[swift-evolution] Keyword Discoverability

[John Joyce]

Hello all

It feels like Swift has some risk of going the direction of C++ at times. By that I mean complexity creep. 
Increasingly nuanced scoping results in more keywords and constructs. 
Useful and good but increasingly complex and steepening learning curve. 

I'd like to kick off discussion of ways to increase discoverability. 

One thought is tools.  
In thinking about contextual completions like Xcode's Open Quickly or the universal field thing in Sublime, it sure seems like some way to invoke a list of keywords and constructs available-in-the-current-scope would be helpful. 

Thoughts ?