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Re: RFC: lalr1.cc: support move semantics
From: |
Frank Heckenbach |
Subject: |
Re: RFC: lalr1.cc: support move semantics |
Date: |
Wed, 12 Sep 2018 23:46:19 +0200 |
Hans Åberg wrote:
> >>> Modern C++ (i.e., C++11 and later) introduced "move only" types: types
> >>> such
> >>> as std::unique_ptr<T> that can never be duplicated. They must never be
> >>> copied (by assignments and constructors), they must be "moved". The
> >>> implementation of lalr1.cc used to copy symbols (including their
> >>> semantic
> >>> values). This commit ensures that values are only moved in modern C++,
> >>> yet
> >>> remain compatible with C++98/C++03.
> >>
> >> Hopefully copy only types can still be used. So say:
> >
> > C++ will automatically copy when copy is available and move is not.
>
> Yes, but strictly, that is not what the above text says.
Depends on your definitions. IMHO in (modern) C++ "move" always
implies "copy" if possible and necessary, though I wouldn't object
to spelling it out here.
Regards,
Frank
- RFC: lalr1.cc: support move semantics, Akim Demaille, 2018/09/09
- Re: RFC: lalr1.cc: support move semantics, Frank Heckenbach, 2018/09/11
- Re: RFC: lalr1.cc: support move semantics, Akim Demaille, 2018/09/11
- Re: RFC: lalr1.cc: support move semantics, Frank Heckenbach, 2018/09/11
- Re: RFC: lalr1.cc: support move semantics, Akim Demaille, 2018/09/12
- Re: RFC: lalr1.cc: support move semantics, Akim Demaille, 2018/09/12
- Re: RFC: lalr1.cc: support move semantics, Akim Demaille, 2018/09/12
- Re: RFC: lalr1.cc: support move semantics, Hans Åberg, 2018/09/12
- Re: RFC: lalr1.cc: support move semantics, Frank Heckenbach, 2018/09/12
- Re: RFC: lalr1.cc: support move semantics, Hans Åberg, 2018/09/12
- Re: RFC: lalr1.cc: support move semantics,
Frank Heckenbach <=
- Re: RFC: lalr1.cc: support move semantics, Hans Åberg, 2018/09/12
- Re: RFC: lalr1.cc: support move semantics, Hans Åberg, 2018/09/12
- Re: RFC: lalr1.cc: support move semantics, Akim Demaille, 2018/09/13
- Re: RFC: lalr1.cc: support move semantics, Hans Åberg, 2018/09/13
- Re: RFC: lalr1.cc: support move semantics, Frank Heckenbach, 2018/09/13
- Re: RFC: lalr1.cc: support move semantics, Akim Demaille, 2018/09/13
- Re: C++ preferences (was: RFC: lalr1.cc: support move semantics), Frank Heckenbach, 2018/09/12
- Re: C++ preferences (was: RFC: lalr1.cc: support move semantics), Akim Demaille, 2018/09/13
- Re: C++ preferences, Hans Åberg, 2018/09/13
- Re: C++ preferences, Akim Demaille, 2018/09/13