DIP69: problem with scope grammar - need a new keyword

[Rikki Cattermole via Digitalmars-d]

On 8/12/2014 10:45 p.m., Walter Bright wrote:
> I thought I could make this work, but it's a problem. There are two
> meanings for scope when attached to a function:
>
>      T func() scope;   // the 'this' pointer is 'scope'

T func() scope(this);

or:

T func(scope(this), ARGS);

It is theoretically the first argument after all.

>      scope T func();   // the function returns a 'scope' T
>
> I have some ideas, but don't particularly like any of them. But I don't
> want to bias things, so what ideas do you guys have?