目指しています。

この半年の間で、三度、自分のネットでの記録に助けられたことがあります。
また過去に解決できなかった記録を１０種類以上、最近になって解決できたことがあります。それは、主に次の３つの情報に基づいています。

https://stackoverflow.com
https://cpprefjp.github.io
http://ja.cppreference.com/

また
https://researchmap.jp/joub9b3my-1797580/#_1797580
に記載したサイトのお世話になっています。

## 作業方針(sequence)
Clang++では-std=c++03, C++2bの2種類
g++では-std=c++03, c++2bの２種類
でコンパイルし、

１）コンパイルエラーを収集する。
２）コンパイルエラーをなくす方法を検討する。
コンパイルエラーになる例を示すだけが目的のコードは、コンパイルエラーをなくすのではなく、コンパイルエラーの種類を収集するだけにする。
文法を示すのが目的のコード場合に、コンパイルエラーをなくすのに手間がかかる場合は、順次作業します。
３）リンクエラーをなくす方法を検討する。
文法を示すのが目的のコード場合に、リンクエラーをなくすのに手間がかかる場合は、順次作業します。
４）意味のある出力を作る。
コンパイル、リンクが通っても、意味のある出力を示そうとすると、コンパイル・リンクエラーが出て収拾できそうにない場合がある。順次作業します。

１）だけのものから４）まで進んだものと色々ある状態です。一歩でも前に進むご助言をお待ちしています。「検討事項」の欄に現状を記録するようにしています。

### C++N4910:2022 Standard Working Draft on ISO/IEC 14882(0) sample code compile list  

https://qiita.com/kaizen_nagoya/items/fc957ddddd402004bb91

### C++N4741, 2018 Standard Working Draft on ISO/IEC 14882 sample code compile list
https://qiita.com/kaizen_nagoya/items/3294c014044550896010

### C++N4606, 2016符号断片編纂一覧(example code compile list)
C++N4606, 2016 Working Draft 2016, ISO/IEC 14882, C++ standard(1) Example code compile list
https://qiita.com/kaizen_nagoya/items/df5d62c35bd6ed1c3d43/

### C++N3242, 2011 sample code compile list on clang++ and g++
https://qiita.com/kaizen_nagoya/items/685b5c1a2c17c1bf1318

## 編纂器(Compiler)
### clang++ --version
> Debian clang version 14.0.5-++20220610033153+c12386ae247c-1~exp1~20220610153237.151
Target: x86_64-pc-linux-gnu, Thread model: posix, InstalledDir: /usr/bin

