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Christopher Di Bella
f7cd39428e
This change partially implements [PR #7362], which revises how objects are destroyed. It is a partial implementation for two reasons: 1. This change moves `Destroy.Op`'s current behaviour into `Destroy.SubobjectDestroy`, but it doesn't add support for objects with non-trivial destruction. 2. `Destroy.SubobjectDestroy` is a workaround for `require impls SubobjectDestroy`. We aren't able to use the latter until the dependents add their requirements' implementations to their own witness tables. [PR #7362]: https://github.com/carbon-language/carbon-lang/pulls/7362
36 lines
1.1 KiB
Plaintext
36 lines
1.1 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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package Core library "prelude/destroy";
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// TODO: uncomment when `require impls` adds a witness table entry.
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// interface SubobjectDestroy {
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// final fn Op(ref self) = "subobject.destroy";
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// }
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interface Destroy {
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// TODO: uncomment when `require impls` adds a witness table entry.
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// require impls SubobjectDestroy;
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// TODO: change `Self` to `partial Self`.
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fn Op(ref self);
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// TODO: remove when `require impls` adds a witness table entry.
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final fn SubobjectDestroy(unused ref self) {
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// This function body is ignored by the toolchain. We can't use
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// a built-in because the compiler treats it as an error. We
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// should address this at some point, but it's not a high
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// priority right now.
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}
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final fn SelfDestruct(ref self) {
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self.Op();
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self.SubobjectDestroy();
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}
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}
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// TODO: uncomment when `require impls` adds a witness table entry.
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// impl forall [T: SubobjectDestroy] partial T as Destroy {
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// alias Op = T.Op;
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// }
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