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We need to be very careful while matching types to test whether a fix is applicable or not to avoid adding extraneous fixes and failing the path early. This is a temporary workaround, the real fix would be to let `matchTypes` to propagate `TMF_ApplyingFixes` down. Resolves: rdar://154010220 Resolves: https://github.com/swiftlang/swift/issues/82397
104 lines
2.6 KiB
Swift
104 lines
2.6 KiB
Swift
// RUN: %target-typecheck-verify-swift
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struct X { }
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struct Y { }
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protocol Z { }
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struct WithOverloadedSubscript {
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subscript(i: Int) -> X {
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get {}
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set {}
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}
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subscript(i: Int) -> Y {
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get {}
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set {}
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}
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}
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struct WithProtocolSubscript {
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subscript(i: Int) -> Z {
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get {}
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set {}
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}
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}
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func test_assign() {
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var a = WithOverloadedSubscript()
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a[0] = X()
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a[0] = Y()
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}
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var i: X
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var j: X
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var f: Y
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func getXY() -> (X, Y) {}
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var ift : (X, Y)
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var ovl = WithOverloadedSubscript()
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var ps = WithProtocolSubscript()
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var slice: [X]
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i = j
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(i, f) = getXY()
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(i, f) = ift
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(i, f) = (i, f)
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(ovl[0], ovl[0]) = ift
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(ovl[0], ovl[0]) = (i, f)
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(_, ovl[0]) = (i, f)
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(ovl[0], _) = (i, f)
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_ = (i, f)
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slice[7] = i
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slice[7] = f // expected-error{{cannot assign value of type 'Y' to subscript of type 'X'}}
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slice[7] = nil // expected-error{{'nil' cannot be assigned to subscript of type 'X'}}
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ps[7] = i // expected-error{{cannot assign value of type 'X' to subscript of type 'any Z'}}
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slice[7] = _ // expected-error{{'_' can only appear in a pattern or on the left side of an assignment}}
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func value(_ x: Int) {}
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func value2(_ x: inout Int) {}
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value2(&_) // expected-error{{'_' can only appear in a pattern or on the left side of an assignment}}
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value(_) // expected-error{{'_' can only appear in a pattern or on the left side of an assignment}}
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// <rdar://problem/23798944> = vs. == in Swift if string character count statement causes segmentation fault
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func f23798944() {
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let s = ""
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if s.count = 0 { // expected-error {{use of '=' in a boolean context, did you mean '=='?}}
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// expected-error@-1{{cannot assign to property: 'count' is a get-only property}}
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}
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}
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// https://github.com/apple/swift/issues/46094
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do {
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.x = 0 // expected-error {{type 'Int' has no member 'x'}}
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}
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// https://github.com/apple/swift/issues/44162
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func returnsVoid() {}
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_ = returnsVoid() // expected-warning {{using '_' to ignore the result of a Void-returning function is redundant}}{{1-5=}}
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// https://github.com/apple/swift/issues/56396
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class С_56396 {
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var callback: ((С_56396) -> Void)!
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func setCallback(_ callback: @escaping (Self) -> Void) {
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self.callback = callback // expected-error {{cannot assign value of type '(Self) -> Void' to type '(С_56396) -> Void'}}
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}
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}
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// https://github.com/swiftlang/swift/issues/82397
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func testFunctionAssignsWithOptionals(fn: @escaping () -> () -> Void) {
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let _: (() -> () -> Void)? = fn
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let _: (() -> () -> Void)?? = fn
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class Super {}
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class Sub: Super {}
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let b: () -> () -> Sub = { { return Sub() } }
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let _: (() -> () -> Super)? = b
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let _: (() -> () -> Super)?? = b
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}
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