### g++- --version
> g++ (GCC) 12.1.0  Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

# 22.2.1 Header <utility> synopsis [utility.syn] C++N4910:2022 (520) p663.cpp

## 算譜(source code)

```c++:p663.cpp
// C++N4910 Committee Draft, Standard for Programming Language C++
// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/n4910.pdf
const char * n4910 = "22.2.1 Header <utility> synopsis [utility.syn] C++N4910:2022 (520) p663.cpp";
// Debian clang version 14.0.5-++20220610033153+c12386ae247c-
// g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc.
// Edited by Dr. OGAWA Kiyoshi. Compile procedure and results record.
// C++N4910:2022 Standard Working Draft on ISO/IEC 14882(0) sample code compile list
// https://qiita.com/kaizen_nagoya/items/fc957ddddd402004bb91

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cassert>
#include <coroutine>
#include <vector>
#include <complex>
#include <map>
#include <atomic>
#include <unordered_map>
#include <memory>
#include <typeinfo>

using namespace std;

#define see_below int
// Example 1
#include <compare>
#include <initializer_list>
namespace std {
// 22.2.2, swap
template<class T>
// see 17.11.1 // see 17.10.2
constexpr void swap(T& a, T& b) noexcept(see_below);
template<class T, size_t N>
constexpr void swap(T (&a)[N], T (&b)[N]) noexcept(is_nothrow_swappable_v<T>);
// 22.2.3, exchange
template<class T, class U = T>
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
// 22.2.4, forward/move
template<class T>
constexpr T&& forward(remove_reference_t<T>& t) noexcept;
template<class T>
constexpr T&& forward(remove_reference_t<T>&& t) noexcept;
template<class T>
constexpr remove_reference_t<T>&& move(T&&) noexcept;
template<class T>
constexpr conditional_t<
!is_nothrow_move_constructible_v<T> && is_copy_constructible_v<T>, const T&, T&&>
move_if_noexcept(T& x) noexcept;
// 22.2.5, as_const
template<class T>
constexpr add_const_t<T>& as_const(T& t) noexcept;
template<class T>
void as_const(const T&&) = delete;
// 22.2.6, declval
template<class T>
add_rvalue_reference_t<T> declval() noexcept;
// 22.2.7, integer comparison functions
template<class T, class U>
constexpr bool cmp_equal(T t, U u) noexcept;
template<class T, class U>
// as unevaluated operand
constexpr bool cmp_not_equal(T t, U u) noexcept;
template<class T, class U>
constexpr bool cmp_less(T t, U u) noexcept;
template<class T, class U>
constexpr bool cmp_greater(T t, U u) noexcept;
template<class T, class U>
constexpr bool cmp_less_equal(T t, U u) noexcept;
template<class T, class U>
constexpr bool cmp_greater_equal(T t, U u) noexcept;
template<class R, class T>
constexpr bool in_range(T t) noexcept;
// 22.2.8, to_underlying
template<class T>
constexpr underlying_type_t<T> to_underlying(T value) noexcept;
// 22.2.9, unreachable
[[noreturn]] void unreachable();
// 21.2, compile-time integer sequences
template<class T, T...>
struct integer_sequence;
template<size_t... I>
using index_sequence = integer_sequence<size_t, I...>;
template<class T, T N>
using make_integer_sequence = integer_sequence<T, see_below>;
template<size_t N>
using make_index_sequence = make_integer_sequence<size_t, N>;
template<class... T>
using index_sequence_for = make_index_sequence<sizeof...(T)>;
// 22.3, class template pair
template<class T1, class T2>
struct pair;
template<class T1, class T2, class U1, class U2,
         template<class> class TQual, template<class> class UQual>
requires requires { typename pair<common_reference_t<TQual<T1>, UQual<U1>>,
             common_reference_t<TQual<T2>, UQual<U2>>>;
}
struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual> {
    using type = pair<common_reference_t<TQual<T1>, UQual<U1>>,
          common_reference_t<TQual<T2>, UQual<U2>>>;
};
template<class T1, class T2, class U1, class U2>
requires requires { typename pair<common_type_t<T1, U1>, common_type_t<T2, U2>>; }
struct common_type<pair<T1, T2>, pair<U1, U2>> {
    using type = pair<common_type_t<T1, U1>, common_type_t<T2, U2>>;
};
// 22.3.3, pair specialized algorithms
template<class T1, class T2>
constexpr bool operator==(const pair<T1, T2>&, const pair<T1, T2>&);
template<class T1, class T2>
constexpr common_comparison_category_t<synth_three_way_result<T1>, synth_three_way_result <T2>>
        operator<=>(const pair<T1, T2>&, const pair<T1, T2>&);
template<class T1, class T2>
constexpr void swap(pair<T1, T2>& x, pair<T1, T2>& y) noexcept(noexcept(x.swap(y)));
template<class T1, class T2>
constexpr void swap(const pair<T1, T2>& x, const pair<T1, T2>& y)
noexcept(noexcept(x.swap(y)));
template<class T1, class T2>
constexpr see_below make_pair(T1&&, T2&&);
// 22.3.4, tuple-like access to pair
template<class T> struct tuple_size;
template<size_t I, class T> struct tuple_element;
template<class T1, class T2> struct tuple_size<pair<T1, T2>>;
template<size_t I, class T1, class T2> struct tuple_element<I, pair<T1, T2>>;
template<size_t I, class T1, class T2>
constexpr tuple_element_t<I, pair<T1, T2>>& get(pair<T1, T2>&) noexcept;
template<size_t I, class T1, class T2>
constexpr tuple_element_t<I, pair<T1, T2>>&& get(pair<T1, T2>&&) noexcept;
template<size_t I, class T1, class T2>
constexpr const tuple_element_t<I, pair<T1, T2>>& get(const pair<T1, T2>&) noexcept;
template<size_t I, class T1, class T2>
constexpr const tuple_element_t<I, pair<T1, T2>>&& get(const pair<T1, T2>&&) noexcept;
template<class T1, class T2>
constexpr T1& get(pair<T1, T2>& p) noexcept;
template<class T1, class T2>
constexpr const T1& get(const pair<T1, T2>& p) noexcept;
template<class T1, class T2>
constexpr T1&& get(pair<T1, T2>&& p) noexcept;
template<class T1, class T2>
constexpr const T1&& get(const pair<T1, T2>&& p) noexcept;
template<class T2, class T1>
constexpr T2& get(pair<T1, T2>& p) noexcept;
template<class T2, class T1>
constexpr const T2& get(const pair<T1, T2>& p) noexcept;
template<class T2, class T1>
constexpr T2&& get(pair<T1, T2>&& p) noexcept;
template<class T2, class T1>
constexpr const T2&& get(const pair<T1, T2>&& p) noexcept;
// 22.3.5, pair piecewise construction
struct piecewise_construct_t {
    explicit piecewise_construct_t() = default;
};
inline constexpr piecewise_construct_t piecewise_construct{};
template<class... Types> class tuple;
// in-place construction
struct in_place_t {
    explicit in_place_t() = default;
};
// defined in <tuple> (22.4.2)
inline constexpr in_place_t in_place{};
template<class T>
struct in_place_type_t {
    explicit in_place_type_t() = default;
};
template<class T> inline constexpr in_place_type_t<T> in_place_type{};
template<size_t I>
struct in_place_index_t {
    explicit in_place_index_t() = default;
};
template<size_t I> inline constexpr in_place_index_t<I> in_place_index{};
}
int main() {
    cout  <<  n4910 << endl;
    return EXIT_SUCCESS;
}
```

