[Issue 24720] Can't alias __traits(getMember)

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24720

--- Comment #2 from RazvanN <razvan.nitu1305 at gmail.com> ---
(In reply to RazvanN from comment #1)
> The issue has nothing to do with __traits(getMember). It's the alias that's
> the problem:
> 
> struct T
> {
> 	void myFun(int x) {}
> }
> T instance;
> 
> void test()
> {
> 	alias fun = instance.myFun;
> 	fun(10); // error: instance required
> }
> 
> The problem is that you cannot alias an expression, only symbols or types.
> The problem here seems to be that the fun alias is accepted, but the
> compiler actually aliases to the T.myFun symbol which is not attached to any
> particular symbol. Looking at the docs [1] I see that the last runnable line
> in the example is commented (alias c = s.j) is commented out with a
> "scheduled for deprecation" comment, so I assume that this was discussed at
> some point.
> 
> PS: this has been reported in the past multiple times:
> https://issues.dlang.org/show_bug.cgi?id=6842 .
> 
> 
> [1] https://dlang.org/spec/declaration.html#alias-variable
> 
> *** This issue has been marked as a duplicate of issue 6842 ***

I meant: "but the compiler actually aliases to the T.myFun symbol which is not
attached to any particular instance". Sorry for the confusion.

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