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Normalize template specialization angle bracket spacing#55910

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coado:export-D95204780
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Normalize template specialization angle bracket spacing#55910
coado wants to merge 10 commits intofacebook:mainfrom
coado:export-D95204780

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@coado coado commented Mar 4, 2026

Summary:
Normalizes angle bracket spacing in scope names for template specializations.

Doxygen encodes template specializations with spaces around angle brackets in compound names (e.g., CSSDataTypeParser< CSSMatrix >). This caused inconsistent output in API snapshots.

The fix applies normalize_angle_brackets() to qualified paths when parsing scope names, ensuring consistent output:

  • CSSDataTypeParser< CSSMatrix >CSSDataTypeParser<CSSMatrix>
  • Callback< R(Args...)>Callback<R(Args...)>

Added a new test case should_normalize_template_specialization_angle_brackets to verify the fix.

Changelog:
[Internal]

Reviewed By: cipolleschi

Differential Revision: D95204780

@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 Mar 4, 2026
@facebook-github-bot facebook-github-bot added p: Software Mansion Partner: Software Mansion Partner p: Facebook Partner: Facebook labels Mar 4, 2026
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meta-codesync bot commented Mar 4, 2026

@coado has exported this pull request. If you are a Meta employee, you can view the originating Diff in D95204780.

Dawid Małecki added 9 commits March 5, 2026 01:49
Summary:
Doxygen incorrectly parses Objective-C interface declarations with protocol conformance. For example:

```objc
interface RCTAppearance : RCTEventEmitter <RCTBridgeModule>
```

Doxygen splits this into **two separate base classes** in the XML:
```xml
<basecompoundref>RCTEventEmitter</basecompoundref>
<basecompoundref>&lt;RCTBridgeModule&gt;</basecompoundref>
```

This caused the parser to output:
```
interface RCTAppearance : public RCTEventEmitter, public <RCTBridgeModule> {
```

Instead of the expected:
```
interface RCTAppearance : public RCTEventEmitter <RCTBridgeModule> {
```

The fix detects when a "base class" name starts and ends with `<...>` (indicating it's a protocol conformance) and combines it with the preceding actual base class name.

Differential Revision: D94351731
Summary:
Doxygen splits block property types across `<type>` and `<argsstring>` elements. For example:

```objc
property (nonatomic, copy) void (^eventInterceptor)(NSString *eventName, NSDictionary *event, NSNumber *reactTag);
```

Produces XML like:
```xml
<type>void(^</type>
<name>eventInterceptor</name>
<argsstring>)(NSString *eventName, NSDictionary *event, NSNumber *reactTag)</argsstring>
```

This caused the parser to output incomplete types. The fix detects when the property type ends with `(^` and combines it with the property name and argsstring:
```
property (copy) void(^eventInterceptor)(NSString *eventName, NSDictionary *event, NSNumber *reactTag);
```

Differential Revision: D94366205

Reviewed By: cipolleschi
Summary: Set predefined `__deprecated_msg` to empty string in the `.doxygen.config.template` as doxygen has problem with parsing and produces malformed xml.

Differential Revision: D94517576
Summary:
Adds a doxygen input filter (`input_filters/doxygen_strip_comments.py`) that strips block comments from source files before doxygen parses them.

This prevents doxygen from incorrectly parsing Objective-C code examples (like `interface`, `protocol`) within documentation comments as actual code declarations. For example, a doc comment containing:

```
/**
 * Example:
 *   interface RCT_EXTERN_MODULE(MyModule, NSObject)
 *   end
 */
```

Was being parsed by doxygen as an actual interface declaration, resulting in malformed output like `interface RCT_EXTERN_MODULE {}` in the API snapshot.

The filter preserves line numbers by replacing comment content with the equivalent number of newlines, ensuring error messages remain accurate.

Differential Revision: D94534964
Summary:
Adds a doxygen input filter (`input_filters/doxygen_strip_comments.py`) that strips block comments from source files before doxygen parses them.

This prevents doxygen from incorrectly parsing Objective-C code examples (like `interface`, `protocol`) within documentation comments as actual code declarations. For example, a doc comment containing:

```
/**
 * Example:
 *   interface RCT_EXTERN_MODULE(MyModule, NSObject)
 *   end
 */
```

Was being parsed by doxygen as an actual interface declaration, resulting in malformed output like `interface RCT_EXTERN_MODULE {}` in the API snapshot.

## Changes

1. **Input Filter**: Added `doxygen_strip_comments.py` that replaces block comments with equivalent newlines to preserve line numbers.

2. **Fixed Empty Snapshots**: Fixed the `__main__.py` to properly pass the `${DOXYGEN_INPUT_FILTER}` placeholder value to doxygen config, which was causing empty snapshot generation.

3. **Normalized Pointer Spacing**: Added `normalize_pointer_spacing()` function to normalize doxygen's output:
   - `NSString *` → `NSString*`
   - `int &` → `int&`
   - `T &&` → `T&&`

4. **Added Snapshot Test**: Created `should_not_parse_interface_from_doc_comment` test case demonstrating the issue.