## 編纂・実行結果(compile and go)

```ubuntu:bash
$ clang++ p663.cpp -std=03 -o p663l -I. -Wall
In file included from p663.cpp:19:
In file included from /usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/atomic:38:
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/c++0x_warning.h:32:2: error: This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
#error This file requires compiler and library support \
 ^
p663.cpp:34:1: error: unknown type name 'constexpr'
constexpr void swap(T& a, T& b) noexcept(see_below); template<class T, size_t N>
^
p663.cpp:34:32: error: expected ';' at end of declaration
constexpr void swap(T& a, T& b) noexcept(see_below); template<class T, size_t N>
                               ^
                               ;
p663.cpp:34:33: error: C++ requires a type specifier for all declarations
constexpr void swap(T& a, T& b) noexcept(see_below); template<class T, size_t N>
                                ^
p663.cpp:35:3: error: unknown type name 'constexpr'
  constexpr void swap(T (&a)[N], T (&b)[N]) noexcept(is_nothrow_swappable_v<T>);
  ^
p663.cpp:35:44: error: expected ';' at end of declaration
  constexpr void swap(T (&a)[N], T (&b)[N]) noexcept(is_nothrow_swappable_v<T>);
                                           ^
                                           ;
p663.cpp:35:77: error: use of undeclared identifier 'T'
  constexpr void swap(T (&a)[N], T (&b)[N]) noexcept(is_nothrow_swappable_v<T>);
                                                                            ^
p663.cpp:35:45: error: C++ requires a type specifier for all declarations
  constexpr void swap(T (&a)[N], T (&b)[N]) noexcept(is_nothrow_swappable_v<T>);
                                            ^
p663.cpp:38:1: error: unknown type name 'constexpr'
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
^
p663.cpp:38:11: warning: variable templates are a C++14 extension [-Wc++14-extensions]
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
          ^
p663.cpp:38:12: error: expected ';' at end of declaration
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
           ^
           ;
p663.cpp:38:13: error: C++ requires a type specifier for all declarations
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
            ^
p663.cpp:38:25: error: use of undeclared identifier 'obj'
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
                        ^
p663.cpp:38:30: error: use of undeclared identifier 'U'
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
                             ^
p663.cpp:38:34: error: use of undeclared identifier 'new_val'
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
                                 ^
p663.cpp:38:42: error: expected ';' after top level declarator
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
                                         ^
                                         ;
p663.cpp:41:3: error: unknown type name 'constexpr'
  constexpr T&& forward(remove_reference_t<T>& t) noexcept;
  ^
p663.cpp:41:13: warning: variable templates are a C++14 extension [-Wc++14-extensions]
  constexpr T&& forward(remove_reference_t<T>& t) noexcept;
            ^
p663.cpp:41:14: error: expected ';' at end of declaration
  constexpr T&& forward(remove_reference_t<T>& t) noexcept;
             ^
             ;
p663.cpp:41:14: warning: rvalue references are a C++11 extension [-Wc++11-extensions]
p663.cpp:41:51: error: expected function body after function declarator
  constexpr T&& forward(remove_reference_t<T>& t) noexcept;
                                                  ^
p663.cpp:43:3: error: unknown type name 'constexpr'
  constexpr T&& forward(remove_reference_t<T>&& t) noexcept;
  ^
p663.cpp:43:13: warning: variable templates are a C++14 extension [-Wc++14-extensions]
  constexpr T&& forward(remove_reference_t<T>&& t) noexcept;
            ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
4 warnings and 20 errors generated.
$ clang++ p663.cpp -std=2b -o p663l -I. -Wall
p663.cpp:34:51: error: expected '(' for function-style cast or type construction
constexpr void swap(T& a, T& b) noexcept(see_below); template<class T, size_t N>
                                         ~~~~~~~~~^
p663.cpp:38:61: error: expected '(' for function-style cast or type construction
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
                                                   ~~~~~~~~~^
p663.cpp:38:13: error: exception specification in declaration does not match previous declaration
constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
            ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/utility:291:5: note: previous declaration is here
    exchange(_Tp& __obj, _Up&& __new_val)
    ^
p663.cpp:54:8: error: redefinition of 'as_const'
  void as_const(const T&&) = delete;
       ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/utility:398:10: note: previous definition is here
    void as_const(const _Tp&&) = delete;
         ^
p663.cpp:85:51: error: template argument for non-type template parameter must be an expression
using make_integer_sequence = integer_sequence<T, see_below>;
                                                  ^~~~~~~~~
p663.cpp:26:19: note: expanded from macro 'see_below'
#define see_below int
                  ^~~
p663.cpp:80:23: note: template parameter is declared here
template<class T, T...>
                      ^
p663.cpp:110:40: error: use of undeclared identifier 'synth_three_way_result'
constexpr common_comparison_category_t<synth_three_way_result<T1>, synth_three_way_result <T2>>
                                       ^
p663.cpp:110:95: error: expected unqualified-id
constexpr common_comparison_category_t<synth_three_way_result<T1>, synth_three_way_result <T2>>
                                                                                              ^
p663.cpp:148:8: error: redefinition of 'piecewise_construct_t'
struct piecewise_construct_t {
       ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_pair.h:80:10: note: previous definition is here
  struct piecewise_construct_t { explicit piecewise_construct_t() = default; };
         ^
p663.cpp:151:40: error: redefinition of 'piecewise_construct'
inline constexpr piecewise_construct_t piecewise_construct{};
                                       ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_pair.h:83:53: note: previous definition is here
