[Issue 5831] New: Template specialization ordering bug

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5831

           Summary: Template specialization ordering bug
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Mac OS X
            Status: NEW
          Keywords: rejects-valid
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: code at klickverbot.at


--- Comment #0 from klickverbot <code at klickverbot.at> 2011-04-10 14:27:26 PDT ---
The following snippet produces an ambiguity error with the latest DMD 2
(0219a5f):
---
struct Foo(T) {}
struct Foo(T : Bar!R, U = int, R) {}
struct Bar(R) {}

Foo!(Bar!float) f;
---

If the »U = int« parameter is removed, the second overload is correctly
selected:
---
struct Foo(T) { pramga(msg, "1"); }
struct Foo(T : Bar!R, R) { pragma(msg, "2"); }
struct Bar(R) {}

Foo!(Bar!float) f; // prints 2
---

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