"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.default = simplifyAccess; function t() { const data = _interopRequireWildcard(require("@babel/types")); t = function () { return data; }; return data; } function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } } function simplifyAccess(path, bindingNames) { path.traverse(simpleAssignmentVisitor, { scope: path.scope, bindingNames, seen: new WeakSet() }); } const simpleAssignmentVisitor = { UpdateExpression: { exit(path) { const { scope, bindingNames } = this; const arg = path.get("argument"); if (!arg.isIdentifier()) return; const localName = arg.node.name; if (!bindingNames.has(localName)) return; if (scope.getBinding(localName) !== path.scope.getBinding(localName)) { return; } if (path.parentPath.isExpressionStatement() && !path.isCompletionRecord()) { const operator = path.node.operator == "++" ? "+=" : "-="; path.replaceWith(t().assignmentExpression(operator, arg.node, t().numericLiteral(1))); } else if (path.node.prefix) { path.replaceWith(t().assignmentExpression("=", t().identifier(localName), t().binaryExpression(path.node.operator[0], t().unaryExpression("+", arg.node), t().numericLiteral(1)))); } else { const old = path.scope.generateUidIdentifierBasedOnNode(arg.node, "old"); const varName = old.name; path.scope.push({ id: old }); const binary = t().binaryExpression(path.node.operator[0], t().identifier(varName), t().numericLiteral(1)); path.replaceWith(t().sequenceExpression([t().assignmentExpression("=", t().identifier(varName), t().unaryExpression("+", arg.node)), t().assignmentExpression("=", t().cloneNode(arg.node), binary), t().identifier(varName)])); } } }, AssignmentExpression: { exit(path) { const { scope, seen, bindingNames } = this; if (path.node.operator === "=") return; if (seen.has(path.node)) return; seen.add(path.node); const left = path.get("left"); if (!left.isIdentifier()) return; const localName = left.node.name; if (!bindingNames.has(localName)) return; if (scope.getBinding(localName) !== path.scope.getBinding(localName)) { return; } path.node.right = t().binaryExpression(path.node.operator.slice(0, -1), t().cloneNode(path.node.left), path.node.right); path.node.operator = "="; } } };