“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 = obj; } } } } 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 = "=";
  }

}

};