August 30, 2011
http://d.puremagic.com/issues/show_bug.cgi?id=6574

           Summary: Erroneous recursive call in template instantiation
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: andrej.mitrovich@gmail.com


--- Comment #0 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2011-08-29 19:49:09 PDT ---
For lack of a better name..

import std.stdio;

enum Method
{
    A,
    B,
}

void Foo(Method method = Method.A)()
{
    write("dispatch, ");
    Foo!method();
}

void Foo(Method method : Method.A)()
{
    writeln("Foo A");
}

void Foo(Method method : Method.B)()
{
    writeln("Foo B");
}

void main()
{
    Foo!();           // dispatch, Foo A
    Foo();            // dispatch, Foo A
}

That works. Now uncomment the first instantiation, the `Foo!()` part and compile and run. The "dispatch" template instance keeps calling itself until the stack is blown and the app exits.

What I was trying to do with code like the above was to use template overloading with type specialization to switch between different types of drawing methods. The default "dispatch" template is there in case the user doesn't care which drawing method to use, the dispatch would then instantiate a specialized template (one specialized for Method.A in this case).

But as you can see, this is buggy territory..

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