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@kaizen_nagoya(Dr. Kiyoshi Ogawa)

18.5.3 Concept equality_comparable [concept.equalitycomparable]C++N4910:2022 (366) p554.c

Last updated at Posted at 2022-07-13

はじめに(Introduction)

N4910 Working Draft, Standard for Programming Language C++

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

C++N4741, 2018 Standard Working Draft on ISO/IEC 14882 sample code compile list

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++

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.

18.5.3 Concept equality_comparable [concept.equalitycomparable]C++N4910:2022 (366) p554.c

算譜(source code)

p554.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 = "18.5.3 Concept equality_comparable [concept.equalitycomparable]C++N4910:2022 (366) p554.c";
// 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 <typeinfo>

using namespace std;

// Example 1  
template<class T, class U>
concept weakly-equality-comparable-with = // exposition only
    requires(const remove_reference_t<T>& t,
             const remove_reference_t<U>& u) {
};
{ t ==u } -> boolean_testable;
{ t != u } -> boolean_testable;
{ u == t } -> boolean_testable; 
{ u !=t } -> boolean_testable;
template<class T>
concept equality_comparable = weakly-equality-comparable-with<T, T>;
template<class T, class U>
  concept equality_comparable_with =
equality_comparable<T> && equality_comparable<U> &&
common_reference_with<const remove_reference_t<T>&, const remove_reference_t<U>&> &&
equality_comparable<
  common_reference_t<
    const remove_reference_t<T>&,
    const remove_reference_t<U>&>> &&
weakly-equality-comparable-with<T, U>;
// Given types T and U, let t be an lvalue of type const remove_reference_t<T>, u be an lvalue of type const remove_reference_t<U>, and C be:
common_reference_t<const remove_reference_t<T>&, const remove_reference_t<U>&>;
int main(){
  cout  <<  n4910 << endl;
  return EXIT_SUCCESS;
}

編纂・実行結果(compile and go)

