Files
codegraph/src/extraction/tree-sitter.ts
T
Colby MchenryandClaude Opus 4.8 ccced9e358 fix(go): resolve chained factory-function calls New().Method() (#750) (#760)
* fix(go): resolve chained factory-function calls New().Method() (#750)

A Go call through a chained factory function — `New().Method()`,
`With(cfg).Build()` — dropped the receiver to a bare method name, which then
attached to a same-named method on an unrelated type (a wrong edge) or didn't
resolve. Ports the #645/#608 mechanism for Go's bare-factory receivers:

- Part 1: capture Go return types; a pointer `*Foo` -> `Foo`, a multi-return
  `(*Foo, error)` -> its first result, qualified `pkg.Foo` -> `Foo`.
- Part 2: encode a bare-factory chain (`New().Method`), gated to an `identifier`
  receiver so instance chains (`obj.Method().Other()`) keep bare-name.
- Part 3: matchDottedCallChain bare-inner Go branch looks up the FUNCTION's
  return type, then resolves+validates the method on it. Wired into the
  conformance pass so a method promoted from an embedded struct (`type Widget
  struct{ Base }` -> the existing `extends` edge) resolves. FALLBACK: when the
  inner isn't a resolvable function (a package-level VARIABLE holding a function
  value, e.g. gin's `engine()`), fall back to bare-name so the edge isn't dropped.

Validated: synthetic decoy + args + multi-return + embedded-conformance + absent
safety tests (4/4); full suite green. Real-repo A/B on gin (99 .go): pre-fallback
-40 = 25 wrong self-loops removed (good) + 15 correct `Engine::ServeHTTP` dropped
(gin's ginS variable-factory `engine()`); the fallback recovers the 15. gin A/B
re-confirm with the fallback is PENDING (local index flakiness, not a code issue).
EXTRACTION_VERSION 11 -> 12.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* fix(go): stop the chained-call fallback from looping the batched resolver

The Go variable-inner fallback (for chains like `engine().ServeHTTP()` whose
inner is a package-level var, not a factory function) resolved the method via
a synthetic bare-name ref and propagated THAT ref as `.original`. Its
`referenceName` was the bare `ServeHTTP`, not the stored `engine().ServeHTTP`,
so `resolveAndPersistBatched`'s keyed `deleteSpecificResolvedReferences` no-oped,
the offset-0 batch never drained, and the loop re-resolved + re-inserted the
same rows forever — a runaway that grew a 99-file repo (gin) to 5,050,206 edges
/ 1.4 GB before filling the disk.

- name-matcher.ts: tie the bare-name match back to the original `ref` so the
  batch-cleanup delete matches the stored row and the loop drains.
- index.ts: add a non-progress guard to resolveAndPersistBatched — if the
  unresolved_refs table doesn't shrink after a batch, stop instead of growing
  the graph without bound (defense-in-depth for any future keyed-delete mismatch).
- resolution.test.ts: regression test for the variable-inner chain — asserts the
  fallback edge resolves AND the edge count stays bounded (no explosion).

gin A/B (post-fix): db 5.8 MB / 3,699 calls edges; net-zero unique-edge diff vs
main (the fallback recovers the dropped edges, adds no wrong ones). Full suite green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-09 11:31:24 -04:00

4421 lines
184 KiB
TypeScript

/**
* Tree-sitter Parser Wrapper
*
* Handles parsing source code and extracting structural information.
*/
import { Node as SyntaxNode, Tree } from 'web-tree-sitter';
import * as path from 'path';
import {
Language,
Node,
Edge,
NodeKind,
ExtractionResult,
ExtractionError,
UnresolvedReference,
} from '../types';
import { getParser, detectLanguage, isLanguageSupported, isFileLevelOnlyLanguage } from './grammars';
import { generateNodeId, getNodeText, getChildByField, getPrecedingDocstring } from './tree-sitter-helpers';
import type { LanguageExtractor, ExtractorContext } from './tree-sitter-types';
import { EXTRACTORS } from './languages';
import { LiquidExtractor } from './liquid-extractor';
import { RazorExtractor } from './razor-extractor';
import { SvelteExtractor } from './svelte-extractor';
import { DfmExtractor } from './dfm-extractor';
import { VueExtractor } from './vue-extractor';
import { MyBatisExtractor } from './mybatis-extractor';
import {
getAllFrameworkResolvers,
getApplicableFrameworks,
} from '../resolution/frameworks';
// Re-export for backward compatibility
export { generateNodeId } from './tree-sitter-helpers';
/**
* Extract the name from a node based on language
*/
function extractName(node: SyntaxNode, source: string, extractor: LanguageExtractor): string {
const hookName = extractor.resolveName?.(node, source);
if (hookName) return hookName;
// Try field name first
const nameNode = getChildByField(node, extractor.nameField);
if (nameNode) {
// Unwrap pointer_declarator(s) for C/C++ pointer return types
let resolved = nameNode;
while (resolved.type === 'pointer_declarator') {
const inner = getChildByField(resolved, 'declarator') || resolved.namedChild(0);
if (!inner) break;
resolved = inner;
}
// Handle complex declarators (C/C++)
if (resolved.type === 'function_declarator' || resolved.type === 'declarator') {
const innerName = getChildByField(resolved, 'declarator') || resolved.namedChild(0);
return innerName ? getNodeText(innerName, source) : getNodeText(resolved, source);
}
// Lua: `function t.f()` / `function t:m()` — the name node is a dot/method
// index expression; the simple name is the trailing field/method (the table
// receiver is captured separately via getReceiverType).
if (resolved.type === 'dot_index_expression') {
const field = getChildByField(resolved, 'field');
if (field) return getNodeText(field, source);
}
if (resolved.type === 'method_index_expression') {
const method = getChildByField(resolved, 'method');
if (method) return getNodeText(method, source);
}
return getNodeText(resolved, source);
}
// For Dart method_signature, look inside inner signature types
if (node.type === 'method_signature') {
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child && (
child.type === 'function_signature' ||
child.type === 'getter_signature' ||
child.type === 'setter_signature' ||
child.type === 'constructor_signature' ||
child.type === 'factory_constructor_signature'
)) {
// Find identifier inside the inner signature
for (let j = 0; j < child.namedChildCount; j++) {
const inner = child.namedChild(j);
if (inner?.type === 'identifier') {
return getNodeText(inner, source);
}
}
}
}
}
// Arrow/function expressions get their name from the parent variable_declarator,
// not from identifiers in their body. Without this, single-expression arrow
// functions like `const fn = () => someIdentifier` get named "someIdentifier"
// instead of "fn", because the fallback below finds the body identifier.
if (node.type === 'arrow_function' || node.type === 'function_expression') {
return '<anonymous>';
}
// Fall back to first identifier child
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (
child &&
(child.type === 'identifier' ||
child.type === 'type_identifier' ||
child.type === 'simple_identifier' ||
child.type === 'constant')
) {
return getNodeText(child, source);
}
}
return '<anonymous>';
}
/**
* Resolve a Scala type node to its base type NAME for name-matching — unwrapping
* `generic_type` (`Monoid[Int]` → `Monoid`), taking the last segment of a
* qualified `stable_type_identifier` (`cats.Functor` → `Functor`), and falling
* back to a descendant `type_identifier`. Returns null for non-type nodes.
* Shared by Scala inheritance and type-reference extraction.
*/
function scalaBaseTypeName(node: SyntaxNode | null, source: string): string | null {
if (!node) return null;
switch (node.type) {
case 'type_identifier':
case 'identifier':
return getNodeText(node, source);
case 'generic_type':
// `<base> type_arguments` — the base type is the first named child.
return scalaBaseTypeName(node.namedChild(0), source);
case 'stable_type_identifier':
case 'stable_identifier': {
// Qualified `a.b.C` — match on the simple (last) segment.
const ids = node.namedChildren.filter(
(c: SyntaxNode) => c.type === 'type_identifier' || c.type === 'identifier'
);
const last = ids[ids.length - 1];
return last ? getNodeText(last, source) : null;
}
default: {
const id = node.namedChildren.find((c: SyntaxNode) => c.type === 'type_identifier');
return id ? getNodeText(id, source) : null;
}
}
}
/**
* PHP type-position wrapper node kinds (a type-hint is `named_type`,
* `?Foo` is `optional_type`, `A|B` is `union_type`, `A&B` is
* `intersection_type`). Used to find the type subtree inside a parameter /
* property / return position before walking it for class references.
*/
const PHP_TYPE_NODES: ReadonlySet<string> = new Set([
'named_type', 'optional_type', 'nullable_type',
'union_type', 'intersection_type', 'disjunctive_normal_form_type',
'primitive_type',
]);
/**
* Member-access node kinds whose receiver, when it's a capitalized
* type/enum/class name, is a real dependency — `Enum.value`, `Type.CONST`,
* `Foo::BAR`. These VALUE reads (as opposed to `Type.method()` calls, already
* handled) produced no edge, so a type used only via a static member or enum
* value looked like nothing depended on it. See {@link extractStaticMemberRef}.
*/
const MEMBER_ACCESS_TYPES: ReadonlySet<string> = new Set([
'field_access', // java (`Foo.BAR`)
'member_access_expression', // c# (`Foo.Bar`)
'navigation_expression', // kotlin / swift (`Foo.bar`)
'field_expression', // scala (`Foo.bar`)
'class_constant_access_expression', // php (`Foo::CONST`, `Foo::class`)
'scoped_property_access_expression', // php (`Foo::$bar`)
'qualified_identifier', // c++ (`Foo::bar`)
]);
/**
* Languages whose types are Capitalized by convention, so a capitalized
* member-access receiver is reliably a type (not a local/variable). The
* static-member/value-read pass is gated to these — the ones where it was the
* confirmed residual frontier (enum-value / static-field reads). TS/JS/Python
* are deliberately excluded, and a measured A/B confirms the call: extending the
* pass to them adds ZERO coverage — in import-based languages you must `import` a
* type before any `Type.MEMBER` read, so the import edge already covers it (the
* static read is pure duplication) — while adding real graph noise (+1813 edges /
* +2448 `references` on excalidraw, the retrieval-perf benchmark, all pointing at
* already-covered types). Don't re-add `member_expression`/`attribute` here.
*/
const STATIC_MEMBER_LANGS: ReadonlySet<string> = new Set([
'java', 'csharp', 'kotlin', 'swift', 'scala', 'dart', 'php', 'cpp',
]);
/**
* Tree-sitter node kinds that represent constructor invocations
* (`new Foo()` and friends). Used by extractInstantiation to emit
* an `instantiates` reference targeting the class name.
*/
const INSTANTIATION_KINDS: ReadonlySet<string> = new Set([
'new_expression', // typescript / javascript / tsx / jsx
'object_creation_expression', // java / c#
'instance_creation_expression', // some grammars
'composite_literal', // go — `Widget{...}` / `pkga.Widget{...}`
'struct_expression', // rust — `Widget { n: 1 }` / `m::Widget { .. }`
'instance_expression', // scala — `new Monoid[Int] { ... }`
]);
/**
* TreeSitterExtractor - Main extraction class
*/
export class TreeSitterExtractor {
private filePath: string;
private language: Language;
private source: string;
private tree: Tree | null = null;
private nodes: Node[] = [];
private edges: Edge[] = [];
private unresolvedReferences: UnresolvedReference[] = [];
private errors: ExtractionError[] = [];
private extractor: LanguageExtractor | null = null;
private nodeStack: string[] = []; // Stack of parent node IDs
private methodIndex: Map<string, string> | null = null; // lookup key → node ID for Pascal defProc lookup
constructor(filePath: string, source: string, language?: Language) {
this.filePath = filePath;
this.source = source;
this.language = language || detectLanguage(filePath, source);
this.extractor = EXTRACTORS[this.language] || null;
}
/**
* Parse and extract from the source code
*/
extract(): ExtractionResult {
const startTime = Date.now();
if (!isLanguageSupported(this.language)) {
return {
nodes: [],
edges: [],
unresolvedReferences: [],
errors: [
{
message: `Unsupported language: ${this.language}`,
filePath: this.filePath,
severity: 'error',
code: 'unsupported_language',
},
],
durationMs: Date.now() - startTime,
};
}
const parser = getParser(this.language);
if (!parser) {
return {
nodes: [],
edges: [],
unresolvedReferences: [],
errors: [
{
message: `Failed to get parser for language: ${this.language}`,
filePath: this.filePath,
severity: 'error',
code: 'parser_error',
},
],
durationMs: Date.now() - startTime,
};
}
try {
// Optional pre-parse source transform (offset-preserving) to work around
// grammar gaps — e.g. C# blanks conditional-compilation directive lines
// the grammar mis-parses inside enum bodies (#237). We reassign
// this.source so downstream getNodeText reads the same bytes the parser
// saw (identical outside the blanked directive lines).
if (this.extractor?.preParse) {
this.source = this.extractor.preParse(this.source);
}
this.tree = parser.parse(this.source) ?? null;
if (!this.tree) {
throw new Error('Parser returned null tree');
}
// Create file node representing the source file
const fileNode: Node = {
id: `file:${this.filePath}`,
kind: 'file',
name: path.basename(this.filePath),
qualifiedName: this.filePath,
filePath: this.filePath,
language: this.language,
startLine: 1,
endLine: this.source.split('\n').length,
startColumn: 0,
endColumn: 0,
isExported: false,
updatedAt: Date.now(),
};
this.nodes.push(fileNode);
// Push file node onto stack so top-level declarations get contains edges
this.nodeStack.push(fileNode.id);
// File-level package declaration (Kotlin/Java). Creates an implicit
// `namespace` node wrapping every top-level declaration so their
// qualifiedName carries the FQN — required for cross-file import
// resolution on JVM languages where filename ≠ class name.
const packageNodeId = this.extractFilePackage(this.tree.rootNode);
if (packageNodeId) this.nodeStack.push(packageNodeId);
this.visitNode(this.tree.rootNode);
if (packageNodeId) this.nodeStack.pop();
this.nodeStack.pop();
} catch (error) {
const msg = error instanceof Error ? error.message : String(error);
// WASM memory errors leave the module in a corrupted state — all subsequent
// parses would also fail. Re-throw so the worker can detect and crash,
// forcing a clean restart with a fresh heap.
if (msg.includes('memory access out of bounds') || msg.includes('out of memory')) {
throw error;
}
this.errors.push({
message: `Parse error: ${msg}`,
filePath: this.filePath,
severity: 'error',
code: 'parse_error',
});
} finally {
// Free tree-sitter WASM memory immediately — trees hold native heap memory
// invisible to V8's GC that accumulates across thousands of files.
if (this.tree) {
this.tree.delete();
this.tree = null;
}
// Release source string to reduce GC pressure
this.source = '';
}
return {
nodes: this.nodes,
edges: this.edges,
unresolvedReferences: this.unresolvedReferences,
errors: this.errors,
durationMs: Date.now() - startTime,
};
}
/**
* Visit a node and extract information
*/
private visitNode(node: SyntaxNode): void {
if (!this.extractor) return;
const nodeType = node.type;
let skipChildren = false;
// Language-specific custom visitor hook
if (this.extractor.visitNode) {
const ctx = this.makeExtractorContext();
const handled = this.extractor.visitNode(node, ctx);
if (handled) return;
}
// Pascal-specific AST handling
if (this.language === 'pascal') {
skipChildren = this.visitPascalNode(node);
if (skipChildren) return;
}
// Check for function declarations
// For Python/Ruby, function_definition inside a class should be treated as method
if (this.extractor.functionTypes.includes(nodeType)) {
if (this.isInsideClassLikeNode() && this.extractor.methodTypes.includes(nodeType)) {
// Inside a class - treat as method
this.extractMethod(node);
skipChildren = true; // extractMethod visits children via visitFunctionBody
} else {
this.extractFunction(node);
skipChildren = true; // extractFunction visits children via visitFunctionBody
}
}
// Check for class declarations
else if (this.extractor.classTypes.includes(nodeType)) {
// Some languages reuse class_declaration for structs/enums (e.g. Swift)
const classification = this.extractor.classifyClassNode?.(node) ?? 'class';
if (classification === 'struct') {
this.extractStruct(node);
} else if (classification === 'enum') {
this.extractEnum(node);
} else if (classification === 'interface') {
this.extractInterface(node);
} else if (classification === 'trait') {
this.extractClass(node, 'trait');
} else {
this.extractClass(node);
}
skipChildren = true; // extractClass visits body children
}
// Extra class node types (e.g. Dart mixin_declaration, extension_declaration)
else if (this.extractor.extraClassNodeTypes?.includes(nodeType)) {
this.extractClass(node);
skipChildren = true;
}
// Check for method declarations (only if not already handled by functionTypes)
else if (this.extractor.methodTypes.includes(nodeType)) {
this.extractMethod(node);
skipChildren = true; // extractMethod visits children via visitFunctionBody
}
// Check for interface/protocol/trait declarations
else if (this.extractor.interfaceTypes.includes(nodeType)) {
this.extractInterface(node);
skipChildren = true; // extractInterface visits body children
}
// Check for struct declarations
else if (this.extractor.structTypes.includes(nodeType)) {
this.extractStruct(node);
skipChildren = true; // extractStruct visits body children
}
// Check for enum declarations
else if (this.extractor.enumTypes.includes(nodeType)) {
this.extractEnum(node);
skipChildren = true; // extractEnum visits body children
}
// Check for type alias declarations (e.g. `type X = ...` in TypeScript)
// For Go, type_spec wraps struct/interface definitions — resolveTypeAliasKind
// detects these and extractTypeAlias creates the correct node kind.
else if (this.extractor.typeAliasTypes.includes(nodeType)) {
skipChildren = this.extractTypeAlias(node);
}
// Check for class properties (e.g. C# property_declaration)
else if (this.extractor.propertyTypes?.includes(nodeType) && this.isInsideClassLikeNode()) {
this.extractProperty(node);
skipChildren = true;
}
// Check for class fields (e.g. Java field_declaration, C# field_declaration)
else if (this.extractor.fieldTypes?.includes(nodeType) && this.isInsideClassLikeNode()) {
this.extractField(node);
skipChildren = true;
}
// Check for variable declarations (const, let, var, etc.)
// Only extract top-level variables (not inside functions/methods)
else if (this.extractor.variableTypes.includes(nodeType) && !this.isInsideClassLikeNode()) {
this.extractVariable(node);
skipChildren = true; // extractVariable handles children
}
// Swift stored properties inside a type. Swift instance properties aren't
// extracted as their own nodes, but a property's PROPERTY WRAPPER
// (`@Argument`/`@Published`/`@State`/custom) and declared type ARE
// dependencies — attribute them to the enclosing type so the wrapper/type
// files get dependents. Don't skipChildren: an initializer's calls still
// matter. (Other languages extract properties via property/field types.)
else if (
this.language === 'swift' &&
nodeType === 'property_declaration' &&
this.isInsideClassLikeNode()
) {
const ownerId = this.nodeStack[this.nodeStack.length - 1];
if (ownerId) {
this.extractDecoratorsFor(node, ownerId);
this.extractVariableTypeAnnotation(node, ownerId);
// Fluent / SwiftUI property-wrapper attributes often reference a model or
// type by metatype in their ARGUMENTS — `@Siblings(through: Pivot.self,
// …)`, `@Group(…)`. extractDecoratorsFor captures the wrapper type
// (`Siblings`); this pulls the TYPE out of the argument expressions
// (`Pivot.self` → a dependency on Pivot), so a model reached ONLY through
// a relationship (a many-to-many pivot/join model) isn't left orphaned.
