[Issue 6569] New: Template fails to instantiate when alias this is used

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6569

           Summary: Template fails to instantiate when alias this is used
           Product: D
           Version: D2
          Platform: Other
        OS/Version: All
            Status: NEW
          Keywords: rejects-valid
          Severity: major
          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> 2011-08-28 14:12:01 PDT ---
enum Type
{
    A,
    B,
}

struct Foo {}
struct Bar
{
    Foo foo;
    alias foo this;
}

void main() 
{
    Bar bar;
    test!(Type.A)(bar);           // fail
    test!(Type.A)(cast(Foo)bar);  // ok
}

void test(Type type)(Foo foo)
    if (type == Type.A)
{
}

void test(Type type)(Foo foo)     // comment out and both run ok
    if (type == Type.B)
{
}

If you remove the second test() template both instantiations in main() will
work, which is very odd.

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