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This fixes a crash at runtime when destroying a Swift array of values of a C++ foreign reference type. Swift optimizes the amount of metadata emitted for `_ContiguousArrayStorage<Element>` by reusing `_ContiguousArrayStorage<AnyObject>` whenever possible (see `getContiguousArrayStorageType`). However, C++ foreign reference types are not `AnyObject`s, since they have custom retain/release operations. This change disables the `_ContiguousArrayStorage` metadata optimization for C++ reference types, which makes sure that `swift_arrayDestroy` will call the correct release operation for elements of `[MyCxxRefType]`. rdar://127154770
33 lines
984 B
Swift
33 lines
984 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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// REQUIRES: objc_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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#include <stdlib.h>
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inline void* operator new(unsigned long, void* p) { return p; }
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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 (malloc(sizeof(Empty))) 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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