DIP1004: Inherited Constructors

[Dicebot via Digitalmars-d-announce]

On 11/29/2016 12:04 PM, Arafel wrote:
> I think I might be a bit late to the party, and I'm still quite new in
> D... but wouldn't a variadic template constructor work? The usual rules
> of templates would still let you override a constructor if needed.
> 
> ---
> class A {
>     this() { }
>     this(int a) { }
> }
> class B : A {
>     // Here we inherit all of A's constructors.
>     this(Args...)(Args args) {
>         super(args);
>     }
>     this(string s) { }
> }
> void main() {
>     B b1 = new B(42);
>     B b2 = new B("foo");
> }
> ---
> 
> I've been playing with it, and the only problems I can see are with
> specialization and casting (i.e. B defines this(float), but you want to
> call A's this(int), the int will be promoted to float and B's version
> will be used). A way of disabling them would be needed, though...
> perhaps assert(0)?

Have just answered a similar question in a PR thread:
https://github.com/dlang/DIPs/pull/42#issuecomment-263562276

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