wrapRegExp.js 2.0 KB

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  1. import _typeof from "./typeof.js";
  2. import setPrototypeOf from "./setPrototypeOf.js";
  3. import inherits from "./inherits.js";
  4. export default function _wrapRegExp() {
  5. _wrapRegExp = function _wrapRegExp(re, groups) {
  6. return new BabelRegExp(re, void 0, groups);
  7. };
  8. var _super = RegExp.prototype,
  9. _groups = new WeakMap();
  10. function BabelRegExp(re, flags, groups) {
  11. var _this = new RegExp(re, flags);
  12. return _groups.set(_this, groups || _groups.get(re)), setPrototypeOf(_this, BabelRegExp.prototype);
  13. }
  14. function buildGroups(result, re) {
  15. var g = _groups.get(re);
  16. return Object.keys(g).reduce(function (groups, name) {
  17. var i = g[name];
  18. if ("number" == typeof i) groups[name] = result[i];else {
  19. for (var k = 0; void 0 === result[i[k]] && k + 1 < i.length;) {
  20. k++;
  21. }
  22. groups[name] = result[i[k]];
  23. }
  24. return groups;
  25. }, Object.create(null));
  26. }
  27. return inherits(BabelRegExp, RegExp), BabelRegExp.prototype.exec = function (str) {
  28. var result = _super.exec.call(this, str);
  29. if (result) {
  30. result.groups = buildGroups(result, this);
  31. var indices = result.indices;
  32. indices && (indices.groups = buildGroups(indices, this));
  33. }
  34. return result;
  35. }, BabelRegExp.prototype[Symbol.replace] = function (str, substitution) {
  36. if ("string" == typeof substitution) {
  37. var groups = _groups.get(this);
  38. return _super[Symbol.replace].call(this, str, substitution.replace(/\$<([^>]+)>/g, function (_, name) {
  39. var group = groups[name];
  40. return "$" + (Array.isArray(group) ? group.join("$") : group);
  41. }));
  42. }
  43. if ("function" == typeof substitution) {
  44. var _this = this;
  45. return _super[Symbol.replace].call(this, str, function () {
  46. var args = arguments;
  47. return "object" != _typeof(args[args.length - 1]) && (args = [].slice.call(args)).push(buildGroups(args, _this)), substitution.apply(this, args);
  48. });
  49. }
  50. return _super[Symbol.replace].call(this, str, substitution);
  51. }, _wrapRegExp.apply(this, arguments);
  52. }