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Classify cxxreact/JSBundleType.h as for-frameworks (#58956) - #58956

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@coado coado commented Oct 8, 2026 •

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Summary:

JSBundleType.h exposes bundle-format detection internals (BundleHeader, ScriptTag, parseTypeFromHeader, isHermesBytecodeBundle). Within React Native it is only used by the bundle loaders, but out-of-tree platforms read BundleHeader directly, so it is classified as "for frameworks" rather than private.

Remove JSBundleType.h from the <React/JSBigString.h> umbrella: a public umbrella that includes it would keep its symbols public regardless of its guard. Frameworks include <cxxreact/JSBundleType.h> directly.

The C++ API snapshots are regenerated: these symbols are removed from the Debug, Release and Newarch snapshots and stay in the Frameworks snapshots.

Changelog: [Internal]

Reviewed By: cipolleschi

Differential Revision: D124104985

@meta-cla meta-cla Bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Oct 8, 2026
@facebook-github-tools facebook-github-tools Bot added p: Software Mansion Partner: Software Mansion Partner p: Facebook Partner: Facebook labels Oct 8, 2026
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meta-codesync Bot commented Oct 8, 2026

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@coado has exported this pull request. If you are a Meta employee, you can view the originating Diff in D124104985.

coado added a commit to coado/react-native that referenced this pull request Oct 8, 2026
Summary:
Pull Request resolved: react#58956

`JSBundleType.h` exposes bundle-format detection internals (`BundleHeader`, `ScriptTag`, `parseTypeFromHeader`, `isHermesBytecodeBundle`). Within React Native it is only used by the bundle loaders, but out-of-tree platforms read `BundleHeader` directly, so it is classified as "for frameworks" rather than private.

Remove `JSBundleType.h` from the `<React/JSBigString.h>` umbrella: a public umbrella that includes it would keep its symbols public regardless of its guard. Frameworks include `<cxxreact/JSBundleType.h>` directly.

The C++ API snapshots are regenerated: these symbols are removed from the Debug, Release and Newarch snapshots and stay in the Frameworks snapshots.

Changelog: [Internal]

Differential Revision: D124104985
@coado
coado force-pushed the export-D124104985 branch from 666a14f to c32e40f Compare October 8, 2026 15:08
@meta-codesync meta-codesync Bot changed the title Classify cxxreact/JSBundleType.h as for-frameworks Classify cxxreact/JSBundleType.h as for-frameworks (#58956) Oct 8, 2026
coado added a commit to coado/react-native that referenced this pull request Oct 8, 2026
Summary:
Pull Request resolved: react#58956

`JSBundleType.h` exposes bundle-format detection internals (`BundleHeader`, `ScriptTag`, `parseTypeFromHeader`, `isHermesBytecodeBundle`). Within React Native it is only used by the bundle loaders, but out-of-tree platforms read `BundleHeader` directly, so it is classified as "for frameworks" rather than private.

Remove `JSBundleType.h` from the `<React/JSBigString.h>` umbrella: a public umbrella that includes it would keep its symbols public regardless of its guard. Frameworks include `<cxxreact/JSBundleType.h>` directly.

The C++ API snapshots are regenerated: these symbols are removed from the Debug, Release and Newarch snapshots and stay in the Frameworks snapshots.

Changelog: [Internal]

Differential Revision: D124104985
@coado
coado force-pushed the export-D124104985 branch from c32e40f to 1ca963e Compare October 8, 2026 15:24
coado added a commit to coado/react-native that referenced this pull request Oct 9, 2026
Summary:
Pull Request resolved: react#58956

`JSBundleType.h` exposes bundle-format detection internals (`BundleHeader`, `ScriptTag`, `parseTypeFromHeader`, `isHermesBytecodeBundle`). Within React Native it is only used by the bundle loaders, but out-of-tree platforms read `BundleHeader` directly, so it is classified as "for frameworks" rather than private.

