Autosar Guidelines C++14, example code compile list(114)Rule A14-1-1 A template should check if a specific template argument is suitable for this template.

Guidelines for the use of the C++14 language in critical and
safety-related systems Sample code compile list(114)
https://www.autosar.org/fileadmin/user_upload/standards/adaptive/17-03/AUTOSAR_RS_CPP14Guidelines.pdf
Autosar Guidelines C++14, example code compile list will be listed.

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。

A14-1-1.cpp

算譜(source code)

A14-1-1.cpp

//Guidelines for the use of the C++14 language in critical and safety-related systems
const char* msg="Rule A14-1-1 (advisory, implementation, non-automated)A template should check if a specific template argument is suitable for this template.(114)A14-1-1.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: A14-1-1.cpp 271696 2017-03-23 09:23:09Z piotr.tanski $
#include <utility>
class A
{
public:
  A() = default;
  ~A() = default;
  A(A const&) = delete;
  A& operator=(A const&) = delete;
  A(A&&) = delete;
  A& operator=(A&&) = delete;
};
class B
{
public:
  B() = default;
  B(B const&) = default;
  B& operator=(B const&) = default;
  B(B&&) = default;
  B& operator=(B&&) = default;
};
template <typename T>
void f1(T const& obj) noexcept(false)
{
  static_assert(
    std::is_copy_constructible<T>(),
    "Given template type is not copy constructible."); // Compliant
}
template <typename T>
class C
{
// Compliant
  static_assert(std::is_trivially_copy_constructible<T>(),
                "Given template type is not trivially copy constructible.");

// Compliant
  static_assert(std::is_trivially_move_constructible<T>(),
                "Given template type is not trivially move constructible.");

// Compliant
  static_assert(std::is_trivially_copy_assignable<T>(),
                "Given template type is not trivially copy assignable.");

// Compliant
  static_assert(std::is_trivially_move_assignable<T>(),
                "Given template type is not trivially move assignable.");

public:
  C() = default;
  C(C const&) = default;
  C& operator=(C const&) = default;
  C(C&&) = default;
  C& operator=(C&&) = default;

private:
  T c;
};
template <typename T>
class D
{
public:
  D() = default;
  D(D const&) = default; // Non-compliant - T may not be copyable
  D& operator=(D const&) = default; // Non-compliant - T may not be copyable
  D(D&&) = default; // Non-compliant - T may not be movable
  D& operator=(D&&) = default; // Non-compliant - T may not be movable

private:
  T d;
};
void f2() noexcept
{
  A a;
  B b;
  cout << &a << "f1<A>(a):compile error"<<endl; /// @ line for output
//  f1<A>(a); // Class A is not copy constructible, compile-time error
// occurs
  f1<B>(b); // Class B is copy constructible
// C<A> c1; // Class A can not be used for template class C, compile-time
// error occurs
  C<B> c2; // Class B can be used for template class C
  cout <<"&c2=" <<&c2 <<endl;/// @ line for output

  D<A> d1;
  cout << &d1 <<"D<A> d2=d1; compile error"<<endl;///@ line for output
// D<A> d2 = d1; // Class D can not be copied, because class A is not
// copyable, compile=time error occurs
// D<A> d3 = std::move(d1); // Class D can not be moved, because class A is
// not movable, compile-time error occurs
  D<B> d4;
  D<B> d5 = d4;
  D<B> d6 = std::move(d4);
  cout << "&d5="<<&d5<<" &d6="<<&d6<<endl;/// @ line for output
}
/// @ end AUTOSAR
int start() { /// @{} for start
  f2();
  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 a14-1-1
$ clang++ a14-1-1.cpp -I./ -std=c++14 -Wall
0x7ffeeba576d0f1<A>(a):compile error
&c2=0x7ffeeba576c0
0x7ffeeba576b8D<A> d2=d1; compile error
&d5=0x7ffeeba576a8 &d6=0x7ffeeba576a0
Rule A14-1-1 (advisory, implementation, non-automated)A template should check if a specific template argument is suitable for this template.(114)A14-1-1.cpp
$ clang++ a14-1-1.cpp  -I./ -std=c++17 -Wall
0x7ffee98f36d0f1<A>(a):compile error
&c2=0x7ffee98f36c0
0x7ffee98f36b8D<A> d2=d1; compile error
&d5=0x7ffee98f36a8 &d6=0x7ffee98f36a0
Rule A14-1-1 (advisory, implementation, non-automated)A template should check if a specific template argument is suitable for this template.(114)A14-1-1.cpp
$ clang++ a14-1-1.cpp  -I./ -std=c++2a -Wall
0x7ffee9b046d0f1<A>(a):compile error
&c2=0x7ffee9b046c0
0x7ffee9b046b8D<A> d2=d1; compile error
&d5=0x7ffee9b046a8 &d6=0x7ffee9b046a0
Rule A14-1-1 (advisory, implementation, non-automated)A template should check if a specific template argument is suitable for this template.(114)A14-1-1.cpp

$ g++-8 a14-1-1.cpp  -I./ -std=c++14  -Wall
0x7ffee064e73ff1<A>(a):compile error
&c2=0x7ffee064e73d
0x7ffee064e73cD<A> d2=d1; compile error
&d5=0x7ffee064e73a &d6=0x7ffee064e739
Rule A14-1-1 (advisory, implementation, non-automated)A template should check if a specific template argument is suitable for this template.(114)A14-1-1.cpp
$ g++-8 a14-1-1.cpp  -I./ -std=c++17  -Wall
0x7ffee8d2873ff1<A>(a):compile error
&c2=0x7ffee8d2873d
0x7ffee8d2873cD<A> d2=d1; compile error
&d5=0x7ffee8d2873a &d6=0x7ffee8d28739
Rule A14-1-1 (advisory, implementation, non-automated)A template should check if a specific template argument is suitable for this template.(114)A14-1-1.cpp
$ g++-8 a14-1-1.cpp  -I./ -std=c++2a  -Wall
0x7ffee91db73ff1<A>(a):compile error
&c2=0x7ffee91db73d
0x7ffee91db73cD<A> d2=d1; compile error
&d5=0x7ffee91db73a &d6=0x7ffee91db739
Rule A14-1-1 (advisory, implementation, non-automated)A template should check if a specific template argument is suitable for this template.(114)A14-1-1.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 20180612