Differential Revision: D94538938
Summary:
Fixes inconsistent spacing around pointer (`*`) and reference (`&`, `&&`) symbols in the parser output.

Doxygen outputs types with a space before `*` and `&` (e.g., `NSString *`), which is inconsistent. This diff adds `normalize_pointer_spacing()` to standardize the output:

- `NSString *` → `NSString*`
- `int &` → `int&`
- `T &&` → `T&&`
- For function arguments: `NSString *name` → `NSString* name`

## Changes

1. Added `normalize_pointer_spacing()` function in `text_resolution.py`
2. Applied normalization in `resolve_ref_text_name()` and `resolve_linked_text_name()`
3. Applied normalization to block property argsstrings in `builders.py`
4. Updated all affected snapshot files to use normalized spacing

Differential Revision: D95078214
Summary: Includes definitions behind the `__cplusplus` macro to also be visible in the API snapshot.

Differential Revision: D95189538
Summary:
Doxygen incorrectly merges category members into the base interface XML output.
This causes duplicate members to appear in both the category scope and the interface scope.

The fix detects category members by checking if their definition contains the pattern
`ClassName(CategoryName)::` (e.g., `RCTBridgeProxy(Cxx)::cxxOnlyProperty`) and filters
them out when processing interface sections.

Differential Revision: D95191148
Summary:
Normalizes angle bracket spacing in scope names for template specializations.

Doxygen encodes template specializations with spaces around angle brackets in compound names (e.g., `CSSDataTypeParser< CSSMatrix >`). This caused inconsistent output in API snapshots.

The fix applies `normalize_angle_brackets()` to qualified paths when parsing scope names, ensuring consistent output:
- `CSSDataTypeParser< CSSMatrix >` → `CSSDataTypeParser<CSSMatrix>`
- `Callback< R(Args...)>` → `Callback<R(Args...)>`

Added a new test case `should_normalize_template_specialization_angle_brackets` to verify the fix.

Differential Revision: D95195669
coado added a commit to coado/react-native that referenced this pull request Mar 5, 2026
Summary:
Pull Request resolved: facebook#55910

Normalizes angle bracket spacing in scope names for template specializations.

Doxygen encodes template specializations with spaces around angle brackets in compound names (e.g., `CSSDataTypeParser< CSSMatrix >`). This caused inconsistent output in API snapshots.

The fix applies `normalize_angle_brackets()` to qualified paths when parsing scope names, ensuring consistent output:
- `CSSDataTypeParser< CSSMatrix >` → `CSSDataTypeParser<CSSMatrix>`
- `Callback< R(Args...)>` → `Callback<R(Args...)>`

Added a new test case `should_normalize_template_specialization_angle_brackets` to verify the fix.

Changelog:
[Internal]

Reviewed By: cipolleschi

Differential Revision: D95204780
@coado coado force-pushed the export-D95204780 branch from b5fee39 to c620be7 Compare March 5, 2026 10:21
coado added a commit to coado/react-native that referenced this pull request Mar 5, 2026
Summary:
Pull Request resolved: facebook#55910

Normalizes angle bracket spacing in scope names for template specializations.

Doxygen encodes template specializations with spaces around angle brackets in compound names (e.g., `CSSDataTypeParser< CSSMatrix >`). This caused inconsistent output in API snapshots.

The fix applies `normalize_angle_brackets()` to qualified paths when parsing scope names, ensuring consistent output:
- `CSSDataTypeParser< CSSMatrix >` → `CSSDataTypeParser<CSSMatrix>`
- `Callback< R(Args...)>` → `Callback<R(Args...)>`

Added a new test case `should_normalize_template_specialization_angle_brackets` to verify the fix.

Changelog:
[Internal]

Reviewed By: cipolleschi

Differential Revision: D95204780
@coado coado force-pushed the export-D95204780 branch from c620be7 to 9dfb7e1 Compare March 5, 2026 10:33
Summary:
Pull Request resolved: facebook#55910

Normalizes angle bracket spacing in scope names for template specializations.

Doxygen encodes template specializations with spaces around angle brackets in compound names (e.g., `CSSDataTypeParser< CSSMatrix >`). This caused inconsistent output in API snapshots.

The fix applies `normalize_angle_brackets()` to qualified paths when parsing scope names, ensuring consistent output:
- `CSSDataTypeParser< CSSMatrix >` → `CSSDataTypeParser<CSSMatrix>`
- `Callback< R(Args...)>` → `Callback<R(Args...)>`

Added a new test case `should_normalize_template_specialization_angle_brackets` to verify the fix.

Changelog:
[Internal]

Reviewed By: cipolleschi

Differential Revision: D95204780
@coado coado force-pushed the export-D95204780 branch from 9dfb7e1 to 2612896 Compare March 5, 2026 11:35
@meta-codesync meta-codesync bot closed this in dc8c442 Mar 5, 2026
@facebook-github-bot facebook-github-bot added the Merged This PR has been merged. label Mar 5, 2026
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meta-codesync bot commented Mar 5, 2026

This pull request has been merged in dc8c442.

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