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Effective C++ Third version, sample code compile list(17) Store newed objects in smart pointers in standalone statements

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Effective C++: 55 Specific Ways to Improve Your Programs and DesignsThird version by Scott Mayers

https://www.informit.com/store/effective-c-plus-plus-55-specific-ways-to-improve-your-9780321334879

https://www.amazon.com/dp/0321334876

Sample code from

Yuzhen11/Effective_CPP

https://github.com/Yuzhen11/Effective_CPP


算譜(source code)


ec17.cpp

///Effective C++:  55 Specific Ways to Improve Your Programs and DesignsThird version by Scott Mayers

///https://www.informit.com/store/effective-c-plus-plus-55-specific-ways-to-improve-your-9780321334879
#include <iostream>
#include <cstdlib>
#include <memory>
using namespace std;

const char * msg ="Item 17: Store newed objects in smart pointers in standalone statements";

class Widget {
///
};
int priority() {
return true;
};
template <typename T>
void processWidget(shared_ptr<T>,int) {};
/// From here "Effective C++

void f() {

processWidget(std::shared_ptr<Widget>(new Widget), priority());
//The order may be:

//Execute new Widget

//Call priority

//Call the shared_ptr constructor

//Exception may be thrown between 2 and 3.

std::shared_ptr<Widget> pw(new Widget);
processWidget(pw, priority()); // this call won't leak
}
//Things to Remember

//Store newed objects in smart pointers in standalone statements. //Failure to do this can lead to subtle resource leaks when exceptions are thrown.
/// to here from "Effective C++"

int main() {
cout << msg << endl;
return EXIT_SUCCESS;
}



編纂・実行結果(compile and go)


cpa.sh

$ ../cpa.sh ec17

$ clang++ ec17.cpp -I./ -std=c++14 -Wall
Item 17: Store newed objects in smart pointers in standalone statements
$ clang++ ec17.cpp -I./ -std=c++17 -Wall
Item 17: Store newed objects in smart pointers in standalone statements
$ clang++ ec17.cpp -I./ -std=c++2a -Wall
Item 17: Store newed objects in smart pointers in standalone statements

$ g++-8 ec17.cpp -I./ -std=c++14 -Wall
Item 17: Store newed objects in smart pointers in standalone statements
$ g++-8 ec17.cpp -I./ -std=c++17 -Wall
Item 17: Store newed objects in smart pointers in standalone statements
$ g++-8 ec17.cpp -I./ -std=c++2a -Wall
Item 17: Store newed objects in smart pointers in standalone statements



課題(agenda)

1)役に立つまたは意味のある関数、クラスの呼び出し方

2)役に立つまたは意味のある出力


参考資料(reference)

docker gnu(gcc/g++) and llvm(clang/clang++)

https://qiita.com/drafts/059874ea39c4de64c0f7

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https://qiita.com/kaizen_nagoya/items/5f4b155030259497c4de

C++N4606 Working Draft 2016, ISO/IEC 14882, C++ standardのコード断片をコンパイルするためにしていること

https://qiita.com/kaizen_nagoya/items/a8d7ee2f2e29e76c19c1

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https://qiita.com/kaizen_nagoya/items/74220c0577a512c2d7da

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https://qiita.com/kaizen_nagoya/items/9a82b958cc3aeef0403f

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https://qiita.com/kaizen_nagoya/items/a13ea3823441c430edff

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https://qiita.com/kaizen_nagoya/items/946df1528a6a1ef2bc0d

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https://qiita.com/kaizen_nagoya/items/090909af702f0d5d8a67

MISRA C++ 5-0-16

https://qiita.com/kaizen_nagoya/items/7df2d4e05db724752a74

C++ Templates Part1 BASICS Chapter 3. Class Templates 3.2 Use of Class Template Stack stack1test.cpp

https://qiita.com/kaizen_nagoya/items/cd5fc49106fad5a4e9ed

ISO/IEC TS 17961:2013 C Secure Coding Rules(1) All list(to be confirmed)

https://qiita.com/kaizen_nagoya/items/54e056195c4f11b850a1

C言語(C++)に対する誤解、曲解、無理解、爽快。

https://qiita.com/kaizen_nagoya/items/3f3992c9722c1cee2e3a

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https://qiita.com/kaizen_nagoya/items/de15cd46d657517fac11

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https://qiita.com/kaizen_nagoya/items/644d5e407f5faf96e6dc

MISRA-C 2012 Referenceに掲載している文献の入手可能性を確認

https://qiita.com/kaizen_nagoya/items/96dc8b125e462d5575bb

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https://qiita.com/kaizen_nagoya/items/fbdbff5ff696e2ca7f00

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https://qiita.com/kaizen_nagoya/items/f1a79a7cbd281607c7c9

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C++参考資料一覧

https://researchmap.jp/joub9b3my-1797580/#_1797580


文書履歴(document history)

ver. 0.10 初稿 20180624