bash
# ./clgc.sh p554
$ clang++ p554.cpp -std=c++03 -o p554l -I. -Wall
In file included from p554.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 \
 ^
p554.cpp:27:1: error: unknown type name 'concept'
concept weakly_equality_comparable_with = // exposition only
^
p554.cpp:27:9: warning: variable templates are a C++14 extension [-Wc++14-extensions]
concept weakly_equality_comparable_with = // exposition only
        ^
p554.cpp:28:14: error: expected expression
    requires(const remove_reference_t<T>& t,
             ^
p554.cpp:29:14: error: expected expression
             const remove_reference_t<U>& u) {
             ^
p554.cpp:31:1: error: expected unqualified-id
{ t ==u } -> boolean_testable;
^
p554.cpp:31:11: error: cannot use arrow operator on a type
{ t ==u } -> boolean_testable;
          ^
p554.cpp:32:1: error: expected unqualified-id
{ t != u } -> boolean_testable;
^
p554.cpp:32:12: error: cannot use arrow operator on a type
{ t != u } -> boolean_testable;
           ^
p554.cpp:33:1: error: expected unqualified-id
{ u == t } -> boolean_testable; 
^
p554.cpp:33:12: error: cannot use arrow operator on a type
{ u == t } -> boolean_testable; 
           ^
p554.cpp:34:1: error: expected unqualified-id
{ u !=t } -> boolean_testable;
^
p554.cpp:34:11: error: cannot use arrow operator on a type
{ u !=t } -> boolean_testable;
          ^
p554.cpp:36:1: error: unknown type name 'concept'
concept equality_comparable = weakly_equality_comparable_with<T, T>;
^
p554.cpp:36:9: warning: variable templates are a C++14 extension [-Wc++14-extensions]
concept equality_comparable = weakly_equality_comparable_with<T, T>;
        ^
p554.cpp:38:3: error: unknown type name 'concept'
  concept equality_comparable_with =
  ^
p554.cpp:38:11: warning: variable templates are a C++14 extension [-Wc++14-extensions]
  concept equality_comparable_with =
          ^
p554.cpp:40:29: error: no template named 'remove_reference_t'
common_reference_with<const remove_reference_t<T>&, const remove_reference_t<U>&> &&
                            ^
p554.cpp:40:81: error: expected expression
common_reference_with<const remove_reference_t<T>&, const remove_reference_t<U>&> &&
                                                                                ^
p554.cpp:41:1: error: use of address-of-label extension outside of a function body
equality_comparable<
^
p554.cpp:43:33: error: a template declaration can only declare a single entity
    const remove_reference_t<T>&,
                                ^
p554.cpp:47:45: error: use of undeclared identifier 'T'
common_reference_t<const remove_reference_t<T>&, const remove_reference_t<U>&>;
                                            ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
3 warnings and 20 errors generated.
rm: cannot remove 'p554l': No such file or directory
$ clang++ p554.cpp -std=c++2b -o p554l -I. -Wall
p554.cpp:30:1: error: a requires expression must contain at least one requirement
};
^
p554.cpp:31:1: error: expected unqualified-id
{ t ==u } -> boolean_testable;
^
p554.cpp:31:11: error: cannot use arrow operator on a type
{ t ==u } -> boolean_testable;
          ^
p554.cpp:32:1: error: expected unqualified-id
{ t != u } -> boolean_testable;
^
p554.cpp:32:12: error: cannot use arrow operator on a type
{ t != u } -> boolean_testable;
           ^
p554.cpp:33:1: error: expected unqualified-id
{ u == t } -> boolean_testable; 
^
p554.cpp:33:12: error: cannot use arrow operator on a type
{ u == t } -> boolean_testable; 
           ^
p554.cpp:34:1: error: expected unqualified-id
{ u !=t } -> boolean_testable;
^
p554.cpp:34:11: error: cannot use arrow operator on a type
{ u !=t } -> boolean_testable;
          ^
p554.cpp:39:1: error: reference to 'equality_comparable' is ambiguous
equality_comparable<T> && equality_comparable<U> &&
^
p554.cpp:36:9: note: candidate found by name lookup is 'equality_comparable'
concept equality_comparable = weakly_equality_comparable_with<T, T>;
        ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/concepts:290:13: note: candidate found by name lookup is 'std::equality_comparable'
    concept equality_comparable = __detail::__weakly_eq_cmp_with<_Tp, _Tp>;
            ^
p554.cpp:39:1: error: reference to 'equality_comparable' is ambiguous
equality_comparable<T> && equality_comparable<U> &&
^
p554.cpp:36:9: note: candidate found by name lookup is 'equality_comparable'
concept equality_comparable = weakly_equality_comparable_with<T, T>;
        ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/concepts:290:13: note: candidate found by name lookup is 'std::equality_comparable'
    concept equality_comparable = __detail::__weakly_eq_cmp_with<_Tp, _Tp>;
            ^
p554.cpp:39:27: error: reference to 'equality_comparable' is ambiguous
equality_comparable<T> && equality_comparable<U> &&
                          ^
p554.cpp:36:9: note: candidate found by name lookup is 'equality_comparable'
concept equality_comparable = weakly_equality_comparable_with<T, T>;
        ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/concepts:290:13: note: candidate found by name lookup is 'std::equality_comparable'
    concept equality_comparable = __detail::__weakly_eq_cmp_with<_Tp, _Tp>;
            ^
p554.cpp:39:27: error: reference to 'equality_comparable' is ambiguous
equality_comparable<T> && equality_comparable<U> &&
                          ^
p554.cpp:36:9: note: candidate found by name lookup is 'equality_comparable'
concept equality_comparable = weakly_equality_comparable_with<T, T>;
        ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/concepts:290:13: note: candidate found by name lookup is 'std::equality_comparable'
    concept equality_comparable = __detail::__weakly_eq_cmp_with<_Tp, _Tp>;
            ^
p554.cpp:41:1: error: reference to 'equality_comparable' is ambiguous
equality_comparable<
^
p554.cpp:36:9: note: candidate found by name lookup is 'equality_comparable'
concept equality_comparable = weakly_equality_comparable_with<T, T>;
        ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/concepts:290:13: note: candidate found by name lookup is 'std::equality_comparable'
    concept equality_comparable = __detail::__weakly_eq_cmp_with<_Tp, _Tp>;
            ^
p554.cpp:41:1: error: reference to 'equality_comparable' is ambiguous
equality_comparable<
^
p554.cpp:36:9: note: candidate found by name lookup is 'equality_comparable'
concept equality_comparable = weakly_equality_comparable_with<T, T>;
        ^
/usr/bin/../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/concepts:290:13: note: candidate found by name lookup is 'std::equality_comparable'
    concept equality_comparable = __detail::__weakly_eq_cmp_with<_Tp, _Tp>;
            ^
p554.cpp:47:45: error: use of undeclared identifier 'T'
common_reference_t<const remove_reference_t<T>&, const remove_reference_t<U>&>;
                                            ^
p554.cpp:47:78: error: expected unqualified-id
common_reference_t<const remove_reference_t<T>&, const remove_reference_t<U>&>;
                                                                             ^
17 errors generated.

