HarmonyTopLevelThisParserPlugin.js 1.1 KB

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  1. /*
  2. MIT License http://www.opensource.org/licenses/mit-license.php
  3. Author Florent Cailhol @ooflorent
  4. */
  5. "use strict";
  6. const ConstDependency = require("./ConstDependency");
  7. const HarmonyExports = require("./HarmonyExports");
  8. /** @typedef {import("../Dependency").DependencyLocation} DependencyLocation */
  9. /** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
  10. /** @typedef {import("../javascript/JavascriptParser").Range} Range */
  11. const PLUGIN_NAME = "HarmonyTopLevelThisParserPlugin";
  12. class HarmonyTopLevelThisParserPlugin {
  13. /**
  14. * @param {JavascriptParser} parser the parser
  15. * @returns {void}
  16. */
  17. apply(parser) {
  18. parser.hooks.expression.for("this").tap(PLUGIN_NAME, node => {
  19. if (!parser.scope.topLevelScope) return;
  20. if (HarmonyExports.isEnabled(parser.state)) {
  21. const dep = new ConstDependency(
  22. "undefined",
  23. /** @type {Range} */ (node.range),
  24. null
  25. );
  26. dep.loc = /** @type {DependencyLocation} */ (node.loc);
  27. parser.state.module.addPresentationalDependency(dep);
  28. return true;
  29. }
  30. });
  31. }
  32. }
  33. module.exports = HarmonyTopLevelThisParserPlugin;