[swift-evolution] [Pitch] Custom Namespaces

[Howard Lovatt]

Yes something in this space might be useful, but, and this is a significant
but, we do have modules and files to break code into. So it wouldn't be a
top priority.

On Wednesday, 30 March 2016, Niels Andriesse via swift-evolution <
swift-evolution at swift.org> wrote:

> At the moment, it's not possible to define custom namespaces. They can be
> emulated using static members on an enum:
>
> enum Foo {
>   static var bar: Bar
>   static func baz() { }
> }
>
> This is not ideal, because:
>
>    - The case shown above is semantically speaking obviously not an enum and
>    shouldn't be presented as such.
>    - The members are required to be static unnecessarily.
>    - Not all top-level declarations can be nested like this (e.g.
>    protocols).
>    - If we allow namespaces to be reused in different files within the
>    same module, this could potentially be used as a custom scope for access
>    control (e.g. using the proposed private(...) syntax, so in this case
>    private(Foo)).
>
> Are there any plans to allow custom namespaces (for example as shown
> below)?
>
> namespace Foo {
>   var bar: Bar
>   func baz() { }
> }
>
> Alternatively, a similar situation could be achieved by introducing
> submodules.
>


-- 
-- Howard.
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