* feat(extractors): strip Unreal Engine reflection macros before C++ parsing
Tree-sitter does not expand C preprocessor macros, so Unreal Engine reflection markers (UCLASS, UFUNCTION, UPROPERTY, MODULENAME_API, GENERATED_BODY, ...) are parsed verbatim. The result is mis-parsed UE class/function declarations: in 'class BRAWLUI_API UMyClass : public UObject', tree-sitter-cpp captures BRAWLUI_API as the class name, leaving the actual class without an entry in the graph.
This patch adds an optional 'preprocessSource' hook to LanguageProvider and implements it for C++ via a new 'stripUeMacros' module. The transform is length-preserving (each elided byte becomes a space, newlines preserved) so byte offsets and line/column positions tree-sitter reports remain identical to the original file -- symbol locations in the graph stay accurate.
A cheap detection guard short-circuits files that don't look like UE sources, so non-UE C++ codebases pay no cost (single regex test then bail).
27 unit tests cover the detection guard, length preservation across multiple UE samples, macro removal for UCLASS/UFUNCTION/UPROPERTY/USTRUCT/GENERATED_BODY/MODULE_API/DECLARE_*_DELEGATE/UE_DEPRECATED, false-positive guards (substring matches, balanced parens inside string literals, Qt macros left alone), and class-name extraction sanity. Full unit suite still passes (5337 tests, 0 regressions). Verified end-to-end against an Unreal Engine 5.7 game project (Brawl).
* fix(extractors): address PR review findings on UE macro preprocessor
Resolves three blocking issues raised by automated review:
1. Prettier format: ran prettier --write on call-processor.ts, heritage-processor.ts, import-processor.ts (the three sites where the cache-miss reparse hook insertion landed unformatted).
2. Byte-length contract narrowed: language-provider.ts docblock now states the contract precisely (UTF-16 .length + newline-position preservation, not UTF-8 byte length). Notes that startIndex byte offsets only match the original file when the elided range is pure ASCII -- which is the practical UE case (reflection macros and module-export tokens are ASCII-only).
3. Tree-sitter extraction tests added: new end-to-end tests parse the preprocessed source with tree-sitter-cpp and assert the captured class/struct name is the real UClass identifier (UMyClass, FMyData), never the MODULE_API export macro. Also asserts source positions (startPosition.row) survive the transform.
Plus one moderate fix:
4. _API stripping is now scoped to UE files only. The HAS_UE_HINT guard previously included [A-Z]_API tokens, which would fire on non-UE codebases that use REST_API / HTTP_API / MY_LIB_API as constants or enum values, silently erasing them. The guard now requires a strong UE marker (UCLASS|UFUNCTION|UPROPERTY|USTRUCT|UENUM|UINTERFACE|GENERATED_BODY|UE_DEPRECATED|DECLARE_*_DELEGATE) to be present before any stripping runs. Two new tests confirm REST_API and DECLARE_HANDLER style identifiers in non-UE files are left untouched.
Plus one minor fix:
5. stripUeMacros signature now accepts (source, _filePath?) to match the LanguageProvider.preprocessSource hook contract exactly. The filePath argument is unused; UE detection is purely content-based.
Verification: 34/34 preprocessor tests pass (was 27, +7 new for non-ASCII preservation, REST_API safety, tree-sitter extraction, struct extraction, source position preservation). Full unit suite 5349 pass, 0 regressions. Typecheck clean. Prettier --check clean on all 9 changed files.
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Co-authored-by: Gergő Magyar <gergomagyar@icloud.com>
