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

Chris Lattner clattner at nondot.org
Mon Nov 27 00:04:17 CST 2017

I’d like to formally propose the inclusion of user-defined dynamic member lookup types.

Here is my latest draft of the proposal:

An implementation of this design is available here:

The implementation is straight-forward and (IMO) non-invasive in the compiler.


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