// extractStaticMemberRef self-filters to `Type.member` navigation, so the
// `\.$keypath` arguments and the wrapper `user_type` are skipped.
const modifiers = node.namedChildren.find((c: SyntaxNode) => c.type === 'modifiers');
if (modifiers) {
const walkAttrArgs = (n: SyntaxNode): void => {
this.extractStaticMemberRef(n);
for (let i = 0; i < n.namedChildCount; i++) {
const c = n.namedChild(i);
if (c) walkAttrArgs(c);
}
};
walkAttrArgs(modifiers);
}
}
}
// `export_statement` itself is not extracted — the walker descends
// into children, where the inner declaration (lexical_declaration,
// function_declaration, class_declaration, etc.) is dispatched to
// its own extractor. `isExported` walks the parent chain, so the
// exported flag is preserved automatically.
//
// Calling extractExportedVariables here AND descending caused every
// `export const X = ...` to produce two nodes for the same symbol —
// one kind:'variable' from extractExportedVariables and one
// kind:'constant' from extractVariable. The dedicated dispatch is
// the correct one (it picks kind from isConst, captures the
// initializer signature, and walks type annotations); the
// export-statement helper was redundant.
// Check for imports
else if (this.extractor.importTypes.includes(nodeType)) {
this.extractImport(node);
}
// Re-export from another module — `export { X } from './y'` (TS/JS). A
// re-export is a dependency on the source module just like an import, but
// the export_statement is otherwise only descended into (no declaration to
// extract), so a barrel that ONLY re-exports produced zero edges and showed
// 0 dependents. Link each re-exported name to its definition. Children are
// still visited (a non-re-export `export const X = …` has no `source` and
// falls through to its normal declaration extraction).
else if (
nodeType === 'export_statement' &&
(this.language === 'typescript' || this.language === 'tsx' ||
this.language === 'javascript' || this.language === 'jsx') &&
getChildByField(node, 'source')
) {
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) this.emitReExportRefs(node, parentId);
}
// Check for function calls
else if (this.extractor.callTypes.includes(nodeType)) {
this.extractCall(node);
}
// `new Foo(...)` / `Foo::new(...)` / object_creation_expression —
// produce an `instantiates` reference. Children still walked so
// nested calls inside the constructor args (`new Foo(bar())`) get
// their own `calls` refs.
else if (INSTANTIATION_KINDS.has(nodeType)) {
this.extractInstantiation(node);
// Java/C# `new T(...) { ... }` — anonymous class with body. Without
// extracting it as a class node + its methods, the interface→impl
// synthesizer (Phase 5.5) can't bridge T's abstract methods to the
// anonymous overrides, and an agent investigating a call through T
// (`strategy.iterator(...)` where strategy is a Strategy lambda body)
// has to Read the file to find the actual implementation.
const anonBody = this.findAnonymousClassBody(node);
if (anonBody) {
this.extractAnonymousClass(node, anonBody);
skipChildren = true;
}
}
// (Decorator handling lives inside the symbol-creating extractors
// — extractClass / extractFunction / extractProperty — because the
// decorator node sits BEFORE the symbol in the AST and the walker
// would otherwise see the wrong nodeStack head.)
// Rust: `impl Trait for Type { ... }` — creates implements edge from Type to Trait
else if (nodeType === 'impl_item') {
this.extractRustImplItem(node);
}
// TypeScript interface members: property_signature (`foo: T`, `foo?: T`)
// and method_signature (`foo(arg: A): R`) both carry type annotations the
// interface walker would otherwise drop. Extract them as `references`
// edges from the interface so resolvers can wire callers/impact for
// types that only appear in interface members.
else if (
(nodeType === 'property_signature' || nodeType === 'method_signature') &&
this.isInsideClassLikeNode() &&
this.TYPE_ANNOTATION_LANGUAGES.has(this.language)
) {
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) {
this.extractTypeAnnotations(node, parentId);
}
// don't skipChildren — nested signatures still need traversal
}
// Visit children (unless the extract method already visited them)
if (!skipChildren) {
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child) {
this.visitNode(child);
}
}
}
}
/**
* Create a Node object
*/
private createNode(
kind: NodeKind,
name: string,
node: SyntaxNode,
extra?: Partial<Node>
): Node | null {
// Skip nodes with empty/missing names — they are not meaningful symbols
// and would cause FK violations when edges reference them (see issue #42)
if (!name) {
return null;
}
const id = generateNodeId(this.filePath, kind, name, node.startPosition.row + 1);
// Some grammars (e.g. Dart) model a function/method body as a *sibling* of
// the signature node, so the declaration node's own range is just the
// signature line. Extend endLine to the resolved body when it sits beyond
// the node so the node spans its body — required for any body-level analysis
// (callees, the callback synthesizer's body scan, context slices). Guarded to
// only ever extend: for child-body grammars the body is within range (no-op).
let endLine = node.endPosition.row + 1;
if (kind === 'function' || kind === 'method') {
const body = this.extractor?.resolveBody?.(node, this.extractor.bodyField);
if (body && body.endPosition.row + 1 > endLine) {
endLine = body.endPosition.row + 1;
}
}
const newNode: Node = {
id,
kind,
name,
qualifiedName: this.buildQualifiedName(name),
filePath: this.filePath,
language: this.language,
startLine: node.startPosition.row + 1,
endLine,
startColumn: node.startPosition.column,
endColumn: node.endPosition.column,
updatedAt: Date.now(),
...extra,
};
// Persist extra symbol-level modifiers (e.g. Kotlin `expect`/`actual`) onto
// the node's decorators list so the resolver can pair multiplatform
// declarations with their implementations. Merged, not overwritten, so a
// language that also captures real annotations keeps both.
const mods = this.extractor?.extractModifiers?.(node);
if (mods && mods.length > 0) {
newNode.decorators = [...(newNode.decorators ?? []), ...mods];
}
this.nodes.push(newNode);
// Add containment edge from parent
if (this.nodeStack.length > 0) {
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) {
this.edges.push({
source: parentId,
target: id,
kind: 'contains',
});
}
}
return newNode;
}
/**
* Find first named child whose type is in the given list.
* Used to locate inner type nodes (e.g. enum_specifier inside a typedef).
*/
private findChildByTypes(node: SyntaxNode, types: string[]): SyntaxNode | null {
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child && types.includes(child.type)) return child;
}
return null;
}
/**
* Find a `packageTypes` child under the root, create a `namespace` node
* for it, and return its id so the caller can scope top-level
* declarations underneath. Returns null when no package header is
* present (script files, .kts without a package).
*/
private extractFilePackage(rootNode: SyntaxNode): string | null {
const types = this.extractor?.packageTypes;
if (!types || types.length === 0 || !this.extractor?.extractPackage) return null;
let pkgNode: SyntaxNode | null = null;
for (let i = 0; i < rootNode.namedChildCount; i++) {
const child = rootNode.namedChild(i);
if (child && types.includes(child.type)) {
pkgNode = child;
break;
}
}
if (!pkgNode) return null;
const pkgName = this.extractor.extractPackage(pkgNode, this.source);
if (!pkgName) return null;
const ns = this.createNode('namespace', pkgName, pkgNode);
return ns?.id ?? null;
}
/**
* Build qualified name from node stack
*/
private buildQualifiedName(name: string): string {
// Build a qualified name from the semantic hierarchy only (no file path).
// The file path is stored separately in filePath and pollutes FTS if included here.
const parts: string[] = [];
for (const nodeId of this.nodeStack) {
const node = this.nodes.find((n) => n.id === nodeId);
if (node && node.kind !== 'file') {
parts.push(node.name);
}
}
parts.push(name);
return parts.join('::');
}
/**
* Build an ExtractorContext for passing to language-specific visitNode hooks.
*/
private makeExtractorContext(): ExtractorContext {
// eslint-disable-next-line @typescript-eslint/no-this-alias
const self = this;
return {
createNode: (kind, name, node, extra) => self.createNode(kind, name, node, extra),
visitNode: (node) => self.visitNode(node),
visitFunctionBody: (body, functionId) => self.visitFunctionBody(body, functionId),
addUnresolvedReference: (ref) => self.unresolvedReferences.push(ref),
pushScope: (nodeId) => self.nodeStack.push(nodeId),
popScope: () => self.nodeStack.pop(),
get filePath() { return self.filePath; },
get source() { return self.source; },
get nodeStack() { return self.nodeStack; },
get nodes() { return self.nodes; },
};
}
/**
* Check if the current node stack indicates we are inside a class-like node
* (class, struct, interface, trait). File nodes do not count as class-like.
*/
private isInsideClassLikeNode(): boolean {
if (this.nodeStack.length === 0) return false;
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (!parentId) return false;
const parentNode = this.nodes.find((n) => n.id === parentId);
if (!parentNode) return false;
return (
parentNode.kind === 'class' ||
parentNode.kind === 'struct' ||
parentNode.kind === 'interface' ||
parentNode.kind === 'trait' ||
parentNode.kind === 'enum' ||
parentNode.kind === 'module'
);
}
/**
* Extract a function
*/
private extractFunction(node: SyntaxNode, nameOverride?: string): void {
if (!this.extractor) return;
// If the language provides getReceiverType and this function has a receiver
// (e.g., Rust function_item inside an impl block), extract as method instead
if (this.extractor.getReceiverType?.(node, this.source)) {
this.extractMethod(node);
return;
}
// nameOverride is supplied only for explicitly-named anonymous functions the
// caller resolved itself (e.g. arrow values of exported-const object members
// — SvelteKit actions). Inline-object arrows reached by the general walker
// get no override, so they still fall through to the <anonymous> skip below.
let name = nameOverride ?? extractName(node, this.source, this.extractor);
// For arrow functions and function expressions assigned to variables,
// resolve the name from the parent variable_declarator.
// e.g. `export const useAuth = () => { ... }` — the arrow_function node
// has no `name` field; the name lives on the variable_declarator.
if (
!nameOverride &&
name === '<anonymous>' &&
(node.type === 'arrow_function' || node.type === 'function_expression')
) {
const parent = node.parent;
if (parent?.type === 'variable_declarator') {
const varName = getChildByField(parent, 'name');
if (varName) {
name = getNodeText(varName, this.source);
}
}
}
if (name === '<anonymous>') {
// Don't emit a node for the anonymous wrapper itself, but still visit its
// body: AMD/RequireJS and CommonJS module wrappers (`define([], function(){…})`,
// `(function(){…})()`) hold named inner functions and calls that would
// otherwise be lost — the dispatcher set skipChildren, so nothing else
// descends into this subtree. (#528)
const body = this.extractor.resolveBody?.(node, this.extractor.bodyField)
?? getChildByField(node, this.extractor.bodyField);
if (body) {
this.visitFunctionBody(body, '');
}
return;
}
// Check for misparse artifacts (e.g. C++ macros causing "namespace detail" functions)
// Skip the node but still visit the body for calls and structural nodes
if (this.extractor.isMisparsedFunction?.(name, node)) {
const body = this.extractor.resolveBody?.(node, this.extractor.bodyField)
?? getChildByField(node, this.extractor.bodyField);
if (body) {
this.visitFunctionBody(body, '');
}
return;
}
const docstring = getPrecedingDocstring(node, this.source);
const signature = this.extractor.getSignature?.(node, this.source);
const visibility = this.extractor.getVisibility?.(node);
const isExported = this.extractor.isExported?.(node, this.source);
const isAsync = this.extractor.isAsync?.(node);
const isStatic = this.extractor.isStatic?.(node);
const returnType = this.extractor.getReturnType?.(node, this.source);
const funcNode = this.createNode('function', name, node, {
docstring,
signature,
visibility,
isExported,
isAsync,
isStatic,
returnType,
});
if (!funcNode) return;
// Extract type annotations (parameter types and return type)
this.extractTypeAnnotations(node, funcNode.id);
// Extract decorators applied to the function (rare in JS/TS but
// present in Python `@decorator def f():` and Java/Kotlin
// annotations on free functions).
this.extractDecoratorsFor(node, funcNode.id);
// Push to stack and visit body
this.nodeStack.push(funcNode.id);
const body = this.extractor.resolveBody?.(node, this.extractor.bodyField)
?? getChildByField(node, this.extractor.bodyField);
if (body) {
this.visitFunctionBody(body, funcNode.id);
}
this.nodeStack.pop();
}
/**
* Extract a class
*/
private extractClass(node: SyntaxNode, kind: NodeKind = 'class'): void {
if (!this.extractor) return;
const name = extractName(node, this.source, this.extractor);
const docstring = getPrecedingDocstring(node, this.source);
const visibility = this.extractor.getVisibility?.(node);
const isExported = this.extractor.isExported?.(node, this.source);
const classNode = this.createNode(kind, name, node, {
docstring,
visibility,
isExported,
});
if (!classNode) return;
// Extract extends/implements
this.extractInheritance(node, classNode.id);
// C# primary-constructor parameter dependencies (`class Svc(IRepo r, …)`).
this.extractCsharpPrimaryCtorParamRefs(node, classNode.id);
// Extract decorators applied to the class (`@Foo class X {}`).
this.extractDecoratorsFor(node, classNode.id);
// Push to stack and visit body
this.nodeStack.push(classNode.id);
let body = this.extractor.resolveBody?.(node, this.extractor.bodyField)
?? getChildByField(node, this.extractor.bodyField);
if (!body) body = node;
// Visit all children for methods and properties
for (let i = 0; i < body.namedChildCount; i++) {
const child = body.namedChild(i);
if (child) {
this.visitNode(child);
}
}
this.nodeStack.pop();
}
/**
* Extract a method
*/
private extractMethod(node: SyntaxNode): void {
if (!this.extractor) return;
// For languages with receiver types (Go, Rust), include receiver in qualified name
// so FTS can match "scrapeLoop.run" → qualified_name "...::scrapeLoop::run"
const receiverType = this.extractor.getReceiverType?.(node, this.source);
// For most languages, only extract as method if inside a class-like node
// Languages with methodsAreTopLevel (e.g. Go) always treat them as methods
// Languages with getReceiverType (e.g. Rust) extract as method when receiver is found
if (!this.isInsideClassLikeNode() && !this.extractor.methodsAreTopLevel && !receiverType) {
// Skip method_definition nodes inside object literals (getters/setters/methods
// in inline objects). These are ephemeral and create noise (e.g., Svelte context
// objects: `ctx.set({ get view() { ... } })`).
if (node.parent?.type === 'object' || node.parent?.type === 'object_expression') {
const body = this.extractor.resolveBody?.(node, this.extractor.bodyField)
?? getChildByField(node, this.extractor.bodyField);
if (body) {
this.visitFunctionBody(body, '');
}
return;
}
// Not inside a class-like node and no receiver type, treat as function
this.extractFunction(node);
return;
}
const name = extractName(node, this.source, this.extractor);
// Check for misparse artifacts (e.g. C++ "switch" inside macro-confused class body)
if (this.extractor.isMisparsedFunction?.(name, node)) {
const body = this.extractor.resolveBody?.(node, this.extractor.bodyField)
?? getChildByField(node, this.extractor.bodyField);
if (body) {
this.visitFunctionBody(body, '');
}
return;
}
const docstring = getPrecedingDocstring(node, this.source);
const signature = this.extractor.getSignature?.(node, this.source);
const visibility = this.extractor.getVisibility?.(node);
const isAsync = this.extractor.isAsync?.(node);
const isStatic = this.extractor.isStatic?.(node);
const returnType = this.extractor.getReturnType?.(node, this.source);
const extraProps: Partial<Node> = {
docstring,
signature,
visibility,
isAsync,
isStatic,
returnType,
};
if (receiverType) {
extraProps.qualifiedName = `${receiverType}::${name}`;
}
const methodNode = this.createNode('method', name, node, extraProps);
if (!methodNode) return;
// For methods with a receiver type but no class-like parent on the stack
// (e.g., Rust impl blocks), add a contains edge from the owning struct/trait
if (receiverType && !this.isInsideClassLikeNode()) {
const ownerNode = this.nodes.find(
(n) =>
n.name === receiverType &&
n.filePath === this.filePath &&
(n.kind === 'struct' || n.kind === 'class' || n.kind === 'enum' || n.kind === 'trait')
);
if (ownerNode) {
this.edges.push({
source: ownerNode.id,
target: methodNode.id,
kind: 'contains',
});
}
}
// Extract type annotations (parameter types and return type)
this.extractTypeAnnotations(node, methodNode.id);
// Extract decorators (`@Get('/list') list() {}`).
this.extractDecoratorsFor(node, methodNode.id);
// Push to stack and visit body
this.nodeStack.push(methodNode.id);
const body = this.extractor.resolveBody?.(node, this.extractor.bodyField)
?? getChildByField(node, this.extractor.bodyField);
if (body) {
this.visitFunctionBody(body, methodNode.id);
}
this.nodeStack.pop();
}
/**
* Extract an interface/protocol/trait
*/
private extractInterface(node: SyntaxNode): void {
if (!this.extractor) return;
const name = extractName(node, this.source, this.extractor);
const docstring = getPrecedingDocstring(node, this.source);
const isExported = this.extractor.isExported?.(node, this.source);
const kind: NodeKind = this.extractor.interfaceKind ?? 'interface';
const interfaceNode = this.createNode(kind, name, node, {
docstring,
isExported,
});
if (!interfaceNode) return;
// Extract extends (interface inheritance)
this.extractInheritance(node, interfaceNode.id);
// Visit body children for interface methods and nested types
this.nodeStack.push(interfaceNode.id);
let body = this.extractor.resolveBody?.(node, this.extractor.bodyField)
?? getChildByField(node, this.extractor.bodyField);
if (!body) body = node;
for (let i = 0; i < body.namedChildCount; i++) {
const child = body.namedChild(i);
if (child) {
this.visitNode(child);
}
}
this.nodeStack.pop();
}
/**
* Extract a struct
*/
private extractStruct(node: SyntaxNode): void {
if (!this.extractor) return;
// Skip forward declarations and type references (no body = not a definition)
const body = getChildByField(node, this.extractor.bodyField);
if (!body) return;
const name = extractName(node, this.source, this.extractor);
const docstring = getPrecedingDocstring(node, this.source);
const visibility = this.extractor.getVisibility?.(node);
const isExported = this.extractor.isExported?.(node, this.source);
const structNode = this.createNode('struct', name, node, {
docstring,
visibility,
isExported,
});
if (!structNode) return;
// Extract inheritance (e.g. Swift: struct HTTPMethod: RawRepresentable)
this.extractInheritance(node, structNode.id);
// C# primary-constructor parameter dependencies (`struct P(int x)`, and
// `record struct M(decimal Amount)` which the grammar nests here).
this.extractCsharpPrimaryCtorParamRefs(node, structNode.id);
// Push to stack for field extraction
this.nodeStack.push(structNode.id);
for (let i = 0; i < body.namedChildCount; i++) {
const child = body.namedChild(i);
if (child) {
this.visitNode(child);
}
}
this.nodeStack.pop();
}
/**
* Extract an enum
*/
private extractEnum(node: SyntaxNode): void {
if (!this.extractor) return;
// Skip forward declarations and type references (no body = not a definition)
const body = this.extractor.resolveBody?.(node, this.extractor.bodyField)
?? getChildByField(node, this.extractor.bodyField);
if (!body) return;
const name = extractName(node, this.source, this.extractor);
const docstring = getPrecedingDocstring(node, this.source);
const visibility = this.extractor.getVisibility?.(node);
const isExported = this.extractor.isExported?.(node, this.source);
const enumNode = this.createNode('enum', name, node, {
docstring,
visibility,
isExported,
});
if (!enumNode) return;
// Extract inheritance (e.g. Swift: enum AFError: Error)
this.extractInheritance(node, enumNode.id);
// Push to stack and visit body children (enum members, nested types, methods)
this.nodeStack.push(enumNode.id);
const memberTypes = this.extractor.enumMemberTypes;
for (let i = 0; i < body.namedChildCount; i++) {
const child = body.namedChild(i);
if (!child) continue;
if (memberTypes?.includes(child.type)) {
this.extractEnumMembers(child);
} else {
this.visitNode(child);
}
}
this.nodeStack.pop();
}
/**
* Extract enum member names from an enum member node.
* Handles multi-case declarations (Swift: `case put, delete`) and single-case patterns.
