feat: add Objective-C language support by 0x1306a94 · Pull Request #165 · colbymchenry/codegraph

0x1306a94 · 2026-05-18T06:27:40Z

Summary

Adds partial Objective-C support to the tree-sitter extraction pipeline so iOS/macOS codebases can be indexed with the same graph queries as other languages.

Wiring

Register objc in LANGUAGES, WASM_GRAMMAR_FILES (tree-sitter-objc.wasm from tree-sitter-wasms, ABI 14), and EXTRACTORS
Map .m / .mm → objc; classify .h as Objective-C when content matches @interface / @implementation / @protocol / @synthesize (after the existing C++ .h heuristic)
File discovery uses zero-config isSourceFile + .gitignore — no separate include globs needed

Extraction (`objc.ts`)

Classes — @interface emits one class node; @implementation reuses it via visitNode (avoids duplicate class/method nodes)
Protocols — @protocol → protocol nodes
Methods — method_definition only; full multi-part selectors (doThing:with:) via resolveName
Properties — @property via extractPropertyName (walks struct_declarator / pointer_declarator)
Functions & imports — C-style function_definition and #import (preproc_include)
Inheritance — extends for superclass; implements for angle-bracket protocols on @interface
Calls — call_expression and [receiver message] (message_expression) call edges

Core hooks

resolveName / extractPropertyName on LanguageExtractor (used by ObjC; generic fallbacks unchanged)
extractInheritance early-return branch for class_interface
Import resolver try-order: .h, .m, .mm

Docs & eval corpus

README: Partial support row (not full — documents .mm ObjC++ limits)
CHANGELOG [Unreleased] entry with known limitations
Agent-eval corpus: Masonry (small), FMDB (medium), SDWebImage (large)

Benchmark (local dev build)

Repo	Files	Nodes	verify-extraction	Notes
Masonry	267	1,418	PASS	A/B: 6 tool calls / 1 Read vs 18 / 15 Reads
FMDB	~80	—	PASS
SDWebImage	274	3,710	PASS

Known limitations

Chained/nested message sends (e.g. [[Class alloc] init]) only record the innermost method name
No instantiates edge for [Class alloc] patterns
@protocol Foo <Bar> refinement lists not yet wired to implements edges
Heavy C++ in .mm files may parse incompletely under the ObjC grammar

Test plan

npm run build
npx vitest run __tests__/extraction.test.ts -t "Objective-C" (7 tests)
node scripts/add-lang/verify-extraction.mjs on sample + Masonry / FMDB / SDWebImage

Wire tree-sitter-objc for .m/.mm/ObjC headers: classes, protocols, methods, @Property, #import edges, inheritance, and message-send calls.

) Covers #165: tree-sitter-objc extractor for .m / .mm / content-sniffed .h, with full multi-part selectors, @protocol nodes, @Property, message expression call edges, extends/implements edges. Validated on AFNetworking / RestKit / Texture. Disclosed limitations match the README's 'Partial support' note (categories produce duplicate class nodes per category file; .mm ObjC++ parses incompletely under the ObjC grammar; mixed Swift/ObjC bridging out of scope, tracked separately). Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

…thod definition #165 extracted multi-part ObjC selectors correctly on the *definition* side (`GET:parameters:headers:progress:success:failure:` as a method node name) but the call-site handler in tree-sitter.ts only built the first selector keyword, so calls never resolved to those definitions. Verified on AFNetworking: 0 → 84 call edges targeting multi-keyword methods after the fix. The grammar emits one `method` field child per keyword on message_expression nodes; collecting them all and joining with `:` reconstructs the full selector (matching what extractObjcMethodName does on the definition side). Regression test in extraction.test.ts covers `[d setObject:@"v" forKey:@"k"]` → `d.setObject:forKey:`, the 3-keyword form, and the self/super-skip case (`touchesBegan:withEvent:`). This is a prerequisite for Swift↔ObjC bridging (the bridge rides the same call-edge path), but stands on its own as a #165 followup. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

