| 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 = simplifyAccess;
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| 7 | var _t = require("@babel/types");
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| 8 | const {
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| 9 | LOGICAL_OPERATORS,
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| 10 | assignmentExpression,
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| 11 | binaryExpression,
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| 12 | cloneNode,
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| 13 | identifier,
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| 14 | logicalExpression,
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| 15 | numericLiteral,
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| 16 | sequenceExpression,
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| 17 | unaryExpression
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| 18 | } = _t;
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| 19 | const simpleAssignmentVisitor = {
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| 20 | AssignmentExpression: {
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| 21 | exit(path) {
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| 22 | const {
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| 23 | scope,
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| 24 | seen,
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| 25 | bindingNames
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| 26 | } = this;
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| 27 | if (path.node.operator === "=") return;
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| 28 | if (seen.has(path.node)) return;
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| 29 | seen.add(path.node);
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| 30 | const left = path.get("left");
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| 31 | if (!left.isIdentifier()) return;
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| 32 | const localName = left.node.name;
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| 33 | if (!bindingNames.has(localName)) return;
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| 34 | if (scope.getBinding(localName) !== path.scope.getBinding(localName)) {
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| 35 | return;
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| 36 | }
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| 37 | const operator = path.node.operator.slice(0, -1);
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| 38 | if (LOGICAL_OPERATORS.includes(operator)) {
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| 39 | path.replaceWith(logicalExpression(operator, path.node.left, assignmentExpression("=", cloneNode(path.node.left), path.node.right)));
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| 40 | } else {
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| 41 | path.node.right = binaryExpression(operator, cloneNode(path.node.left), path.node.right);
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| 42 | path.node.operator = "=";
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| 43 | }
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| 44 | }
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| 45 | }
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| 46 | };
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| 47 | {
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| 48 | simpleAssignmentVisitor.UpdateExpression = {
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| 49 | exit(path) {
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| 50 | if (!this.includeUpdateExpression) return;
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| 51 | const {
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| 52 | scope,
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| 53 | bindingNames
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| 54 | } = this;
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| 55 | const arg = path.get("argument");
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| 56 | if (!arg.isIdentifier()) return;
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| 57 | const localName = arg.node.name;
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| 58 | if (!bindingNames.has(localName)) return;
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| 59 | if (scope.getBinding(localName) !== path.scope.getBinding(localName)) {
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| 60 | return;
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| 61 | }
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| 62 | if (path.parentPath.isExpressionStatement() && !path.isCompletionRecord()) {
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| 63 | const operator = path.node.operator === "++" ? "+=" : "-=";
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| 64 | path.replaceWith(assignmentExpression(operator, arg.node, numericLiteral(1)));
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| 65 | } else if (path.node.prefix) {
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| 66 | path.replaceWith(assignmentExpression("=", identifier(localName), binaryExpression(path.node.operator[0], unaryExpression("+", arg.node), numericLiteral(1))));
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| 67 | } else {
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| 68 | const old = path.scope.generateUidIdentifierBasedOnNode(arg.node, "old");
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| 69 | const varName = old.name;
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| 70 | path.scope.push({
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| 71 | id: old
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| 72 | });
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| 73 | const binary = binaryExpression(path.node.operator[0], identifier(varName), numericLiteral(1));
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| 74 | path.replaceWith(sequenceExpression([assignmentExpression("=", identifier(varName), unaryExpression("+", arg.node)), assignmentExpression("=", cloneNode(arg.node), binary), identifier(varName)]));
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| 75 | }
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| 76 | }
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| 77 | };
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| 78 | }
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| 79 | function simplifyAccess(path, bindingNames) {
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| 80 | {
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| 81 | var _arguments$;
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| 82 | path.traverse(simpleAssignmentVisitor, {
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| 83 | scope: path.scope,
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| 84 | bindingNames,
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| 85 | seen: new WeakSet(),
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| 86 | includeUpdateExpression: (_arguments$ = arguments[2]) != null ? _arguments$ : true
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| 87 | });
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| 88 | }
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| 89 | }
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| 90 |
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| 91 | //# sourceMappingURL=index.js.map
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