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[SR-9070] Variable shadowing inconsistency with guard #51571

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dduan opened this issue Oct 24, 2018 · 1 comment
Closed

[SR-9070] Variable shadowing inconsistency with guard #51571

dduan opened this issue Oct 24, 2018 · 1 comment
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compiler The Swift compiler in itself improvement

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@dduan
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dduan commented Oct 24, 2018

Previous ID SR-9070
Radar None
Original Reporter @dduan
Type Improvement
Status Resolved
Resolution Duplicate
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Improvement
Assignee None
Priority Medium

md5: 789f83147ce9df556416144efb03b152

duplicates:

  • SR-214 Swift 2: Guard let can shadow func param but not let-bound local constant

Issue Description:

In the following snippet, function f compiles but g won't. Intuitively, one would expect rules for shadowing an argument and a local variable to be the same.

g should compile.
@belkadan
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I'm not sure I necessarily agree that shadowing should be the same between parameters and locals. After all, this is allowed:

func test() {
  let x = 1
  do {
    let x = "abc"
    print(x)
  }
  print(x)
}
test()

which suggests that scopes are delimited by braces.

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