Re: Convert array to custom type when passing function argument

[Stefanos Baziotis via Digitalmars-d-learn]

On Wednesday, 17 April 2019 at 12:48:52 UTC, Adam D. Ruppe wrote:

This is the "implicit construction" I sometimes talk about.... 
and D doesn't support it, by design (alas).


Sorry if this has been asked again, I didn't find anything.
Do we know the reason why it is not supported?

There's two options you can do:

1) offer an overload to your function that does the conversion:

void test(Buf!int arr) { /* impl here */ }
void test(int[] arr) { test(Buf!int(arr)); } // just forward to 
the other

or

2) Offer a helper construction function you can call, like:

Buf!int toBuf(int[] a) { return Buf!int(a); }

and then you can call the  function like

test([1, 2, 3].toBuf); // calling your function at the end

Yes, I had done the 2), which means for 50 functions, I have 
another 50 functions.
Because of the constructor these are one-liners but still, it's 
kind of ugly.

I didn't know about the 3) thanks! I think it's not a very good 
solution for this
kind of problems but cool otherwise.

- Stefanos