  _GLIBCXX17_INLINE constexpr piecewise_construct_t piecewise_construct =
                                                    ^
p663.cpp:154:8: error: redefinition of 'in_place_t'
struct in_place_t {
       ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/utility:358:10: note: previous definition is here
  struct in_place_t {
         ^
p663.cpp:158:33: error: redefinition of 'in_place'
    inline constexpr in_place_t in_place{};
                                ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/utility:362:31: note: previous definition is here
  inline constexpr in_place_t in_place{};
                              ^
p663.cpp:160:14: error: redefinition of 'in_place_type_t'
      struct in_place_type_t {
             ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/utility:364:33: note: previous definition is here
  template<typename _Tp> struct in_place_type_t
                                ^
p663.cpp:163:59: error: redefinition of 'in_place_type'
    template<class T> inline constexpr in_place_type_t<T> in_place_type{};
                                                          ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/utility:370:43: note: previous definition is here
    inline constexpr in_place_type_t<_Tp> in_place_type{};
                                          ^
p663.cpp:165:14: error: redefinition of 'in_place_index_t'
      struct in_place_index_t {
             ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/utility:372:32: note: previous definition is here
  template<size_t _Idx> struct in_place_index_t
                               ^
p663.cpp:168:61: error: redefinition of 'in_place_index'
    template<size_t I> inline constexpr in_place_index_t<I> in_place_index{};
                                                            ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/utility:378:45: note: previous definition is here
    inline constexpr in_place_index_t<_Idx> in_place_index{};
                                            ^
15 errors generated.

$ g++ p663.cpp -std=03 -o p663g -I. -Wall
In file included from /usr/local/include/c++/12.1.0/atomic:38,
                 from p663.cpp:19:
/usr/local/include/c++/12.1.0/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
   32 | #error This file requires compiler and library support \
      |  ^~~~~
p663.cpp:34:1: warning: identifier 'constexpr' is a keyword in C++11 [-Wc++11-compat]
   34 | constexpr void swap(T& a, T& b) noexcept(see_below); template<class T, size_t N>
      | ^~~~~~~~~
p663.cpp:34:33: warning: identifier 'noexcept' is a keyword in C++11 [-Wc++11-compat]
   34 | constexpr void swap(T& a, T& b) noexcept(see_below); template<class T, size_t N>
      |                                 ^~~~~~~~
p663.cpp:34:1: error: 'constexpr' does not name a type
   34 | constexpr void swap(T& a, T& b) noexcept(see_below); template<class T, size_t N>
      | ^~~~~~~~~
p663.cpp:34:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:35:3: error: 'constexpr' does not name a type
   35 |   constexpr void swap(T (&a)[N], T (&b)[N]) noexcept(is_nothrow_swappable_v<T>);
      |   ^~~~~~~~~
p663.cpp:35:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:38:1: error: 'constexpr' does not name a type
   38 | constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
      | ^~~~~~~~~
p663.cpp:38:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:41:3: error: 'constexpr' does not name a type
   41 |   constexpr T&& forward(remove_reference_t<T>& t) noexcept;
      |   ^~~~~~~~~
p663.cpp:41:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:43:3: error: 'constexpr' does not name a type
   43 |   constexpr T&& forward(remove_reference_t<T>&& t) noexcept;
      |   ^~~~~~~~~
p663.cpp:43:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:45:3: error: 'constexpr' does not name a type
   45 |   constexpr remove_reference_t<T>&& move(T&&) noexcept;
      |   ^~~~~~~~~
p663.cpp:45:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:47:3: error: 'constexpr' does not name a type
   47 |   constexpr conditional_t<
      |   ^~~~~~~~~
p663.cpp:47:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:52:3: error: 'constexpr' does not name a type
   52 |   constexpr add_const_t<T>& as_const(T& t) noexcept;
      |   ^~~~~~~~~
p663.cpp:52:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:54:24: error: expected ',' or '...' before '&&' token
   54 |   void as_const(const T&&) = delete;
      |                        ^~
p663.cpp:54:30: warning: defaulted and deleted functions only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
   54 |   void as_const(const T&&) = delete;
      |                              ^~~~~~
p663.cpp:57:3: error: 'add_rvalue_reference_t' does not name a type
   57 |   add_rvalue_reference_t<T> declval() noexcept;
      |   ^~~~~~~~~~~~~~~~~~~~~~
p663.cpp:60:3: error: 'constexpr' does not name a type
   60 |   constexpr bool cmp_equal(T t, U u) noexcept;
      |   ^~~~~~~~~
p663.cpp:60:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:63:3: error: 'constexpr' does not name a type
   63 |   constexpr bool cmp_not_equal(T t, U u) noexcept;
      |   ^~~~~~~~~
p663.cpp:63:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:65:3: error: 'constexpr' does not name a type
   65 |   constexpr bool cmp_less(T t, U u) noexcept;
      |   ^~~~~~~~~
p663.cpp:65:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:67:3: error: 'constexpr' does not name a type
   67 |   constexpr bool cmp_greater(T t, U u) noexcept;
      |   ^~~~~~~~~
p663.cpp:67:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:69:3: error: 'constexpr' does not name a type
   69 |   constexpr bool cmp_less_equal(T t, U u) noexcept;
      |   ^~~~~~~~~
p663.cpp:69:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:71:3: error: 'constexpr' does not name a type
   71 |   constexpr bool cmp_greater_equal(T t, U u) noexcept;
      |   ^~~~~~~~~
p663.cpp:71:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:73:3: error: 'constexpr' does not name a type
   73 |   constexpr bool in_range(T t) noexcept;
      |   ^~~~~~~~~
p663.cpp:73:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:76:3: error: 'constexpr' does not name a type
   76 |   constexpr underlying_type_t<T> to_underlying(T value) noexcept;
