On Sunday, 28 June 2015 at 13:08:48 UTC, rsw0x wrote:
On Sunday, 28 June 2015 at 11:06:01 UTC, Marc Schütz wrote:
On Sunday, 28 June 2015 at 07:36:41 UTC, Jonathan M Davis
wrote:
It makes no sense to pass rvalues by ref. The ref has to
refer to a memory location so that a pointer can be passed
underneath the hood, and rvalues don't qualify for that.
I strongly disagree with that. This is an implementation
detail. `ref` describes a specific semantic, namely that no
copying (observable by a postblit being called) takes place,
no, it means pass by reference.
this sounds like some convoluted C++ doublespeak definition.
Well, try experimenting with LDC with -O3 -output-s on some test
programs. You will be surprised ;-) There will often be no
"reference" in the resulting output, especially with inlining.
The definition I used is not necessarily the best one, but it
needs to be based on observable behaviour, not implementation
specifics, otherwise compilers would have no freedom in
optimizing.
