[Issue 4041] New: Error with ref or auto ref return from opOpAssign

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4041

           Summary: Error with ref or auto ref return from opOpAssign
           Product: D
           Version: 2.041
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: aldacron at gmail.com


--- Comment #0 from Mike Parker <aldacron at gmail.com> 2010-04-01 18:26:25 PDT ---
##############################
struct Foo
{
    int x;

    ref Foo opOpAssign(string op)(ref Foo f) if(op == "+=")
    {
        x += f.x;
        return this;
    }
}

void main()
{
    Foo f1 = Foo(1);
    Foo f2 = Foo(2);
    f2 += f1;
}
#################################

Results in: 

refret.d(5): Error: variable refret.Foo.op only parameters or foreach
declaratio
ns can be ref

Change the return type from 'ref Foo' to 'auto ref Foo' and the same error
occurs. Remove the ref from the return and it compiles. Comment out the 'f2 +=
f1' and it compiles.

This happens on both 2.041 and 2.042. I haven't tried earlier versions.

BTW, 2.042 is missing from the version list here on Bugzilla.

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