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[SR-11664] Getting "Expression type '()' is ambiguous without more context" when using @propertyWrapper #54073

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swift-ci opened this issue Oct 24, 2019 · 5 comments
Closed

[SR-11664] Getting "Expression type '()' is ambiguous without more context" when using @propertyWrapper #54073

swift-ci opened this issue Oct 24, 2019 · 5 comments
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself property wrappers Feature: property wrappers type checker Area → compiler: Semantic analysis

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@swift-ci
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Previous ID SR-11664
Radar rdar://problem/56584397
Original Reporter RomanPodymov (JIRA User)
Type Bug
Status Closed
Resolution Done
Environment

Xcode 11.1, Swift 5.1.

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, PropertyWrappers, TypeChecker
Assignee RomanPodymov (JIRA)
Priority Medium

md5: 85608e7aafd274573da331f95bab48c9

relates to:

  • SR-11654 Optional wrapped property can't be passed to generic function

Issue Description:

Consider the following code:

protocol P {
    func f()
}
 
struct S: P {
    func f() { }
}
 
func f(p: P) {
    p.f()
}
 
class C {
    @Wrapper
    var s: S = S()
 
    func g() {
        f(p: s)
    }
}
 
@propertyWrapper
struct Wrapper {
    private let value: S
 
    public init(wrappedValue: S) {
        value = wrappedValue
    }
 
    var wrappedValue: S {
        return value
    }
}

As for me this code is correct. However getting Expression type '()' is ambiguous without more context for f(p: s). Temporal solution is to replace f(p: s) with f(p: s as P).
@belkadan
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Possibly the same underlying cause as SR-11654?

@swift-ci create

@theblixguy
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Works on master, so maybe it got fixed a while ago

@beccadax
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I reproduced this in Xcode 11.1 and 11.2 beta, but not with a master toolchain from earlier this month.

@typesanitizer
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Marking as resolved since it looks like this has been fixed on master. You can download a recent master snapshot toolchain from swift.org (https://swift.org/download/#snapshots) and check that it works correctly.

@swift-ci
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Comment by Roman Podymov (JIRA)

The issue is not reproducing in Swift 5.2/Xcode 11.4 beta.

@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. compiler The Swift compiler in itself property wrappers Feature: property wrappers type checker Area → compiler: Semantic analysis
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@belkadan @beccadax @theblixguy @typesanitizer @swift-ci