[swift-users] Misleading? cannot subscript a value of type 'inout [PathPoint]' with optional field

[Rick Mann]

Done: https://bugs.swift.org/browse/SR-3190

Thanks!

> On Nov 11, 2016, at 15:23 , Jordan Rose <jordan_rose at apple.com> wrote:
> 
> Hi, Rick. The error seems to be a little better in master:
> 
> <stdin>:20:11: error: cannot convert value of type 'CGPoint?' to expected argument type 'inout CGPoint'
> points[0].anchorPt += dv
> ~~~~~~~~~~^~~~~~~~
> 
> but that's still not great. So, yes, please do file a bug at bugs.swift.org.
> 
> Thank you!
> Jordan
> 
>> On Nov 11, 2016, at 13:29, Rick Mann via swift-users <swift-users at swift.org> wrote:
>> 
>> I think the error I'm getting here is misleading. Should I file a bug?
>> 
>> import CoreGraphics
>> 
>> func
>> +=(inLHS : inout CGPoint, inRHS : CGPoint)
>> {
>>    inLHS.x += inRHS.x
>>    inLHS.y += inRHS.y
>> }
>> 
>> struct
>> PathPoint
>> {
>>    var    anchorPt:    CGPoint?
>> }
>> 
>> var points = [PathPoint()]
>> 
>> let dv = CGPoint(x: 0, y: 0)
>> points[0].anchorPt = dv
>> points[0].anchorPt += dv
>> 
>> 
>> Playground execution failed: error: MyPlayground.playground:17:7: error: cannot subscript a value of type 'inout [PathPoint]' (aka 'inout Array<PathPoint>')
>> points[0].anchorPt += dv
>> ~~~~~~^
>> 
>> 
>> 
>> -- 
>> Rick Mann
>> rmann at latencyzero.com
>> 
>> 
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>> https://lists.swift.org/mailman/listinfo/swift-users
> 


-- 
Rick Mann
rmann at latencyzero.com