[swift-evolution] [Proposal][Discussion] Modular Swift

Brent Royal-Gordon brent at architechies.com
Tue Feb 21 20:49:40 CST 2017

> On Feb 21, 2017, at 6:43 PM, Robert Widmann <devteam.codafi at gmail.com> wrote:
> That is not what this proposal requires.  A public API is ripe for re(export), but if the parent wishes to communicate with its children without exporting across the module boundary, see the definition of `internal`.

I'm not sure whether I'm misunderstanding or we're talking past each other.

Let me state this really simply. You have some code in a top-level module, `MyMod`:

	import MyMod.Submodule
	func foo() {

And you have some other code in a submodule:

	module Submodule {
		??? func bar() {

And then—perhaps in a separate file—you have some other code in an extension of the submodule:

	extension Submodule {		
		??? func baz() {

What access modifiers do I put on `bar()` and `baz()` so that `MyMod` can access `bar()` but not `baz()`, and code outside `MyMod` can access neither `bar()` nor `baz()`?

Brent Royal-Gordon

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