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34f8670d2a
This PR migrates instance member on type and type member on instance diagnostics handling to use the new diagnostics framework (fixes) and create more reliable and accurate diagnostics in such scenarios.
50 lines
2.2 KiB
Swift
50 lines
2.2 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %{python} %utils/split_file.py -o %t %s
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// RUN: %target-swift-frontend -typecheck -primary-file %t/swift4.swift %t/common.swift -verify -swift-version 4
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// BEGIN common.swift
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protocol P1 {
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static func p1() -> Int
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}
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protocol P2 {
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static var p2: Int { get }
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}
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// BEGIN swift3.swift
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// Warning for mistakenly accepted protocol composition production.
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func foo(x: P1 & Any & P2.Type?) {
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// expected-warning @-1 {{protocol-constrained type with postfix '.Type' is ambiguous and will be rejected in future version of Swift}} {{13-13=(}} {{26-26=)}}
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let _: (P1 & P2).Type? = x
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let _: (P1 & P2).Type = x!
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let _: Int = x!.p1()
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let _: Int? = x?.p2
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}
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// Type expression
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func bar() -> ((P1 & P2)?).Type {
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let x = (P1 & P2?).self
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// expected-warning @-1 {{protocol-constrained type with postfix '?' is ambiguous and will be rejected in future version of Swift}} {{12-12=(}} {{19-19=)}}
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return x
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}
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// Non-ident type at non-last position are rejected anyway.
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typealias A1 = P1.Type & P2 // expected-error {{non-protocol, non-class type 'P1.Type' cannot be used within a protocol-constrained type}}
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// BEGIN swift4.swift
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func foo(x: P1 & Any & P2.Type?) { // expected-error {{non-protocol, non-class type 'P2.Type?' cannot be used within a protocol-constrained type}}
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let _: (P1 & P2).Type? = x // expected-error {{cannot convert value of type 'P1' to specified type '(P1 & P2).Type?'}}
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let _: (P1 & P2).Type = x! // expected-error {{cannot force unwrap value of non-optional type 'P1'}}
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let _: Int = x!.p1() // expected-error {{cannot force unwrap value of non-optional type 'P1'}} expected-error {{static member 'p1' cannot be used on instance of type 'P1'}}
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let _: Int? = x?.p2 // expected-error {{cannot use optional chaining on non-optional value of type 'P1'}}
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// expected-error@-1 {{value of type 'P1' has no member 'p2'}}
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}
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func bar() -> ((P1 & P2)?).Type {
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let x = (P1 & P2?).self // expected-error {{non-protocol, non-class type 'P2?' cannot be used within a protocol-constrained type}}
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return x // expected-error {{cannot convert return expression}}
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}
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typealias A1 = P1.Type & P2 // expected-error {{non-protocol, non-class type 'P1.Type' cannot be used within a protocol-constrained type}}
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