[Issue 7653] remove "function literals cannot be class members" annoyance

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=7653



--- Comment #13 from Vladimir Panteleev <thecybershadow at gmail.com> 2014-03-02 23:12:36 EET ---
Sorry, there does appear to be a misunderstanding.

I am referring to the code in the issue description:

(In reply to comment #0)
> class C{
>     mixin({
>         string r;
>         foreach(x;["a","b","c"]) r~="int "~x~";";
>         return r;
>     }());
> }

With Kenji's pull from issue 11545, this code compiles and works fine.

This code does not need an instance of C to work, thus it does not have a
context pointer, and so I've referred to it as a "function literal" in my last
comment.

The two examples you posted earlier do have a context pointer:

(In reply to comment #6)
> class C{
>     mixin(delegate{
>         string r;
>         foreach(x;["a","b","c"]) r~="int "~x~";";
>         return r;
>     }());
> }

Here, although the code does not refer to C fields or methods, it is explicitly
declared as a delegate.

> template ID(alias a){ alias ID=a; }
> class C{
>     int x=3;
>     alias a = ID!(()=>x);
> }
> static assert(new C().a()==3);

Here it refers to x, and thus needs a context pointer.

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