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