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- "use strict";
- exports.__esModule = true;
- var _symbol = require("babel-runtime/core-js/symbol");
- var _symbol2 = _interopRequireDefault(_symbol);
- exports.default = function (_ref) {
- var t = _ref.types;
- var IGNORE = (0, _symbol2.default)();
- return {
- visitor: {
- Scope: function Scope(_ref2) {
- var scope = _ref2.scope;
- if (!scope.getBinding("Symbol")) {
- return;
- }
- scope.rename("Symbol");
- },
- UnaryExpression: function UnaryExpression(path) {
- var node = path.node,
- parent = path.parent;
- if (node[IGNORE]) return;
- if (path.find(function (path) {
- return path.node && !!path.node._generated;
- })) return;
- if (path.parentPath.isBinaryExpression() && t.EQUALITY_BINARY_OPERATORS.indexOf(parent.operator) >= 0) {
- var opposite = path.getOpposite();
- if (opposite.isLiteral() && opposite.node.value !== "symbol" && opposite.node.value !== "object") {
- return;
- }
- }
- if (node.operator === "typeof") {
- var call = t.callExpression(this.addHelper("typeof"), [node.argument]);
- if (path.get("argument").isIdentifier()) {
- var undefLiteral = t.stringLiteral("undefined");
- var unary = t.unaryExpression("typeof", node.argument);
- unary[IGNORE] = true;
- path.replaceWith(t.conditionalExpression(t.binaryExpression("===", unary, undefLiteral), undefLiteral, call));
- } else {
- path.replaceWith(call);
- }
- }
- }
- }
- };
- };
- function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
- module.exports = exports["default"];
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