Re: ReturnThis/@chain

[Eric Poggel]

On 7/23/2010 10:21 PM, dsimcha wrote:
class Foo {
     Type _val;
     typeof(this) val(Type newVal) {
         _val = newVal;
         return this;
     }
}

class Bar : Foo {
     // More properties.
}

void main() {
     auto bar = new Bar;
     bar.val(someValue).barProperty(someOtherValue);  // Won't work.
}

What about using templates?  I haven't tested this code but it seems 
like I've accomplished something similar before.

class Foo(T=Foo) {
    Type _val;

    T val(Type newVal) {
        _val = newVal;
        return this;
    }
}

class Bar : Foo!(Bar) {
    // More properties.
}