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7c705c3a75
CharacterView is now entirely redundant in Swift 4. Deprecate its use. This also allows us to schedule the unbreaking of String.CharacterView leakiness without a hard source break.
23 lines
1.3 KiB
Swift
23 lines
1.3 KiB
Swift
// RUN: %swift -typecheck -swift-version 4 %s -verify
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func testPopFirst() {
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var str = "abc"
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_ = str.popFirst() // expected-error{{'popFirst()' is unavailable: Please use 'first', 'dropFirst()', or 'Substring.popFirst()'}}
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_ = str.characters.popFirst() // expected-warning{{'characters' is deprecated: Please use String or Substring directly}}
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_ = str.unicodeScalars.popFirst() // expected-error{{'popFirst()' is unavailable: Please use 'first', 'dropFirst()', or 'Substring.UnicodeScalarView.popFirst()'}}
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var charView: String.CharacterView // expected-warning{{'CharacterView' is deprecated: Please use String or Substring directly}}
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charView = str.characters // expected-warning{{'characters' is deprecated: Please use String or Substring directly}}
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dump(charView)
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var substr = str[...]
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_ = substr.popFirst() // ok
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_ = substr.characters.popFirst() // expected-warning{{'characters' is deprecated: Please use String or Substring directly}}
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_ = substr.unicodeScalars.popFirst() // ok
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var charSubView: Substring.CharacterView // expected-warning{{'CharacterView' is deprecated: Please use String or Substring directly}}
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charSubView = substr.characters // expected-warning{{'characters' is deprecated: Please use String or Substring directly}}
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dump(charSubView)
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}
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