[Issue 6619] New: Forward a single field to a subfield, like "alias this"

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6619

           Summary: Forward a single field to a subfield, like "alias
                    this"
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: thecybershadow at gmail.com


--- Comment #0 from Vladimir Panteleev <thecybershadow at gmail.com> 2011-09-07 07:18:12 PDT ---
It would be nice if this worked:

struct S1 { int f; }
struct S2
{
    S1 s1;
    alias s1.f g;
}

The error message, which occurs only when trying to access "g", is also
somewhat confusing:

Error: struct test.S2 'f' is not a member
Error: struct test.S2 member f is not accessible
Error: this for f needs to be type S1 not type S2

A more general solution would be to allow aliasing expressions, but it sounds
like a large language change which would require some discussion first.

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