[swift-evolution] Proposal: Introduce User-defined "Dynamic Member Lookup" Types

[Slava Pestov]

Hi Chris,

> On Nov 28, 2017, at 8:54 PM, Chris Lattner via swift-evolution <swift-evolution at swift.org> wrote:
> 
> “post.author" always invokes the DynamicMemberLookupProtocol proposal.
> “post.author()” would invoke the “DynamicCallableWithKeywordsToo” hook in the dynamic callable proposal:
> https://gist.github.com/lattner/a6257f425f55fe39fd6ac7a2354d693d <https://gist.github.com/lattner/a6257f425f55fe39fd6ac7a2354d693d>
Elsewhere in Swift, it is generally the case that

foo.bar()

is equivalent to

let fn = foo.bar
fn()

Would this equivalence still hold with your proposal(s)?

Slava
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