Guidelines for the use of the C++14 language in critical and
safety-related systems Sample code compile list(165)
https://www.autosar.org/fileadmin/user_upload/standards/adaptive/17-03/AUTOSAR_RS_CPP14Guidelines.pdf
Autosar Guidelines C++14 example code compile list(1-169)
https://qiita.com/kaizen_nagoya/items/8ccbf6675c3494d57a76
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。
A18-9-3.cpp
算譜(source code)
//Guidelines for the use of the C++14 language in critical and safety-related systems
const char* msg="Rule A18-9-3 (required, implementation, automated)The std::move shall not be used on objects declared const or const&.(165)A18-9-3.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: A18-9-3.cpp 271687 2017-03-23 08:57:35Z piotr.tanski $
#include <utility>
class A
{
// Implementation
};
void f1()
{
const A a1{};
A a2 = a1; // Compliant - copy constructor is called
A a3 = std::move(a1); // Non-compliant - copy constructor is called
// implicitly instead of move constructor
cout <<"&a1="<<&a1<<" &a2="<<&a2<<" &a3="<<&a3<<endl;/// @ line for output
}
/// @ end AUTOSAR
int start() { /// @{} for start
f1();
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 a18-9-3
$ clang++ a18-9-3.cpp -I./ -std=c++14 -Wall
&a1=0x10efa7f74 &a2=0x7ffee0c59708 &a3=0x7ffee0c59700
Rule A18-9-3 (required, implementation, automated)The std::move shall not be used on objects declared const or const&.(165)A18-9-3.cpp
$ clang++ a18-9-3.cpp -I./ -std=c++17 -Wall
&a1=0x10580cf74 &a2=0x7ffeea3f4708 &a3=0x7ffeea3f4700
Rule A18-9-3 (required, implementation, automated)The std::move shall not be used on objects declared const or const&.(165)A18-9-3.cpp
$ clang++ a18-9-3.cpp -I./ -std=c++2a -Wall
&a1=0x108aabf74 &a2=0x7ffee7155708 &a3=0x7ffee7155700
Rule A18-9-3 (required, implementation, automated)The std::move shall not be used on objects declared const or const&.(165)A18-9-3.cpp
$ g++-8 a18-9-3.cpp -I./ -std=c++14 -Wall
&a1=0x7ffee6d6873f &a2=0x7ffee6d6873e &a3=0x7ffee6d6873d
Rule A18-9-3 (required, implementation, automated)The std::move shall not be used on objects declared const or const&.(165)A18-9-3.cpp
$ g++-8 a18-9-3.cpp -I./ -std=c++17 -Wall
&a1=0x7ffee70d573f &a2=0x7ffee70d573e &a3=0x7ffee70d573d
Rule A18-9-3 (required, implementation, automated)The std::move shall not be used on objects declared const or const&.(165)A18-9-3.cpp
$ g++-8 a18-9-3.cpp -I./ -std=c++2a -Wall
&a1=0x7ffee341e73f &a2=0x7ffee341e73e &a3=0x7ffee341e73d
Rule A18-9-3 (required, implementation, automated)The std::move shall not be used on objects declared const or const&.(165)A18-9-3.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
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/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 20180614