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Re: Automatially move from $n (was: C++11 move semantics)
From: |
Hans Åberg |
Subject: |
Re: Automatially move from $n (was: C++11 move semantics) |
Date: |
Sat, 15 Sep 2018 23:20:29 +0200 |
> On 15 Sep 2018, at 22:56, Frank Heckenbach <address@hidden> wrote:
>
> You don't need h at all.
>
> Simply "b = std::move (a);" will do the same. All it does is convert
> a to an rvalue reference. If A has a move assignment operator, this
> will be chosen, if it doesn't but a copy assignment operator, that
> one will be chosen. That's all standard C++ behaviour.
But you can't safely or in general have Bison writing $$ = std::move(a)
directly as one might do something else to a afterwards. So a way to make it
safe is to jump out of the action statement. Using functions and returns is
probably not a good idea because one would have to capture variables in the
action.
> What I want (or actually have, since I imeplented it :) is a way to
> make Bison apply std::move automatically.
But that just applies it always, which might be safe for your move only type,
but is not safe in general, right?
- Re: Automatially move from $n (was: C++11 move semantics), (continued)
- Re: Automatially move from $n (was: C++11 move semantics), Hans Åberg, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Frank Heckenbach, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Hans Åberg, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Frank Heckenbach, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Hans Åberg, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Frank Heckenbach, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Hans Åberg, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Frank Heckenbach, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Hans Åberg, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Frank Heckenbach, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics),
Hans Åberg <=
- Re: Automatially move from $n (was: C++11 move semantics), Frank Heckenbach, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Hans Åberg, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Frank Heckenbach, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Hans Åberg, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Frank Heckenbach, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Hans Åberg, 2018/09/15
- Re: Automatially move from $n (was: C++11 move semantics), Frank Heckenbach, 2018/09/16
- Re: Automatially move from $n (was: C++11 move semantics), Hans Åberg, 2018/09/16
- Re: Automatially move from $n (was: C++11 move semantics), Frank Heckenbach, 2018/09/16
- Re: Automatially move from $n (was: C++11 move semantics), Hans Åberg, 2018/09/16