http://d.puremagic.com/issues/show_bug.cgi?id=1717

           Summary: Template class with opAssign should be nullable
           Product: D
           Version: 1.023
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla@digitalmars.com
        ReportedBy: vertex@gmx.at


class Foo(T)
{
T opAssign(T v) { return v; }
}

void main()
{
auto foo = new Foo!(float)();
foo = cast(Foo!(float))null; // Works
foo = null;                  // Error: Can't convert null to float
}

DMD should not try to implicitly cast null to template type, but set the reference to null instead.


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http://d.puremagic.com/issues/show_bug.cgi?id=1717


bugzilla@digitalmars.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX




------- Comment #1 from bugzilla@digitalmars.com  2008-01-18 12:21 -------
This is (one reason) why opAssign for classes is getting dropped in D 2.0.


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