For the record, I will paste here the answer I have received on StackOverflow.
It adds some useful tips to the info provided by Alex. In short,
Swift modules are somehow equivalent to Java packages, and Swift frameworks to
Java .jars (if we don't get too formal);
Swift (sub)modules can be visible to clients and the latter can import them
much as Java sub-packages are imported;
Swift (sub)modules are not implicitely defined by the source code folders
layout, but by meta-files and tooling that are external to the source code
(contrarily to Java).
https://stackoverflow.com/questions/46228517/swift-submodules-what-are-they-exactly
Cheers,
David
Sent with [ProtonMail](https://protonmail.com) Secure Email.
> -------- Original Message --------
> Subject: Re: [swift-users] noob question about modules
> Local Time: 14 September 2017 12:26 PM
> UTC Time: 14 September 2017 10:26
> From: swift-users@swift.org
> To: alb...@apple.com
> swift-users@swift.org
>
> Thanks much, Alex.
>
> But how do you physically partition the namespace within a module, if not by
> sub-folders?
>
> I am not sure whether the following example is, by definition, of a submodule
> that one could import by writing "import Cacao.StyleKit":
>
> Https://github.com/PureSwift/Cacao/tree/master/Sources/Cacao/StyleKit
>
> Sent from ProtonMail mobile
>
> -------- Original Message --------
> On 13.09.2017, 10:23, Alex Blewitt < alb...@apple.com> wrote:
>
>> No, submodules in Swift bear little relation to sub packages in Java. It's
>> really just a way of partitioning the namespace within a single module. Nor
>> is there any relation between the path and the name of the module either.
>>
>> Alex
>>
>>> On 12 Sep 2017, at 22:41, blaster_in_black via swift-users <
>>> swift-users@swift.org> wrote:
>>>
>>> Hi,
>>>
>>> I am beginning with Swift 4 (coming from the Java world) but I do not have
>>> yet a Swift development environment to experiment with. Therefore my
>>> question(s) might sound a bit silly. Unfortunately, I haven't been able to
>>> answer them by reading the online Language Guide.
>>>
>>> 1) What makes a submodule? I can see online examples about how to import
>>> them, but not how to create one or any other further details about them.
>>> Are they like Java packages inside a jar? Do their hierarchical name (
>>> prefix1.prefix2. ... .submodulename) reflect a path tree on the filesystem
>>> (/ prefix1/prefix2. ... /submodulename), just as it happens with Java
>>> packages?
>>> 2) Can two different submodules within a single module export two different
>>> classes under a single class name? Like module.submodule1.MyType and
>>> module.submodule2.myType.
>>>
>>> Thanks in advance.
>>>
>>> David
>>>
>>> _______________________________________________
>>> swift-users mailing list
>>> swift-users@swift.org
>>> https://lists.swift.org/mailman/listinfo/swift-users
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