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64e0e1859e
Add a deprecation warning for use of popFirst even with -swift-version 3, as it's prone to leaks under the old model. Test cases added.
15 lines
677 B
Swift
15 lines
677 B
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() // FIXME: deprecate CharacterView. This call currently gets paired with default popFirst from Collection :-(
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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 substr = str[...]
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_ = substr.popFirst() // ok
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_ = substr.characters.popFirst() // ok
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_ = substr.unicodeScalars.popFirst() // ok
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}
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