目的(purpose)

AutosarのC++ GuidelineをOS, 制御のプログラムで利用するにあたって、以下を検討する。
(1)hosted, freestandingのどちらを基本にすべきか。(2)C++2014,C++2017, C++202aのどれを用いると良いか。
(3)どの処理系を併用すると良いか。
-std=c++14, -std=c++17, -std=c++2aの3種類で、複数のコンパイラでコンパイルすることにより、誤(error)、警告(warning)、関数・変数連携(link)、出力(output)、にどのような影響があるかを確認する。

成果(outcome)

複数の処理系の特徴が明確になる。
各標準段階の違いを明確にする。
hostedまたはfreestandingの特徴と課題を明確にする。

A18-1-3.cpp

算譜(source code)

A18-1-3.cpp

//Guidelines for the use of the C++14 language in critical and safety-related systems
const char* msg="Rule A18-1-3 (required, implementation, automated) The std::auto_ptr shall not be used.(154)A18-1-3.cpp";
//https://www.autosar.org/fileadmin/user_upload/standards/adaptive/17-03/AUTOSAR_RS_CPP14Guidelines.pdf
// There is no description about Autosar declear hosted or freestanding.
// If the Autosar intended both depending on the cases, autosar.h can choose one.
// Compile with -DHOSTED work as  hosted environment, -DFREESTANDING work as freestanding.

# include "autosar.h"/// @line add header file https://qiita.com/kaizen_nagoya/items/4bde8f21ab059b96cf2a

using namespace std;/// @line add using

/// @ start AUTOSAR: From here to the "///end AUTOSAR" are from the AUTOSAR code without some code having /// comment in line.
// $Id: A18-1-3.cpp 271687 2017-03-23 08:57:35Z piotr.tanski $
# include <cstdint>
# include <memory>
# include <vector>
void fn() noexcept
{
  std::auto_ptr<std::int32_t> ptr1(new std::int32_t(10)); // Non-compliant
  std::unique_ptr<std::int32_t> ptr2 =
    std::make_unique<std::int32_t>(10); // Compliant
  std::vector<std::auto_ptr<std::int32_t>> v; // Non-compliant
}
/// @ end AUTOSAR
int start() { /// @{} for start
  fn();
  cout<< msg << endl;
  ShutdownOS()  EXIT_SUCCESS;
/// Autosar OS 3.1.1, 2009: 7.1.2.2 Undefined Behaviour in OSEK OS
/// OS425 If ShutdownOS is called and ShutdownHook() returns then the operating system shall disable all interrupts and enter an endless loop.
}

編纂・実行結果(compile and go)

cpa.sh

$ ../cpa.sh a18-1-3
$ clang++ a18-1-3.cpp -I./ -std=c++14 -Wall
Rule A18-1-3 (required, implementation, automated) The std::auto_ptr shall not be used.(154)A18-1-3.cpp
$ clang++ a18-1-3.cpp  -I./ -std=c++17 -Wall
a18-1-3.cpp:19:6: error: no member named 'auto_ptr' in namespace 'std'
std::auto_ptr<std::int32_t> ptr1(new std::int32_t(10)); // Non-compliant
~~~~~^
a18-1-3.cpp:19:27: error: expected '(' for function-style cast or type construction
std::auto_ptr<std::int32_t> ptr1(new std::int32_t(10)); // Non-compliant
              ~~~~~~~~~~~~^
a18-1-3.cpp:19:29: error: use of undeclared identifier 'ptr1'
std::auto_ptr<std::int32_t> ptr1(new std::int32_t(10)); // Non-compliant
                            ^
a18-1-3.cpp:22:19: error: no member named 'auto_ptr' in namespace 'std'
 std::vector<std::auto_ptr<std::int32_t>> v; // Non-compliant
             ~~~~~^
a18-1-3.cpp:22:40: error: expected '(' for function-style cast or type construction
 std::vector<std::auto_ptr<std::int32_t>> v; // Non-compliant
                           ~~~~~~~~~~~~^
a18-1-3.cpp:22:44: warning: declaration does not declare anything [-Wmissing-declarations]
 std::vector<std::auto_ptr<std::int32_t>> v; // Non-compliant
                                           ^
1 warning and 5 errors generated.
$ clang++ a18-1-3.cpp  -I./ -std=c++2a -Wall
a18-1-3.cpp:19:6: error: no member named 'auto_ptr' in namespace 'std'
std::auto_ptr<std::int32_t> ptr1(new std::int32_t(10)); // Non-compliant
~~~~~^
a18-1-3.cpp:19:27: error: expected '(' for function-style cast or type construction
std::auto_ptr<std::int32_t> ptr1(new std::int32_t(10)); // Non-compliant
              ~~~~~~~~~~~~^
a18-1-3.cpp:19:29: error: use of undeclared identifier 'ptr1'
std::auto_ptr<std::int32_t> ptr1(new std::int32_t(10)); // Non-compliant
                            ^
a18-1-3.cpp:22:19: error: no member named 'auto_ptr' in namespace 'std'
 std::vector<std::auto_ptr<std::int32_t>> v; // Non-compliant
             ~~~~~^
a18-1-3.cpp:22:40: error: expected '(' for function-style cast or type construction
 std::vector<std::auto_ptr<std::int32_t>> v; // Non-compliant
                           ~~~~~~~~~~~~^
a18-1-3.cpp:22:44: warning: declaration does not declare anything [-Wmissing-declarations]
 std::vector<std::auto_ptr<std::int32_t>> v; // Non-compliant
                                           ^
1 warning and 5 errors generated.