*/
private extractEnumMembers(node: SyntaxNode): void {
// Try field-based name first (e.g. Rust enum_variant has a 'name' field)
const nameNode = getChildByField(node, 'name');
if (nameNode) {
this.createNode('enum_member', getNodeText(nameNode, this.source), node);
return;
}
// Check for identifier-like children (Swift: simple_identifier, TS: property_identifier)
let found = false;
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child && (child.type === 'simple_identifier' || child.type === 'identifier' || child.type === 'property_identifier')) {
this.createNode('enum_member', getNodeText(child, this.source), child);
found = true;
}
}
// If the node itself IS the identifier (e.g. TS property_identifier directly in enum body)
if (!found && node.namedChildCount === 0) {
this.createNode('enum_member', getNodeText(node, this.source), node);
}
}
/**
* Extract a class property declaration (e.g. C# `public string Name { get; set; }`).
* Extracts as 'property' kind node inside the owning class.
*/
private extractProperty(node: SyntaxNode): void {
if (!this.extractor) return;
const docstring = getPrecedingDocstring(node, this.source);
const visibility = this.extractor.getVisibility?.(node);
const isStatic = this.extractor.isStatic?.(node) ?? false;
const hookName = this.extractor.extractPropertyName?.(node, this.source);
const nameNode = hookName
? null
: getChildByField(node, 'name') || node.namedChildren.find(c => c.type === 'identifier');
const name = hookName ?? (nameNode ? getNodeText(nameNode, this.source) : null);
if (!name) return;
// Get property type from the type child (first named child that isn't modifier or identifier)
const typeNode = node.namedChildren.find(
c => c.type !== 'modifier' && c.type !== 'modifiers'
&& c.type !== 'identifier' && c.type !== 'accessor_list'
&& c.type !== 'accessors' && c.type !== 'equals_value_clause'
);
const typeText = typeNode ? getNodeText(typeNode, this.source) : undefined;
const signature = typeText ? `${typeText} ${name}` : name;
const propNode = this.createNode('property', name, node, {
docstring,
signature,
visibility,
isStatic,
});
// `@Inject() private svc: Foo` and similar — capture the
// decorator->target relationship for class properties too.
if (propNode) {
this.extractDecoratorsFor(node, propNode.id);
// Emit `references` edges from the property to types named in its
// type annotation (#381). The generic walker handles TS-style
// `type_annotation` children; the C# branch walks the `type` field.
this.extractTypeAnnotations(node, propNode.id);
}
}
/**
* Extract a class field declaration (e.g. Java field_declaration, C# field_declaration).
* Extracts each declarator as a 'field' kind node inside the owning class.
*/
private extractField(node: SyntaxNode): void {
if (!this.extractor) return;
const docstring = getPrecedingDocstring(node, this.source);
const visibility = this.extractor.getVisibility?.(node);
const isStatic = this.extractor.isStatic?.(node) ?? false;
// Java field_declaration: "private final String name = value;" → variable_declarator(s) are direct children
// C# field_declaration: wraps in variable_declaration → variable_declarator(s)
let declarators = node.namedChildren.filter(
c => c.type === 'variable_declarator'
);
// C#: look inside variable_declaration wrapper
if (declarators.length === 0) {
const varDecl = node.namedChildren.find(c => c.type === 'variable_declaration');
if (varDecl) {
declarators = varDecl.namedChildren.filter(c => c.type === 'variable_declarator');
}
}
// PHP property_declaration: property_element → variable_name → name
if (declarators.length === 0) {
const propElements = node.namedChildren.filter(c => c.type === 'property_element');
if (propElements.length > 0) {
// Get type annotation if present (e.g. "string", "int", "?Foo")
const typeNode = node.namedChildren.find(
c => c.type !== 'visibility_modifier' && c.type !== 'static_modifier'
&& c.type !== 'readonly_modifier' && c.type !== 'property_element'
&& c.type !== 'var_modifier'
);
const typeText = typeNode ? getNodeText(typeNode, this.source) : undefined;
for (const elem of propElements) {
const varName = elem.namedChildren.find(c => c.type === 'variable_name');
const nameNode = varName?.namedChildren.find(c => c.type === 'name');
if (!nameNode) continue;
const name = getNodeText(nameNode, this.source);
const signature = typeText ? `${typeText} $${name}` : `$${name}`;
this.createNode('field', name, elem, {
docstring,
signature,
visibility,
isStatic,
});
}
return;
}
}
if (declarators.length > 0) {
// Get field type from the type child
// Java: type is a direct child of field_declaration
// C#: type is inside variable_declaration wrapper
const varDecl = node.namedChildren.find(c => c.type === 'variable_declaration');
const typeSearchNode = varDecl ?? node;
const typeNode = typeSearchNode.namedChildren.find(
c => c.type !== 'modifiers' && c.type !== 'modifier' && c.type !== 'variable_declarator'
&& c.type !== 'variable_declaration' && c.type !== 'marker_annotation' && c.type !== 'annotation'
);
const typeText = typeNode ? getNodeText(typeNode, this.source) : undefined;
for (const decl of declarators) {
const nameNode = getChildByField(decl, 'name')
|| decl.namedChildren.find(c => c.type === 'identifier');
if (!nameNode) continue;
const name = getNodeText(nameNode, this.source);
const signature = typeText ? `${typeText} ${name}` : name;
const fieldNode = this.createNode('field', name, decl, {
docstring,
signature,
visibility,
isStatic,
});
// Java/Kotlin annotations / TS field decorators sit on the
// outer field_declaration, not on the individual declarator.
if (fieldNode) {
this.extractDecoratorsFor(node, fieldNode.id);
// Same as properties: emit `references` to the field's annotated
// type. The outer `field_declaration` is the right scope to
// search from — C# carries the `type` inside `variable_declaration`
// and the language-aware path in `extractTypeAnnotations` descends
// into that wrapper (#381).
this.extractTypeAnnotations(node, fieldNode.id);
}
}
} else {
// Fallback: try to find an identifier child directly
const nameNode = getChildByField(node, 'name')
|| node.namedChildren.find(c => c.type === 'identifier');
if (nameNode) {
const name = getNodeText(nameNode, this.source);
this.createNode('field', name, node, {
docstring,
visibility,
isStatic,
});
}
}
}
/**
* Extract function-valued properties of an object literal as named function
* nodes (named by their property key). Shared by the two object-of-functions
* shapes in extractVariable: the object as a direct const value, and the
* object returned by a store-initializer call. Handles both `key: () => {}` /
* `key: function() {}` pairs and method shorthand `key() {}`.
*/
private extractObjectLiteralFunctions(obj: SyntaxNode): void {
for (let i = 0; i < obj.namedChildCount; i++) {
const member = obj.namedChild(i);
if (!member) continue;
if (member.type === 'pair') {
const key = getChildByField(member, 'key');
const value = getChildByField(member, 'value');
if (key && value && (value.type === 'arrow_function' || value.type === 'function_expression')) {
this.extractFunction(value, this.objectKeyName(key));
}
} else if (member.type === 'method_definition') {
// Method shorthand: `{ fetchUser() {...} }`. extractMethod deliberately
// skips object-literal methods, so route through extractFunction with an
// explicit name (method_definition exposes a `body` field, so resolveBody
// falls through to it and the node spans the full method).
const key = getChildByField(member, 'name');
if (key) this.extractFunction(member, this.objectKeyName(key));
}
}
}
/** Property-key text with surrounding quotes stripped (`'foo'` → `foo`). */
private objectKeyName(key: SyntaxNode): string {
return getNodeText(key, this.source).replace(/^['"`]|['"`]$/g, '');
}
/**
* Given a `call_expression` initializer (`create((set, get) => ({...}))`),
* find the object literal RETURNED by a function argument — descending through
* nested call_expression arguments so middleware wrappers are unwrapped
* (`create(persist((set, get) => ({...}), {...}))`, devtools, immer,
* subscribeWithSelector). Returns null when no such object is found — the
* common case for ordinary call initializers — so this stays cheap and silent
* rather than guessing. Keyed purely on AST shape; no library names.
*/
private findInitializerReturnedObject(callNode: SyntaxNode, depth = 0): SyntaxNode | null {
if (depth > 4) return null;
const args = getChildByField(callNode, 'arguments');
if (!args) return null;
for (let i = 0; i < args.namedChildCount; i++) {
const arg = args.namedChild(i);
if (!arg) continue;
if (arg.type === 'arrow_function' || arg.type === 'function_expression') {
const obj = this.functionReturnedObject(arg);
if (obj) return obj;
} else if (arg.type === 'call_expression') {
const obj = this.findInitializerReturnedObject(arg, depth + 1);
if (obj) return obj;
}
}
return null;
}
/**
* The object literal a function expression returns — either the `=> ({...})`
* arrow form (a parenthesized_expression wrapping an object) or a
* `=> { return {...} }` block. Returns null for any other body shape.
*/
private functionReturnedObject(fnNode: SyntaxNode): SyntaxNode | null {
const body = getChildByField(fnNode, 'body');
if (!body) return null;
const asObject = (n: SyntaxNode | null): SyntaxNode | null => {
if (!n) return null;
if (n.type === 'object' || n.type === 'object_expression') return n;
if (n.type === 'parenthesized_expression') {
for (let i = 0; i < n.namedChildCount; i++) {
const inner = asObject(n.namedChild(i));
if (inner) return inner;
}
}
return null;
};
// `(set, get) => ({...})` — body is the (parenthesized) object directly.
const direct = asObject(body);
if (direct) return direct;
// `(set, get) => { return {...} }` — scan top-level return statements.
if (body.type === 'statement_block') {
for (let i = 0; i < body.namedChildCount; i++) {
const stmt = body.namedChild(i);
if (stmt?.type !== 'return_statement') continue;
for (let j = 0; j < stmt.namedChildCount; j++) {
const obj = asObject(stmt.namedChild(j));
if (obj) return obj;
}
}
}
return null;
}
/**
* Extract a variable declaration (const, let, var, etc.)
*
* Extracts top-level and module-level variable declarations.
* Captures the variable name and first 100 chars of initializer in signature for searchability.
*/
private extractVariable(node: SyntaxNode): void {
if (!this.extractor) return;
// Different languages have different variable declaration structures
// TypeScript/JavaScript: lexical_declaration contains variable_declarator children
// Python: assignment has left (identifier) and right (value)
// Go: var_declaration, short_var_declaration, const_declaration
const isConst = this.extractor.isConst?.(node) ?? false;
const kind: NodeKind = isConst ? 'constant' : 'variable';
const docstring = getPrecedingDocstring(node, this.source);
const isExported = this.extractor.isExported?.(node, this.source) ?? false;
// Extract variable declarators based on language
if (this.language === 'typescript' || this.language === 'javascript' ||
this.language === 'tsx' || this.language === 'jsx') {
// Handle lexical_declaration and variable_declaration
// These contain one or more variable_declarator children
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child?.type === 'variable_declarator') {
const nameNode = getChildByField(child, 'name');
const valueNode = getChildByField(child, 'value');
if (nameNode) {
// Skip destructured patterns (e.g., `let { x, y } = $props()` in Svelte)
// These produce ugly multi-line names like "{ class: className }"
if (nameNode.type === 'object_pattern' || nameNode.type === 'array_pattern') {
continue;
}
const name = getNodeText(nameNode, this.source);
// Arrow functions / function expressions: extract as function instead of variable
if (valueNode && (valueNode.type === 'arrow_function' || valueNode.type === 'function_expression')) {
this.extractFunction(valueNode);
continue;
}
// Capture first 100 chars of initializer for context (stored in signature for searchability)
const initValue = valueNode ? getNodeText(valueNode, this.source).slice(0, 100) : undefined;
const initSignature = initValue ? `= ${initValue}${initValue.length >= 100 ? '...' : ''}` : undefined;
const varNode = this.createNode(kind, name, child, {
docstring,
signature: initSignature,
isExported,
});
// Extract type annotation references (e.g., const x: ITextModel = ...)
if (varNode) {
this.extractVariableTypeAnnotation(child, varNode.id);
}
// Exported const object-of-functions — extract each function-valued
// property as a function named by its key + walk its body so its
// calls are captured. Two shapes, both keyed on AST shape (not on any
// library name):
// `export const actions = { default: async () => {} }` — object is
// the DIRECT value (SvelteKit form actions / handler maps / route
// tables).
// `export const useStore = create((set, get) => ({ fetchUser:
// async () => {} }))` — object is RETURNED by an initializer call,
// possibly through middleware wrappers (persist/devtools/immer).
// Covers Zustand/Redux/Pinia/MobX stores generically. Without
// this, store actions exist only as object-literal properties —
// never nodes — so `node`/`callers` on `fetchUser` return "not
// found" and the agent Reads the store to reconstruct the flow.
// Scoped to EXPORTED consts to exclude inline-object noise
// (`ctx.set({...})`) the object-method skip deliberately avoids.
const objectOfFns =
valueNode && (valueNode.type === 'object' || valueNode.type === 'object_expression')
? valueNode
: valueNode?.type === 'call_expression'
? this.findInitializerReturnedObject(valueNode)
: null;
const extractObjectMethods = isExported && !!objectOfFns;
// Visit the initializer body for calls — EXCEPT object literals (their
// function-valued properties are extracted below) and the store-factory
// call whose returned object we extract method-by-method below (walking
// the whole call would re-visit those method arrows and mis-attribute
// their inner calls to the file/module scope).
if (valueNode &&
valueNode.type !== 'object' &&
valueNode.type !== 'object_expression' &&
!(extractObjectMethods && valueNode.type === 'call_expression')) {
this.visitFunctionBody(valueNode, '');
}
if (extractObjectMethods && objectOfFns) {
this.extractObjectLiteralFunctions(objectOfFns);
}
}
}
}
} else if (this.language === 'python' || this.language === 'ruby') {
// Python/Ruby assignment: left = right
const left = getChildByField(node, 'left') || node.namedChild(0);
const right = getChildByField(node, 'right') || node.namedChild(1);
if (left && left.type === 'identifier') {
const name = getNodeText(left, this.source);
// Skip if name starts with lowercase and looks like a function call result
// Python constants are usually UPPER_CASE
const initValue = right ? getNodeText(right, this.source).slice(0, 100) : undefined;
const initSignature = initValue ? `= ${initValue}${initValue.length >= 100 ? '...' : ''}` : undefined;
this.createNode(kind, name, node, {
docstring,
signature: initSignature,
});
}
} else if (this.language === 'go') {
// Go: var_declaration, short_var_declaration, const_declaration
// These can have multiple identifiers on the left
const specs = node.namedChildren.filter(c =>
c.type === 'var_spec' || c.type === 'const_spec'
);
for (const spec of specs) {
const nameNode = spec.namedChild(0);
let varNode: Node | null = null;
if (nameNode && nameNode.type === 'identifier') {
const name = getNodeText(nameNode, this.source);
const valueNode = spec.namedChildCount > 1 ? spec.namedChild(spec.namedChildCount - 1) : null;
const initValue = valueNode ? getNodeText(valueNode, this.source).slice(0, 100) : undefined;
const initSignature = initValue ? `= ${initValue}${initValue.length >= 100 ? '...' : ''}` : undefined;
varNode = this.createNode(node.type === 'const_declaration' ? 'constant' : 'variable', name, spec, {
docstring,
signature: initSignature,
});
}
// Walk the initializer so composite literals and calls in a
// package-level `var Query Binding = queryBinding{}` (a registry of
// implementations) or `var c = pkg.New()` are extracted as
// instantiates/calls dependencies — the body walker only covers
// initializers inside functions, not these top-level declarations.
// Scope the walk to the declared symbol so a call inside an anonymous
// func_literal initializer — a cobra `RunE: func(){…}` handler, a
// goroutine or callback closure — attributes to the var instead of
// leaking to the file node (which reads as "no caller"), issue #693.
const valueField = getChildByField(spec, 'value');
if (valueField) {
if (varNode) this.nodeStack.push(varNode.id);
this.visitFunctionBody(valueField, varNode?.id ?? '');
if (varNode) this.nodeStack.pop();
}
}
// Handle short_var_declaration (:=)
if (node.type === 'short_var_declaration') {
const left = getChildByField(node, 'left');
const right = getChildByField(node, 'right');
if (left) {
// Can be expression_list with multiple identifiers
const identifiers = left.type === 'expression_list'
? left.namedChildren.filter(c => c.type === 'identifier')
: [left];
for (const id of identifiers) {
const name = getNodeText(id, this.source);
const initValue = right ? getNodeText(right, this.source).slice(0, 100) : undefined;
const initSignature = initValue ? `= ${initValue}${initValue.length >= 100 ? '...' : ''}` : undefined;
this.createNode('variable', name, node, {
docstring,
signature: initSignature,
});
}
}
}
} else if (this.language === 'lua' || this.language === 'luau') {
// Lua/Luau: variable_declaration → assignment_statement → variable_list
// (name: identifier...) = expression_list. `local x, y = 1, 2`
// declares multiple names; only plain identifiers are locals.
const assign = node.namedChildren.find((c) => c.type === 'assignment_statement') ?? node;
const varList = assign.namedChildren.find((c) => c.type === 'variable_list');
const exprList = assign.namedChildren.find((c) => c.type === 'expression_list');
const values = exprList ? exprList.namedChildren : [];
const names = varList ? varList.namedChildren.filter((c) => c.type === 'identifier') : [];
names.forEach((nameNode, i) => {
const name = getNodeText(nameNode, this.source);
if (!name) return;
const valueNode = values[i];
const initValue = valueNode ? getNodeText(valueNode, this.source).slice(0, 100) : undefined;
const initSignature = initValue ? `= ${initValue}${initValue.length >= 100 ? '...' : ''}` : undefined;
this.createNode(kind, name, nameNode, { docstring, signature: initSignature, isExported });
});
} else {
// Generic fallback for other languages
// Try to find identifier children
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child?.type === 'identifier' || child?.type === 'variable_declarator') {
const name = child.type === 'identifier'
? getNodeText(child, this.source)
: extractName(child, this.source, this.extractor);
if (name && name !== '<anonymous>') {
this.createNode(kind, name, child, {
docstring,
isExported,
});
}
}
}
}
}
/**
* Extract a type alias (e.g. `export type X = ...` in TypeScript).
* For languages like Go, resolveTypeAliasKind detects when the type_spec
* wraps a struct or interface definition and creates the correct node kind.
* Returns true if children should be skipped (struct/interface handled body visiting).
