prepack/lib/evaluators/MemberExpression.js

Execute a JS bundle, serialize global state and side effects to a snapshot that can be quickly restored.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

exports.default = function (ast, strictCode, env, realm) {
  if (ast.object.type === "Super") {
    return (0, _SuperProperty2.default)(ast, strictCode, env, realm);
  }

  // 1. Let baseReference be the result of evaluating MemberExpression.
  let baseReference = env.evaluate(ast.object, strictCode);

  // 2. Let baseValue be ? GetValue(baseReference).
  let baseValue = _singletons.Environment.GetValue(realm, baseReference);

  let propertyNameValue;
  if (ast.computed) {
    // 3. Let propertyNameReference be the result of evaluating Expression.
    let propertyNameReference = env.evaluate(ast.property, strictCode);

    // 4. Let propertyNameValue be ? GetValue(propertyNameReference).
    propertyNameValue = _singletons.Environment.GetValue(realm, propertyNameReference);
  } else {
    // 3. Let propertyNameString be StringValue of IdentifierName.
    propertyNameValue = new _index.StringValue(realm, ast.property.name);
  }

  // 5. Let bv be ? RequireObjectCoercible(baseValue).
  let bv = (0, _index2.RequireObjectCoercible)(realm, baseValue, ast.object.loc);

  // 6. Let propertyKey be ? ToPropertyKey(propertyNameValue).
  let propertyKey = _singletons.To.ToPropertyKeyPartial(realm, propertyNameValue);

  // 7. If the code matched by the syntactic production that is being evaluated is strict mode code, let strict be true, else let strict be false.
  let strict = strictCode;

  // 8. Return a value of type Reference whose base value is bv, whose referenced name is propertyKey, and whose strict reference flag is strict.
  return new _environment.Reference(bv, propertyKey, strict);
};

var _environment = require("../environment.js");

var _index = require("../values/index.js");

var _index2 = require("../methods/index.js");

var _singletons = require("../singletons.js");

var _SuperProperty = require("./SuperProperty");

var _SuperProperty2 = _interopRequireDefault(_SuperProperty);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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