      |   ^~~~~~~~~
p663.cpp:76:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:78:1: error: expected unqualified-id before '[' token
   78 | [[noreturn]] void unreachable();
      | ^
p663.cpp:80:20: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
   80 | template<class T, T...>
      |                    ^~~
p663.cpp:82:20: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
   82 | template<size_t... I>
      |                    ^
p663.cpp:83:3: error: expected unqualified-id before 'using'
   83 |   using index_sequence = integer_sequence<size_t, I...>;
      |   ^~~~~
p663.cpp:85:1: error: expected unqualified-id before 'using'
   85 | using make_integer_sequence = integer_sequence<T, see_below>;
      | ^~~~~
p663.cpp:87:3: error: expected unqualified-id before 'using'
   87 |   using make_index_sequence = make_integer_sequence<size_t, N>;
      |   ^~~~~
p663.cpp:88:15: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
   88 | template<class... T>
      |               ^~~
p663.cpp:89:3: error: expected unqualified-id before 'using'
   89 |   using index_sequence_for = make_index_sequence<sizeof...(T)>;
      |   ^~~~~
p663.cpp:95:3: error: 'requires' does not name a type
   95 |   requires requires { typename pair<common_reference_t<TQual<T1>, UQual<U1>>,
      |   ^~~~~~~~
p663.cpp:95:3: note: 'requires' only available with '-std=c++20' or '-fconcepts'
p663.cpp:97:8: error: 'basic_common_reference' is not a class template
   97 | struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual> {
      |        ^~~~~~~~~~~~~~~~~~~~~~
p663.cpp:97:36: error: 'T1' was not declared in this scope; did you mean 'y1'?
   97 | struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual> {
      |                                    ^~
      |                                    y1
p663.cpp:97:40: error: 'T2' was not declared in this scope
   97 | struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual> {
      |                                        ^~
p663.cpp:97:42: error: template argument 1 is invalid
   97 | struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual> {
      |                                          ^
p663.cpp:97:42: error: template argument 2 is invalid
p663.cpp:97:50: error: 'U1' was not declared in this scope; did you mean 'y1'?
   97 | struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual> {
      |                                                  ^~
      |                                                  y1
p663.cpp:97:54: error: 'U2' was not declared in this scope
   97 | struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual> {
      |                                                      ^~
p663.cpp:97:56: error: template argument 1 is invalid
   97 | struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual> {
      |                                                        ^
p663.cpp:97:56: error: template argument 2 is invalid
p663.cpp:97:59: error: 'TQual' was not declared in this scope
   97 | struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual> {
      |                                                           ^~~~~
p663.cpp:97:66: error: 'UQual' was not declared in this scope
   97 | struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual> {
      |                                                                  ^~~~~
p663.cpp:98:9: error: expected nested-name-specifier before 'type'
   98 |   using type = pair<common_reference_t<TQual<T1>, UQual<U1>>,
      |         ^~~~
p663.cpp:102:3: error: 'requires' does not name a type
  102 |   requires requires { typename pair<common_type_t<T1, U1>, common_type_t<T2, U2>>; }
      |   ^~~~~~~~
p663.cpp:102:3: note: 'requires' only available with '-std=c++20' or '-fconcepts'
p663.cpp:103:8: error: 'common_type' is not a class template
  103 | struct common_type<pair<T1, T2>, pair<U1, U2>> {
      |        ^~~~~~~~~~~
p663.cpp:103:25: error: 'T1' was not declared in this scope; did you mean 'y1'?
  103 | struct common_type<pair<T1, T2>, pair<U1, U2>> {
      |                         ^~
      |                         y1
p663.cpp:103:29: error: 'T2' was not declared in this scope
  103 | struct common_type<pair<T1, T2>, pair<U1, U2>> {
      |                             ^~
p663.cpp:103:31: error: template argument 1 is invalid
  103 | struct common_type<pair<T1, T2>, pair<U1, U2>> {
      |                               ^
p663.cpp:103:31: error: template argument 2 is invalid
p663.cpp:103:39: error: 'U1' was not declared in this scope; did you mean 'y1'?
  103 | struct common_type<pair<T1, T2>, pair<U1, U2>> {
      |                                       ^~
      |                                       y1
p663.cpp:103:43: error: 'U2' was not declared in this scope
  103 | struct common_type<pair<T1, T2>, pair<U1, U2>> {
      |                                           ^~
p663.cpp:103:45: warning: '>>' operator is treated as two right angle brackets in C++11 [-Wc++11-compat]
  103 | struct common_type<pair<T1, T2>, pair<U1, U2>> {
      |                                             ^~
p663.cpp:103:45: note: suggest parentheses around '>>' expression
p663.cpp:103:45: error: template argument 1 is invalid
p663.cpp:103:45: error: template argument 2 is invalid
p663.cpp:103:48: warning: extended initializer lists only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
  103 | struct common_type<pair<T1, T2>, pair<U1, U2>> {
      |                                                ^
p663.cpp:104:9: error: expected nested-name-specifier before 'type'
  104 |   using type = pair<common_type_t<T1, U1>, common_type_t<T2, U2>>;
      |         ^~~~
p663.cpp:108:3: error: 'constexpr' does not name a type
  108 |   constexpr bool operator==(const pair<T1, T2>&, const pair<T1, T2>&);
      |   ^~~~~~~~~
p663.cpp:108:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:110:1: error: 'constexpr' does not name a type
  110 | constexpr common_comparison_category_t<synth_three_way_result<T1>, synth_three_way_result <T2>>
      | ^~~~~~~~~
p663.cpp:110:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:113:3: error: 'constexpr' does not name a type
  113 |   constexpr void swap(pair<T1, T2>& x, pair<T1, T2>& y) noexcept(noexcept(x.swap(y)));
      |   ^~~~~~~~~
p663.cpp:113:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:115:3: error: 'constexpr' does not name a type
