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[SR-7192] Conditional conformance with array/dictionary literals #49740

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swift-ci opened this issue Mar 13, 2018 · 2 comments
Closed

[SR-7192] Conditional conformance with array/dictionary literals #49740

swift-ci opened this issue Mar 13, 2018 · 2 comments
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself type checker Area → compiler: Semantic analysis

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@swift-ci
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Previous ID SR-7192
Radar rdar://problem/38461036
Original Reporter Vermeulen (JIRA User)
Type Bug
Status Resolved
Resolution Done
Environment

Xcode 9.3 beta 4 and the Swift version that comes with it (also tried the March 12 Swift 4.1 snapshot, same issue).

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

md5: 327e6fe39d120d90dd29c451b1b8edda

Issue Description:

struct Foo {}
protocol Bar {}

extension Array: Bar where Element == Foo {}

let foo = Foo()
let bar: Bar = [foo]           // "Contextual type `Bar` cannot be used with array literal"

let array = [foo]
let bar2: Bar = array          // works fine

let bar3: Bar = [foo] as [Foo] // also works fine

Similar to SR-6941 but not exactly the same. Not limited to array literals, the same issue arises with dictionary literals.
@belkadan
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The key point is that this does work with a non-conditional conformance. Thanks!

@swift-ci create

@huonw
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Mannequin

huonw mannequin commented Mar 22, 2018

Fixed in #15415 merged as 2f6ca48

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself type checker Area → compiler: Semantic analysis
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@belkadan @swift-ci