Guidelines for the use of the C++14 language in critical and
safety-related systems Sample code compile list(134)
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。
A15-4-1.cpp
算譜(source code)
A15-4-1.cpp
//Guidelines for the use of the C++14 language in critical and safety-related systems
const char* msg="Rule A15-4-1 (required, implementation, automated)Dynamic exception-specification shall not be used.(134)A15-4-1.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: A15-4-1.cpp 270728 2017-03-16 10:38:20Z piotr.tanski $
#include <stdexcept>
void f1() noexcept {
cout<<"f1()noexcept"<<endl;
} // Compliant - note that noexcept is the same as/// @ add {} for link error
// noexcept(true)
void f2() throw() {
cout<<"f2()throw()"<<endl;
} // Non-compliant - dynamic exception-specification is/// @ add {} for link error
// deprecated
void f3() noexcept(false) {
cout<<"f3()noexcept(false)"<<endl;
}; // Compliant/// @ add {} for link error
void f4() throw(std::runtime_error) {
cout<<"f4()thorow(std::runtime_error)"<<endl;
} // Non-compliant - dynamic/// @ add {} for link error
// exception-specification is deprecated
void f5() throw(...) {
cout<<"f5()throw(...)"<<endl;
} // Non-compliant - dynamic exception-specification is deprecated/// @ add {} for link error
template <class T>
void f6() noexcept(noexcept(T())); // Compliant
/// @ end AUTOSAR
int start() { /// @{} for start
f1();
f2();
f3();
f4();
f5();
/// f6(); compile error
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 a15-4-1
$ clang++ a15-4-1.cpp -I./ -std=c++14 -Wall
f1()noexcept
f2()throw()
f3()noexcept(false)
f4()thorow(std::runtime_error)
f5()throw(...)
Rule A15-4-1 (required, implementation, automated)Dynamic exception-specification shall not be used.(134)A15-4-1.cpp
$ clang++ a15-4-1.cpp -I./ -std=c++17 -Wall
a15-4-1.cpp:22:11: error: ISO C++17 does not allow dynamic exception specifications [-Wdynamic-exception-spec]
void f4() throw(std::runtime_error){cout<<"f4()thorow(std::runtime_error)"<<endl;} // Non-compliant - dynamic/// @ a...
^~~~~~~~~~~~~~~~~~~~~~~~~
a15-4-1.cpp:22:11: note: use 'noexcept(false)' instead
void f4() throw(std::runtime_error){cout<<"f4()thorow(std::runtime_error)"<<endl;} // Non-compliant - dynamic/// @ a...
^~~~~~~~~~~~~~~~~~~~~~~~~
noexcept(false)
a15-4-1.cpp:25:12: error: ISO C++17 does not allow dynamic exception specifications [-Wdynamic-exception-spec]
void f5() throw(...){cout<<"f5()throw(...)"<<endl;} // Non-compliant - dynamic exception-specification is deprecate...
^~~~~~~~~~
a15-4-1.cpp:25:12: note: use 'noexcept(false)' instead
void f5() throw(...){cout<<"f5()throw(...)"<<endl;} // Non-compliant - dynamic exception-specification is deprecate...
^~~~~~~~~~
noexcept(false)
2 errors generated.
$ clang++ a15-4-1.cpp -I./ -std=c++2a -Wall
a15-4-1.cpp:22:11: error: ISO C++17 does not allow dynamic exception specifications [-Wdynamic-exception-spec]
void f4() throw(std::runtime_error){cout<<"f4()thorow(std::runtime_error)"<<endl;} // Non-compliant - dynamic/// @ a...
^~~~~~~~~~~~~~~~~~~~~~~~~
a15-4-1.cpp:22:11: note: use 'noexcept(false)' instead
void f4() throw(std::runtime_error){cout<<"f4()thorow(std::runtime_error)"<<endl;} // Non-compliant - dynamic/// @ a...
^~~~~~~~~~~~~~~~~~~~~~~~~
noexcept(false)
a15-4-1.cpp:25:12: error: ISO C++17 does not allow dynamic exception specifications [-Wdynamic-exception-spec]
void f5() throw(...){cout<<"f5()throw(...)"<<endl;} // Non-compliant - dynamic exception-specification is deprecate...
^~~~~~~~~~
a15-4-1.cpp:25:12: note: use 'noexcept(false)' instead
void f5() throw(...){cout<<"f5()throw(...)"<<endl;} // Non-compliant - dynamic exception-specification is deprecate...
^~~~~~~~~~
noexcept(false)
2 errors generated.
$ g++-8 a15-4-1.cpp -I./ -std=c++14 -Wall
a15-4-1.cpp:22:11: warning: dynamic exception specifications are deprecated in C++11 [-Wdeprecated]
void f4() throw(std::runtime_error){cout<<"f4()thorow(std::runtime_error)"<<endl;} // Non-compliant - dynamic/// @ add {} for link error
^~~~~
a15-4-1.cpp:25:18: error: expected type-specifier before '...' token
void f5() throw(...){cout<<"f5()throw(...)"<<endl;} // Non-compliant - dynamic exception-specification is deprecated/// @ add {} for link error
^~~
a15-4-1.cpp:25:12: warning: dynamic exception specifications are deprecated in C++11 [-Wdeprecated]
void f5() throw(...){cout<<"f5()throw(...)"<<endl;} // Non-compliant - dynamic exception-specification is deprecated/// @ add {} for link error
^~~~~
$ g++-8 a15-4-1.cpp -I./ -std=c++17 -Wall
a15-4-1.cpp:22:11: error: ISO C++17 does not allow dynamic exception specifications
void f4() throw(std::runtime_error){cout<<"f4()thorow(std::runtime_error)"<<endl;} // Non-compliant - dynamic/// @ add {} for link error
^~~~~
a15-4-1.cpp:25:18: error: expected type-specifier before '...' token
void f5() throw(...){cout<<"f5()throw(...)"<<endl;} // Non-compliant - dynamic exception-specification is deprecated/// @ add {} for link error
^~~
a15-4-1.cpp:25:12: error: ISO C++17 does not allow dynamic exception specifications
void f5() throw(...){cout<<"f5()throw(...)"<<endl;} // Non-compliant - dynamic exception-specification is deprecated/// @ add {} for link error
^~~~~
$ g++-8 a15-4-1.cpp -I./ -std=c++2a -Wall
a15-4-1.cpp:22:11: error: ISO C++17 does not allow dynamic exception specifications
void f4() throw(std::runtime_error){cout<<"f4()thorow(std::runtime_error)"<<endl;} // Non-compliant - dynamic/// @ add {} for link error
^~~~~
a15-4-1.cpp:25:18: error: expected type-specifier before '...' token
void f5() throw(...){cout<<"f5()throw(...)"<<endl;} // Non-compliant - dynamic exception-specification is deprecated/// @ add {} for link error
^~~
a15-4-1.cpp:25:12: error: ISO C++17 does not allow dynamic exception specifications
void f5() throw(...){cout<<"f5()throw(...)"<<endl;} // Non-compliant - dynamic exception-specification is deprecated/// @ add {} for link error
^~~~~
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
C++2017, C++202aではコンパイルエラーになる。
4. clang++, g++の比較検討項目
clang++ 2014対応ではコンパイルエラーなし、g++だと...がコンパイルエラーに。
5. f6();を実行する際に、役立つまたは意味のあるコンパイルエラーにならない方法。
f6();ではコンパイルエラーになるため註釈に。
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/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