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[SR-3860] error: ambiguous use of operator '-' #46445

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krzyzanowskim opened this issue Feb 4, 2017 · 3 comments
Open

[SR-3860] error: ambiguous use of operator '-' #46445

krzyzanowskim opened this issue Feb 4, 2017 · 3 comments
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself regression swift 3.0 type checker Area → compiler: Semantic analysis

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@krzyzanowskim
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Previous ID SR-3860
Radar rdar://problem/30393457
Original Reporter @krzyzanowskim
Type Bug

Attachment: Download

Environment

Swift 3.0.2

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, 3.0Regression, TypeChecker
Assignee None
Priority Medium

md5: dc1a3e25eed7f5c5f470127841c056e3

Issue Description:

Given sample does not compile. It does compile for the "+" operation, though.

let arr:[UInt32] = [1,2,3]

_ = UInt32(1 - arr[Int(1)]) // error: ambiguous use of operator '-'
_ = UInt32(1 - arr[1])      // ok
Untitled 12.swift:4:14: error: ambiguous use of operator '-'
_ = UInt32(1 - arr[Int(1)]) // error: ambiguous use of operator '-'
             ^
Swift.-:1:13: note: found this candidate
public func -<T : Strideable>(lhs: T, rhs: T) -> T.Stride
            ^
Swift.-:1:13: note: found this candidate
public func -<T : _DisallowMixedSignArithmetic>(lhs: T, rhs: T) -> T._DisallowMixedSignArithmetic
            ^
@jckarter
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jckarter commented Feb 6, 2017

@swift-ci create

@belkadan
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belkadan commented Feb 7, 2017

Not a regression, at least?

@rintaro
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rintaro mannequin commented Feb 7, 2017

Looks like 3.0 regression.
This compiles in Swift 2.3.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself regression swift 3.0 type checker Area → compiler: Semantic analysis
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@jckarter @belkadan @krzyzanowskim @AnthonyLatsis