*/
private extractTypeAlias(node: SyntaxNode): boolean {
if (!this.extractor) return false;
const name = extractName(node, this.source, this.extractor);
if (name === '<anonymous>') return false;
const docstring = getPrecedingDocstring(node, this.source);
const isExported = this.extractor.isExported?.(node, this.source);
// Check if this type alias is actually a struct or interface definition
// (e.g. Go: `type Foo struct { ... }` is a type_spec wrapping struct_type)
const resolvedKind = this.extractor.resolveTypeAliasKind?.(node, this.source);
if (resolvedKind === 'struct') {
const structNode = this.createNode('struct', name, node, { docstring, isExported });
if (!structNode) return true;
// Visit body children for field extraction
this.nodeStack.push(structNode.id);
// Try Go-style 'type' field first, then find inner struct child (C typedef struct)
const typeChild = getChildByField(node, 'type')
|| this.findChildByTypes(node, this.extractor.structTypes);
if (typeChild) {
// Extract struct embedding (e.g. Go: `type DB struct { *Head; Queryable }`)
this.extractInheritance(typeChild, structNode.id);
const body = getChildByField(typeChild, this.extractor.bodyField) || typeChild;
for (let i = 0; i < body.namedChildCount; i++) {
const child = body.namedChild(i);
if (child) this.visitNode(child);
}
}
this.nodeStack.pop();
return true;
}
if (resolvedKind === 'enum') {
const enumNode = this.createNode('enum', name, node, { docstring, isExported });
if (!enumNode) return true;
this.nodeStack.push(enumNode.id);
// Find the inner enum type child (e.g. C: typedef enum { ... } name)
const innerEnum = this.findChildByTypes(node, this.extractor.enumTypes);
if (innerEnum) {
this.extractInheritance(innerEnum, enumNode.id);
const body = this.extractor.resolveBody?.(innerEnum, this.extractor.bodyField)
?? getChildByField(innerEnum, this.extractor.bodyField);
if (body) {
const memberTypes = this.extractor.enumMemberTypes;
for (let i = 0; i < body.namedChildCount; i++) {
const child = body.namedChild(i);
if (!child) continue;
if (memberTypes?.includes(child.type)) {
this.extractEnumMembers(child);
} else {
this.visitNode(child);
}
}
}
}
this.nodeStack.pop();
return true;
}
if (resolvedKind === 'interface') {
const kind: NodeKind = this.extractor.interfaceKind ?? 'interface';
const interfaceNode = this.createNode(kind, name, node, { docstring, isExported });
if (!interfaceNode) return true;
// Extract interface inheritance from the inner type node
const typeChild = getChildByField(node, 'type');
if (typeChild) this.extractInheritance(typeChild, interfaceNode.id);
// Go: extract the interface's method specs as `method` nodes so implicit
// interface satisfaction (a struct's method set ⊇ the interface's) and
// impl-navigation can see the contract. Go has no `implements` keyword, so
// without the interface's method set there's nothing to match against.
if (this.language === 'go' && typeChild) {
this.extractGoInterfaceMethods(typeChild, interfaceNode.id);
}
return true;
}
const typeAliasNode = this.createNode('type_alias', name, node, {
docstring,
isExported,
});
// Extract type references from the alias value (e.g., `type X = ITextModel | null`)
if (typeAliasNode && this.TYPE_ANNOTATION_LANGUAGES.has(this.language)) {
// The value is everything after the `=`, which is typically the last named child
// In tree-sitter TS: type_alias_declaration has name + value children
const value = getChildByField(node, 'value');
if (value) {
this.extractTypeRefsFromSubtree(value, typeAliasNode.id);
// `type X = { foo: T; bar(): T }` — make the members first-class
// property/method nodes under the type alias so `recorder.stop()`
// can attach the call edge to `RecorderHandle.stop` instead of
// an unrelated class method picked by path-proximity (#359).
if (this.language === 'typescript' || this.language === 'tsx') {
this.extractTsTypeAliasMembers(value, typeAliasNode);
// `type List = [ Service<'name', Req, Resp>, … ]` — surface each
// entry's string-literal name as a searchable member (issue #634).
this.extractTsTupleContractNames(value, typeAliasNode);
}
}
}
return false;
}
/**
* Extract the method specs of a Go `interface_type` body as `method` nodes
* contained by the interface (e.g. `Marshal`, `Unmarshal` of a `Core`
* interface). tree-sitter-go names these `method_elem` (newer) or
* `method_spec` (older). Embedded interfaces (`Reader` inside `ReadWriter`)
* are `type_identifier`s, not methods, and are left to inheritance extraction.
*/
private extractGoInterfaceMethods(interfaceType: SyntaxNode, ifaceId: string): void {
this.nodeStack.push(ifaceId);
for (let i = 0; i < interfaceType.namedChildCount; i++) {
const m = interfaceType.namedChild(i);
if (!m || (m.type !== 'method_elem' && m.type !== 'method_spec')) continue;
const nameNode = getChildByField(m, 'name') ?? m.namedChild(0);
if (!nameNode) continue;
const mname = getNodeText(nameNode, this.source);
if (mname) {
this.createNode('method', mname, m, {
signature: this.extractor?.getSignature?.(m, this.source),
});
}
}
this.nodeStack.pop();
}
/**
* Surface the members of a TypeScript `type X = { ... }` (or intersection
* thereof) as `property` / `method` nodes under the type-alias node. Only
* walks the immediate object_type / intersection operands so anonymous
* nested object types inside generic arguments (`Promise<{ ok: true }>`)
* don't produce phantom members.
*/
private extractTsTypeAliasMembers(value: SyntaxNode, typeAliasNode: Node): void {
const objectTypes: SyntaxNode[] = [];
if (value.type === 'object_type') {
objectTypes.push(value);
} else if (value.type === 'intersection_type') {
for (let i = 0; i < value.namedChildCount; i++) {
const op = value.namedChild(i);
if (op && op.type === 'object_type') objectTypes.push(op);
}
} else {
return;
}
this.nodeStack.push(typeAliasNode.id);
for (const objType of objectTypes) {
for (let i = 0; i < objType.namedChildCount; i++) {
const child = objType.namedChild(i);
if (!child) continue;
if (child.type !== 'property_signature' && child.type !== 'method_signature') continue;
const nameNode = getChildByField(child, 'name');
const memberName = nameNode ? getNodeText(nameNode, this.source) : '';
if (!memberName) continue;
// `foo: () => T` and `foo(): T` are functionally a method on the
// type contract. Treat the property_signature with a function-typed
// annotation as a method too so call sites can resolve to it.
const memberKind: NodeKind = child.type === 'method_signature'
? 'method'
: this.isTsFunctionTypedProperty(child) ? 'method' : 'property';
const docstring = getPrecedingDocstring(child, this.source);
const signature = getNodeText(child, this.source);
this.createNode(memberKind, memberName, child, {
docstring,
signature,
qualifiedName: `${typeAliasNode.name}::${memberName}`,
});
// Emit `references` edges from the type alias to types named in the
// member's signature, matching the interface-member behavior added in
// #432. We attach refs to the type-alias parent (consistent with
// interface property_signature treatment).
this.extractTypeAnnotations(child, typeAliasNode.id);
}
}
this.nodeStack.pop();
}
/**
* Surface the string-literal "names" of a TypeScript service/contract
* registry written as a tuple of generic instantiations:
*
* type MyServiceList = [
* Service<'query_apply_record', Req, Resp>,
* Service<'apply_confirm', Req, Resp>,
* ];
*
* Each `Service<'name', …>` tags an entry with a string-literal name that a
* dynamic factory (`createService<MyServiceList>()`) turns into a callable
* property (`api.query_apply_record(…)`). Static extraction otherwise never
* sees that name — it's a type argument, not a declaration — so
* `codegraph query query_apply_record` returned nothing (issue #634). We emit
* each name as a `method` node under the type alias (qualifiedName
* `MyServiceList::query_apply_record`) so it's searchable and resolvable as a
* symbol. (A call through the proxy, `api.query_apply_record(…)`, still
* resolves to the imported `api` binding — the receiver's type isn't known —
* so this fixes discoverability, not the per-method call edge.)
*
* Scope is deliberately narrow to avoid noise: only a string literal that is
* a DIRECT type argument of a `generic_type` that is itself a DIRECT element
* of a `tuple_type`. This excludes utility types (`Pick`/`Omit`/`Record` are
* never written as tuples) and string args nested deeper
* (`Service<'a', Pick<U, 'id'>>` yields only `a`, never `id`). Names must be
* valid identifiers, which also rules out route paths / arbitrary strings.
*/
private extractTsTupleContractNames(value: SyntaxNode, typeAliasNode: Node): void {
const tuples: SyntaxNode[] = [];
const collectTuples = (n: SyntaxNode, depth: number): void => {
if (depth > 6) return; // a type expression is shallow; cap defensively
if (n.type === 'tuple_type') tuples.push(n);
for (let i = 0; i < n.namedChildCount; i++) {
const c = n.namedChild(i);
if (c) collectTuples(c, depth + 1);
}
};
collectTuples(value, 0);
if (tuples.length === 0) return;
this.nodeStack.push(typeAliasNode.id);
for (const tuple of tuples) {
for (let i = 0; i < tuple.namedChildCount; i++) {
const entry = tuple.namedChild(i);
if (!entry || entry.type !== 'generic_type') continue;
const typeArgs = getChildByField(entry, 'type_arguments');
if (!typeArgs) continue;
for (let j = 0; j < typeArgs.namedChildCount; j++) {
const arg = typeArgs.namedChild(j);
if (!arg || arg.type !== 'literal_type') continue;
// literal_type wraps the actual literal; only a string is a name.
const strNode = arg.namedChild(0);
if (!strNode || strNode.type !== 'string') continue;
const name = getNodeText(strNode, this.source)
.trim()
.replace(/^['"`]/, '')
.replace(/['"`]$/, '');
if (!/^[A-Za-z_$][A-Za-z0-9_$]*$/.test(name)) continue;
const signature = getNodeText(entry, this.source).replace(/\s+/g, ' ').trim().slice(0, 120);
this.createNode('method', name, entry, {
signature,
qualifiedName: `${typeAliasNode.name}::${name}`,
});
}
}
}
this.nodeStack.pop();
}
/**
* `foo: () => T` → property_signature whose type_annotation contains a
* `function_type`. Treat that as a method-shaped contract member, since
* the call site `obj.foo()` has identical semantics to `bar(): T`.
*/
private isTsFunctionTypedProperty(propertySignature: SyntaxNode): boolean {
const typeAnno = getChildByField(propertySignature, 'type');
if (!typeAnno) return false;
for (let i = 0; i < typeAnno.namedChildCount; i++) {
const inner = typeAnno.namedChild(i);
if (inner && inner.type === 'function_type') return true;
}
return false;
}
// extractExportedVariables removed — the walker now descends into
// export_statement children and the inner declaration's dedicated
// extractor (extractVariable, extractFunction, extractClass, etc.)
// handles the symbol with isExported=true via parent-walk in the
// language extractor's isExported predicate.
/**
* Extract an import
*
* Creates an import node with the full import statement stored in signature for searchability.
* Also creates unresolved references for resolution purposes.
*/
private extractImport(node: SyntaxNode): void {
if (!this.extractor) return;
const importText = getNodeText(node, this.source).trim();
// Try language-specific hook first
if (this.extractor.extractImport) {
const info = this.extractor.extractImport(node, this.source);
if (info) {
this.createNode('import', info.moduleName, node, {
signature: info.signature,
});
// Create unresolved reference unless the hook handled it
if (!info.handledRefs && info.moduleName && this.nodeStack.length > 0) {
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) {
this.unresolvedReferences.push({
fromNodeId: parentId,
referenceName: info.moduleName,
referenceKind: 'imports',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
}
// Link each imported binding to its definition so imported-but-not-
// called/typed symbols still record a cross-file dependency (TS/JS only).
if (
this.language === 'typescript' || this.language === 'tsx' ||
this.language === 'javascript' || this.language === 'jsx'
) {
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) this.emitImportBindingRefs(node, parentId);
}
// Python `from module import X, Y` — link each imported name to its
// definition (covers `__init__.py` re-export barrels, which are just
// `from .sub import X`). Same recall gap as TS: a name imported and
// used in a non-call position created no dependency edge.
if (this.language === 'python' && node.type === 'import_from_statement') {
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) this.emitPyFromImportRefs(node, parentId);
}
// Rust `use crate::m::Item;` / `pub use self::sub::Item;` — link each
// imported leaf to its definition. Covers `pub use` re-export hubs
// (a `mod.rs` re-exporting submodule items, e.g. tokio's `fs/mod.rs`)
// and items imported but used in non-call/non-type positions.
if (this.language === 'rust' && node.type === 'use_declaration') {
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) this.emitRustUseBindingRefs(node, parentId);
}
// PHP `use Foo\Bar\Baz;` — link to the namespace-qualified definition so
// an imported-but-DI-injected contract (Laravel's pattern) records a
// cross-file dependency. Grouped imports are handled in their own branch.
if (this.language === 'php' && node.type === 'namespace_use_declaration') {
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) this.emitPhpUseRefs(node, parentId);
}
// Ruby `require "lib/foo"` / `require_relative "../foo"` — resolve to the
// required FILE so a file pulled in only by `require` (config-loaded
// components, gems that don't autoload) records a cross-file dependency.
if (this.language === 'ruby' && node.type === 'call') {
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) this.emitRubyRequireRefs(node, parentId);
}
return;
}
// Hook returned null — fall through to multi-import inline handlers only
// (hook returning null means "I didn't handle this" for multi-import cases,
// NOT "use generic fallback" — the hook already declined)
}
// Multi-import cases that create multiple nodes (can't be expressed with single-return hook)
// Python import_statement: import os, sys (creates one import per module)
if (this.language === 'python' && node.type === 'import_statement') {
const importParentId = this.nodeStack[this.nodeStack.length - 1];
// A bare `import a.b.c` of an internal module (the standard Django
// `AppConfig.ready(): import myapp.signals` registration pattern, and any
// `import pkg.mod` used for its side effects) had no edge to the module
// file — only `from x import y` was linked. Push an `imports` ref (like
// Go) so the resolver maps the dotted path to its file. Stdlib/external
// modules naturally don't resolve (no `os.py` file node in the repo).
const pushModuleRef = (dotted: SyntaxNode): void => {
if (!importParentId) return;
this.unresolvedReferences.push({
fromNodeId: importParentId,
referenceName: getNodeText(dotted, this.source),
referenceKind: 'imports',
line: dotted.startPosition.row + 1,
column: dotted.startPosition.column,
});
};
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child?.type === 'dotted_name') {
this.createNode('import', getNodeText(child, this.source), node, {
signature: importText,
});
pushModuleRef(child);
} else if (child?.type === 'aliased_import') {
const dottedName = child.namedChildren.find(c => c.type === 'dotted_name');
if (dottedName) {
this.createNode('import', getNodeText(dottedName, this.source), node, {
signature: importText,
});
pushModuleRef(dottedName);
}
}
}
return;
}
// Go imports: single or grouped (creates one import per spec)
if (this.language === 'go') {
const parentId = this.nodeStack.length > 0 ? this.nodeStack[this.nodeStack.length - 1] : null;
const extractFromSpec = (spec: SyntaxNode): void => {
const stringLiteral = spec.namedChildren.find(c => c.type === 'interpreted_string_literal');
if (stringLiteral) {
const importPath = getNodeText(stringLiteral, this.source).replace(/['"]/g, '');
if (importPath) {
this.createNode('import', importPath, spec, {
signature: getNodeText(spec, this.source).trim(),
});
// Create unresolved reference so the resolver can create imports edges
if (parentId) {
this.unresolvedReferences.push({
fromNodeId: parentId,
referenceName: importPath,
referenceKind: 'imports',
line: spec.startPosition.row + 1,
column: spec.startPosition.column,
});
}
}
}
};
const importSpecList = node.namedChildren.find(c => c.type === 'import_spec_list');
if (importSpecList) {
for (const spec of importSpecList.namedChildren.filter(c => c.type === 'import_spec')) {
extractFromSpec(spec);
}
} else {
const importSpec = node.namedChildren.find(c => c.type === 'import_spec');
if (importSpec) {
extractFromSpec(importSpec);
}
}
return;
}
// PHP grouped imports: use X\{A, B} (creates one import per item)
if (this.language === 'php') {
const namespacePrefix = node.namedChildren.find(c => c.type === 'namespace_name');
const useGroup = node.namedChildren.find(c => c.type === 'namespace_use_group');
if (namespacePrefix && useGroup) {
const prefix = getNodeText(namespacePrefix, this.source);
const useClauses = useGroup.namedChildren.filter((c: SyntaxNode) =>
c.type === 'namespace_use_group_clause' || c.type === 'namespace_use_clause'
);
for (const clause of useClauses) {
const nsName = clause.namedChildren.find((c: SyntaxNode) => c.type === 'namespace_name');
const name = nsName
? nsName.namedChildren.find((c: SyntaxNode) => c.type === 'name')
: clause.namedChildren.find((c: SyntaxNode) => c.type === 'name');
if (name) {
const fullPath = `${prefix}\\${getNodeText(name, this.source)}`;
this.createNode('import', fullPath, node, {
signature: importText,
});
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) this.pushPhpUseRef(fullPath, parentId, node);
}
}
return;
}
}
// If a hook exists but returned null, it intentionally declined this node — don't create fallback
if (this.extractor.extractImport) return;
// Generic fallback for languages without hooks
this.createNode('import', importText, node, {
signature: importText,
});
}
/**
* Emit one `imports` reference per named/default import binding (TS/JS family),
* attributed to the file node — so the resolver links each imported symbol to
* the file that DEFINES it.
*
* Importing a symbol IS a dependency, but extraction only emits references for
* calls, instantiations, type annotations, and inheritance. A symbol that's
* imported and then only re-exported (`export { X } from './x'`), placed in a
* registry array (`[expressResolver, …]`), passed as an argument, or used in
* JSX produced NO cross-file edge at all — so the providing file showed a
* false "0 dependents" and was invisible to blast-radius / `affected`. The
* resolver maps the local name (alias-aware) to the provider's definition and
* creates a cross-file `imports` edge; `getFileDependents` picks it up, while
* `getImpactRadius` keeps it as a bounded leaf (the importing file node).
*
* Namespace imports (`import * as NS`) bind a whole module: `NS.member` calls
* resolve on their own, but a namespace used ONLY via a value-member read
* (`NS.SOME_CONST`) would leave no edge — so we also emit the namespace local
* name, which the resolver links to the module FILE as a dependency backstop.
*/
private emitImportBindingRefs(node: SyntaxNode, fromNodeId: string): void {
const clause = node.namedChildren.find((c) => c.type === 'import_clause');
if (!clause) return; // side-effect import (`import './x'`) — no bindings
const pushRef = (nameNode: SyntaxNode | null | undefined): void => {
if (!nameNode) return;
const name = getNodeText(nameNode, this.source);
if (!name) return;
this.unresolvedReferences.push({
fromNodeId,
referenceName: name,
referenceKind: 'imports',
line: nameNode.startPosition.row + 1,
column: nameNode.startPosition.column,
});
};
for (const child of clause.namedChildren) {
if (child.type === 'identifier') {
// default import: `import Foo from './x'`
pushRef(child);
} else if (child.type === 'named_imports') {
// `import { A, B as C } from './x'` — link the LOCAL name (alias if any)
for (const spec of child.namedChildren) {
if (spec.type !== 'import_specifier') continue;
pushRef(getChildByField(spec, 'alias') ?? getChildByField(spec, 'name') ?? spec.namedChild(0));
}
} else if (child.type === 'namespace_import') {
// `import * as NS from './x'` — emit NS so the module-import backstop can
// record the file dependency even if NS is only used by value-member read.
pushRef(child.namedChildren.find((c) => c.type === 'identifier') ?? child.namedChild(0));
}
}
}
/**
* Emit one `imports` reference per re-exported binding of a
* `export { A, B as C } from './y'` statement, attributed to the file node —
* so a barrel that re-exports from another module records a dependency on it.
*
* Links the SOURCE-side name (`A`, the `name` field — not the local alias
* `C`), since that is what the source module defines. `export * from './y'`
* has no named bindings to attribute and `export { default as X }` can't be
* name-matched, so both are skipped.
*/
private emitReExportRefs(node: SyntaxNode, fromNodeId: string): void {
const clause = node.namedChildren.find((c) => c.type === 'export_clause');
if (!clause) return; // `export * from './y'` — no named bindings
for (const spec of clause.namedChildren) {
if (spec.type !== 'export_specifier') continue;
const nameNode = getChildByField(spec, 'name') ?? spec.namedChild(0);
if (!nameNode) continue;
const name = getNodeText(nameNode, this.source);
if (!name || name === 'default') continue;
this.unresolvedReferences.push({
fromNodeId,
referenceName: name,
referenceKind: 'imports',
line: nameNode.startPosition.row + 1,
column: nameNode.startPosition.column,
});
}
}
/**
* Emit one `imports` reference per binding of a Rust `use` declaration —
* `use crate::m::Item`, `use crate::m::{A, B as C}`, `pub use self::sub::Item`.
* Emits the FULL path (e.g. `self::sub::Item`, not just `Item`) so the resolver
* can resolve the module prefix to a file and find the leaf symbol there —
* disambiguating common-name re-exports (`pub use self::read::read`, where the
* leaf `read` collides with many same-named symbols). Falls back to name-match
* on the leaf when the path can't be resolved. `use ...::*` has no leaf binding.
