[swift-evolution] [Pitch] Support for pure functions. Part n + 1.

[Adrian Zubarev]

My suggestion is that -> would be the conditional arrow that can be both pure or impure. That would make @pure func foo(_ f: @pure (Int) -> Int) -> Int equivalent to func foo(_ f: (Int) ~> Int) -> Int. Plus depending on the implementation the compiler might be able to help and tell you that foo could use ~> instead.



-- 
Adrian Zubarev
Sent with Airmail

Am 17. Februar 2017 um 19:25:41, Anton Zhilin (antonyzhilin at gmail.com) schrieb:

Just let

@pure func foo(_ f: (Int) -> Int) -> Int
be the same as those two combined:

@pure func foo(_ f: @pure (Int) -> Int) -> Int
func foo(_ f: (Int) -> Int) -> Int
No need for anything like “re-pure” or  
≃>.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-evolution/attachments/20170217/2d5474d1/attachment.html>