Function visit

packages/core/schematics/ng-generate/inject-migration/migration.ts:523–550

(node: ts.Node)

  // Visit recursive function navigate constructor
  const visit = (node: ts.Node) => {
    // Check if current node is identifier (variable)
    if (ts.isIdentifier(node)) {
      // Using the type checker, verify that this identifier refers
      // exactly to our destructured parameter and is not the node of the original declaration.
      if (localTypeChecker.getSymbolAtLocation(node) === symbol && node !== element.name) {
        // If the identifier is used as a shorthand property in an object literal (e.g., { myVar }),
        // must replace the entire `ShorthandPropertyAssignment` node
        // with a `PropertyAssignment` (e.g., myVar: this.myVar).
        if (ts.isShorthandPropertyAssignment(node.parent)) {
          tracker.replaceNode(
            node.parent,
            ts.factory.createPropertyAssignment(
              node,
              ts.factory.createPropertyAccessExpression(ts.factory.createThis(), propertyName),
            ),
          );
        } else {
          // Otherwise, replace the identifier with `this.propertyName`.
          tracker.replaceNode(
            node,
            ts.factory.createPropertyAccessExpression(ts.factory.createThis(), propertyName),
          );
        }
      }
    }
    ts.forEachChild(node, visit);
  };

  visit(constructorDecl.body);
}