*/
private emitRustUseBindingRefs(node: SyntaxNode, fromNodeId: string): void {
const paths: { text: string; node: SyntaxNode }[] = [];
const join = (prefix: string, seg: string): string => (prefix ? `${prefix}::${seg}` : seg);
const collect = (n: SyntaxNode, prefix: string): void => {
switch (n.type) {
case 'identifier':
paths.push({ text: join(prefix, getNodeText(n, this.source)), node: n });
break;
case 'scoped_identifier': {
// Full scoped path (`a::b::C`); combine with any outer group prefix.
const full = getNodeText(n, this.source).trim();
paths.push({ text: prefix ? `${prefix}::${full}` : full, node: n });
break;
}
case 'scoped_use_list': {
// `path::{ ... }` — the group's path becomes the prefix for each item.
const pathNode = getChildByField(n, 'path');
const seg = pathNode ? getNodeText(pathNode, this.source).trim() : '';
const newPrefix = seg ? join(prefix, seg) : prefix;
const list = getChildByField(n, 'list') ?? n.namedChildren.find((c) => c.type === 'use_list');
if (list) collect(list, newPrefix);
break;
}
case 'use_list':
for (let i = 0; i < n.namedChildCount; i++) {
const c = n.namedChild(i);
if (c) collect(c, prefix);
}
break;
case 'use_as_clause': {
// `Path as Alias` → link the source path (the definition), not the alias.
const p = getChildByField(n, 'path') ?? n.namedChild(0);
if (p) collect(p, prefix);
break;
}
// use_wildcard → no specific binding to link.
}
};
for (let i = 0; i < node.namedChildCount; i++) {
const c = node.namedChild(i);
if (c) collect(c, '');
}
for (const p of paths) {
// The leaf must be a real name (skip a path that is only `self`/`super`/`crate`).
const leaf = p.text.split('::').pop();
if (!leaf || leaf === 'self' || leaf === 'super' || leaf === 'crate' || leaf === '*') continue;
this.unresolvedReferences.push({
fromNodeId,
referenceName: p.text,
referenceKind: 'imports',
line: p.node.startPosition.row + 1,
column: p.node.startPosition.column,
});
}
}
/**
* Emit an `imports` reference for a single PHP `use Foo\Bar\Baz;` (grouped
* imports `use Foo\{A, B}` are handled where their per-item nodes are created).
* The reference targets the namespace-qualified `Foo\Bar::Baz` form classes are
* stored under (see the PHP `namespace` capture), so it resolves to the RIGHT
* definition — Laravel has many same-named contracts (`Factory`, `Dispatcher`,
* `Guard`) across namespaces that a bare-name match can't disambiguate.
*/
private emitPhpUseRefs(node: SyntaxNode, fromNodeId: string): void {
const clause = node.namedChildren.find((c: SyntaxNode) => c.type === 'namespace_use_clause');
if (!clause) return;
const qn = clause.namedChildren.find((c: SyntaxNode) => c.type === 'qualified_name')
?? clause.namedChildren.find((c: SyntaxNode) => c.type === 'name');
if (qn) this.pushPhpUseRef(getNodeText(qn, this.source), fromNodeId, node);
}
/**
* Ruby `require`/`require_relative` → an `imports` ref to the required FILE.
* `require "sidekiq/fetch"` is load-path-relative (matched by file-path suffix
* via {@link matchByFilePath}); `require_relative "../foo"` is resolved against
* this file's directory. Bare gem/stdlib requires (`require "json"`, no slash)
* are skipped — they're external. The path form (a `/` + `.rb`) makes the ref
* resolve to the file node, so a file pulled in only by `require` — not by a
* resolved constant/call — still records a cross-file dependency.
*/
private emitRubyRequireRefs(node: SyntaxNode, fromNodeId: string): void {
const method = node.namedChildren.find((c: SyntaxNode) => c.type === 'identifier');
const mname = method ? getNodeText(method, this.source) : '';
if (mname !== 'require' && mname !== 'require_relative') return;
const argList = node.namedChildren.find((c: SyntaxNode) => c.type === 'argument_list');
const str = argList?.namedChildren.find((c: SyntaxNode) => c.type === 'string');
const content = str?.namedChildren.find((c: SyntaxNode) => c.type === 'string_content');
if (!content) return;
const req = getNodeText(content, this.source).trim();
if (!req) return;
let refPath: string;
if (mname === 'require_relative') {
const slash = this.filePath.lastIndexOf('/');
const dir = slash >= 0 ? this.filePath.slice(0, slash) : '';
refPath = path.posix.normalize(dir ? `${dir}/${req}` : req);
} else {
refPath = req; // load-path require — suffix-matched against the file path
}
if (!refPath.includes('/')) return; // bare gem/stdlib require — external
if (!refPath.endsWith('.rb')) refPath += '.rb';
this.unresolvedReferences.push({
fromNodeId,
referenceName: refPath,
referenceKind: 'imports',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
/** Convert a PHP FQN `Foo\Bar\Baz` to the stored `Foo\Bar::Baz` and emit an `imports` ref. */
private pushPhpUseRef(fqn: string, fromNodeId: string, node: SyntaxNode): void {
const clean = fqn.replace(/^\\/, '');
const lastSep = clean.lastIndexOf('\\');
if (lastSep < 0) return; // global-namespace class — already matches by simple name
this.unresolvedReferences.push({
fromNodeId,
referenceName: `${clean.slice(0, lastSep)}::${clean.slice(lastSep + 1)}`,
referenceKind: 'imports',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
/**
* Emit one `imports` reference per name imported in a Python
* `from module import A, B as C` statement, attributed to the file node — so
* the resolver links each imported name to the module that DEFINES it.
*
* Same recall gap as TS: extraction only emitted references for calls,
* instantiations, and inheritance, so a name imported and then used in a
* non-call position (a list/dict literal, a default argument, a decorator
* target, or simply re-exported through an `__init__.py` barrel) produced no
* cross-file edge — the providing module showed a false "0 dependents". Links
* the LOCAL name (alias when present, since that's what the resolver's import
* mapping keys on); `from module import *` has no names to attribute.
*/
private emitPyFromImportRefs(node: SyntaxNode, fromNodeId: string): void {
const moduleNameNode = getChildByField(node, 'module_name');
for (const child of node.namedChildren) {
// Skip the `from <module>` part itself and `import *`.
if (moduleNameNode &&
child.startIndex === moduleNameNode.startIndex &&
child.endIndex === moduleNameNode.endIndex) continue;
if (child.type === 'wildcard_import') continue;
let nameNode: SyntaxNode | null | undefined = null;
if (child.type === 'aliased_import') {
nameNode = getChildByField(child, 'alias') ?? getChildByField(child, 'name') ?? child.namedChild(0);
} else if (child.type === 'dotted_name') {
nameNode = child;
}
if (!nameNode) continue;
const raw = getNodeText(nameNode, this.source);
// Imported names are simple identifiers; defensively take the last segment.
const local = raw.includes('.') ? raw.split('.').pop()! : raw;
if (!local) continue;
this.unresolvedReferences.push({
fromNodeId,
referenceName: local,
referenceKind: 'imports',
line: nameNode.startPosition.row + 1,
column: nameNode.startPosition.column,
});
}
}
/**
* Extract a function call
*/
private extractCall(node: SyntaxNode): void {
if (this.nodeStack.length === 0) return;
const callerId = this.nodeStack[this.nodeStack.length - 1];
if (!callerId) return;
// Get the function/method being called
let calleeName = '';
// Java/Kotlin method_invocation has 'object' + 'name' fields instead of 'function'
// PHP member_call_expression has 'object' + 'name', scoped_call_expression has 'scope' + 'name'
const nameField = getChildByField(node, 'name');
const objectField = getChildByField(node, 'object') || getChildByField(node, 'scope');
if (nameField && objectField && (node.type === 'method_invocation' || node.type === 'member_call_expression' || node.type === 'scoped_call_expression')) {
// Method call with explicit receiver: receiver.method() / $receiver->method() / ClassName::method()
const methodName = getNodeText(nameField, this.source);
// Java `this.userbo.toLogin2()` parses as method_invocation(object=field_access(this, userbo)).
// Without unwrapping, receiverName is `this.userbo` and the name-matcher's
// single-dot receiver regex fails. Pull out the immediate field after `this.`
// so the receiver is the field name (`userbo`), which the resolver can then
// look up in the enclosing class's field declarations.
// PHP static-factory fluent chain: `Cls::for($x)->method()` — the receiver
// is itself a static call, so resolution must infer the method's class
// from what `Cls::for` RETURNS (its `: self` / `: static` / `: Type`),
// #608 (mirrors the C++ chain fix in #645). Encode `<Cls::factory>().<method>`;
// the `().` marker lets the PHP resolver split it. The receiver text
// (`Cls::for('x')`) carries the args, so without this it degrades to an
// unresolvable string and the call edge is dropped.
if (methodName && this.language === 'php' && objectField.type === 'scoped_call_expression') {
const innerScope = getChildByField(objectField, 'scope');
const innerName = getChildByField(objectField, 'name');
if (innerScope && innerName) {
calleeName = `${getNodeText(innerScope, this.source)}::${getNodeText(innerName, this.source)}().${methodName}`;
} else {
calleeName = methodName;
}
if (calleeName) {
this.unresolvedReferences.push({
fromNodeId: callerId,
referenceName: calleeName,
referenceKind: 'calls',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
return;
}
// Java static-factory / fluent chain: `Foo.getInstance().bar()` — the
// receiver is itself a method call, so resolution must infer bar's class
// from what `Foo.getInstance` RETURNS (its declared return type), the
// #645/#608 mechanism. Encode `<inner-receiver>.<inner-method>().<method>`;
// the `().` marker lets the Java chain resolver split it, and normalizing to
// empty parens drops any factory args (`Foo.create(cfg).bar()`) that would
// otherwise leave a `(cfg)` in the receiver text and break the split.
if (
methodName &&
this.language === 'java' &&
objectField.type === 'method_invocation'
) {
const innerObj = getChildByField(objectField, 'object');
const innerName = getChildByField(objectField, 'name');
if (innerObj && innerName) {
calleeName = `${getNodeText(innerObj, this.source)}.${getNodeText(innerName, this.source)}().${methodName}`;
this.unresolvedReferences.push({
fromNodeId: callerId,
referenceName: calleeName,
referenceKind: 'calls',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
return;
}
}
let receiverName: string;
if (objectField.type === 'field_access') {
const inner = getChildByField(objectField, 'object');
const fld = getChildByField(objectField, 'field');
if (inner && fld && (inner.type === 'this' || inner.type === 'this_expression')) {
receiverName = getNodeText(fld, this.source);
} else {
receiverName = getNodeText(objectField, this.source);
}
} else {
receiverName = getNodeText(objectField, this.source);
}
// Strip PHP $ prefix from variable names
receiverName = receiverName.replace(/^\$/, '');
if (methodName) {
// Skip self/this/parent/static receivers — they don't aid resolution
const SKIP_RECEIVERS = new Set(['self', 'this', 'cls', 'super', 'parent', 'static']);
if (SKIP_RECEIVERS.has(receiverName)) {
calleeName = methodName;
} else {
calleeName = `${receiverName}.${methodName}`;
}
}
} else if (node.type === 'message_expression') {
// ObjC message expressions emit one `method` field child per selector
// keyword: `[obj a:1 b:2 c:3]` has three `method=identifier` siblings.
// Joining them with `:` reconstructs the full selector and matches the
// multi-part selector names produced by the ObjC method_definition
// extractor (`extractObjcMethodName` in languages/objc.ts). Without this
// join, multi-keyword call sites only emitted the first keyword and never
// resolved to their target methods (e.g. `GET:parameters:headers:...` had
// zero callers despite obviously being called).
const methodKeywords: string[] = [];
for (let i = 0; i < node.namedChildCount; i++) {
if (node.fieldNameForNamedChild(i) === 'method') {
const kw = node.namedChild(i);
if (kw) methodKeywords.push(getNodeText(kw, this.source));
}
}
if (methodKeywords.length > 0) {
// A selector keyword takes a `:` when it has an argument. A SINGLE
// keyword can be unary (`[c reset]` → `reset`) OR take one argument
// (`[c storeImage:k]` → `storeImage:`) — distinguished by whether the
// message has a `:` token. Without this, every single-argument message
// (the most common form: `addObject:`, `storeImage:`, …) was named
// without the colon and never matched its `storeImage:` method.
let hasColon = false;
for (let i = 0; i < node.childCount; i++) {
if (node.child(i)?.type === ':') { hasColon = true; break; }
}
const methodName: string = hasColon
? methodKeywords.map((k) => `${k}:`).join('')
: (methodKeywords[0] as string);
const receiverField = getChildByField(node, 'receiver');
const SKIP_RECEIVERS = new Set(['self', 'super']);
if (receiverField && receiverField.type !== 'message_expression') {
const receiverName = getNodeText(receiverField, this.source);
if (receiverName && !SKIP_RECEIVERS.has(receiverName)) {
calleeName = `${receiverName}.${methodName}`;
// A CLASS-message receiver (`[SDImageCache alloc]`,
// `[SDImageCache sharedCache]`) is a capitalized class name. The
// call resolves the method (`alloc`/`sharedCache`), but the CLASS
// itself — whose @interface lives in the header — would otherwise
// never be referenced. Emit a `references` edge to it so a class
// used only via class messages (alloc/init, singletons, factories)
// and its header record a dependent.
if (/^[A-Z][A-Za-z0-9_]*$/.test(receiverName)) {
this.unresolvedReferences.push({
fromNodeId: callerId,
referenceName: receiverName,
referenceKind: 'references',
line: receiverField.startPosition.row + 1,
column: receiverField.startPosition.column,
});
}
} else {
calleeName = methodName;
}
} else {
calleeName = methodName;
}
}
} else {
const func = getChildByField(node, 'function') || node.namedChild(0);
if (func) {
if (func.type === 'member_expression' || func.type === 'attribute' || func.type === 'selector_expression' || func.type === 'navigation_expression' || func.type === 'field_expression') {
// Method call: obj.method() or obj.field.method()
// Go uses selector_expression with 'field', JS/TS uses member_expression with 'property'
// Kotlin uses navigation_expression with navigation_suffix > simple_identifier
// C/C++ use field_expression for both `obj.method()` and `ptr->method()`
let property = getChildByField(func, 'property') || getChildByField(func, 'field');
if (!property) {
const child1 = func.namedChild(1);
// Kotlin: navigation_suffix wraps the method name — extract simple_identifier from it
if (child1?.type === 'navigation_suffix') {
property = child1.namedChildren.find((c: SyntaxNode) => c.type === 'simple_identifier') ?? child1;
} else {
property = child1;
}
}
if (property) {
const methodName = getNodeText(property, this.source);
// Include receiver name for qualified resolution (e.g., console.print → "console.print")
// This helps the resolver distinguish method calls from bare function calls
// (e.g., Python's console.print() vs builtin print())
// Skip self/this/cls as they don't aid resolution
const receiver =
getChildByField(func, 'object') ||
getChildByField(func, 'operand') ||
getChildByField(func, 'argument') ||
func.namedChild(0);
const SKIP_RECEIVERS = new Set(['self', 'this', 'cls', 'super']);
if (receiver && (receiver.type === 'identifier' || receiver.type === 'simple_identifier' || receiver.type === 'field_identifier')) {
const receiverName = getNodeText(receiver, this.source);
if (!SKIP_RECEIVERS.has(receiverName)) {
calleeName = `${receiverName}.${methodName}`;
} else {
calleeName = methodName;
}
} else if (
(this.language === 'cpp' ||
this.language === 'c' ||
this.language === 'kotlin' ||
this.language === 'swift' ||
this.language === 'rust' ||
this.language === 'go') &&
receiver &&
receiver.type === 'call_expression'
) {
// Receiver that is itself a call — `Foo::instance().bar()`,
// `openSession()->run()`, `mgr.view().render()` (C/C++),
// `Foo.getInstance().bar()` (Kotlin) / `Foo.make().draw()` (Swift),
// `Foo::new().bar()` (Rust), or `New().Method()` (Go). Keep the inner
// call so resolution can infer bar()'s class from what the inner call
// RETURNS (#645/#608). Encode as `<innerCallee>().<method>`; the `().`
// marker never appears in an ordinary ref, so the resolver can detect
// and split it. Other languages keep the bare-name behavior below.
let innerCallee: string;
let reencode: boolean;
if (this.language === 'kotlin' || this.language === 'swift') {
// tree-sitter-kotlin/swift expose the inner callee as the
// call_expression's first named child (a navigation_expression
// `Foo.getInstance`, or a bare identifier for a free/constructor call).
const innerNav = receiver.namedChild(0);
innerCallee = innerNav ? getNodeText(innerNav, this.source).replace(/\s+/g, '') : '';
// Only re-encode a CLASS / companion-factory / constructor chain,
// whose receiver chain starts with a capitalized type
// (`Foo.getInstance().bar()`, `Foo().bar()`). An instance chain
// (`list.filter{}.map{}`) has a lowercase receiver whose type we
// can't recover here — re-encoding it would only drop the edge (no
// chain resolution, no bare-name fallback), regressing recall in
// fluent codebases. Leave those to the bare-name path.
reencode = /^[A-Z]/.test(innerCallee);
} else {
const innerFn = getChildByField(receiver, 'function');
innerCallee = innerFn
? getNodeText(innerFn, this.source).replace(/->/g, '.').replace(/\s+/g, '')
: '';
// Rust: only re-encode an associated-function chain
// (`Foo::new().bar()`), whose inner callee is a path/`scoped_identifier`.
// Go: only a bare package-level factory chain (`New().Method()`),
// whose inner callee is an `identifier`. An instance chain
// (`x.foo().bar()` Rust, `obj.Method().Other()` Go) keeps bare-name —
// the resolver can't recover a variable's type, so re-encoding would
// only drop the edge. C/C++ re-encode any inner.
if (this.language === 'rust') reencode = innerFn?.type === 'scoped_identifier';
else if (this.language === 'go') reencode = innerFn?.type === 'identifier';
else reencode = !!innerCallee;
}
calleeName = reencode ? `${innerCallee}().${methodName}` : methodName;
} else {
calleeName = methodName;
}
}
} else if (func.type === 'scoped_identifier' || func.type === 'scoped_call_expression') {
// Scoped call: Module::function()
calleeName = getNodeText(func, this.source);
} else if (this.language === 'csharp' && func.type === 'member_access_expression') {
// C# member call `recv.Method(...)`. When the receiver is itself a call
// — a chained factory `Foo.Create(args).Bar()` — encode `inner().Bar`
// with normalized empty parens so resolution can infer Bar's class from
// what `Foo.Create` RETURNS (#645/#608). A non-call receiver keeps the
// full member-access text (the existing `recv.Method` behavior).
const recv = getChildByField(func, 'expression');
const nameNode = getChildByField(func, 'name');
const methodName = nameNode ? getNodeText(nameNode, this.source) : '';
if (recv && recv.type === 'invocation_expression' && methodName) {
const innerFunc = getChildByField(recv, 'function');
const innerCallee = innerFunc ? getNodeText(innerFunc, this.source).replace(/\s+/g, '') : '';
calleeName = innerCallee ? `${innerCallee}().${methodName}` : methodName;
} else {
calleeName = getNodeText(func, this.source);
}
} else {
calleeName = getNodeText(func, this.source);
}
}
}
// Parenthesized type conversions — Go `(*T)(x)` / `(T)(x)` (and a
// parenthesized callee generally) parse as a call whose "function" is a
// parenthesized type/expression, so the callee text is the un-resolvable
// literal `(*T)`. Normalize to the inner name so it resolves to `T` (a real
// dependency on the converted-to type) instead of dropping on the floor.
if (calleeName) {
const conv = calleeName.match(/^\(\s*\*?\s*([A-Za-z_][\w.]*)\s*\)$/);
if (conv && conv[1]) calleeName = conv[1];
}
if (calleeName) {
this.unresolvedReferences.push({
fromNodeId: callerId,
referenceName: calleeName,
referenceKind: 'calls',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
}
/**
* `new Foo(...)` / `Foo::new(...)` / object_creation_expression —
* emit an `instantiates` reference to the class name. The resolver
* then links it to the class node, producing the `instantiates`
* edge that powers "what creates instances of X" queries.
