I dun a DIP, possibly the best DIP ever

[Fynn Schröder]

On Sunday, 26 April 2020 at 11:13:25 UTC, Sebastiaan Koppe wrote:
> On Sunday, 26 April 2020 at 10:20:49 UTC, Walter Bright wrote:
>> On 4/24/2020 6:31 PM, Manu wrote:
>>> Javascript also uses `...` for something similar-ish, so the 
>>> web guys should find it familiar too.
>>
>> I don't remember Javascript doing that, though it's been 20 
>> years since I worked on the JS compiler. Maybe it's a later 
>> addition.
>
> It is a recent addition, ES6 I believe.
>
> They use it in destructuring:
>
> ```
> const {a, b, rest...} = {a:1, b:2, c:3, d:4}; // rest == {c:3, 
> d:4}
> ```
>
> and in expanding arrays
>
> ```
> function foo(a,b) {}
> const ab = [1,2];
> foo(...ab);
> ```
> snip

JavaScript uses ... as the spread operator. It expands an 
expression in places where multiple arguments are expected. Since 
JavaScript does not have tuples, arrays are used instead.

D's equivalent for JS ... operator on function parameters would 
be Tuple.expand