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This makes diagnostics more verbose and accurate, because it's possible to distinguish how many parameters there are based on the message itself. Also there are multiple diagnostic messages in a format of `<descriptive-kind> <decl-name> ...` that get printed as e.g. `subscript 'subscript'` if empty labels are omitted.
19 lines
496 B
Swift
19 lines
496 B
Swift
// RUN: %target-typecheck-verify-swift
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protocol P {}
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struct S<V> where V: P { // expected-note {{where 'V' = 'Double'}}
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var value: V
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}
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struct A {
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subscript<T>(_ v: S<T>) -> A { // expected-note {{where 'T' = 'Double'}}
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fatalError()
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}
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}
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func foo(_ v: Double) {
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_ = A()[S(value: v)]
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// expected-error@-1 {{subscript 'subscript(_:)' requires that 'Double' conform to 'P'}}
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// expected-error@-2 {{referencing initializer 'init(value:)' on 'S' requires that 'Double' conform to 'P'}}
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}
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