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39 lines
1.2 KiB
Swift
39 lines
1.2 KiB
Swift
// RUN: %target-typecheck-verify-swift
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class C : Hashable {
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var x = 0
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func hash(into hasher: inout Hasher) {
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hasher.combine(x)
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}
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}
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func == (x: C, y: C) -> Bool { return true }
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class D : C {}
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// Test dictionary upcasts
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var dictCC = Dictionary<C, C>()
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var dictCD = Dictionary<C, D>()
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var dictDC = Dictionary<D, C>()
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var dictDD = Dictionary<D, D>()
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dictCC = dictCD
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dictCC = dictDC
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dictCC = dictDD
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dictCD = dictDD
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dictCD = dictCC // expected-error{{cannot assign value of type '[C : C]' to type '[C : D]'}}
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// expected-note@-1 {{arguments to generic parameter 'Value' ('C' and 'D') are expected to be equal}}
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dictDC = dictDD
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dictDC = dictCD // expected-error {{cannot assign value of type '[C : D]' to type '[D : C]'}}
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// expected-note@-1 {{arguments to generic parameter 'Key' ('C' and 'D') are expected to be equal}}
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// expected-note@-2 {{arguments to generic parameter 'Value' ('D' and 'C') are expected to be equal}}
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dictDD = dictCC // expected-error{{cannot assign value of type '[C : C]' to type '[D : D]'}}
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// expected-note@-1 {{arguments to generic parameter 'Key' ('C' and 'D') are expected to be equal}}
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// expected-note@-2 {{arguments to generic parameter 'Value' ('C' and 'D') are expected to be equal}}
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