[swift-evolution] Proposal: label-only constructors

[ilya]

> There is no "parameter" to pass here; in particular the user should not
be expected to know off the top of their head what the key size for
Curve25519 is.

You can easily call a private parametrized init from a class function
though.


> The trailing colon gives me some anxiety; I feel like it wants something
to follow it.

Sure, it's not the most beautiful construct, but it unambiguously
identifies the preceding token as a label name.

On Sun, Dec 13, 2015 at 16:09 Drew Crawford <drew at sealedabstract.com> wrote:

>
> On Dec 13, 2015, at 7:03 AM, ilya <ilya.nikokoshev at gmail.com> wrote:
>
> (1) Isn't using a class function just one more symbol?
>
>
> No, a class/static function is not the same as an initializer.  e.g., a
> class function cannot assign to a let ivar.
>
> (2) Wouldn't this syntax be more logical:
> Key {
> init(forRSA: Void) { /* */ }
> }
>
> Key(forRSA:)
>
>
> Maybe.  The trailing colon gives me some anxiety; I feel like it wants
> something to follow it.
>
>
>
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