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70 lines
2.4 KiB
70 lines
2.4 KiB
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = _default;
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var _helperHoistVariables = _interopRequireDefault(require("@babel/helper-hoist-variables"));
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var t = _interopRequireWildcard(require("@babel/types"));
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function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
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function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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const visitor = {
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enter(path, state) {
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if (path.isThisExpression()) {
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state.foundThis = true;
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}
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if (path.isReferencedIdentifier({
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name: "arguments"
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})) {
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state.foundArguments = true;
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}
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},
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Function(path) {
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path.skip();
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}
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};
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function _default(path, scope = path.scope) {
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const {
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node
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} = path;
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const container = t.functionExpression(null, [], node.body, node.generator, node.async);
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let callee = container;
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let args = [];
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(0, _helperHoistVariables.default)(path, id => scope.push({
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id
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}));
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const state = {
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foundThis: false,
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foundArguments: false
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};
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path.traverse(visitor, state);
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if (state.foundArguments || state.foundThis) {
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callee = t.memberExpression(container, t.identifier("apply"));
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args = [];
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if (state.foundThis) {
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args.push(t.thisExpression());
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}
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if (state.foundArguments) {
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if (!state.foundThis) args.push(t.nullLiteral());
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args.push(t.identifier("arguments"));
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}
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}
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let call = t.callExpression(callee, args);
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if (node.generator) call = t.yieldExpression(call, true);
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return t.returnStatement(call);
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}
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