Guidelines for the use of the C++14 language in critical and
safety-related systems Sample code compile list(63)
https://www.autosar.org/fileadmin/user_upload/standards/adaptive/17-03/AUTOSAR_RS_CPP14Guidelines.pdf
Autosar Guidelines C++14, example code compile list(

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、(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を検討するため、-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とともに、各標準段階, hosted, freestandingの特徴と課題を明確にする。

A7-1-8.cpp

算譜(source code)

A7-1-8.cpp

//Guidelines for the use of the C++14 language in critical and safety-related systems
const char* msg="Rule A7-1-8 (required, implementation, automated)A non-type specifier shall be placed before a type specifier in a declaration.(63)A7-1-8.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" is from AUTOSAR without code having /// comment in line.
// $Id: A7-1-8.cpp 271715 2017-03-23 10:13:51Z piotr.tanski $
# include <cstdint>

typedef std::int32_t int1; // Compliant
std::int32_t typedef int2; // Non-compliant

class C
{
public:
  virtual inline void f1() {
    cout << "x="<<x<<endl;
  }; // Compliant
  inline virtual void f2() {
    cout << "y="<<y<<endl;
  }; // Compliant
  void virtual inline f3() {
    cout << "x*y="<<x*y<<endl;
  }; // Non-compliant
private:
  std::int32_t mutable x; // Non-compliant
  mutable std::int32_t y; // Compliant
};
///end AUTOSAR
int start() { /// @{} for start
  C c;
  c.f1();
  c.f2();
  c.f3();
  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 a7-1-8
$ clang++ a7-1-8.cpp -I./ -std=c++14 -Wall
x=0
y=0
x*y=0
Rule A7-1-8 (required, implementation, automated)A non-type specifier shall be placed before a type specifier in a declaration.(63)A7-1-8.cpp
$ clang++ a7-1-8.cpp  -I./ -std=c++17 -Wall
x=0
y=0
x*y=0
Rule A7-1-8 (required, implementation, automated)A non-type specifier shall be placed before a type specifier in a declaration.(63)A7-1-8.cpp
$ clang++ a7-1-8.cpp  -I./ -std=c++2a -Wall
x=0
y=0
x*y=0
Rule A7-1-8 (required, implementation, automated)A non-type specifier shall be placed before a type specifier in a declaration.(63)A7-1-8.cpp

$ g++-8 a7-1-8.cpp  -I./ -std=c++14  -Wall
x=229462482
y=1
x*y=229462482
Rule A7-1-8 (required, implementation, automated)A non-type specifier shall be placed before a type specifier in a declaration.(63)A7-1-8.cpp
$ g++-8 a7-1-8.cpp  -I./ -std=c++17  -Wall
x=476639698
y=1
x*y=476639698
Rule A7-1-8 (required, implementation, automated)A non-type specifier shall be placed before a type specifier in a declaration.(63)A7-1-8.cpp
$ g++-8 a7-1-8.cpp  -I./ -std=c++2a  -Wall
x=282833362
y=1
x*y=282833362
Rule A7-1-8 (required, implementation, automated)A non-type specifier shall be placed before a type specifier in a declaration.(63)A7-1-8.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

本件なし

4. clang++, g++の比較検討項目

本件なし

5 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/2017/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

ver 0.10 初稿 20180611