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[SR-5584] KeyPath error: type 'R' has no subscript members #48156

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dabrahams opened this issue Jul 30, 2017 · 2 comments
Open

[SR-5584] KeyPath error: type 'R' has no subscript members #48156

dabrahams opened this issue Jul 30, 2017 · 2 comments
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself diagnostics QoI Bug: Diagnostics Quality of Implementation type checker Area → compiler: Semantic analysis

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@dabrahams
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Previous ID SR-5584
Radar rdar://problem/33615754
Original Reporter @dabrahams
Type Bug
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, DiagnosticsQoI, TypeChecker
Assignee None
Priority Medium

md5: 52d8e2405f4d21c6c01060794b6be5de

is duplicated by:

  • SR-7416 Near miss diagnostics for key path subscript

relates to:

  • SR-10826 can we make this keyPath subscript error message better?

Issue Description:

This looks like it should compile but doesn't. Turns out I misspelled the argument label to the subscript; it should be keyPath.

struct X {
  let y = 3
}
let p = \X.y
let r = X()
let q = r[keypath: p] // error: type 'X' has no subscript members

func apply<R,V>(_ path: KeyPath<R,V>, to root: R) -> V {
  return root[keypath: path] // error: type 'R' has no subscript members
}
@dabrahams
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@swift-ci create

@swift-ci
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swift-ci commented Dec 1, 2017

Comment by Matias Pequeno (JIRA)

`s/keypath/keyPath/g`

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself diagnostics QoI Bug: Diagnostics Quality of Implementation type checker Area → compiler: Semantic analysis
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