@objc

…ging (#430) Implements the design from `docs/design/mixed-ios-and-react-native-bridging.md`. Closes the cross-language flow gap so `trace` / `callers` / `callees` / `impact` connect end-to-end across language boundaries in real iOS, React Native, and Expo codebases. ## Bridges shipped | Boundary | Mechanism | Real-codebase validation | |---|---|---| | **Swift ↔ Objective-C** | Resolver applying Apple's @objc auto-bridging name math + Cocoa preposition prefixes | Charts (S, 269) · realm-swift (M, 369) · wikipedia-ios (L, 1734) | | **React Native legacy bridge** | Resolver parsing `RCT_EXPORT_MODULE` / `RCT_EXPORT_METHOD` / `RCT_REMAP_METHOD` (ObjC) + `@ReactMethod` (Java/Kotlin) | AsyncStorage (S, ~60) · react-native-svg (M, ~700) · react-native-firebase (L, ~1100) | | **React Native TurboModules** | Resolver treating `Native<X>.ts` spec interface as ground truth | via RNSvg + RNFirebase subsets | | **Native → JS events** | Synthesizer matching native `sendEventWithName:`/`emit(...)` to JS `addListener('e', handler)` keyed by literal event name; falls back to enclosing constant/variable for wrapper-API parameter handlers | RNGeolocation (S) · RNFirebase (L) | | **Expo Modules** | Framework extract synthesizes `method` nodes from Swift/Kotlin `Module { Name("X"); Function("y") { ... } }` DSL | expo-haptics (S, 14) · expo-camera (M, 72) · ExpoSweep (L, 332, 7 packages) | | **Fabric + legacy Paper view components** | Extract `component` + `property` nodes from Codegen `codegenNativeComponent<Props>('Name', ...)` specs AND legacy `RCT_EXPORT_VIEW_PROPERTY` / `@ReactProp` macros, then synthesize component → native class by name+suffix convention | react-native-segmented-control (S, legacy) · react-native-screens (M, Codegen) · react-native-skia (L, hybrid monorepo) | ## Bug fixes surfaced along the way - `tree-sitter.ts` message_expression — multi-keyword ObjC call sites now reconstruct `a:b:` selectors so they resolve to multi-part method definitions (gap discovered post-#165; 0 → 84 call edges to `GET:parameters:...` style methods on AFNetworking). - `src/index.ts` resolver lifecycle — `indexAll()` now re-initializes the resolver after extraction so framework `detect()` sees the populated index. Pre-existing latent bug that affected UIKit and SwiftUI resolvers too. - `src/extraction/index.ts` `buildDetectionContext` — added `listDirectories` so framework detect() can probe monorepo subpackages uniformly (fix needed for react-native-skia detection). ## Regression check on 5 control repos | Repo | Result | |---|---| | Express (small JS) | ✅ unchanged — 266 routes, express framework detected | | Excalidraw (medium TS/React) | ✅ 9284 nodes (CLAUDE.md baseline ~9290); canonical `trace(mutateElement, renderStaticScene)` returns the flow | | Django realworld (Python) | ✅ django framework detected, 16 routes | | Spring petclinic (Java) | ✅ spring framework detected, 17 routes | | Texture (pure ObjC, large) | ✅ exactly matches #165 baseline: 4702 methods, 894 classes, 808/808 file coverage, 913 multi-keyword selectors, 55 protocols, 1036 properties | ## Tests 928 passing (+87 net new bridge tests across the 5 channels); 2 pre-existing skips. The mcp-staleness-banner / watcher parallel flakiness is unchanged by this work (different test fails each run, all pass in isolation; pre-existing on main). ## Documentation - README: new 'Mixed iOS / React Native / Expo bridging' section with the per-boundary table and validation-corpus links. - CHANGELOG `[Unreleased]`: full entry per bridge with measurements. - `docs/design/mixed-ios-and-react-native-bridging.md`: the design doc (§8 measurements filled in across §8a-§8g). - `docs/design/dynamic-dispatch-coverage-playbook.md` §6 coverage matrix: six new rows. - `.claude/skills/agent-eval/corpus.json`: four new sections covering 15 real GitHub repos for the eval harness. 🤖 Generated with [Claude Code](https://claude.com/claude-code)