$ g++-8 a18-1-3.cpp  -I./ -std=c++14  -Wall
a18-1-3.cpp: In function 'void fn()':
a18-1-3.cpp:19:6: warning: 'template<class> class std::auto_ptr' is deprecated [-Wdeprecated-declarations]
 std::auto_ptr<std::int32_t> ptr1(new std::int32_t(10)); // Non-compliant
      ^~~~~~~~
In file included from /usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/memory:80,
                 from a18-1-3.cpp:15:
/usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/bits/unique_ptr.h:53:28: note: declared here
   template<typename> class auto_ptr;
                            ^~~~~~~~
a18-1-3.cpp:22:19: warning: 'template<class> class std::auto_ptr' is deprecated [-Wdeprecated-declarations]
  std::vector<std::auto_ptr<std::int32_t>> v; // Non-compliant
                   ^~~~~~~~
In file included from /usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/memory:80,
                 from a18-1-3.cpp:15:
/usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/bits/unique_ptr.h:53:28: note: declared here
   template<typename> class auto_ptr;
                            ^~~~~~~~
Rule A18-1-3 (required, implementation, automated) The std::auto_ptr shall not be used.(154)A18-1-3.cpp
$ g++-8 a18-1-3.cpp  -I./ -std=c++17  -Wall
a18-1-3.cpp: In function 'void fn()':
a18-1-3.cpp:19:6: warning: 'template<class> class std::auto_ptr' is deprecated [-Wdeprecated-declarations]
 std::auto_ptr<std::int32_t> ptr1(new std::int32_t(10)); // Non-compliant
      ^~~~~~~~
In file included from /usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/memory:80,
                 from a18-1-3.cpp:15:
/usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/bits/unique_ptr.h:53:28: note: declared here
   template<typename> class auto_ptr;
                            ^~~~~~~~
a18-1-3.cpp:22:19: warning: 'template<class> class std::auto_ptr' is deprecated [-Wdeprecated-declarations]
  std::vector<std::auto_ptr<std::int32_t>> v; // Non-compliant
                   ^~~~~~~~
In file included from /usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/memory:80,
                 from a18-1-3.cpp:15:
/usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/bits/unique_ptr.h:53:28: note: declared here
   template<typename> class auto_ptr;
                            ^~~~~~~~
Rule A18-1-3 (required, implementation, automated) The std::auto_ptr shall not be used.(154)A18-1-3.cpp
$ g++-8 a18-1-3.cpp  -I./ -std=c++2a  -Wall
a18-1-3.cpp: In function 'void fn()':
a18-1-3.cpp:19:6: warning: 'template<class> class std::auto_ptr' is deprecated [-Wdeprecated-declarations]
 std::auto_ptr<std::int32_t> ptr1(new std::int32_t(10)); // Non-compliant
      ^~~~~~~~
In file included from /usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/memory:80,
                 from a18-1-3.cpp:15:
/usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/bits/unique_ptr.h:53:28: note: declared here
   template<typename> class auto_ptr;
                            ^~~~~~~~
a18-1-3.cpp:22:19: warning: 'template<class> class std::auto_ptr' is deprecated [-Wdeprecated-declarations]
  std::vector<std::auto_ptr<std::int32_t>> v; // Non-compliant
                   ^~~~~~~~
In file included from /usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/memory:80,
                 from a18-1-3.cpp:15:
/usr/local/Cellar/gcc/8.1.0/include/c++/8.1.0/bits/unique_ptr.h:53:28: note: declared here
   template<typename> class auto_ptr;
                            ^~~~~~~~
Rule A18-1-3 (required, implementation, automated) The std::auto_ptr shall not be used.(154)A18-1-3.cpp

検討事項(agenda)

1. 自律(freestanding)環境. 接待(hosted)環境

C++N4606 1.4 Implementation compliance p.4

2. 対応OSの水準、対応通信規約、応用機能による分類

freestanding用の関数、ライブラリ等

3. C++2014, C++2017, C++202aの比較項目

Clang++ 2014エラーなし、2017,202aコンパイルエラー。

4. clang++, g++の比較検討項目

clang++2017, 202aコンパイルエラー、g++警告

5. 役立つまたは意味のある実行時エラーを取る方法

6. 役立つまたは意味のある出力

参考文献(reference)

C++N4741 2018

Working Draft, Standard for Programming Language C++
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/n4741.pdf

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

C++N4606 2016

Working Draft, Standard for Programming Language C++
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/n4606.pdf

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

文書履歴(document history)

ver 0.10 初稿 20180612
ver 0.11 一覧追記 20180613