  115 |   constexpr void swap(const pair<T1, T2>& x, const pair<T1, T2>& y)
      |   ^~~~~~~~~
p663.cpp:115:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:118:1: error: 'constexpr' does not name a type
  118 | constexpr see_below make_pair(T1&&, T2&&);
      | ^~~~~~~~~
p663.cpp:118:1: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:121:59: error: '>>' should be '> >' within a nested template argument list
  121 | template<class T1, class T2> struct tuple_size<pair<T1, T2>>;
      |                                                           ^~
      |                                                           > >
p663.cpp:122:75: error: '>>' should be '> >' within a nested template argument list
  122 | template<size_t I, class T1, class T2> struct tuple_element<I, pair<T1, T2>>;
      |                                                                           ^~
      |                                                                           > >
p663.cpp:124:3: error: 'constexpr' does not name a type
  124 |   constexpr tuple_element_t<I, pair<T1, T2>>& get(pair<T1, T2>&) noexcept;
      |   ^~~~~~~~~
p663.cpp:124:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:126:3: error: 'constexpr' does not name a type
  126 |   constexpr tuple_element_t<I, pair<T1, T2>>&& get(pair<T1, T2>&&) noexcept;
      |   ^~~~~~~~~
p663.cpp:126:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:128:3: error: 'constexpr' does not name a type
  128 |   constexpr const tuple_element_t<I, pair<T1, T2>>& get(const pair<T1, T2>&) noexcept;
      |   ^~~~~~~~~
p663.cpp:128:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:130:3: error: 'constexpr' does not name a type
  130 |   constexpr const tuple_element_t<I, pair<T1, T2>>&& get(const pair<T1, T2>&&) noexcept;
      |   ^~~~~~~~~
p663.cpp:130:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:132:3: error: 'constexpr' does not name a type
  132 |   constexpr T1& get(pair<T1, T2>& p) noexcept;
      |   ^~~~~~~~~
p663.cpp:132:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:134:3: error: 'constexpr' does not name a type
  134 |   constexpr const T1& get(const pair<T1, T2>& p) noexcept;
      |   ^~~~~~~~~
p663.cpp:134:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:136:3: error: 'constexpr' does not name a type
  136 |   constexpr T1&& get(pair<T1, T2>&& p) noexcept;
      |   ^~~~~~~~~
p663.cpp:136:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:138:3: error: 'constexpr' does not name a type
  138 |   constexpr const T1&& get(const pair<T1, T2>&& p) noexcept;
      |   ^~~~~~~~~
p663.cpp:138:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:140:3: error: 'constexpr' does not name a type
  140 |   constexpr T2& get(pair<T1, T2>& p) noexcept;
      |   ^~~~~~~~~
p663.cpp:140:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:142:3: error: 'constexpr' does not name a type
  142 |   constexpr const T2& get(const pair<T1, T2>& p) noexcept;
      |   ^~~~~~~~~
p663.cpp:142:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:144:3: error: 'constexpr' does not name a type
  144 |   constexpr T2&& get(pair<T1, T2>&& p) noexcept;
      |   ^~~~~~~~~
p663.cpp:144:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:146:3: error: 'constexpr' does not name a type
  146 |   constexpr const T2&& get(const pair<T1, T2>&& p) noexcept;
      |   ^~~~~~~~~
p663.cpp:146:3: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:149:38: warning: defaulted and deleted functions only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
  149 |   explicit piecewise_construct_t() = default;
      |                                      ^~~~~~~
p663.cpp:151:8: error: 'constexpr' does not name a type
  151 | inline constexpr piecewise_construct_t piecewise_construct{};
      |        ^~~~~~~~~
p663.cpp:151:8: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:152:15: warning: variadic templates only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
  152 | template<class... Types> class tuple;
      |               ^~~
p663.cpp:155:27: warning: defaulted and deleted functions only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
  155 |   explicit in_place_t() = default;
      |                           ^~~~~~~
p663.cpp:158:12: error: 'constexpr' does not name a type
  158 |     inline constexpr in_place_t in_place{};
      |            ^~~~~~~~~
p663.cpp:158:12: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:161:38: warning: defaulted and deleted functions only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
  161 |         explicit in_place_type_t() = default;
      |                                      ^~~~~~~
p663.cpp:163:30: error: 'constexpr' does not name a type
  163 |     template<class T> inline constexpr in_place_type_t<T> in_place_type{};
      |                              ^~~~~~~~~
p663.cpp:163:30: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'
p663.cpp:166:39: warning: defaulted and deleted functions only available with '-std=c++11' or '-std=gnu++11' [-Wc++11-extensions]
  166 |         explicit in_place_index_t() = default;
      |                                       ^~~~~~~
p663.cpp:168:31: error: 'constexpr' does not name a type
  168 |     template<size_t I> inline constexpr in_place_index_t<I> in_place_index{};
      |                               ^~~~~~~~~
p663.cpp:168:31: note: C++11 'constexpr' only available with '-std=c++11' or '-std=gnu++11'

$ g++ p663.cpp -std=2b -o p663g -I. -Wall
p663.cpp:26:19: error: expected primary-expression before 'int'
   26 | #define see_below int
      |                   ^~~
p663.cpp:34:42: note: in expansion of macro 'see_below'
   34 | constexpr void swap(T& a, T& b) noexcept(see_below); template<class T, size_t N>
      |                                          ^~~~~~~~~
p663.cpp:34:42: error: expected ')' before 'int'
   34 | constexpr void swap(T& a, T& b) noexcept(see_below); template<class T, size_t N>
      |                                         ~^
      |                                          )
p663.cpp:26:19: error: expected initializer before 'int'
   26 | #define see_below int
      |                   ^~~
p663.cpp:34:42: note: in expansion of macro 'see_below'
   34 | constexpr void swap(T& a, T& b) noexcept(see_below); template<class T, size_t N>
