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cda3cda132
Instead of making an undo() do an infer(), let's record fine-grained changes about what was retracted, and directly re-insert the same elements into the data structures.
20 lines
743 B
Swift
20 lines
743 B
Swift
// RUN: %target-typecheck-verify-swift
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// https://github.com/apple/swift/issues/46000
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struct DispatchData {
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let ptr: UnsafePointer<UInt8>
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func withUnsafeBytes<Result, ContentType>(body: (UnsafePointer<ContentType>) throws -> Result) rethrows -> Result { try body(ptr as! UnsafePointer<ContentType>) }
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}
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struct Data {}
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extension DispatchData {
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func asFoundationData<T>(execute: (Data) throws -> T) rethrows -> T {
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return try withUnsafeBytes { (ptr: UnsafePointer<Int8>) -> Void in
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// expected-error@-1 {{cannot convert return expression of type 'Void' to return type 'T'}}
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let data = Data()
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return try execute(data) // expected-error {{cannot convert value of type 'T' to closure result type 'Void'}}
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}
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}
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}
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