Re: Operator overloading problem

[div0]

On 06/08/2010 21:37, div0 wrote:


You need to add a second template parameter for the function arguments
and add a template constrait like so:

struct Group {
    int i1;

    Group opBinary(string op, U) (U x)
    if(op == "+" && is(U: int))
    {
        // do somehting
        return this;
    }

    Group opBinary(string op, U) (U rhs)
    if(op == "+" && is(U: Group))
    {
        // do something
        return this;
    }
}

And if you are old school C++ and don't like these new fangled template 
constraints you can use specialisation as well:

struct Group {
    int i1;

    Group opBinary(string op : "+", U: int) (U x) {
        // do somehting
        return this;
    }

    Group opBinary(string op : "+", U: Group) (U rhs) {
        // do something
        return this;
    }
}


--
My enormous talent is exceeded only by my outrageous laziness.
http://www.ssTk.co.uk