*
* Children are still walked so nested calls inside the constructor
* arguments (`new Foo(bar())`) get their own `calls` references.
*/
private extractInstantiation(node: SyntaxNode): void {
if (this.nodeStack.length === 0) return;
const fromId = this.nodeStack[this.nodeStack.length - 1];
if (!fromId) return;
// The class name is in the `constructor`/`type`/first-named-child
// depending on grammar.
const ctor =
getChildByField(node, 'constructor') ||
getChildByField(node, 'type') ||
getChildByField(node, 'name') ||
node.namedChild(0);
if (!ctor) return;
// Go composite literals: `Widget{...}` (same package) and `pkga.Widget{...}`
// (cross-package). Only a directly-named struct type is a meaningful
// instantiation target — skip slice/map/array literals (`[]T{}`,
// `map[K]V{}`) whose `type` field is a composite type, not a named type.
// Unlike `new ns.Foo()`, KEEP the package qualifier (`pkga.Widget`) so the
// Go cross-package resolver can disambiguate it to the right package's type.
if (node.type === 'composite_literal') {
if (ctor.type !== 'type_identifier' && ctor.type !== 'qualified_type') return;
let goType = getNodeText(ctor, this.source).trim();
const brIdx = goType.indexOf('['); // strip Go generic args: `Box[T]{}` -> `Box`
if (brIdx > 0) goType = goType.slice(0, brIdx).trim();
if (goType) {
this.unresolvedReferences.push({
fromNodeId: fromId,
referenceName: goType,
referenceKind: 'instantiates',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
return;
}
// Scala: `new Monoid[Int] { ... }` — the constructor is a `generic_type`
// (or qualified `stable_type_identifier`) using `[...]` type args, which the
// generic `<...>` strip below misses. Unwrap to the base type name.
if (node.type === 'instance_expression') {
const name = scalaBaseTypeName(ctor, this.source);
if (name) {
this.unresolvedReferences.push({
fromNodeId: fromId,
referenceName: name,
referenceKind: 'instantiates',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
return;
}
let className = getNodeText(ctor, this.source);
// Strip type-argument suffix first: `new Map<K, V>()` would
// otherwise produce className 'Map<K, V>' (the constructor
// field is a `generic_type` node) and resolution would fail
// because no class is named with the angle-bracket suffix.
const ltIdx = className.indexOf('<');
if (ltIdx > 0) className = className.slice(0, ltIdx);
// For namespaced/qualified constructors (`new ns.Foo()`,
// `new ns::Foo()`) keep the trailing identifier — that's what
// matches a class node in the index.
const lastDot = Math.max(
className.lastIndexOf('.'),
className.lastIndexOf('::')
);
if (lastDot >= 0) className = className.slice(lastDot + 1).replace(/^[:.]/, '');
className = className.trim();
if (className) {
this.unresolvedReferences.push({
fromNodeId: fromId,
referenceName: className,
referenceKind: 'instantiates',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
}
/**
* Static-member / value-read pass. A type/enum/class used only via a member
* VALUE — `Enum.value`, `Type.CONST`, `Colors.red`, `Foo::BAR` — recorded no
* edge, because the body walker only handled CALLS (`Type.method()`). So a
* type referenced only by an enum value or a static field looked like nothing
* depended on it (the residual frontier across Dart/Java/C#/Swift/Kotlin/PHP).
* Emit a `references` edge to the capitalized receiver. Gated to languages
* where types are Capitalized by convention, and skipped when the access is a
* call's callee (the call extractor already links the method).
*/
private extractStaticMemberRef(node: SyntaxNode): void {
if (!STATIC_MEMBER_LANGS.has(this.language)) return;
if (this.nodeStack.length === 0) return;
const ownerId = this.nodeStack[this.nodeStack.length - 1];
if (!ownerId) return;
// Dart structures member access as an `identifier` + a sibling `selector`,
// not a single node. A value-read selector (no `argument_part`) whose
// previous sibling is a capitalized identifier is `Enum.value`.
if (this.language === 'dart') {
if (node.type !== 'selector') return;
if (node.namedChildren.some((c: SyntaxNode) => c.type === 'argument_part')) return;
const prev = node.previousNamedSibling;
if (prev?.type === 'identifier' && /^[A-Z][A-Za-z0-9_]*$/.test(prev.text)) {
this.pushStaticMemberRef(prev.text, ownerId, prev);
}
return;
}
if (!MEMBER_ACCESS_TYPES.has(node.type)) return;
// Skip `Type.method()` — the access is the callee of a call, already linked.
const parent = node.parent;
if (parent && this.extractor!.callTypes.includes(parent.type)) {
const callee =
getChildByField(parent, 'function') ??
getChildByField(parent, 'method') ??
parent.namedChild(0);
if (callee && callee.startIndex === node.startIndex) return;
}
// The receiver must be a SIMPLE capitalized identifier — `Type.X`, not the
// nested `a.B.c` (whose own head member-access is visited separately) nor a
// lowercase `obj.field` / `pkg.func`.
const recv =
getChildByField(node, 'object') ??
getChildByField(node, 'expression') ??
getChildByField(node, 'scope') ??
node.namedChild(0);
if (!recv) return;
const t = recv.type;
if (
t === 'identifier' || t === 'type_identifier' || t === 'simple_identifier' ||
t === 'name' || t === 'scoped_type_identifier'
) {
const text = getNodeText(recv, this.source);
if (/^[A-Z][A-Za-z0-9_]*$/.test(text)) this.pushStaticMemberRef(text, ownerId, recv);
}
}
private pushStaticMemberRef(name: string, ownerId: string, node: SyntaxNode): void {
this.unresolvedReferences.push({
fromNodeId: ownerId,
referenceName: name,
referenceKind: 'references',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
/**
* Find a `class_body` child of an `object_creation_expression` — the
* marker for an anonymous class (`new T() { ... }`). Returns the body
* node so the caller can walk it as the anon class's members.
*/
private findAnonymousClassBody(node: SyntaxNode): SyntaxNode | null {
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
// Java: `class_body`. C# uses the same node kind.
if (child && (child.type === 'class_body' || child.type === 'declaration_list')) {
return child;
}
}
return null;
}
/**
* Extract a Java/C# anonymous class — `new T() { ...members }`. Emits a
* `class` node named `<T$anon@line>`, an `extends` reference to T (so
* Phase 5.5 interface-impl can bridge), and walks the body so its
* `method_declaration` members become method nodes under the anon class.
*
* Why this matters: without anon-class extraction, the overrides inside
* a lambda-returned `new T() { @Override int foo(){...} }` are not nodes,
* so a call through T.foo (the abstract parent method) has no static
* target — the agent has to Read the file to find the implementation.
*/
private extractAnonymousClass(node: SyntaxNode, body: SyntaxNode): void {
if (!this.extractor) return;
// The instantiated type sits in the same field/position that
// extractInstantiation reads from. Use the same lookup so the anon
// class's `extends` target matches the `instantiates` edge.
const typeNode =
getChildByField(node, 'constructor') ||
getChildByField(node, 'type') ||
getChildByField(node, 'name') ||
node.namedChild(0);
let typeName = typeNode ? getNodeText(typeNode, this.source) : 'Object';
const ltIdx = typeName.indexOf('<');
if (ltIdx > 0) typeName = typeName.slice(0, ltIdx);
const lastDot = Math.max(typeName.lastIndexOf('.'), typeName.lastIndexOf('::'));
if (lastDot >= 0) typeName = typeName.slice(lastDot + 1).replace(/^[:.]/, '');
typeName = typeName.trim() || 'Object';
const anonName = `<${typeName}$anon@${node.startPosition.row + 1}>`;
const classNode = this.createNode('class', anonName, node, {});
if (!classNode) return;
// The anonymous class implicitly extends/implements the named type.
// We can't tell at extraction time whether T is a class or an interface,
// so emit `extends`. Resolution will still bind T to whatever it is, and
// Phase 5.5 (which already handles both `extends` and `implements`) will
// bridge T's methods to the override names found in the anon body.
this.unresolvedReferences.push({
fromNodeId: classNode.id,
referenceName: typeName,
referenceKind: 'extends',
line: typeNode?.startPosition.row ?? node.startPosition.row,
column: typeNode?.startPosition.column ?? node.startPosition.column,
});
// Walk the body's children so method_declaration nodes inside become
// method nodes scoped to the anon class.
this.nodeStack.push(classNode.id);
for (let i = 0; i < body.namedChildCount; i++) {
const child = body.namedChild(i);
if (child) this.visitNode(child);
}
this.nodeStack.pop();
}
/**
* Scan `declNode` and its preceding siblings (within the parent's
* named children) for decorator nodes, emitting a `decorates`
* reference from `decoratedId` to each decorator's function name.
*
* Why preceding siblings: in TypeScript, `@Foo class Bar {}` parses
* as an `export_statement` (or top-level wrapper) with the
* `decorator` as a child *before* the `class_declaration` — so the
* decorator isn't a child of the class itself. For methods/
* properties, the decorator IS a direct child of the declaration,
* so we also scan declNode.namedChildren.
*
* Idempotent across grammars: if neither location yields decorators
* (most non-decorator-using languages), the function is a no-op.
*/
private extractDecoratorsFor(declNode: SyntaxNode, decoratedId: string): void {
const consider = (n: SyntaxNode | null): void => {
if (!n) return;
// `marker_annotation` is Java's grammar for arg-less annotations
// (`@Override`, `@Deprecated`); `attribute` is Swift's grammar for
// attributes and PROPERTY WRAPPERS (`@objc`, `@Argument`, `@Published`,
// `@State`). Without these, those usages would be silently skipped.
if (
n.type !== 'decorator' &&
n.type !== 'annotation' &&
n.type !== 'marker_annotation' &&
n.type !== 'attribute'
) {
return;
}
// Find the leading identifier: skip the `@` punct, unwrap
// a call_expression if the decorator is invoked with args.
let target: SyntaxNode | null = null;
for (let i = 0; i < n.namedChildCount; i++) {
const child = n.namedChild(i);
if (!child) continue;
if (child.type === 'call_expression') {
const fn = getChildByField(child, 'function') ?? child.namedChild(0);
if (fn) target = fn;
if (target) break;
}
if (
child.type === 'identifier' ||
child.type === 'member_expression' ||
child.type === 'scoped_identifier' ||
child.type === 'navigation_expression' ||
child.type === 'user_type' || // swift attribute → user_type (`@Argument`)
child.type === 'type_identifier'
) {
target = child;
break;
}
}
if (!target) return;
let name = getNodeText(target, this.source);
const lt = name.indexOf('<'); // strip generic args: `@Argument<T>` → `Argument`
if (lt > 0) name = name.slice(0, lt);
const lastDot = Math.max(name.lastIndexOf('.'), name.lastIndexOf('::'));
if (lastDot >= 0) name = name.slice(lastDot + 1).replace(/^[:.]/, '');
name = name.trim();
if (!name) return;
this.unresolvedReferences.push({
fromNodeId: decoratedId,
referenceName: name,
referenceKind: 'decorates',
line: n.startPosition.row + 1,
column: n.startPosition.column,
});
};
// 1. Decorators that are direct children of the declaration
// (method/property style, also some grammars for class).
for (let i = 0; i < declNode.namedChildCount; i++) {
const child = declNode.namedChild(i);
consider(child);
// Java/Kotlin/C# put annotations INSIDE a `modifiers` node
// (`@MyAnno public class X` → class_declaration → modifiers → annotation),
// so descend into it — otherwise every annotation usage is silently
// dropped and annotation types show zero dependents.
if (child && child.type === 'modifiers') {
for (let j = 0; j < child.namedChildCount; j++) {
consider(child.namedChild(j));
}
}
}
// 2. Decorators that are PRECEDING siblings of the declaration
// inside the parent's children (TypeScript class style).
// Walk BACKWARDS from the declaration and stop at the first
// non-decorator sibling — without that stop, decorators
// belonging to an EARLIER unrelated declaration leak in
// (e.g. `@A class Foo {} @B class Bar {}` would otherwise
// attribute @A to Bar).
//
// Note on identity: tree-sitter web bindings return fresh JS
// wrapper objects from `parent`/`namedChild` navigation, so
// `sibling === declNode` is unreliable — `startIndex` does
// the matching instead.
const parent = declNode.parent;
if (parent) {
const declStart = declNode.startIndex;
let declIdx = -1;
for (let i = 0; i < parent.namedChildCount; i++) {
const sibling = parent.namedChild(i);
if (sibling && sibling.startIndex === declStart) {
declIdx = i;
break;
}
}
if (declIdx > 0) {
for (let j = declIdx - 1; j >= 0; j--) {
const sibling = parent.namedChild(j);
if (!sibling) continue;
if (sibling.type !== 'decorator' && sibling.type !== 'annotation' && sibling.type !== 'marker_annotation') {
break; // non-decorator separator → stop consuming
}
consider(sibling);
}
}
}
}
/**
* Visit function body and extract calls (and structural nodes).
*
* In addition to call expressions, this also detects class/struct/enum
* definitions inside function bodies. This handles two cases:
* 1. Local class/struct/enum definitions (valid in C++, Java, etc.)
* 2. C++ macro misparsing — macros like NLOHMANN_JSON_NAMESPACE_BEGIN cause
* tree-sitter to interpret the namespace block as a function_definition,
* hiding real class/struct/enum nodes inside the "function body".
*/
/**
* Rocket route-registration macros — `routes![a::b::handler, c::d::other]`
* and `catchers![not_found]`. Tree-sitter leaves a macro body as a flat
* `token_tree` of raw tokens (`identifier`, `::`, `,`), so the handler paths
* are never seen as references and each handler fn looks like it has no caller
* — it's mounted by Rocket at runtime, not called by in-repo code, so its file
* shows 0 dependents. Walk the token tree, reconstruct each comma-separated
* path, and emit a `references` edge; the Rust path resolver
* (`resolveRustPathReference`) then links it to the handler fn. The handler
* names are explicit in source, so this is precise static extraction, not a
* heuristic — no false edges (resolution still validates each path).
*/
private extractRustRouteMacro(node: SyntaxNode): void {
if (this.language !== 'rust') return;
const macroName = node.namedChild(0);
if (!macroName) return;
const name = getNodeText(macroName, this.source);
if (name !== 'routes' && name !== 'catchers') return;
const tokenTree = node.namedChildren.find((c: SyntaxNode) => c.type === 'token_tree');
if (!tokenTree) return;
const fromId = this.nodeStack[this.nodeStack.length - 1];
if (!fromId) return;
// The token tree is a flat stream: `[ id :: id :: id , id … ]`. Group runs
// of `identifier` tokens (the `::` joiners are anonymous) into one path; a
// `,` (or the closing `]`) ends a path.
let parts: string[] = [];
let line = 0;
let column = 0;
const flush = (): void => {
if (parts.length > 0) {
this.unresolvedReferences.push({
fromNodeId: fromId,
referenceName: parts.join('::'),
referenceKind: 'references',
line,
column,
});
parts = [];
}
};
for (let i = 0; i < tokenTree.childCount; i++) {
const t = tokenTree.child(i);
if (!t) continue;
if (t.type === 'identifier') {
if (parts.length === 0) {
line = t.startPosition.row + 1;
column = t.startPosition.column;
}
parts.push(getNodeText(t, this.source));
} else if (t.type === ',') {
flush();
}
}
flush();
}
private visitFunctionBody(body: SyntaxNode, _functionId: string): void {
if (!this.extractor) return;
const visitForCallsAndStructure = (node: SyntaxNode): void => {
const nodeType = node.type;
// Rocket route-registration macros (`routes![…]` / `catchers![…]`): the
// handler paths live in a raw token tree the call walker can't see.
if (nodeType === 'macro_invocation') this.extractRustRouteMacro(node);
if (this.extractor!.callTypes.includes(nodeType)) {
this.extractCall(node);
} else if (INSTANTIATION_KINDS.has(nodeType)) {
// `new Foo()` inside a function body — emit an `instantiates`
// reference. Without this branch the body walker only knew
// about `call_expression`, so constructor invocations
// produced no graph edges at all.
this.extractInstantiation(node);
// Anonymous class with body: `new T() { ... }` (Java/C#). Extract as
// a class so interface-impl synthesis (Phase 5.5) can bridge T's
// methods to the overrides — same rationale as in visitNode.
const anonBody = this.findAnonymousClassBody(node);
if (anonBody) {
this.extractAnonymousClass(node, anonBody);
return;
}
} else if (this.extractor!.extractBareCall) {
const calleeName = this.extractor!.extractBareCall(node, this.source);
if (calleeName && this.nodeStack.length > 0) {
const callerId = this.nodeStack[this.nodeStack.length - 1];
if (callerId) {
this.unresolvedReferences.push({
fromNodeId: callerId,
referenceName: calleeName,
referenceKind: 'calls',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
}
}
// Static-member / value-read: `Enum.value`, `Type.CONST`, `Foo::BAR`.
this.extractStaticMemberRef(node);
// Local variable type annotations inside a body — `const items: Foo[] = []`,
// `const x: SomeType = svc.load()`. We deliberately do NOT create nodes for
// locals (that would explode the graph — the data-flow frontier we leave
// uncovered), but the TYPE a local is annotated with is a real dependency of
// the enclosing function, so attribute a `references` edge to it. Without
// this, a function that uses a type ONLY in its body (very common — e.g. a
// resolver building `const nodes: Node[] = []`) produced no edge to that
// type, so impact / `affected` missed the dependency entirely. We fall
// through to the default recursion below so the initializer's calls (and any
// nested declarators) are still walked.
if (
nodeType === 'variable_declarator' &&
this.TYPE_ANNOTATION_LANGUAGES.has(this.language)
) {
const ownerId = this.nodeStack[this.nodeStack.length - 1];
if (ownerId) this.extractVariableTypeAnnotation(node, ownerId);
}
// Nested NAMED functions inside a body — function declarations and named
// function expressions like `.on('mount', function onmount(){})` — become
// their own nodes so the graph can link to them (callback handlers, local
// helpers). Anonymous arrows/expressions fall through to the default
// recursion below, keeping their inner calls attributed to the enclosing
// function: this bounds the new nodes to NAMED functions only (no explosion,
// no lost edges). extractFunction walks the nested body itself, so we return.
if (this.extractor!.functionTypes.includes(nodeType)) {
const nestedName = extractName(node, this.source, this.extractor!);
if (nestedName && nestedName !== '<anonymous>') {
this.extractFunction(node);
return;
}
}
// Extract structural nodes found inside function bodies.