      |                                          ^~~~~~~~~
p663.cpp:26:19: error: expected primary-expression before 'int'
   26 | #define see_below int
      |                   ^~~
p663.cpp:38:52: note: in expansion of macro 'see_below'
   38 | constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
      |                                                    ^~~~~~~~~
p663.cpp:38:52: error: expected ')' before 'int'
   38 | constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
      |                                                   ~^
      |                                                    )
p663.cpp:26:19: error: expected initializer before 'int'
   26 | #define see_below int
      |                   ^~~
p663.cpp:38:52: note: in expansion of macro 'see_below'
   38 | constexpr T exchange(T& obj, U&& new_val) noexcept(see_below);
      |                                                    ^~~~~~~~~
p663.cpp:85:60: error: type/value mismatch at argument 2 in template parameter list for 'template<class _Tp, _Tp ..._Idx> struct std::integer_sequence'
   85 | using make_integer_sequence = integer_sequence<T, see_below>;
      |                                                            ^
p663.cpp:85:60: note:   expected a constant of type '_Tp', got 'int'
p663.cpp:110:40: error: 'synth_three_way_result' was not declared in this scope; did you mean 'compare_three_way_result'?
  110 | constexpr common_comparison_category_t<synth_three_way_result<T1>, synth_three_way_result <T2>>
      |                                        ^~~~~~~~~~~~~~~~~~~~~~
      |                                        compare_three_way_result
p663.cpp:110:65: error: template argument 1 is invalid
  110 | constexpr common_comparison_category_t<synth_three_way_result<T1>, synth_three_way_result <T2>>
      |                                                                 ^
p663.cpp:110:66: error: expected unqualified-id before ',' token
  110 | constexpr common_comparison_category_t<synth_three_way_result<T1>, synth_three_way_result <T2>>
      |                                                                  ^
p663.cpp:148:8: error: redefinition of 'struct std::piecewise_construct_t'
  148 | struct piecewise_construct_t {
      |        ^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/12.1.0/bits/stl_algobase.h:64,
                 from /usr/local/include/c++/12.1.0/string:50,
                 from /usr/local/include/c++/12.1.0/bits/locale_classes.h:40,
                 from /usr/local/include/c++/12.1.0/bits/ios_base.h:41,
                 from /usr/local/include/c++/12.1.0/ios:42,
                 from /usr/local/include/c++/12.1.0/ostream:38,
                 from /usr/local/include/c++/12.1.0/iostream:39,
                 from p663.cpp:10:
/usr/local/include/c++/12.1.0/bits/stl_pair.h:80:10: note: previous definition of 'struct std::piecewise_construct_t'
   80 |   struct piecewise_construct_t { explicit piecewise_construct_t() = default; };
      |          ^~~~~~~~~~~~~~~~~~~~~
p663.cpp:151:40: error: redefinition of 'constexpr const std::piecewise_construct_t std::piecewise_construct'
  151 | inline constexpr piecewise_construct_t piecewise_construct{};
      |                                        ^~~~~~~~~~~~~~~~~~~
/usr/local/include/c++/12.1.0/bits/stl_pair.h:83:53: note: 'constexpr const std::piecewise_construct_t std::piecewise_construct' previously defined here
   83 |   _GLIBCXX17_INLINE constexpr piecewise_construct_t piecewise_construct =
      |                                                     ^~~~~~~~~~~~~~~~~~~
p663.cpp:154:8: error: redefinition of 'struct std::in_place_t'
  154 | struct in_place_t {
      |        ^~~~~~~~~~
In file included from /usr/local/include/c++/12.1.0/bits/stl_pair.h:62:
/usr/local/include/c++/12.1.0/bits/utility.h:194:10: note: previous definition of 'struct std::in_place_t'
  194 |   struct in_place_t {
      |          ^~~~~~~~~~
p663.cpp:158:33: error: redefinition of 'constexpr const std::in_place_t std::in_place'
  158 |     inline constexpr in_place_t in_place{};
      |                                 ^~~~~~~~
/usr/local/include/c++/12.1.0/bits/utility.h:198:31: note: 'constexpr const std::in_place_t std::in_place' previously defined here
  198 |   inline constexpr in_place_t in_place{};
      |                               ^~~~~~~~
p663.cpp:160:14: error: redefinition of 'struct std::in_place_type_t<_Tp>'
  160 |       struct in_place_type_t {
      |              ^~~~~~~~~~~~~~~
/usr/local/include/c++/12.1.0/bits/utility.h:200:33: note: previous definition of 'struct std::in_place_type_t<_Tp>'
  200 |   template<typename _Tp> struct in_place_type_t
      |                                 ^~~~~~~~~~~~~~~
p663.cpp:163:59: error: redefinition of 'template<class T> constexpr const std::in_place_type_t<_Tp> std::in_place_type'
  163 |     template<class T> inline constexpr in_place_type_t<T> in_place_type{};
      |                                                           ^~~~~~~~~~~~~
/usr/local/include/c++/12.1.0/bits/utility.h:206:43: note: 'template<class _Tp> constexpr const std::in_place_type_t<_Tp> std::in_place_type<_Tp>' previously declared here
  206 |     inline constexpr in_place_type_t<_Tp> in_place_type{};
      |                                           ^~~~~~~~~~~~~
p663.cpp:165:14: error: redefinition of 'struct std::in_place_index_t<_Idx>'
  165 |       struct in_place_index_t {
      |              ^~~~~~~~~~~~~~~~
/usr/local/include/c++/12.1.0/bits/utility.h:208:32: note: previous definition of 'struct std::in_place_index_t<_Idx>'
  208 |   template<size_t _Idx> struct in_place_index_t
      |                                ^~~~~~~~~~~~~~~~
p663.cpp:168:61: error: redefinition of 'template<long unsigned int I> constexpr const std::in_place_index_t<_Idx> std::in_place_index'
  168 |     template<size_t I> inline constexpr in_place_index_t<I> in_place_index{};
      |                                                             ^~~~~~~~~~~~~~
/usr/local/include/c++/12.1.0/bits/utility.h:214:45: note: 'template<long unsigned int _Idx> constexpr const std::in_place_index_t<_Idx> std::in_place_index<_Idx>' previously declared here
  214 |     inline constexpr in_place_index_t<_Idx> in_place_index{};
      |                                             ^~~~~~~~~~~~~~
```

