[swift-evolution] [Pre-Proposal-Discussion] Union Type - Swift 4

[Cao, Jiannan]

Swift evolution seems not an evolution. 


I'll leave this mail list since this is not a good proposal environment. 
Typescript and other language community is more open to new idea. Swift-evolution is just a weird community. 


You just accept what you like and what you want. Is this called swift-evolution or proposal?


Proposal is for a long time standard, not just for next version of your shame release.


在 2016-08-11 13:18:54，"Chris Lattner" <clattner at apple.com> 写道：


On Aug 10, 2016, at 8:15 PM, Xiaodi Wu via swift-evolution <swift-evolution at swift.org> wrote:


I don't know if the core team feels differently now with respect to Swift 4, but union types are listed as a "commonly rejected change":

https://github.com/apple/swift-evolution/blob/master/commonly_proposed.md



There is no change in opinion here.  This topic is also out of scope for Swift 4 stage 1 in any case.


-Chris
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