$ g++ p554.cpp -std=c++03 -o p554g -I. -Wall
In file included from /usr/local/include/c++/12.1.0/atomic:38,
                 from p554.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 \
      |  ^~~~~
p554.cpp:27:1: error: 'concept' does not name a type; did you mean 'const'?
   27 | concept weakly_equality_comparable_with = // exposition only
      | ^~~~~~~
      | const
p554.cpp:27:1: note: 'concept' only available with '-std=c++20' or '-fconcepts'
p554.cpp:31:1: error: expected unqualified-id before '{' token
   31 | { t ==u } -> boolean_testable;
      | ^
p554.cpp:31:11: error: expected unqualified-id before '->' token
   31 | { t ==u } -> boolean_testable;
      |           ^~
p554.cpp:32:1: error: expected unqualified-id before '{' token
   32 | { t != u } -> boolean_testable;
      | ^
p554.cpp:32:12: error: expected unqualified-id before '->' token
   32 | { t != u } -> boolean_testable;
      |            ^~
p554.cpp:33:1: error: expected unqualified-id before '{' token
   33 | { u == t } -> boolean_testable;
      | ^
p554.cpp:33:12: error: expected unqualified-id before '->' token
   33 | { u == t } -> boolean_testable;
      |            ^~
p554.cpp:34:1: error: expected unqualified-id before '{' token
   34 | { u !=t } -> boolean_testable;
      | ^
p554.cpp:34:11: error: expected unqualified-id before '->' token
   34 | { u !=t } -> boolean_testable;
      |           ^~
p554.cpp:36:1: error: 'concept' does not name a type; did you mean 'const'?
   36 | concept equality_comparable = weakly_equality_comparable_with<T, T>;
      | ^~~~~~~
      | const
p554.cpp:36:1: note: 'concept' only available with '-std=c++20' or '-fconcepts'
p554.cpp:38:3: error: 'concept' does not name a type; did you mean 'const'?
   38 |   concept equality_comparable_with =
      |   ^~~~~~~
      |   const
p554.cpp:38:3: note: 'concept' only available with '-std=c++20' or '-fconcepts'
p554.cpp:47:1: error: 'common_reference_t' does not name a type
   47 | common_reference_t<const remove_reference_t<T>&, const remove_reference_t<U>&>;
      | ^~~~~~~~~~~~~~~~~~
rm: cannot remove 'p554g': No such file or directory

