[Issue 12597] Payload getter for std.typecons.Typedef

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12597

--- Comment #3 from Andrej Mitrovic <andrej.mitrovich at gmail.com> ---
(In reply to bearophile_hugs from comment #2)
> (In reply to Andrej Mitrovic from comment #1)
> 
> > what if the original type is a user-defined type
> > that already defines the get() method?
> 
> Then perhaps you need to write this?
> 
> auto y3 = sin(x.get.get);

That would cause existing and generic code to break. For example:

-----
module test;

import std.typecons;

struct S
{
    int get() { return 0; }
}

alias S2 = Typedef!S;

void main()
{
    S2 s2;
    auto x = s2.get();  // works now
}
-----

If we want a solid Typedef in D2 then we have to take this into account as
well.

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