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82c076c9d3
C++ foreign reference types have custom reference counting mechanisms, so they cannot conform to `AnyObject`. Currently Swift's type system treats C++ FRTs as `AnyObject`s on non-Darwin platforms, which is incorrect. This change makes sure the behavior is consistent with Darwin platform, i.e. a cast of C++ FRT to `AnyObject` is rejected by the typechecker. rdar://136664617
27 lines
847 B
Swift
27 lines
847 B
Swift
// RUN: rm -rf %t
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// RUN: split-file %s %t
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// RUN: %target-swift-frontend -typecheck -verify -verify-ignore-unknown -I %t/Inputs %t/test.swift -enable-experimental-cxx-interop
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//--- Inputs/module.modulemap
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module Test {
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header "test.h"
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requires cplusplus
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}
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//--- Inputs/test.h
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struct __attribute__((swift_attr("import_reference")))
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__attribute__((swift_attr("retain:immortal")))
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__attribute__((swift_attr("release:immortal"))) Empty {
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static Empty *create() { return new Empty(); }
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};
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//--- test.swift
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import Test;
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public func test(_ _: AnyObject) {}
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// TODO: make this a better error.
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test(Empty.create()) // expected-error {{type of expression is ambiguous without a type annotation}}
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test([Empty.create()][0]) // expected-error {{argument type 'Any' expected to be an instance of a class or class-constrained type}}
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