Open Radar

 
Summary:
I'm writing a simple predicate using closures:

let isSpace:Character -> Bool = { c in
    c == " " || (c == "\n" || (c == "\r" || c == "\t")) }

After initiating a build, the compiler hangs for a few seconds and then warns:

Tokenizer.swift:98:33: Expression was too complex to be solved in reasonable time; consider breaking up the expression into distinct sub-expressions

If I remove two of the subexpressions its okay. The third one tends to break it.

Steps to Reproduce:
1. Start a new project and choose console app
2. In Main add the line above so that main.swift looks like

import Foundation

print("Hello, World!")

let isSpace:Character -> Bool = { c in
    c == " " || (c == "\n" || (c == "\r" || c == "\t")) }

I get the warning.

I can work around this by adding explicitly types

let isSpace:Character -> Bool = { (c:Character) -> Bool in
    c == " " || c == "\n" || c == "\r" || c == "\t" }


Expected Results:


Actual Results:


Version:
Xcode 7 beta 4 (7a165t)
OS X 10.10.4

Notes:


Configuration:
As far as I know it's reproducible in every code file.

Attachments: