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24 lines
1.0 KiB
Swift
24 lines
1.0 KiB
Swift
// RUN: %target-swift-frontend -typecheck -swift-version 4 %s -verify
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func testPopFirst() {
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var str = "abc"
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var charView: String.CharacterView // expected-warning{{'CharacterView' is deprecated: Please use String directly}}
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charView = str.characters // expected-warning{{'characters' is deprecated: Please use String 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 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 Substring directly}}
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charSubView = substr.characters // expected-warning{{'characters' is deprecated: Please use Substring directly}}
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dump(charSubView)
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var _ = String(str.utf8) ?? "" // expected-warning{{left side of nil coalescing operator '??' has non-optional type 'String', so the right side is never used}}
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var _: String = String(str.utf8) // ok
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}
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