Const ref and rvalues again...

[Dmitry Olshansky]

11/7/2012 9:04 PM, martin пишет:
> On Wednesday, 7 November 2012 at 14:07:31 UTC, martin wrote:
>> C++:
>> void f(T& a) { // for lvalues
>>     this->resource = a.resource;
>>     a.resetResource();
>> }
>> void f(T&& a) { // for rvalues (moved)
>>     this->resource = a.resource;
>>     a.resetResource();
>> }
>>
>> D:
>> void f(ref T a) { // for lvalues
>>     this.resource = a.resource;
>>     a.resetResource();
>> }
>> void f(T a) { // rvalue argument is not copied, but moved
>>     this.resource = a.resource;
>>     a.resetResource();
>> }
>
> You could probably get away with a single-line overload, both in C++ and D:
>
> C++:
> void f(T& a) { // for lvalues
>      // convert a to mutable rvalue reference and
>      // invoke the main overload f(T&&)
>      f(std::move(a));
> }
>
> D:
> void f(T a) { // rvalue argument is not copied, but moved
>      // the original argument is now named a (an lvalue)
>      // invoke the main overload f(ref T)
>      f(a);
> }

Yup, and I'd like auto ref to actually do this r-value trampoline for me.

-- 
Dmitry Olshansky