• Bent Rasmussen (32/35) Jul 06 2004 I've run into some problems using a struct template. I've reduced the co...

"Bent Rasmussen" <exo bent-rasmussen.info> writes:

I've run into some problems using a struct template. I've reduced the code
to this

struct vector()
{
    static vector opCall()
    {
        vector v;
        return v;
    }
}

alias vector!() some;

vector!() test()
{
    //return some();
    //return vector!()();
    //return some!()();
}

Now the three lines in the body of test each give a different result.

The first

dmd test.d

c:\dmd\bin\..\..\dm\bin\link.exe test,,,user32+kernel32/noi;

The second

dmd test.d

test.d(11): template vector() is used as a type
test.d(11): variable v voids have no value
test.d(12): v must be an array or pointer type, not void

The third

dmd test.d

template instance some!() some is not a template declaration

Now, the first case is obviously fine, no problem. The third case is
obviously not fine, its illegal but here the problem is that the compiler
crashes. The second case I'd expect to work. The difference between the
first and the second case is that the first case calls opCall on an aliased
instance of vector while the second case instantiates vector and calls
opCall on it inline.