github/codegraph
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

feat: Add content-based C++ detection for .h headers

Browse Source 
Addresses C++ classes missing from .h files where extension-based detection defaults to 'c' language which has no class extraction support. Adds looksLikeCpp() heuristic that scans first 8KB for C++-specific patterns (namespace, class, template, access specifiers) to promote .h files to 'cpp' language when C++ constructs are detected. Ensures cpp grammar is loaded alongside c to handle potential .h promotion during parsing.
This commit is contained in:
Colby McHenry
2026-04-06 23:38:13 -05:00
parent 237fb3b206
commit 4a8d2f0396
5 changed files with 36 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/SEARCH_QUALITY_LOOP.md
+2 -1
View File
@@ -446,6 +446,7 @@ test().catch(console.error);
| `qualified_name` missing class for nested methods | Extraction not walking parent stack correctly | `src/extraction/tree-sitter.ts: visitNode()` |
| Import edges missing | `extractImport` returns null for this syntax | `src/extraction/languages/<lang>.ts: extractImport` |
| C++ classes/structs/enums missing from macro namespaces | Macros like `NLOHMANN_JSON_NAMESPACE_BEGIN` cause tree-sitter to misparse namespace blocks as `function_definition` | `src/extraction/languages/c-cpp.ts: isMisparsedFunction` filters bad names; `src/extraction/tree-sitter.ts: visitFunctionBody` extracts structural nodes |
| C++ classes missing from `.h` headers | `.h` files default to `c` language which has `classTypes: []` | `src/extraction/grammars.ts: looksLikeCpp()` — content-based heuristic promotes `.h` files to `cpp` when C++ patterns detected |
## After Fixing Issues
@@ -526,7 +527,7 @@ if (receiverType) {
- [x] **Python** — NOT needed. Methods nested in class body. Verified against Flask
- [x] **Rust** — `getReceiverType` walks up to parent `impl_item` to extract type name. Also adds `contains` edges from struct to impl methods. Verified against Deno
- [x] **C** — NOT needed. No methods in C. Strong function/struct/enum extraction with excellent call edge density. Verified against Redis
- [x] **C++** — NOT needed for header-only libs. `isMisparsedFunction` hook filters macro-caused misparse artifacts (e.g. `NLOHMANN_JSON_NAMESPACE_BEGIN`). `visitFunctionBody` now extracts structural nodes (classes/structs/enums) inside macro-confused "function" bodies. Verified against nlohmann/json. Note: out-of-class `Type::method()` definitions would need `getReceiverType` but are uncommon in header-only codebases.
- [x] **C++** — NOT needed for header-only libs. `isMisparsedFunction` hook filters macro-caused misparse artifacts (e.g. `NLOHMANN_JSON_NAMESPACE_BEGIN`). `visitFunctionBody` now extracts structural nodes (classes/structs/enums) inside macro-confused "function" bodies. Content-based `.h` detection (`looksLikeCpp` in `grammars.ts`) promotes C++ headers to `cpp` language so classes in `.h` files are extracted. Verified against nlohmann/json and gRPC. Note: out-of-class `Type::method()` definitions would need `getReceiverType` but are uncommon in header-only codebases.
### Needs Verification