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[SR-10001] Swift 4.0 WritableKeyPath change Immutable value #52404

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swift-ci opened this issue Feb 26, 2019 · 1 comment
Closed

[SR-10001] Swift 4.0 WritableKeyPath change Immutable value #52404

swift-ci opened this issue Feb 26, 2019 · 1 comment
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior.

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@swift-ci
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Previous ID SR-10001
Radar None
Original Reporter jkd (JIRA User)
Type Bug
Status Resolved
Resolution Duplicate

Attachment: Download

Environment

swift 4.0 xcode10.1

Additional Detail from JIRA
Votes 0
Component/s
Labels Bug
Assignee None
Priority Medium

md5: 2467d443fac596d2ce87215ba390028d

duplicates:

  • SR-6502 WritableKeyPath allows writing to immutable properties

Issue Description:

I use KeyPath class as! WritableKeyPath class can change Immutable value

struct Test{
let a : String = "1"
}
let keyPath : WritableKeyPath<Test,String> = \Test.a as! WritableKeyPath<Test, String>
var t : Test = Test()
t.a // "1"
t[keyPath : keyPath] = "2"
t.a // "2"
@belkadan
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Fixed in Swift 5!

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior.
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@belkadan @swift-ci