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[SR-13132] Function builder can no longer have its generic parameter inferred #55578

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hamishknight opened this issue Jul 1, 2020 · 2 comments
Closed

[SR-13132] Function builder can no longer have its generic parameter inferred #55578

hamishknight opened this issue Jul 1, 2020 · 2 comments
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@CodaFi
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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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@hamishknight
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Previous ID SR-13132
Radar rdar://problem/65116204
Original Reporter @hamishknight
Type Bug
Status Resolved
Resolution Done
Environment

Swift version 5.3-dev (LLVM 609d16e, Swift d5a549a)
Target: x86_64-apple-darwin18.5.0

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, TypeChecker
Assignee @CodaFi
Priority Medium

md5: de4ad55fb68730b5bcb409c48f4a1eae

Issue Description:

The following compiles on 5.2 and 5.3, but no longer compiles on master:

@_functionBuilder
struct IDBuilder<T> {
  static func buildBlock(_ x: T) -> T { x }
}

func foo<T>(@IDBuilder<T> fn: () -> T) {}

foo { // error: type of expression is ambiguous without more context
  ""
}
@typesanitizer
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@CodaFi
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CodaFi commented Jul 15, 2020

#32893

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
This issue was closed.
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@CodaFi CodaFi

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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@CodaFi @typesanitizer @hamishknight