Remove `JSBundleType.h` from the `<React/JSBigString.h>` umbrella: a public umbrella that includes it would keep its symbols public regardless of its guard. Frameworks include `<cxxreact/JSBundleType.h>` directly.

The C++ API snapshots are regenerated: these symbols are removed from the Debug, Release and Newarch snapshots and stay in the Frameworks snapshots.

Changelog: [Internal]

Reviewed By: cipolleschi

Differential Revision: D124104985
@coado
coado force-pushed the export-D124104985 branch from 1ca963e to 9824a9a Compare October 9, 2026 09:40
Dawid Małecki and others added 3 commits October 12, 2026 06:05
Summary:
Move `LayoutConformanceComponentDescriptor.h`, `LayoutConformanceProps.h` and `LayoutConformanceShadowNode.h` from the public tier of the C++ stable API to the for-frameworks tier, and remove them from the `<React/View.h>` umbrella.

These headers implement the experimental `LayoutConformance` core component. Native component authors do not use them, but a platform that registers React Native's core components does: `YogaLayoutableShadowNode::resolveErrata` checks for `LayoutConformanceShadowNode` with a `dynamic_cast` to choose the Yoga errata, so a platform has to register React Native's own descriptor for the component to have any effect. That makes them framework-author API rather than private headers. The `LayoutConformance` enum and its conversions stay public in `primitives.h` and `conversions.h`.

A for-frameworks header has to reach public headers through their umbrella, so the three headers now include `<React/View.h>` and `<React/RendererCore.h>` instead of fine-grained paths, and compile when included directly under strict API enforcement. `LayoutConformanceProps.h` was the only umbrella member that included the public `conversions.h`, so `conversions.h` is added to `<React/View.h>` directly to keep it available through the umbrella.

The headers stay published, because React Native's own core component registries outside this module include them. Because they now include their own module's umbrella, and `YogaLayoutableShadowNode.cpp` includes `LayoutConformanceShadowNode.h`, the CMake `rrc_view` target exposes its umbrella directory as `PUBLIC` instead of `INTERFACE`, so the module's own sources can resolve `<React/View.h>` as well as its dependents.

Changelog: [Internal]

Differential Revision: D123895702
Summary:
Move the following `react/nativemodule/core` headers from the public tier to the for-frameworks tier:

- `TurboModuleBinding.h` - not called by native module authors,
- `JavaInteropTurboModule.h` (Android) and `RCTInteropTurboModule.h` (iOS) - legacy

The C++ API snapshots are regenerated: these symbols are removed from the Debug, Release and Newarch snapshots and stay in the Frameworks snapshots.

Changelog: [Internal]

Differential Revision: D124104733
Summary:
Pull Request resolved: react#58956

`JSBundleType.h` exposes bundle-format detection internals (`BundleHeader`, `ScriptTag`, `parseTypeFromHeader`, `isHermesBytecodeBundle`). Within React Native it is only used by the bundle loaders, but out-of-tree platforms read `BundleHeader` directly, so it is classified as "for frameworks" rather than private.

Remove `JSBundleType.h` from the `<React/JSBigString.h>` umbrella: a public umbrella that includes it would keep its symbols public regardless of its guard. Frameworks include `<cxxreact/JSBundleType.h>` directly.

The C++ API snapshots are regenerated: these symbols are removed from the Debug, Release and Newarch snapshots and stay in the Frameworks snapshots.

Changelog: [Internal]

Reviewed By: cipolleschi

Differential Revision: D124104985
@coado
coado force-pushed the export-D124104985 branch from 9824a9a to 66e43fc Compare October 12, 2026 13:39
@meta-codesync meta-codesync Bot closed this in a4a9be9 Oct 12, 2026
@meta-codesync meta-codesync Bot added the Merged This PR has been merged. label Oct 12, 2026
@meta-codesync

meta-codesync Bot commented Oct 12, 2026

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This pull request has been merged in a4a9be9.

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