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79a2ab0c8c
If base type of a unresolved member reference couldn't be determined (represented as a hole type), before recording a fix about lack of contextual information, let's make sure that hole originated in either base or result type of this reference, otherwise the problem is contextual e.g. generic parameter, which supposed to act as contextual type for a reference, couldn't be inferred.
49 lines
2.4 KiB
Swift
49 lines
2.4 KiB
Swift
// RUN: %target-typecheck-verify-swift
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func foo(_ a: [[UInt8]], _ p: [UnsafeRawPointer]) {
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foo(a, a) // expect-warning {{all paths through this function will call itself}}
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}
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// rdar://problem/44658089
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func takesPtr(_: UnsafePointer<UInt8>) {}
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func takesDoubleOptionalPtr(_ x: UnsafeRawPointer??) {}
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func takesMutableDoubleOptionalPtr(_ x: UnsafeMutableRawPointer??) {}
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func takesMutableDoubleOptionalTypedPtr(_ x: UnsafeMutablePointer<Double>??) {}
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func givesPtr(_ str: String) {
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takesPtr(UnsafePointer(str)) // expected-warning {{initialization of 'UnsafePointer<UInt8>' results in a dangling pointer}}
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// expected-note @-1 {{implicit argument conversion from 'String' to 'UnsafePointer<UInt8>' produces a pointer valid only for the duration of the call to 'init(_:)'}}
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// expected-note@-2 {{use the 'withCString' method on String in order to explicitly convert argument to pointer valid for a defined scope}}
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var i = 0
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var d = 0.0
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var arr = [1, 2, 3]
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// SR-9090: Allow double optional promotion for pointer conversions.
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takesDoubleOptionalPtr(&arr)
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takesDoubleOptionalPtr(arr)
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takesDoubleOptionalPtr(str)
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takesMutableDoubleOptionalPtr(&i)
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takesMutableDoubleOptionalPtr(&arr)
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takesMutableDoubleOptionalTypedPtr(&d)
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takesDoubleOptionalPtr(i) // expected-error {{cannot convert value of type 'Int' to expected argument type 'UnsafeRawPointer??'}}
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takesMutableDoubleOptionalPtr(arr) // expected-error {{cannot convert value of type '[Int]' to expected argument type 'UnsafeMutableRawPointer??'}}
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takesMutableDoubleOptionalTypedPtr(&i) // expected-error {{cannot convert value of type 'UnsafeMutablePointer<Int>' to expected argument type 'UnsafeMutablePointer<Double>'}}
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// expected-note@-1 {{arguments to generic parameter 'Pointee' ('Int' and 'Double') are expected to be equal}}
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}
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// SR12382
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func SR12382(_ x: UnsafeMutablePointer<Double>??) {}
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var i = 0
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SR12382(&i) // expected-error {{cannot convert value of type 'UnsafeMutablePointer<Int>' to expected argument type 'UnsafeMutablePointer<Double>'}}
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// expected-note@-1 {{arguments to generic parameter 'Pointee' ('Int' and 'Double') are expected to be equal}}
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//problem/68254165 - Bad diagnostic when using String init(decodingCString:) with an incorrect pointer type
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func rdar68254165(ptr: UnsafeMutablePointer<Int8>) {
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_ = String(decodingCString: ptr, as: .utf8) // expected-error {{generic parameter 'Encoding' could not be inferred}}
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}
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