$ g++ p554.cpp -std=c++2b -o p554g -I. -Wall
p554.cpp:30:1: error: expected primary-expression before '}' token
   30 | };
      | ^
p554.cpp:29:47: error: expected ';' before '}' token
   29 |              const remove_reference_t<U>& u) {
      |                                               ^
      |                                               ;
   30 | };
      | ~                                              
p554.cpp:31:1: error: expected unqualified-id before '{' token
   31 | { t ==u } -> boolean_testable;
      | ^
p554.cpp:31:11: error: expected unqualified-id before '->' token
   31 | { t ==u } -> boolean_testable;
      |           ^~
p554.cpp:32:1: error: expected unqualified-id before '{' token
   32 | { t != u } -> boolean_testable;
      | ^
p554.cpp:32:12: error: expected unqualified-id before '->' token
   32 | { t != u } -> boolean_testable;
      |            ^~
p554.cpp:33:1: error: expected unqualified-id before '{' token
   33 | { u == t } -> boolean_testable;
      | ^
p554.cpp:33:12: error: expected unqualified-id before '->' token
   33 | { u == t } -> boolean_testable;
      |            ^~
p554.cpp:34:1: error: expected unqualified-id before '{' token
   34 | { u !=t } -> boolean_testable;
      | ^
p554.cpp:34:11: error: expected unqualified-id before '->' token
   34 | { u !=t } -> boolean_testable;
      |           ^~
p554.cpp:39:1: error: reference to 'equality_comparable' is ambiguous
   39 | equality_comparable<T> && equality_comparable<U> &&
      | ^~~~~~~~~~~~~~~~~~~
In file included from /usr/local/include/c++/12.1.0/compare:39,
                 from /usr/local/include/c++/12.1.0/bits/char_traits.h:45,
                 from /usr/local/include/c++/12.1.0/ios:40,
                 from /usr/local/include/c++/12.1.0/ostream:38,
                 from /usr/local/include/c++/12.1.0/iostream:39,
                 from p554.cpp:10:
/usr/local/include/c++/12.1.0/concepts:288:13: note: candidates are: 'template<class _Tp> concept std::equality_comparable'
  288 |     concept equality_comparable = __detail::__weakly_eq_cmp_with<_Tp, _Tp>;
      |             ^~~~~~~~~~~~~~~~~~~
p554.cpp:36:9: note:                 'template<class T> concept equality_comparable'
   36 | concept equality_comparable = weakly_equality_comparable_with<T, T>;
      |         ^~~~~~~~~~~~~~~~~~~
p554.cpp:39:22: error: expected primary-expression before '>' token
   39 | equality_comparable<T> && equality_comparable<U> &&
      |                      ^
p554.cpp:39:27: error: label 'equality_comparable' referenced outside of any function
   39 | equality_comparable<T> && equality_comparable<U> &&
      |                           ^~~~~~~~~~~~~~~~~~~
p554.cpp:39:48: error: expected primary-expression before '>' token
   39 | equality_comparable<T> && equality_comparable<U> &&
      |                                                ^
p554.cpp:40:1: error: label 'common_reference_with' referenced outside of any function
   40 | common_reference_with<const remove_reference_t<T>&, const remove_reference_t<U>&> &&
      | ^~~~~~~~~~~~~~~~~~~~~
p554.cpp:40:23: error: expected primary-expression before 'const'
   40 | common_reference_with<const remove_reference_t<T>&, const remove_reference_t<U>&> &&
      |                       ^~~~~
p554.cpp:47:45: error: 'T' was not declared in this scope
   47 | common_reference_t<const remove_reference_t<T>&, const remove_reference_t<U>&>;
      |                                             ^
p554.cpp:47:46: error: template argument 1 is invalid
   47 | common_reference_t<const remove_reference_t<T>&, const remove_reference_t<U>&>;
      |                                              ^
p554.cpp:47:78: error: template argument 1 is invalid
   47 | common_reference_t<const remove_reference_t<T>&, const remove_reference_t<U>&>;
      |                                                                              ^

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。

Script

clgc.sh
#!/bin/sh
rm $1l
rm $1g
echo "$ clang++ $1.cpp -std=03 -o $1l -I. -Wall" 
clang++ $1.cpp -std=c++03 -o $1l -I. -Wall
if [  -e $1l ]; then
./$1l 
fi
rm $1l
echo "$ clang++ $1.cpp -std=2b -o $1l -I. -Wall"
clang++ $1.cpp -std=c++2b -o $1l -I. -Wall
if [  -e $1l ]; then
./$1l
fi
echo "\r"
echo "$ g++ $1.cpp -std=03 -o $1g -I. -Wall"
g++ $1.cpp -std=c++03 -o $1g -I. -Wall
if [ -e $1g ]; then
./$1g
fi
rm $1g
echo "\r"
echo "$ g++ $1.cpp -std=2b -o $1g -I. -Wall"
g++ $1.cpp -std=c++2b -o $1g -I. -Wall
if [ -e $1g ]; then
./$1g 
fi

参考資料(reference)

cpprefjp - C++日本語リファレンス

コンパイラの実装状況

typedef は C++11 ではオワコン

C99からC++14を駆け抜けるC++講座

@kazuo_reve 私が効果を確認した「小川メソッド」

自己参照(self reference)

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

DoCAP（ドゥーキャップ）って何ですか？

小川メソッド　覚え（書きかけ）

コピペコンパイルエラーあるある

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

dockerにclang

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

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

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

C++ sample list

clang++, g++コンパイルエラー方針の違いの例

astyle 使ってみた

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

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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
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

＜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。＞

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