## 検討事項(agenda)
コンパイルエラーを取るか、コンパイルエラーの理由を解説する。

<!-- リンクエラーの解説をする。clang++とg++の比較。意味のある出力。
コンパイルエラーを取るか、コンパイルエラーの理由を解説する。-->

# 参考資料(reference)

cpprefjp - C++日本語リファレンス

https://cpprefjp.github.io/

コンパイラの実装状況

https://cpprefjp.github.io/implementation-status.html


typedef は C++11 ではオワコン

https://qiita.com/Linda_pp/items/44a67c64c14cba00eef1

C99からC++14を駆け抜けるC++講座

https://qiita.com/yumetodo/items/e49a673afd9a3ecb81a8


@kazuo_reve 私が効果を確認した「小川メソッド」

https://qiita.com/kazuo_reve/items/a3ea1d9171deeccc04da

## 自己参照(self reference)

ockerにclang

https://qiita.com/kaizen_nagoya/items/8829ffeee397eda50e80

docker gnu(gcc/g++) and llvm(clang/clang++)

https://qiita.com/drafts/059874ea39c4de64c0f7

コンパイル用shell script C版(clangとgcc)とC++版(clang++とg++)

https://qiita.com/kaizen_nagoya/items/74220c0577a512c2d7da

C++N4910:2022 tag follower 200人超えました。ありがとうございます。

https://qiita.com/kaizen_nagoya/items/a63fb96d351ac5c16ff7

C++N4910:2022 tag follower 200人超えました。ありがとうございます。

https://qiita.com/kaizen_nagoya/items/a63fb96d351ac5c16ff7

コピペコンパイルエラーあるある

https://qiita.com/kaizen_nagoya/items/29c832de9d762aed2761

C++ Error Message Collection(1)does not name a type, 11 articles

https://qiita.com/kaizen_nagoya/items/acb9f1a9b5aad6df06bd

dockerにclang

https://qiita.com/kaizen_nagoya/items/8829ffeee397eda50e80

docker gnu(gcc/g++) and llvm(clang/clang++)

https://qiita.com/drafts/059874ea39c4de64c0f7

コンパイル用shell script C版(clangとgcc)とC++版(clang++とg++)

https://qiita.com/kaizen_nagoya/items/74220c0577a512c2d7da

Compare the contents of C++N4910:2022, C++N4741:2018 and C++N4606:2015

https://qiita.com/kaizen_nagoya/items/483246d40f98abff7ded

C++ sample list

https://qiita.com/kaizen_nagoya/items/54ad75b73825b7c04f86

clang++, g++コンパイルエラー方針の違いの例

https://qiita.com/kaizen_nagoya/items/ea6e5009fe126d270a82

astyle 使ってみた

https://qiita.com/kaizen_nagoya/items/3c9a87a781d53a1a23f3

C++N4606 Working Draft 2016, ISO/IEC 14882, C++ standardのコード断片をコンパイルするためにしていること
https://qiita.com/kaizen_nagoya/items/a8d7ee2f2e29e76c19c1

コンパイル用shell script C版(clangとgcc)とC++版(clang++とg++)
https://qiita.com/kaizen_nagoya/items/74220c0577a512c2d7da

Clang/Clang++(LLVM) gcc/g++(GNU) コンパイラ警告等比較
https://qiita.com/kaizen_nagoya/items/9a82b958cc3aeef0403f

C++2003とC++2017でコンパイルエラーになるならない事例集
https://qiita.com/kaizen_nagoya/items/a13ea3823441c430edff

Qiitaに投稿するCのStyle例(暫定)
https://qiita.com/kaizen_nagoya/items/946df1528a6a1ef2bc0d

cpprefjpのdecltypeをコンパイル試験
https://qiita.com/kaizen_nagoya/items/090909af702f0d5d8a67

MISRA C++ 5-0-16
https://qiita.com/kaizen_nagoya/items/7df2d4e05db724752a74

C++ Templates Part1 BASICS Chapter 3. Class Templates 3.2 Use of Class Template Stack stack1test.cpp
https://qiita.com/kaizen_nagoya/items/cd5fc49106fad5a4e9ed

ISO/IEC TS 17961:2013 C Secure Coding Rules(1) All list(to be confirmed)
https://qiita.com/kaizen_nagoya/items/54e056195c4f11b850a1

C言語（C++)に対する誤解、曲解、無理解、爽快。
https://qiita.com/kaizen_nagoya/items/3f3992c9722c1cee2e3a

C Puzzle Bookの有り難み5つ、C言語規格及びCコンパイラの特性を認識
https://qiita.com/kaizen_nagoya/items/d89a48c1536a02ecdec9

'wchar.h' file not found で困った clang++ macOS
https://qiita.com/kaizen_nagoya/items/de15cd46d657517fac11

Open POSIX Test Suiteの使い方を調べはじめました
https://qiita.com/kaizen_nagoya/items/644d5e407f5faf96e6dc

MISRA-C 2012 Referenceに掲載している文献の入手可能性を確認
https://qiita.com/kaizen_nagoya/items/96dc8b125e462d5575bb

どうやって MISRA Example Suiteをコンパイルするか
https://qiita.com/kaizen_nagoya/items/fbdbff5ff696e2ca7f00

MISRA C まとめ #include <misra_c.h>
https://qiita.com/kaizen_nagoya/items/f1a79a7cbd281607c7c9

「C++完全理解ガイド」の同意できること上位10
https://qiita.com/kaizen_nagoya/items/aa5744e0c4a8618c7671

DoCAP（ドゥーキャップ）って何ですか？

https://qiita.com/kaizen_nagoya/items/47e0e6509ab792c43327

小川メソッド　覚え（書きかけ）

https://qiita.com/kaizen_nagoya/items/3593d72eca551742df68


 ＜この記事は個人の過去の経験に基づく個人の感想です。現在所属する組織、業務とは関係がありません。＞

# 文書履歴(document history)
ver. 0.01 初稿 　20220723