// Each extract method visits its own children, so we return after extracting.
if (this.extractor!.classTypes.includes(nodeType)) {
const classification = this.extractor!.classifyClassNode?.(node) ?? 'class';
if (classification === 'struct') this.extractStruct(node);
else if (classification === 'enum') this.extractEnum(node);
else if (classification === 'interface') this.extractInterface(node);
else if (classification === 'trait') this.extractClass(node, 'trait');
else this.extractClass(node);
return;
}
if (this.extractor!.structTypes.includes(nodeType)) {
this.extractStruct(node);
return;
}
if (this.extractor!.enumTypes.includes(nodeType)) {
this.extractEnum(node);
return;
}
if (this.extractor!.interfaceTypes.includes(nodeType)) {
this.extractInterface(node);
return;
}
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child) {
visitForCallsAndStructure(child);
}
}
};
visitForCallsAndStructure(body);
}
/**
* Extract inheritance relationships
*/
private extractInheritance(node: SyntaxNode, classId: string): void {
// Objective-C @interface MyClass : NSObject <ProtoA, ProtoB>
if (node.type === 'class_interface') {
const superclass = getChildByField(node, 'superclass');
if (superclass) {
const name = getNodeText(superclass, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'extends',
line: superclass.startPosition.row + 1,
column: superclass.startPosition.column,
});
}
for (let j = 0; j < node.namedChildCount; j++) {
const argList = node.namedChild(j);
if (argList?.type !== 'parameterized_arguments') continue;
for (let k = 0; k < argList.namedChildCount; k++) {
const typeName = argList.namedChild(k);
if (!typeName) continue;
const typeId = typeName.namedChildren.find(
(c: SyntaxNode) => c.type === 'type_identifier' || c.type === 'identifier'
);
if (!typeId) continue;
const protocolName = getNodeText(typeId, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: protocolName,
referenceKind: 'implements',
line: typeId.startPosition.row + 1,
column: typeId.startPosition.column,
});
}
}
return;
}
// Look for extends/implements clauses
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (!child) continue;
if (
child.type === 'extends_clause' ||
child.type === 'superclass' ||
child.type === 'base_clause' || // PHP class extends
child.type === 'extends_interfaces' // Java interface extends
) {
// Scala: `extends A[X] with B with C` packs EVERY supertype into the
// one extends_clause (separated by `with`), each a `generic_type` /
// `type_identifier` / `stable_type_identifier`. The generic path below
// takes only namedChild(0) and keeps the full text (`A[X]`), so a
// parameterized supertype — every typeclass in cats/algebra — never
// matched and `with`-mixed traits past the first were dropped. Iterate
// all supertypes and unwrap each to its base type name.
if (this.language === 'scala') {
for (const target of child.namedChildren) {
const name = scalaBaseTypeName(target, this.source);
if (name) {
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'extends',
line: target.startPosition.row + 1,
column: target.startPosition.column,
});
}
}
continue;
}
// Dart: `class C extends Base with M1, M2` — the `superclass` node holds
// the extends type as a direct `type_identifier` AND a `mixins` child
// listing the `with` mixins (and `class C with M` has ONLY mixins, no
// extends type). The generic `namedChild(0)` path would read the
// `mixins` node itself as the superclass and drop every mixin — yet
// mixins are Dart's core composition mechanism (Flutter is built on
// them). Emit `extends` for the base and `implements` for each mixin.
if (this.language === 'dart' && child.type === 'superclass') {
for (const t of child.namedChildren) {
if (t.type === 'mixins') {
for (const m of t.namedChildren) {
if (m.type === 'type_identifier') {
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: getNodeText(m, this.source),
referenceKind: 'implements',
line: m.startPosition.row + 1,
column: m.startPosition.column,
});
}
}
} else if (t.type === 'type_identifier') {
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: getNodeText(t, this.source),
referenceKind: 'extends',
line: t.startPosition.row + 1,
column: t.startPosition.column,
});
}
}
continue;
}
// Extract parent class/interface names
// Java uses type_list wrapper: superclass -> type_identifier, extends_interfaces -> type_list -> type_identifier
const typeList = child.namedChildren.find((c: SyntaxNode) => c.type === 'type_list');
const targets = typeList ? typeList.namedChildren : [child.namedChild(0)];
for (const target of targets) {
if (target) {
const name = getNodeText(target, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'extends',
line: target.startPosition.row + 1,
column: target.startPosition.column,
});
}
}
}
// C++ base classes: `class Derived : public Base, private Other` →
// base_class_clause holds access specifiers + base type(s). Emit an extends
// ref per base type (skip the public/private/protected keywords).
if (child.type === 'base_class_clause') {
for (const t of child.namedChildren) {
if (
t.type === 'type_identifier' ||
t.type === 'qualified_identifier' ||
t.type === 'template_type'
) {
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: getNodeText(t, this.source),
referenceKind: 'extends',
line: t.startPosition.row + 1,
column: t.startPosition.column,
});
}
}
}
if (
child.type === 'implements_clause' ||
child.type === 'class_interface_clause' ||
child.type === 'super_interfaces' || // Java class implements
child.type === 'interfaces' // Dart
) {
// Extract implemented interfaces
// Java uses type_list wrapper: super_interfaces -> type_list -> type_identifier
const typeList = child.namedChildren.find((c: SyntaxNode) => c.type === 'type_list');
const targets = typeList ? typeList.namedChildren : child.namedChildren;
for (const iface of targets) {
if (iface) {
const name = getNodeText(iface, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'implements',
line: iface.startPosition.row + 1,
column: iface.startPosition.column,
});
}
}
}
// Python superclass list: `class Flask(Scaffold, Mixin):`
// argument_list contains identifier children for each parent class
if (child.type === 'argument_list' && node.type === 'class_definition') {
for (const arg of child.namedChildren) {
if (arg.type === 'identifier' || arg.type === 'attribute') {
const name = getNodeText(arg, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'extends',
line: arg.startPosition.row + 1,
column: arg.startPosition.column,
});
}
}
}
// Go interface embedding: `type Querier interface { LabelQuerier; ... }`
// constraint_elem wraps the embedded interface type identifier
if (child.type === 'constraint_elem') {
const typeId = child.namedChildren.find((c: SyntaxNode) => c.type === 'type_identifier');
if (typeId) {
const name = getNodeText(typeId, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'extends',
line: typeId.startPosition.row + 1,
column: typeId.startPosition.column,
});
}
}
// Go struct embedding: field_declaration without field_identifier
// e.g. `type DB struct { *Head; Queryable }` — no field name means embedded type
if (child.type === 'field_declaration') {
const hasFieldIdentifier = child.namedChildren.some((c: SyntaxNode) => c.type === 'field_identifier');
if (!hasFieldIdentifier) {
const typeId = child.namedChildren.find((c: SyntaxNode) => c.type === 'type_identifier');
if (typeId) {
const name = getNodeText(typeId, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'extends',
line: typeId.startPosition.row + 1,
column: typeId.startPosition.column,
});
}
}
}
// Rust trait supertraits: `trait SubTrait: SuperTrait + Display { ... }`
// trait_bounds contains type_identifier, generic_type, or higher_ranked_trait_bound children
if (child.type === 'trait_bounds') {
for (const bound of child.namedChildren) {
let typeName: string | undefined;
let posNode: SyntaxNode | undefined;
if (bound.type === 'type_identifier') {
typeName = getNodeText(bound, this.source);
posNode = bound;
} else if (bound.type === 'generic_type') {
// e.g. `Deserialize<'de>`
const inner = bound.namedChildren.find((c: SyntaxNode) => c.type === 'type_identifier');
if (inner) { typeName = getNodeText(inner, this.source); posNode = inner; }
} else if (bound.type === 'higher_ranked_trait_bound') {
// e.g. `for<'de> Deserialize<'de>`
const generic = bound.namedChildren.find((c: SyntaxNode) => c.type === 'generic_type');
const typeId = generic?.namedChildren.find((c: SyntaxNode) => c.type === 'type_identifier')
?? bound.namedChildren.find((c: SyntaxNode) => c.type === 'type_identifier');
if (typeId) { typeName = getNodeText(typeId, this.source); posNode = typeId; }
}
if (typeName && posNode) {
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: typeName,
referenceKind: 'extends',
line: posNode.startPosition.row + 1,
column: posNode.startPosition.column,
});
}
}
}
// C#: `class Movie : BaseItem, IPlugin` → base_list with identifier children
// base_list combines both base class and interfaces in a single colon-separated list.
// We emit all as 'extends' since the syntax doesn't distinguish them.
if (child.type === 'base_list') {
for (const baseType of child.namedChildren) {
if (baseType) {
// For generic base types like `ClientBase<T>`, extract just the type name
const name = baseType.type === 'generic_name'
? getNodeText(baseType.namedChildren.find((c: SyntaxNode) => c.type === 'identifier') ?? baseType, this.source)
: getNodeText(baseType, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'extends',
line: baseType.startPosition.row + 1,
column: baseType.startPosition.column,
});
}
}
}
// Kotlin: `class Foo : Bar, Baz` → delegation_specifier > user_type > type_identifier
// Also handles `class Foo : Bar()` → delegation_specifier > constructor_invocation > user_type
if (child.type === 'delegation_specifier') {
const userType = child.namedChildren.find((c: SyntaxNode) => c.type === 'user_type');
const constructorInvocation = child.namedChildren.find((c: SyntaxNode) => c.type === 'constructor_invocation');
const target = userType ?? constructorInvocation;
if (target) {
const typeId = target.type === 'user_type'
? target.namedChildren.find((c: SyntaxNode) => c.type === 'type_identifier') ?? target
: target.namedChildren.find((c: SyntaxNode) => c.type === 'user_type')?.namedChildren.find((c: SyntaxNode) => c.type === 'type_identifier')
?? target.namedChildren.find((c: SyntaxNode) => c.type === 'user_type') ?? target;
const name = getNodeText(typeId, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'extends',
line: typeId.startPosition.row + 1,
column: typeId.startPosition.column,
});
}
}
// Swift: inheritance_specifier > user_type > type_identifier
// Used for class inheritance, protocol conformance, and protocol inheritance
if (child.type === 'inheritance_specifier') {
const userType = child.namedChildren.find((c: SyntaxNode) => c.type === 'user_type');
const typeId = userType?.namedChildren.find((c: SyntaxNode) => c.type === 'type_identifier');
if (typeId) {
const name = getNodeText(typeId, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'extends',
line: typeId.startPosition.row + 1,
column: typeId.startPosition.column,
});
}
}
// JavaScript class_heritage has bare identifier without extends_clause wrapper
// e.g. `class Foo extends Bar {}` → class_heritage → identifier("Bar")
if (
(child.type === 'identifier' || child.type === 'type_identifier') &&
node.type === 'class_heritage'
) {
const name = getNodeText(child, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: 'extends',
line: child.startPosition.row + 1,
column: child.startPosition.column,
});
}
// Recurse into container nodes (e.g. field_declaration_list in Go structs,
// class_heritage in TypeScript which wraps extends_clause/implements_clause)
if (child.type === 'field_declaration_list' || child.type === 'class_heritage') {
this.extractInheritance(child, classId);
}
}
}
/**
* Rust `impl Trait for Type` — creates an implements edge from Type to Trait.
* For plain `impl Type { ... }` (no trait), no inheritance edge is needed.
*/
private extractRustImplItem(node: SyntaxNode): void {
// Check if this is `impl Trait for Type` by looking for a `for` keyword
const hasFor = node.children.some(
(c: SyntaxNode) => c.type === 'for' && !c.isNamed
);
if (!hasFor) return;
// In `impl Trait for Type`, the type_identifiers are:
// first = Trait name, last = implementing Type name
// Also handle generic types like `impl<T> Trait for MyStruct<T>`
const typeIdents = node.namedChildren.filter(
(c: SyntaxNode) => c.type === 'type_identifier' || c.type === 'generic_type' || c.type === 'scoped_type_identifier'
);
if (typeIdents.length < 2) return;
const traitNode = typeIdents[0]!;
const typeNode = typeIdents[typeIdents.length - 1]!;
// Get the trait name (handle scoped paths like std::fmt::Display)
const traitName = traitNode.type === 'scoped_type_identifier'
? this.source.substring(traitNode.startIndex, traitNode.endIndex)
: getNodeText(traitNode, this.source);
// Get the implementing type name (extract inner type_identifier for generics)
let typeName: string;
if (typeNode.type === 'generic_type') {
const inner = typeNode.namedChildren.find(
(c: SyntaxNode) => c.type === 'type_identifier'
);
typeName = inner ? getNodeText(inner, this.source) : getNodeText(typeNode, this.source);
} else {
typeName = getNodeText(typeNode, this.source);
}
// Find the struct/type node for the implementing type
const typeNodeId = this.findNodeByName(typeName);
if (typeNodeId) {
this.unresolvedReferences.push({
fromNodeId: typeNodeId,
referenceName: traitName,
referenceKind: 'implements',
line: traitNode.startPosition.row + 1,
column: traitNode.startPosition.column,
});
}
}
/**
* Find a previously-extracted node by name (used for back-references like impl blocks)
*/
private findNodeByName(name: string): string | undefined {
for (const node of this.nodes) {
if (node.name === name && (node.kind === 'struct' || node.kind === 'enum' || node.kind === 'class')) {
return node.id;
}
}
return undefined;
}
/**
* Languages that support type annotations (TypeScript, etc.)
*/
private readonly TYPE_ANNOTATION_LANGUAGES = new Set([
'typescript', 'tsx', 'dart', 'kotlin', 'swift', 'rust', 'go', 'java', 'csharp', 'scala', 'php',
]);
/**
* PHP pseudo-types and `self`/`static`/`parent` that aren't project symbols.
* (Scalar primitives parse as `primitive_type` and are skipped structurally.)
*/
private readonly PHP_PSEUDO_TYPES = new Set([
'self', 'static', 'parent', 'mixed', 'object', 'iterable', 'callable', 'void',
'null', 'false', 'true', 'never', 'array', 'int', 'float', 'string', 'bool',
]);
/**
* Built-in/primitive type names that shouldn't create references
*/
private readonly BUILTIN_TYPES = new Set([
'string', 'number', 'boolean', 'void', 'null', 'undefined', 'never', 'any', 'unknown',
'object', 'symbol', 'bigint', 'true', 'false',
// Rust
'str', 'bool', 'i8', 'i16', 'i32', 'i64', 'i128', 'isize',
'u8', 'u16', 'u32', 'u64', 'u128', 'usize', 'f32', 'f64', 'char',
// Java/C#
'int', 'long', 'short', 'byte', 'float', 'double', 'char',
// Go
'int8', 'int16', 'int32', 'int64', 'uint8', 'uint16', 'uint32', 'uint64',
'float32', 'float64', 'complex64', 'complex128', 'rune', 'error',
// Scala (capitalized primitives + ubiquitous stdlib aliases)
'Int', 'Long', 'Short', 'Byte', 'Float', 'Double', 'Boolean', 'Char', 'Unit',
'String', 'Any', 'AnyRef', 'AnyVal', 'Nothing', 'Null',
]);
/**
* Extract type references from type annotations on a function/method/field node.
* Creates 'references' edges for parameter types, return types, and field types.
*/
private extractTypeAnnotations(node: SyntaxNode, nodeId: string): void {
if (!this.extractor) return;
if (!this.TYPE_ANNOTATION_LANGUAGES.has(this.language)) return;
// C# tree-sitter doesn't produce `type_identifier` leaves — it uses
// `identifier`, `predefined_type`, `qualified_name`, `generic_name`,
// etc. — so the generic walker below emits zero references for it.
// Dispatch to a C#-aware path that only walks type-position subtrees
// (the `type` field of a parameter/method/property/field), so
// parameter NAMES never accidentally surface as type refs (#381).
if (this.language === 'csharp') {
this.extractCsharpTypeRefs(node, nodeId);
return;
}
// PHP type-hints are `named_type`/`optional_type`/`union_type` wrapping a
// `name`/`qualified_name` — never `type_identifier` — so the generic walker
// below emits nothing for them. Dispatch to a PHP-aware path that walks only
// type positions (parameter / return / property types), so type-hinted
// dependencies (the constructor-injected contracts that dominate Laravel) are
// recorded and a `variable_name` like `$events` never mis-emits as a ref.
if (this.language === 'php') {
this.extractPhpTypeRefs(node, nodeId);
return;
}
// Dart: a `method_signature` wraps the real `function_signature` (where the
// params and return type live), and the return type is a bare
// `type_identifier` child, not a `type` field — so getChildByField below
// finds neither. Walk the inner signature: param names / the method name are
// `identifier` (not `type_identifier`), so only types surface.
if (this.language === 'dart') {
let sig: SyntaxNode | undefined = node;
if (node.type === 'method_signature') {
sig = node.namedChildren.find(
(c: SyntaxNode) =>
c.type === 'function_signature' ||
c.type === 'getter_signature' ||
c.type === 'setter_signature' ||
c.type === 'constructor_signature' ||
c.type === 'factory_constructor_signature'
) ?? node;
}
this.extractTypeRefsFromSubtree(sig, nodeId);
return;
}
// Extract parameter type annotations. Scala curries — `def f(a)(implicit
// M: TC)` has MULTIPLE `parameters` siblings, and the typeclass is almost
// always in the trailing implicit list — so walk every parameter list, not
// just getChildByField's first match.
if (this.language === 'scala') {
for (const pc of node.namedChildren) {
if (pc.type === 'parameters') this.extractTypeRefsFromSubtree(pc, nodeId);
}
} else {
const params = getChildByField(node, this.extractor.paramsField || 'parameters');
if (params) {
this.extractTypeRefsFromSubtree(params, nodeId);
}
}
// Extract return type annotation
const returnType = getChildByField(node, this.extractor.returnField || 'return_type');
if (returnType) {
this.extractTypeRefsFromSubtree(returnType, nodeId);
}
// Scala context bounds / type-parameter bounds: `def f[A: Monoid]`,
// `[F[_]: Monad]`, `[A <: Foo]` carry the bound type inside `type_parameters`.
// This is THE pervasive way a typeclass is required in Scala, yet the bound
// never appears in the value parameters. Param NAMES are `identifier` (not
// `type_identifier`), so only the bound types surface. Scala-only: in other
// languages a `type_parameters` child holds declaration names as
// `type_identifier` (TS `<T>`), which would wrongly surface as refs.
if (this.language === 'scala') {
const typeParams = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'type_parameters'
);
if (typeParams) {
this.extractTypeRefsFromSubtree(typeParams, nodeId);
}
}
// Extract direct type annotation (for class fields like `model: ITextModel`)
const typeAnnotation = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'type_annotation'
);
if (typeAnnotation) {
this.extractTypeRefsFromSubtree(typeAnnotation, nodeId);
}
}
/**
* Extract C# type references from a node that owns a type position —
* a method/constructor declaration, a property declaration, or a
* field declaration (which wraps `variable_declaration → type`).
*
* Walks ONLY into known type fields, so parameter names like
* `request` in `Build(UserDto request)` are never mis-emitted as
* type references. Once inside a type subtree, `walkCsharpTypePosition`
* recognizes C#'s actual type-leaf node kinds (`identifier`,
* `qualified_name`, `generic_name`, `array_type`, `nullable_type`,
* `tuple_type`, …) — none of which are `type_identifier`. Closes #381.
*/
private extractCsharpTypeRefs(node: SyntaxNode, nodeId: string): void {
// A property's type is under the `type` field; a method/constructor's RETURN
// type is under `returns` (tree-sitter-c-sharp 0.23.x — older builds used
// `type` for both). A node carries only one of the two, so checking both
// covers return types and property types without conflating them.
const directType = getChildByField(node, 'type') ?? getChildByField(node, 'returns');
if (directType) this.walkCsharpTypePosition(directType, nodeId);
// Field declarations wrap declarators in a `variable_declaration`
// whose `type` field carries the type. The outer `field_declaration`
// has no `type` field of its own, so the call above is a no-op here
// and we descend one level.
const varDecl = node.namedChildren.find((c: SyntaxNode) => c.type === 'variable_declaration');
if (varDecl) {
const vdType = getChildByField(varDecl, 'type');
if (vdType) this.walkCsharpTypePosition(vdType, nodeId);
}
// Method / constructor parameters. The field name on
// `method_declaration` is `parameters`; it points at a
// `parameter_list` whose `parameter` children each have their own
// `type` field. Walking ONLY the type field skips parameter NAMES,
// which would otherwise mis-emit as type references.
const params = getChildByField(node, 'parameters');
if (params) {
for (let i = 0; i < params.namedChildCount; i++) {
const child = params.namedChild(i);
if (!child || child.type !== 'parameter') continue;
const paramType = getChildByField(child, 'type');
if (paramType) this.walkCsharpTypePosition(paramType, nodeId);
}
}
}
/**
* Record the dependencies declared by a C# PRIMARY CONSTRUCTOR
* (`class Svc(IRepo repo, [FromKeyedServices("k")] ICache cache) { … }`,
* C# 12+). The parameter list hangs off the class/struct/record declaration
* as an unnamed-field `parameter_list` child (not the `parameters` field a
* method uses), so it's found by node type. Each parameter's declared type
* becomes a `references` edge from the owning type — these are exactly the
* services a DI-registered type depends on, so impact/blast-radius and
* "who depends on this contract" now see them. No-op when there's no primary
* constructor. (#237)
*/
private extractCsharpPrimaryCtorParamRefs(node: SyntaxNode, ownerId: string): void {
if (this.language !== 'csharp') return;
const paramList = node.namedChildren.find((c: SyntaxNode) => c.type === 'parameter_list');
if (!paramList) return;
for (let i = 0; i < paramList.namedChildCount; i++) {
const param = paramList.namedChild(i);
if (!param || param.type !== 'parameter') continue;
const paramType = getChildByField(param, 'type');
if (paramType) this.walkCsharpTypePosition(paramType, ownerId);
}
}
/**
* Walk a C# subtree that is KNOWN to be in a type position
* (return type, parameter type, property type, field type, generic
* argument). Identifiers here are type names, not parameter names.
