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[Runtime] Support recursive types #58

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Merged
merged 7 commits into from
Oct 19, 2023

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czechboy0
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Motivation

Runtime changes for apple/swift-openapi-generator#70.

Modifications

Introduce a new wrapper type CopyOnWriteBox as a reference type with copy-on-write semantics, to be used by the generated code to hide a ref type inside a struct that needs boxing. (Details on the logic will be in the generator PR description.)

Result

A new type available for the generated code to use for breaking reference cycles.

Test Plan

Added unit tests for the type.

@czechboy0 czechboy0 marked this pull request as ready for review October 18, 2023 15:49
@czechboy0 czechboy0 marked this pull request as draft October 18, 2023 20:52
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Will move to get + _modify tomorrow, so taking the PR back to draft.

@czechboy0 czechboy0 marked this pull request as ready for review October 19, 2023 08:10
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@dnadoba Applied your feedback, can you take another look?

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@dnadoba dnadoba left a comment

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Everything needs to be @inlineable, including the protocol conformances.

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@dnadoba dnadoba left a comment

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Some @inlinable are missing but otherwise it looks good.
Note that the implementations of the Custom[Debug]StringConvertible protocols could be made @inlinable as well but they are usually called through existential anyway so I'm fine without adding them.

@czechboy0 czechboy0 merged commit c48f166 into apple:main Oct 19, 2023
@czechboy0 czechboy0 deleted the hd-recursive-types branch October 19, 2023 10:27
@czechboy0 czechboy0 added the 🔨 semver/patch No public API change. label Oct 19, 2023
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2 participants