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ac2012e5ed
Three flat O(1) indexes + pure build functions over per-file artifacts. Contract-only; no runtime behavior change yet — consumers (#917 Registry lookups, #915 SCC finalize, #919 ScopeExtractor) wire in later. Each index follows the same shape: - build function: flat input list → frozen immutable index - public interface: readonly Map + get/has/size accessors - first-write-wins on id/filePath collisions (upstream bug signal) - pure, side-effect-free, safe to call repeatedly DefIndex — the global "what is this id?" lookup gitnexus-shared/src/scope-resolution/def-index.ts buildDefIndex(defs: readonly SymbolDefinition[]): DefIndex byId: ReadonlyMap<DefId, SymbolDefinition> Consumed by Registry.lookup (#917) to materialize DefId[] hits back to full SymbolDefinition records. ModuleScopeIndex — `filePath → moduleScopeId` for cross-file hops gitnexus-shared/src/scope-resolution/module-scope-index.ts buildModuleScopeIndex(entries): ModuleScopeIndex byFilePath: ReadonlyMap<string, ScopeId> Consumed by the SCC finalize link pass (#915) to resolve ImportEdge.targetFile to a concrete module scope in constant time. QualifiedNameIndex — cross-kind qualified-name fast path gitnexus-shared/src/scope-resolution/qualified-name-index.ts buildQualifiedNameIndex(defs: readonly SymbolDefinition[]): QualifiedNameIndex byQualifiedName: ReadonlyMap<string, readonly DefId[]> Returns DefId[] (not a single DefId) because partial classes, method overloads, and cross-kind collisions can legitimately share a qualifiedName. Callers filter by acceptedKinds at the lookup site. Consumed by Registry.lookup qualified fast path + resolveTypeRef dotted fallback (#916, #917). Barrel re-exports added to gitnexus-shared/src/index.ts so consumers import from 'gitnexus-shared' rather than deep paths. Tests (gitnexus/test/unit/scope-resolution/, 23 total): def-index.test.ts (6): empty, single def, multiple distinct, first-write-wins collision, missing id returns undefined, byId direct iteration module-scope-index.test.ts (6): empty, single entry, multiple files, first-write-wins on duplicate filePath, missing returns undefined, byFilePath direct iteration qualified-name-index.test.ts (11): empty, single qnamed def, partial classes accumulate, input-order preservation, qname separation, skip undefined/empty qname, pair dedup, cross-kind indexing, frozen-empty-array on miss, direct iteration Verification: - gitnexus-shared + gitnexus build clean (tsc + scripts/build.js) - test/unit/scope-resolution: 23/23 pass - model + shadow + scope-resolution combined: 129/129 pass - No runtime consumer wiring yet — indexes are standalone library functions that #915, #917, #919 will import when ready Depends on #910 (SymbolDefinition, DefId, ScopeId types — already on main). Unblocks #915 (finalize algorithm), #917 (Registry.lookup), #919 (ScopeExtractor materialization). |
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