Discussion: Rvalue refs and a Move construtor for D
kinke at gmx.net
Wed Sep 4 09:20:05 UTC 2019
On Wednesday, 4 September 2019 at 00:33:06 UTC, Exil wrote:
> How would it work with multi-function passing though? With a
> rvalue reference, you are effectively just passing around a
> reference, until the contents of the value are moved. So you
> can pass it through N functions and it won't ever to do a
> Would you effectively be relying on the compiler to optimize
> out the un-necessary moves, or would they be unavoidable, as
> they effectively are now?
Yes, by changing the ABI details to the C++ way in this regard,
making move/forward intrinsics and detecting them in argument
expressions. Laid out earlier in this thread in
https://email@example.com. We don't need rvalue refs in the language for that at all, just use a value parameter - rvalue args will be passed by ref under the hood, just like explicitly moved lvalue args.
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