traverseDestructuringAssignmentProperties.js 1.3 KB

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  1. /*
  2. MIT License http://www.opensource.org/licenses/mit-license.php
  3. Author Tobias Koppers @sokra
  4. */
  5. "use strict";
  6. /**
  7. * @import {
  8. * DestructuringAssignmentProperties,
  9. * DestructuringAssignmentProperty
  10. * } from "../javascript/JavascriptParser"
  11. */
  12. /**
  13. * Deep first traverse the properties of a destructuring assignment.
  14. * @param {DestructuringAssignmentProperties} properties destructuring assignment properties
  15. * @param {((stack: DestructuringAssignmentProperty[]) => void) | undefined=} onLeftNode on left node callback
  16. * @param {((stack: DestructuringAssignmentProperty[]) => void) | undefined=} enterNode enter node callback
  17. * @param {((stack: DestructuringAssignmentProperty[]) => void) | undefined=} exitNode exit node callback
  18. * @param {DestructuringAssignmentProperty[] | undefined=} stack stack of the walking nodes
  19. */
  20. function traverseDestructuringAssignmentProperties(
  21. properties,
  22. onLeftNode,
  23. enterNode,
  24. exitNode,
  25. stack = []
  26. ) {
  27. for (const property of properties) {
  28. stack.push(property);
  29. if (enterNode) enterNode(stack);
  30. if (property.pattern) {
  31. traverseDestructuringAssignmentProperties(
  32. property.pattern,
  33. onLeftNode,
  34. enterNode,
  35. exitNode,
  36. stack
  37. );
  38. } else if (onLeftNode) {
  39. onLeftNode(stack);
  40. }
  41. if (exitNode) exitNode(stack);
  42. stack.pop();
  43. }
  44. }
  45. module.exports = traverseDestructuringAssignmentProperties;