1 | "use strict";
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.default = hoistVariables;
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7 |
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8 | var _t = require("@babel/types");
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9 |
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10 | const {
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11 | assignmentExpression,
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12 | expressionStatement,
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13 | identifier
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14 | } = _t;
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15 | const visitor = {
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16 | Scope(path, state) {
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17 | if (state.kind === "let") path.skip();
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18 | },
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19 |
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20 | FunctionParent(path) {
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21 | path.skip();
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22 | },
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23 |
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24 | VariableDeclaration(path, state) {
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25 | if (state.kind && path.node.kind !== state.kind) return;
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26 | const nodes = [];
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27 | const declarations = path.get("declarations");
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28 | let firstId;
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29 |
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30 | for (const declar of declarations) {
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31 | firstId = declar.node.id;
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32 |
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33 | if (declar.node.init) {
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34 | nodes.push(expressionStatement(assignmentExpression("=", declar.node.id, declar.node.init)));
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35 | }
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36 |
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37 | for (const name of Object.keys(declar.getBindingIdentifiers())) {
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38 | state.emit(identifier(name), name, declar.node.init !== null);
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39 | }
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40 | }
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41 |
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42 | if (path.parentPath.isFor({
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43 | left: path.node
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44 | })) {
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45 | path.replaceWith(firstId);
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46 | } else {
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47 | path.replaceWithMultiple(nodes);
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48 | }
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49 | }
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50 |
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51 | };
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52 |
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53 | function hoistVariables(path, emit, kind = "var") {
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54 | path.traverse(visitor, {
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55 | kind,
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56 | emit
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57 | });
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58 | } |
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