[swift-evolution] Proposal proposal: @pure keyword

[Chris Lattner]

> On Jan 9, 2016, at 12:53 AM, Andrew Bennett via swift-evolution <swift-evolution at swift.org> wrote:
> 
> I'd like to discuss adding a @pure keyword, and see what it requires and how possible it is to  include.
> 
> I'd like to use the annotation @pure on functions, methods and closures.

FYI, this has come up before, please catch up on the thread:
https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20151214/003684.html <https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20151214/003684.html>

https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20151221/003900.html <https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20151221/003900.html>

-Chris

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