Method extractTypeAlias

src/extraction/tree-sitter.ts:2890–2992

* 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

(node: SyntaxNode)

   * 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;