I made a Swift extension to use frames like I would on iOS but Can't compile while using it

Question

I made this extension to NSView to make it easier to work with views.

import Cocoa

public extension NSView {
    var invertedFrame: NSRect {
    get {
        return NSRect(x: frame.origin.x,
                      y: superview.bounds.height - frame.origin.y,
                  width: bounds.size.width,
                 height: bounds.size.height)
    }
    set {

        self.frame = NSRect(x: newValue.origin.x,
                            y: superview.bounds.height - newValue.origin.y - newValue.height,
                        width: newValue.width,
                       height: newValue.height)
    }
    }
}

But whenever I try to use it I get the compile time error ...

Command /Applications/Xcode6-Beta4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift failed with exit code 254

However if I cut and paste the computed variable into a class implementation it works fine.

I am not sure why this is. Is there something wrong with my code? Can anyone make this work?

full error message? and [file a bug report](http://bugreport.apple.com/) because compile cannot crash — Bryan Chen, Jul 25 '14 at 01:26
Sorry if I was unclear but I am using this extension for Mac OSX apps in order to make the coordinate system work like it does on iOS — o.uinn, Jul 25 '14 at 01:31

score 0 · Answer 1 · answered Aug 03 '14 at 19:35

0

Your property setter doesn't declare newValue as a method parameter, but instead of telling you that, the compiler is clearly crashing. Remember that a bare set is found only in a protocol property declaration.

answered Aug 03 '14 at 19:35

NRitH

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newValue is the name given automatically if you don't specify it as a parameter. – o.uinn Aug 03 '14 at 19:40
Well, I'll be damned. TIL. Thanks. – NRitH Aug 03 '14 at 23:24

score 0 · Accepted Answer · answered Aug 11 '14 at 19:06

0

I'm not sure which update fixed this, but in Xcode 6 beta 5 it works fine. So it was just a compiler bug.

answered Aug 11 '14 at 19:06

o.uinn

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I made a Swift extension to use frames like I would on iOS but Can't compile while using it

2 Answers2