…435) The 0.9.5 release tag included all of: - Shared MCP daemon (#411) - Per-file staleness banner (#403) - Worktree-borrow detection (#312) - Watcher inotify-budget fix (#276) - Objective-C indexing (#165) - Mixed iOS / React Native / Expo cross-language bridging (#430) But the [0.9.5] block in CHANGELOG.md only had two Fixed entries (the fs-based change detection and default-ignore set), because the major feature entries were still sitting under [Unreleased] when 0.9.5 was tagged. release.yml extracts release notes from the matching version block, so the published v0.9.5 release notes are missing the bulk of what shipped. Move all the [Unreleased] entries that pre-date 0.9.5's tag (commit 318cda1) into [0.9.5], and reset [Unreleased] to empty. The GitHub Release notes for v0.9.5 get updated separately via gh release edit. Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

…, watcher fixes Key upstream changes merged: - feat(extraction): Objective-C language support (colbymchenry#165) - feat(mcp): share one serve --mcp per project across MCP clients (colbymchenry#411) - feat(mcp): per-file staleness banner + tunable watcher debounce (colbymchenry#403) - feat(mcp): detect borrowed git worktree index (colbymchenry#312) - feat(index): default-ignore dependency/build/cache dirs (colbymchenry#407) - feat(resolution): mixed iOS / React Native / Expo bridging (colbymchenry#430) - fix(watcher): exclude ignored dirs before watching (colbymchenry#276) - fix(sync): filesystem-based change detection (colbymchenry#414) Conflicts resolved: CLAUDE.md, .cursor/rules, extraction tests (kept split), MCP files (tools/server-instructions/transport/engine), package.json (kept jieba) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

0x1306a94 force-pushed the feat/objc-language-support branch 2 times, most recently from 74ca84e to ed563b2 Compare May 22, 2026 02:44

0x1306a94 changed the title ~~feat(objc): add Objective-C extraction for .m, .mm, and ObjC .h~~ feat(extraction): add Objective-C indexing for .m, .mm, and ObjC headers May 22, 2026

0x1306a94 changed the title ~~feat(extraction): add Objective-C indexing for .m, .mm, and ObjC headers~~ feat: add Objective-C language support May 22, 2026

0x1306a94 force-pushed the feat/objc-language-support branch 4 times, most recently from a80d5b0 to f26998e Compare May 24, 2026 23:57

feat: add Objective-C language support

af197eb

Wire tree-sitter-objc for .m/.mm/ObjC headers: classes, protocols, methods, @Property, #import edges, inheritance, and message-send calls.

colbymchenry mentioned this pull request May 26, 2026

feat: add Objective-C language support #424

Closed

colbymchenry force-pushed the feat/objc-language-support branch from f26998e to af197eb Compare May 26, 2026 05:31

colbymchenry merged commit 61153f9 into colbymchenry:main May 26, 2026

colbymchenry mentioned this pull request May 26, 2026

docs(changelog): add Objective-C indexing entry (#165) #429

Merged

colbymchenry mentioned this pull request May 26, 2026

design: Swift+ObjC and React Native cross-language bridging #430

Merged

colbymchenry mentioned this pull request May 26, 2026

Does CodeGraph support Objective-C and mixed Swift/Objective-C projects? #401

Closed

0x1306a94 deleted the feat/objc-language-support branch May 26, 2026 07:19

colbymchenry mentioned this pull request May 26, 2026

docs(changelog): move 0.9.5 features from [Unreleased] into [0.9.5] #435

Merged

colbymchenry mentioned this pull request May 26, 2026

Feature Request: Full support for Objective-C/C++ (.m/.mm) symbol extraction #390

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feat: add Objective-C language support#165

feat: add Objective-C language support#165
colbymchenry merged 1 commit into
colbymchenry:mainfrom
0x1306a94:feat/objc-language-support

0x1306a94 commented May 18, 2026 •

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0x1306a94 commented May 18, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Summary

Wiring

Extraction (objc.ts)

Core hooks

Docs & eval corpus

Benchmark (local dev build)

Known limitations

Test plan

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0x1306a94 commented May 18, 2026 •

edited

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Extraction (`objc.ts`)