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f55ce19127
In situations where left-hand side requires value-to-optional
promotion which ends up in type mismatch let's not mention
optionals in the diagnostic because they are unrelated e.g.
```swift
func test(_: UnsafePointer<Int>??) {}
var value: Float = 0
test(&value)
```
In this example `value` gets implicitly wrapped into a double optional
before `UnsafePointer<Float>` could be matched against `UnsafePointer<Int>`
associated with the parameter.
Diagnostic is about generic argument mismatch `Float` vs. `Int`
and shouldn't mention any optionals.
44 lines
2.1 KiB
Swift
44 lines
2.1 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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