*/
private walkCsharpTypePosition(node: SyntaxNode, fromNodeId: string): void {
// `predefined_type` is int/string/bool/etc. — never a project ref.
if (node.type === 'predefined_type') return;
// Bare type name: `Foo` in `Foo bar`, or the `Foo` inside `List<Foo>`.
if (node.type === 'identifier') {
const name = getNodeText(node, this.source);
if (name && !this.BUILTIN_TYPES.has(name)) {
this.unresolvedReferences.push({
fromNodeId,
referenceName: name,
referenceKind: 'references',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
return;
}
// `Namespace.Foo` → the rightmost identifier is the type. Emit the
// full qualified name as the reference; the resolver can still match
// on the trailing simple name when needed.
if (node.type === 'qualified_name') {
const text = getNodeText(node, this.source);
const last = text.split('.').pop() ?? text;
if (last && !this.BUILTIN_TYPES.has(last)) {
this.unresolvedReferences.push({
fromNodeId,
referenceName: last,
referenceKind: 'references',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
return;
}
// `(int Code, Foo Payload)` — tuple element has BOTH a `type` and a
// `name` field; descending into all named children would mis-emit
// the element name (`Code`, `Payload`) as a type ref. Walk only the
// type field.
if (node.type === 'tuple_element') {
const t = getChildByField(node, 'type');
if (t) this.walkCsharpTypePosition(t, fromNodeId);
return;
}
// Composite type nodes — recurse into named children. Covers
// `generic_name` (head identifier + `type_argument_list`),
// `nullable_type`, `array_type`, `pointer_type`, `tuple_type`,
// `ref_type`, and any newer wrapping shapes the grammar adds.
// Identifiers reached here are all type-positional (parameter/field
// names are gated out before we descend).
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child) this.walkCsharpTypePosition(child, fromNodeId);
}
}
/**
* Extract PHP type references from a method/function/property declaration.
* Walks ONLY type positions: each parameter's type child (inside
* `formal_parameters`), the return type, and a property's type — all
* `named_type` / `optional_type` / `union_type` / … direct children. Parameter
* and property NAMES are `variable_name` (`$x`), never type nodes, so they
* can't be mis-emitted.
*/
private extractPhpTypeRefs(node: SyntaxNode, nodeId: string): void {
const params = node.namedChildren.find((c: SyntaxNode) => c.type === 'formal_parameters');
if (params) {
for (const p of params.namedChildren) {
// simple_parameter / property_promotion_parameter / variadic_parameter
for (const c of p.namedChildren) {
if (PHP_TYPE_NODES.has(c.type)) this.walkPhpTypePosition(c, nodeId);
}
}
}
// Return type (method/function) and property type are TYPE nodes that are
// DIRECT children of the declaration.
for (const c of node.namedChildren) {
if (PHP_TYPE_NODES.has(c.type)) this.walkPhpTypePosition(c, nodeId);
}
}
/** Walk a PHP subtree KNOWN to be in a type position; emit class/interface refs. */
private walkPhpTypePosition(node: SyntaxNode, fromNodeId: string): void {
if (node.type === 'primitive_type') return; // int/string/void/…
if (node.type === 'name') {
const name = getNodeText(node, this.source);
if (name && !this.PHP_PSEUDO_TYPES.has(name)) {
this.unresolvedReferences.push({
fromNodeId, referenceName: name, referenceKind: 'references',
line: node.startPosition.row + 1, column: node.startPosition.column,
});
}
return;
}
if (node.type === 'qualified_name') {
// `App\Contracts\Logger` → match on the trailing simple name (what the
// class node is stored as, and what a `use` import brings into scope).
const last = getNodeText(node, this.source).split('\\').pop() ?? '';
if (last && !this.PHP_PSEUDO_TYPES.has(last)) {
this.unresolvedReferences.push({
fromNodeId, referenceName: last, referenceKind: 'references',
line: node.startPosition.row + 1, column: node.startPosition.column,
});
}
return;
}
// optional_type / nullable_type / union_type / intersection_type / named_type → recurse
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child) this.walkPhpTypePosition(child, fromNodeId);
}
}
/**
* Extract type references from a variable's type annotation.
*/
private extractVariableTypeAnnotation(node: SyntaxNode, nodeId: string): void {
if (!this.TYPE_ANNOTATION_LANGUAGES.has(this.language)) return;
// Find type_annotation child (covers TS `: Type`, Rust `: Type`, etc.)
const typeAnnotation = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'type_annotation'
);
if (typeAnnotation) {
this.extractTypeRefsFromSubtree(typeAnnotation, nodeId);
}
}
/**
* Recursively walk a subtree and extract all type_identifier references.
* Handles unions, intersections, generics, arrays, etc.
*/
private extractTypeRefsFromSubtree(node: SyntaxNode, fromNodeId: string): void {
if (node.type === 'type_identifier') {
const typeName = getNodeText(node, this.source);
if (typeName && !this.BUILTIN_TYPES.has(typeName)) {
this.unresolvedReferences.push({
fromNodeId,
referenceName: typeName,
referenceKind: 'references',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
return; // type_identifier is a leaf
}
// Recurse into children (handles union_type, intersection_type, generic_type, etc.)
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child) {
this.extractTypeRefsFromSubtree(child, fromNodeId);
}
}
}
/**
* Handle Pascal-specific AST structures.
* Returns true if the node was fully handled and children should be skipped.
*/
private visitPascalNode(node: SyntaxNode): boolean {
const nodeType = node.type;
// Unit/Program/Library → module node
if (nodeType === 'unit' || nodeType === 'program' || nodeType === 'library') {
const moduleNameNode = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'moduleName'
);
const name = moduleNameNode ? getNodeText(moduleNameNode, this.source) : '';
// Fallback to filename without extension if module name is empty
const moduleName = name || path.basename(this.filePath).replace(/\.[^.]+$/, '');
this.createNode('module', moduleName, node);
// Continue visiting children (interface/implementation sections)
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child) this.visitNode(child);
}
return true;
}
// declType wraps declClass/declIntf/declEnum/type-alias
// The name lives on declType, the inner node determines the kind
if (nodeType === 'declType') {
this.extractPascalDeclType(node);
return true;
}
// declUses → import nodes for each unit name
if (nodeType === 'declUses') {
this.extractPascalUses(node);
return true;
}
// declConsts → container; visit children for individual declConst
if (nodeType === 'declConsts') {
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child?.type === 'declConst') {
this.extractPascalConst(child);
}
}
return true;
}
// declConst at top level (outside declConsts)
if (nodeType === 'declConst') {
this.extractPascalConst(node);
return true;
}
// declTypes → container for type declarations
if (nodeType === 'declTypes') {
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child) this.visitNode(child);
}
return true;
}
// declVars → container for variable declarations
if (nodeType === 'declVars') {
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child?.type === 'declVar') {
const nameNode = getChildByField(child, 'name');
if (nameNode) {
const name = getNodeText(nameNode, this.source);
this.createNode('variable', name, child);
}
}
}
return true;
}
// defProc in implementation section → extract calls but don't create duplicate nodes
if (nodeType === 'defProc') {
this.extractPascalDefProc(node);
return true;
}
// declProp → property node
if (nodeType === 'declProp') {
const nameNode = getChildByField(node, 'name');
if (nameNode) {
const name = getNodeText(nameNode, this.source);
const visibility = this.extractor!.getVisibility?.(node);
this.createNode('property', name, node, { visibility });
}
return true;
}
// declField → field node
if (nodeType === 'declField') {
const nameNode = getChildByField(node, 'name');
if (nameNode) {
const name = getNodeText(nameNode, this.source);
const visibility = this.extractor!.getVisibility?.(node);
this.createNode('field', name, node, { visibility });
}
return true;
}
// declSection → visit children (propagates visibility via getVisibility)
if (nodeType === 'declSection') {
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child) this.visitNode(child);
}
return true;
}
// exprCall → extract function call reference
if (nodeType === 'exprCall') {
this.extractPascalCall(node);
return true;
}
// interface/implementation sections → visit children
if (nodeType === 'interface' || nodeType === 'implementation') {
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child) this.visitNode(child);
}
return true;
}
// block (begin..end) → visit for calls
if (nodeType === 'block') {
this.visitPascalBlock(node);
return true;
}
return false;
}
/**
* Extract a Pascal declType node (class, interface, enum, or type alias)
*/
private extractPascalDeclType(node: SyntaxNode): void {
const nameNode = getChildByField(node, 'name');
if (!nameNode) return;
const name = getNodeText(nameNode, this.source);
// Find the inner type declaration
const declClass = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'declClass'
);
const declIntf = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'declIntf'
);
const typeChild = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'type'
);
if (declClass) {
const classNode = this.createNode('class', name, node);
if (classNode) {
// Extract inheritance from typeref children of declClass
this.extractPascalInheritance(declClass, classNode.id);
// Visit class body
this.nodeStack.push(classNode.id);
for (let i = 0; i < declClass.namedChildCount; i++) {
const child = declClass.namedChild(i);
if (child) this.visitNode(child);
}
this.nodeStack.pop();
}
} else if (declIntf) {
const ifaceNode = this.createNode('interface', name, node);
if (ifaceNode) {
// Visit interface members
this.nodeStack.push(ifaceNode.id);
for (let i = 0; i < declIntf.namedChildCount; i++) {
const child = declIntf.namedChild(i);
if (child) this.visitNode(child);
}
this.nodeStack.pop();
}
} else if (typeChild) {
// Check if it contains a declEnum
const declEnum = typeChild.namedChildren.find(
(c: SyntaxNode) => c.type === 'declEnum'
);
if (declEnum) {
const enumNode = this.createNode('enum', name, node);
if (enumNode) {
// Extract enum members
this.nodeStack.push(enumNode.id);
for (let i = 0; i < declEnum.namedChildCount; i++) {
const child = declEnum.namedChild(i);
if (child?.type === 'declEnumValue') {
const memberName = getChildByField(child, 'name');
if (memberName) {
this.createNode('enum_member', getNodeText(memberName, this.source), child);
}
}
}
this.nodeStack.pop();
}
} else {
// Simple type alias: type TFoo = string / type TFoo = Integer
this.createNode('type_alias', name, node);
}
} else {
// Fallback: could be a forward declaration or simple alias
this.createNode('type_alias', name, node);
}
}
/**
* Extract Pascal uses clause into individual import nodes
*/
private extractPascalUses(node: SyntaxNode): void {
const importText = getNodeText(node, this.source).trim();
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (child?.type === 'moduleName') {
const unitName = getNodeText(child, this.source);
this.createNode('import', unitName, child, {
signature: importText,
});
// Create unresolved reference for resolution
if (this.nodeStack.length > 0) {
const parentId = this.nodeStack[this.nodeStack.length - 1];
if (parentId) {
this.unresolvedReferences.push({
fromNodeId: parentId,
referenceName: unitName,
referenceKind: 'imports',
line: child.startPosition.row + 1,
column: child.startPosition.column,
});
}
}
}
}
}
/**
* Extract a Pascal constant declaration
*/
private extractPascalConst(node: SyntaxNode): void {
const nameNode = getChildByField(node, 'name');
if (!nameNode) return;
const name = getNodeText(nameNode, this.source);
const defaultValue = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'defaultValue'
);
const sig = defaultValue ? getNodeText(defaultValue, this.source) : undefined;
this.createNode('constant', name, node, { signature: sig });
}
/**
* Extract Pascal inheritance (extends/implements) from declClass typeref children
*/
private extractPascalInheritance(declClass: SyntaxNode, classId: string): void {
const typerefs = declClass.namedChildren.filter(
(c: SyntaxNode) => c.type === 'typeref'
);
for (let i = 0; i < typerefs.length; i++) {
const ref = typerefs[i]!;
const name = getNodeText(ref, this.source);
this.unresolvedReferences.push({
fromNodeId: classId,
referenceName: name,
referenceKind: i === 0 ? 'extends' : 'implements',
line: ref.startPosition.row + 1,
column: ref.startPosition.column,
});
}
}
/**
* Extract calls and resolve method context from a Pascal defProc (implementation body).
* Does not create a new node — the declaration was already captured from the interface section.
*/
private extractPascalDefProc(node: SyntaxNode): void {
// Find the matching declaration node by name to use as call parent
const declProc = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'declProc'
);
if (!declProc) return;
const nameNode = getChildByField(declProc, 'name');
if (!nameNode) return;
const fullName = getNodeText(nameNode, this.source).trim();
// fullName is like "TAuthService.Create"
const shortName = fullName.includes('.') ? fullName.split('.').pop()! : fullName;
const fullNameKey = fullName.toLowerCase();
const shortNameKey = shortName.toLowerCase();
// Build method index on first use (O(n) once, then O(1) per lookup)
if (!this.methodIndex) {
this.methodIndex = new Map();
for (const n of this.nodes) {
if (n.kind === 'method' || n.kind === 'function') {
const nameKey = n.name.toLowerCase();
// Keep first seen short-name mapping to avoid silently overwriting earlier entries.
if (!this.methodIndex.has(nameKey)) {
this.methodIndex.set(nameKey, n.id);
}
// For Pascal methods, also index qualified forms (e.g. TAuthService.Create).
if (n.kind === 'method') {
const qualifiedParts = n.qualifiedName.split('::');
if (qualifiedParts.length >= 2) {
// Create suffix keys so both "Module.Class.Method" and "Class.Method" can resolve.
for (let i = 0; i < qualifiedParts.length - 1; i++) {
const scopedName = qualifiedParts.slice(i).join('.').toLowerCase();
this.methodIndex.set(scopedName, n.id);
}
}
}
}
}
}
const parentId =
this.methodIndex.get(fullNameKey) ||
this.methodIndex.get(shortNameKey) ||
this.nodeStack[this.nodeStack.length - 1];
if (!parentId) return;
// Visit the block for calls
const block = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'block'
);
if (block) {
this.nodeStack.push(parentId);
this.visitPascalBlock(block);
this.nodeStack.pop();
}
}
/**
* Extract function calls from a Pascal expression
*/
private extractPascalCall(node: SyntaxNode): void {
if (this.nodeStack.length === 0) return;
const callerId = this.nodeStack[this.nodeStack.length - 1];
if (!callerId) return;
// Get the callee name — first child is typically the identifier or exprDot
const firstChild = node.namedChild(0);
if (!firstChild) return;
let calleeName = '';
if (firstChild.type === 'exprDot') {
// Qualified call: Obj.Method(...)
const identifiers = firstChild.namedChildren.filter(
(c: SyntaxNode) => c.type === 'identifier'
);
if (identifiers.length > 0) {
calleeName = identifiers.map((id: SyntaxNode) => getNodeText(id, this.source)).join('.');
}
} else if (firstChild.type === 'identifier') {
calleeName = getNodeText(firstChild, this.source);
}
if (calleeName) {
this.unresolvedReferences.push({
fromNodeId: callerId,
referenceName: calleeName,
referenceKind: 'calls',
line: node.startPosition.row + 1,
column: node.startPosition.column,
});
}
// Also visit arguments for nested calls
const args = node.namedChildren.find(
(c: SyntaxNode) => c.type === 'exprArgs'
);
if (args) {
this.visitPascalBlock(args);
}
}
/**
* Recursively visit a Pascal block/statement tree for call expressions
*/
private visitPascalBlock(node: SyntaxNode): void {
for (let i = 0; i < node.namedChildCount; i++) {
const child = node.namedChild(i);
if (!child) continue;
if (child.type === 'exprCall') {
this.extractPascalCall(child);
} else if (child.type === 'exprDot') {
// Check if exprDot contains an exprCall
for (let j = 0; j < child.namedChildCount; j++) {
const grandchild = child.namedChild(j);
if (grandchild?.type === 'exprCall') {
this.extractPascalCall(grandchild);
}
}
} else {
this.visitPascalBlock(child);
}
}
}
}
/**
* Extract nodes and edges from source code.
*
* If `frameworkNames` is provided, framework-specific extractors matching
* those names and the file's language are run after the tree-sitter pass.
* Their nodes/references/errors are merged into the returned result.
*/
export function extractFromSource(
filePath: string,
source: string,
language?: Language,
frameworkNames?: string[]
): ExtractionResult {
const detectedLanguage = language || detectLanguage(filePath, source);
const fileExtension = path.extname(filePath).toLowerCase();
let result: ExtractionResult;
// Use custom extractor for Svelte
if (detectedLanguage === 'svelte') {
const extractor = new SvelteExtractor(filePath, source);
result = extractor.extract();
} else if (detectedLanguage === 'vue') {
// Use custom extractor for Vue
const extractor = new VueExtractor(filePath, source);
result = extractor.extract();
} else if (detectedLanguage === 'liquid') {
// Use custom extractor for Liquid
const extractor = new LiquidExtractor(filePath, source);
result = extractor.extract();
} else if (detectedLanguage === 'razor') {
// Use custom extractor for ASP.NET Razor (.cshtml) / Blazor (.razor) markup
const extractor = new RazorExtractor(filePath, source);
result = extractor.extract();
} else if (detectedLanguage === 'xml') {
// Custom extractor for MyBatis mapper XML. Non-mapper XML returns just a
// file node so the watcher tracks it without emitting symbols.
const extractor = new MyBatisExtractor(filePath, source);
result = extractor.extract();
} else if (isFileLevelOnlyLanguage(detectedLanguage)) {
// No symbol extraction at this stage — files are tracked at the file-record
// level only. Framework extractors (Drupal routing yml, Spring `@Value`
// resolution against application.yml/application.properties) run later and
// add per-file nodes/references when they apply.
result = { nodes: [], edges: [], unresolvedReferences: [], errors: [], durationMs: 0 };
} else if (
detectedLanguage === 'pascal' &&
(fileExtension === '.dfm' || fileExtension === '.fmx')
) {
// Use custom extractor for DFM/FMX form files
const extractor = new DfmExtractor(filePath, source);
result = extractor.extract();
} else {
const extractor = new TreeSitterExtractor(filePath, source, detectedLanguage);
result = extractor.extract();
}
// Framework-specific extraction (routes, middleware, etc.)
if (frameworkNames && frameworkNames.length > 0) {
const allResolvers = getAllFrameworkResolvers();
const applicable = getApplicableFrameworks(
allResolvers.filter((r) => frameworkNames.includes(r.name)),
detectedLanguage
);
for (const fw of applicable) {
if (!fw.extract) continue;
try {
const fwResult = fw.extract(filePath, source);
result.nodes.push(...fwResult.nodes);
result.unresolvedReferences.push(...fwResult.references);
} catch (err) {
result.errors.push({
message: `Framework extractor '${fw.name}' failed: ${
err instanceof Error ? err.message : String(err)
}`,
filePath,
severity: 'warning',
});
}
}
}
return result;
}