[Swift-devel] Feature proposal: struct constructors

[Ketan Maheshwari]

I would suggest we change the naming from constructors to something else as
it has some associated OO connotations.

On Tue, Feb 3, 2015 at 4:54 PM, Tim Armstrong <tim.g.armstrong at gmail.com>
wrote:

> Hi All,
>   While designing a location-aware feature for Swift/T Justin and I came
> across a scenario where we wanted to use Swift structs, but where it was
> very painful to assign each element individually.  To give you an idea:
>
> type foo {
>   int x;
>   int y;
> }
>
> foo bar;
> bar.x = 1;
> bar.y = 2;
>
> I'm looking at adding a feature where we can fill in a structs fields with
> a single expression.
>
> We could do them the C-style way, but that doesn't allow us to use them
> without defining a new variable (the issue is that {} doesn't specify the
> intended type, meaning it needs to come from context):
>
> foo bar = { 1, 2 };
>
> I was thinking  that we should just have types function as named
> constructor functions.  There's precedent both in object-oriented languages
> and with Haskell's algebraic data types.  Now you can just use this
> expression wherever needed:
>
> foo(1, 2)
>
> Thoughts?  I'm reluctant to add new incompatibilities with Swift/K, but
> this seems like it would be really clunky otherwise.
>
> - Tim
>
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>
>
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