[Issue 9838] New: Allow calling aliased method on an object

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9838

           Summary: Allow calling aliased method on an object
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: andrej.mitrovich at gmail.com


--- Comment #0 from Andrej Mitrovic <andrej.mitrovich at gmail.com> 2013-03-30 12:24:45 PDT ---
I could really use this feature in D:

auto callFunc(alias func, Class)(Class object)
{
    func(object);  // ok
}

auto callMeth(alias meth, Class)(Class object)
{
    object.meth();  // denied
}

void foo(C c) { }

class C
{
    void foo() { }
}

void main()
{
    C c = new C;
    callFunc!(foo)(c);
    callMeth!(C.foo)(c);
}

The benefit here is that we won't have to use __traits(identifier, meth), and
especially won't have to use a string mixin. 

For example to make the above work properly one has to write:

import std.string;

auto callMeth(alias meth, Class)(Class object)
{
    mixin(format("object.%s();", __traits(identifier, meth)));
}

Or you can use string appending, pick your poison. It's very ugly, even if you
decide to use q{}. String mixins are generally very error-prone and hard to
debug, this feature would alleviate that.

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