C++ Logo

STD-DISCUSSION

Advanced search

Subject: Re: Should the constructor of std::reference_wrapper be explicit?
From: Vladimir Grigoriev (vlad.moscow_at_[hidden])
Date: 2021-03-26 13:47:44


I am sorry. I made an incorrect resume about the error. Nevertheless the questions about implicit constructor are actual.
 
 
You can meet me at http://cpp.forum24.ru/ or www.stackoverflow.com or http://ru.stackoverflow.com
 
 
>Пятница, 26 марта 2021, 21:33 +03:00 от Vladimir Grigoriev via Std-Discussion <std-discussion_at_[hidden]>:
> 
>Consider the following code snippet.
> 
>    int x = 10;
>    std::reference_wrapper<int> rx( x );
>    std::swap( rx, x );
> 
>The compiler will issue an error because either rx can be implicitly converted to the type int or x can be implicitly converted to the type std::reference_wrapper<int>.
> 
>So a pair of questions are arising.
> 
>Should the constructor of the class template std::reference_wrapper be explicit?
>What is the reason that the constructor is implicit? Is that so necessary?
> 
>You can meet me at http://cpp.forum24.ru/ or www.stackoverflow.com or http://ru.stackoverflow.com
> 
>--
>Std-Discussion mailing list
>Std-Discussion_at_[hidden]
>https://lists.isocpp.org/mailman/listinfo.cgi/std-discussion
 



STD-DISCUSSION list run by std-discussion-owner@lists.isocpp.org

Older Archives on Google Groups