Q about template function overloads

[Bill Baxter]

Gah, sorry to continue this monologue, but apparently my belief that the 
dummy trick wouldn't work ALSO came from a manifestation of bug 688.

This *does* work:

FooStruct!(T) func(T)(FooStruct!(T) a) {
     writefln("Calling FooStruct version");
     return a;
}

FooStruct!(T) func(dumm=void,T)(T[] a) {
     FooStruct!(T) ret;
     writefln("Calling [] version");
     return ret;
}

I think I'm going to have to put my blas/lapack array math module on 
hold for a bit till this bug gets fixed.  The errors and workarounds are 
becoming a little too detrimental to productivity.

--bb

Bill Baxter wrote:
> Bill Baxter wrote:
> 
>> Also how do I write the equivalent of this:
>>
>>     static if( is( T S: S[]) ) {
>>         alias Array!(S)  _ArrayTForT;
>>     }
>>
>> For the case where T is a user-defined array type:
>>     /// doesn't work!
>>     static if( is( T S: Array!(S)) ) {
>>         alias Array!(S)  _ArrayTForT;
>>     }
>> It really shouldn't just be an "else" catch-all in the code above.  It 
>> should be checking for an instantiation of Array!().
> 
> This second part of my question seems to be a result of bug 688[1]. That 
> is, the check 'is(T S:Array!(S))' *does* work if Array is a struct, just 
> not if it's a class.
> 
> But I would still be interested in any suggestions for how to do the 
> overloading in a more elegant way.
> 
> [1] http://d.puremagic.com/issues/show_bug.cgi?id=688
> 
> --bb