| // RUN: %target-typecheck-verify-swift |
| |
| // XFAIL: linux |
| |
| import Foundation |
| |
| // Common pitfall: trying to subscript a string with integers. |
| func testIntSubscripting(s: String, i: Int) { |
| // FIXME swift-3-indexing-model: test new overloads of ..<, ... |
| _ = s[i] // expected-error{{'subscript' is unavailable: cannot subscript String with an Int, see the documentation comment for discussion}} |
| _ = s[17] // expected-error{{'subscript' is unavailable: cannot subscript String with an Int, see the documentation comment for discussion}} |
| _ = s[i...i] // expected-error{{subscript' is unavailable: cannot subscript String with a CountableClosedRange<Int>, see the documentation comment for discussion}} |
| _ = s[17..<20] // expected-error{{subscript' is unavailable: cannot subscript String with a CountableRange<Int>, see the documentation comment for discussion}} |
| _ = s[17...20] // expected-error{{subscript' is unavailable: cannot subscript String with a CountableClosedRange<Int>, see the documentation comment for discussion}} |
| |
| _ = s[Range(i...i)] // expected-error{{subscript' is unavailable: cannot subscript String with a Range<Int>, see the documentation comment for discussion}} |
| _ = s[Range(17..<20)] // expected-error{{subscript' is unavailable: cannot subscript String with a Range<Int>, see the documentation comment for discussion}} |
| _ = s[Range(17...20)] // expected-error{{subscript' is unavailable: cannot subscript String with a Range<Int>, see the documentation comment for discussion}} |
| |
| _ = s[CountableRange(i...i)] // expected-error{{subscript' is unavailable: cannot subscript String with a CountableRange<Int>, see the documentation comment for discussion}} |
| _ = s[CountableRange(17..<20)] // expected-error{{subscript' is unavailable: cannot subscript String with a CountableRange<Int>, see the documentation comment for discussion}} |
| _ = s[CountableRange(17...20)] // expected-error{{subscript' is unavailable: cannot subscript String with a CountableRange<Int>, see the documentation comment for discussion}} |
| |
| _ = s[ClosedRange(i...i)] // expected-error{{subscript' is unavailable: cannot subscript String with a ClosedRange<Int>, see the documentation comment for discussion}} |
| _ = s[ClosedRange(17..<20)] // expected-error{{subscript' is unavailable: cannot subscript String with a ClosedRange<Int>, see the documentation comment for discussion}} |
| _ = s[ClosedRange(17...20)] // expected-error{{subscript' is unavailable: cannot subscript String with a ClosedRange<Int>, see the documentation comment for discussion}} |
| |
| _ = s[CountableClosedRange(i...i)] // expected-error{{subscript' is unavailable: cannot subscript String with a CountableClosedRange<Int>, see the documentation comment for discussion}} |
| _ = s[CountableClosedRange(17..<20)] // expected-error{{subscript' is unavailable: cannot subscript String with a CountableClosedRange<Int>, see the documentation comment for discussion}} |
| _ = s[CountableClosedRange(17...20)] // expected-error{{subscript' is unavailable: cannot subscript String with a CountableClosedRange<Int>, see the documentation comment for discussion}} |
| } |
| |
| func testNonAmbiguousStringComparisons() { |
| let s1 = "a" |
| let s2 = "b" |
| var x = false // expected-warning {{variable 'x' was written to, but never read}} |
| x = s1 > s2 |
| x = s1 as String > s2 |
| } |
| |
| func testAmbiguousStringComparisons(s: String) { |
| let nsString = s as NSString |
| let a1 = s as NSString == nsString |
| let a2 = s as NSString != nsString |
| let a3 = s < nsString // expected-error{{'NSString' is not implicitly convertible to 'String'; did you mean to use 'as' to explicitly convert?}} {{24-24= as String}} |
| let a4 = s <= nsString // expected-error{{'NSString' is not implicitly convertible to 'String'; did you mean to use 'as' to explicitly convert?}} {{25-25= as String}} |
| let a5 = s >= nsString // expected-error{{'NSString' is not implicitly convertible to 'String'; did you mean to use 'as' to explicitly convert?}} {{25-25= as String}} |
| let a6 = s > nsString // expected-error{{'NSString' is not implicitly convertible to 'String'; did you mean to use 'as' to explicitly convert?}} {{24-24= as String}} |
| // now the other way |
| let a7 = nsString == s as NSString |
| let a8 = nsString != s as NSString |
| let a9 = nsString < s // expected-error{{'NSString' is not implicitly convertible to 'String'; did you mean to use 'as' to explicitly convert?}} {{20-20= as String}} |
| let a10 = nsString <= s // expected-error{{'NSString' is not implicitly convertible to 'String'; did you mean to use 'as' to explicitly convert?}} {{21-21= as String}} |
| let a11 = nsString >= s // expected-error{{'NSString' is not implicitly convertible to 'String'; did you mean to use 'as' to explicitly convert?}} {{21-21= as String}} |
| let a12 = nsString > s // expected-error{{'NSString' is not implicitly convertible to 'String'; did you mean to use 'as' to explicitly convert?}} {{21-21= as String}} |
| } |
| |
| func testStringDeprecation(hello: String) { |
| let hello2 = hello |
| .addingPercentEscapes(using: .utf8) // expected-warning{{'addingPercentEscapes(using:)' is deprecated}} |
| |
| _ = hello2? |
| .replacingPercentEscapes(using: .utf8) // expected-warning{{'replacingPercentEscapes(using:)' is deprecated}} |
| } |
| |
| // Positive and negative tests for String collection types. Testing the complete |
| // set of conformance just in case protocol hierarchy changes. |
| func acceptsCollection<C: Collection>(_: C) {} |
| func acceptsBidirectionalCollection<C: BidirectionalCollection>(_: C) {} |
| func acceptsRandomAccessCollection<C: RandomAccessCollection>(_: C) {} |
| |
| func testStringCollectionTypes(s: String) { |
| acceptsCollection(s.utf8) |
| acceptsBidirectionalCollection(s.utf8) |
| acceptsRandomAccessCollection(s.utf8) // expected-error{{argument type 'String.UTF8View' does not conform to expected type 'RandomAccessCollection'}} |
| |
| acceptsCollection(s.utf16) |
| acceptsBidirectionalCollection(s.utf16) |
| acceptsRandomAccessCollection(s.utf16) // expected-error{{argument type 'String.UTF16View' does not conform to expected type 'RandomAccessCollection'}} |
| |
| acceptsCollection(s.unicodeScalars) |
| acceptsBidirectionalCollection(s.unicodeScalars) |
| acceptsRandomAccessCollection(s.unicodeScalars) // expected-error{{argument type 'String.UnicodeScalarView' does not conform to expected type 'RandomAccessCollection'}} |
| |
| acceptsCollection(s) |
| acceptsBidirectionalCollection(s) |
| acceptsRandomAccessCollection(s) // expected-error{{argument type 'String' does not conform to expected type 'RandomAccessCollection'}} |
| } |