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[TypeChecker] NFC: Add a test-case for rdar://problem/22046487 #28575

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Merged
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Dec 5, 2019
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[TypeChecker] NFC: Add a test-case for rdar://problem/22046487 #28575

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11 changes: 11 additions & 0 deletions test/Generics/class_constraint.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -45,3 +45,14 @@ where T.B.A: AnyObject, U.B: AnyObject, T.B == T.B.A, U.B.A == U.B {
requiresAnyObject(t.b.a)
requiresAnyObject(u.b.a)
}

func test_class_constraint_diagnostics_with_contextual_type() {
func foo<T : AnyObject>(_: AnyObject) -> T {} // expected-note 2 {{where 'T' = 'P'}}

class A : P {}

// TODO(diagnostics): We could also add a note here that protocols do not conform to themselves

let _: P = foo(A() as AnyObject) // expected-error {{local function 'foo' requires that 'P' be a class type}}
let _: P = foo(A()) // expected-error {{local function 'foo' requires that 'P' be a class type}}
}