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

[Jacob Williams]

> On Dec 4, 2017, at 11:05 AM, Dave DeLong via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Hi Chris,
> 
> We do the Swift integration with Objective-C via modules. Why wouldn’t that approach work with Python? Or if it would, why would we favor this dynamic member lookup over importing a Python API via a module?
> 

My understanding is that we would then have to write modules for each and every dynamic language people would want to import. It would take a lot more time/maintenance than this approach which theoretically allows for any dynamic language to become interoperable with much less effort and very little maintenance.

> Dave
> 
>> On Nov 26, 2017, at 11:04 PM, Chris Lattner via swift-evolution <swift-evolution at swift.org> wrote:
>> 
>> I’d like to formally propose the inclusion of user-defined dynamic member lookup types.
>> 
>> Here is my latest draft of the proposal:
>> https://gist.github.com/lattner/b016e1cf86c43732c8d82f90e5ae5438
>> https://github.com/apple/swift-evolution/pull/768
>> 
>> An implementation of this design is available here:
>> https://github.com/apple/swift/pull/13076
>> 
>> The implementation is straight-forward and (IMO) non-invasive in the compiler.
>> 
>> -Chris
>> 
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