prepack/lib/evaluators/FunctionDeclaration.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 = _default;

var _construct = require("../methods/construct.js");

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

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

var _strict = _interopRequireDefault(require("../utils/strict.js"));

var _descriptors = require("../descriptors.js");

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

/**
 * Copyright (c) 2017-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

/*  strict-local */
// ECMA262 14.1.20
function _default(ast, strictCode, env, realm) {
  if (ast.generator) {
    // 1. If the function code for GeneratorDeclaration is strict mode code, let strict be true. Otherwise let strict be false.
    let strict = strictCode || (0, _strict.default)(ast.body); // 2. Let name be StringValue of BindingIdentifier.

    let name;

    if (ast.id) {
      name = new _index.StringValue(realm, ast.id.name);
    } else {
      name = new _index.StringValue(realm, "default");
    } // 3. Let F be GeneratorFunctionCreate(Normal, FormalParameters, GeneratorBody, scope, strict).


    let F = _singletons.Functions.GeneratorFunctionCreate(realm, "normal", ast.params, ast.body, env, strict); // 4. Let prototype be ObjectCreate(%GeneratorPrototype%).


    let prototype = _singletons.Create.ObjectCreate(realm, realm.intrinsics.GeneratorPrototype); // 5. Perform DefinePropertyOrThrow(F, "prototype", PropertyDescriptor{[[Value]]: prototype, [[Writable]]: true, [[Enumerable]]: false, [[Configurable]]: false}).


    _singletons.Properties.DefinePropertyOrThrow(realm, F, "prototype", new _descriptors.PropertyDescriptor({
      value: prototype,
      writable: true,
      configurable: false
    })); // 6. Perform SetFunctionName(F, name).


    _singletons.Functions.SetFunctionName(realm, F, name); // 7 .Return F.


    return F;
  } else {
    // 1. If the function code for FunctionDeclaration is strict mode code, let strict be true. Otherwise let strict be false.
    let strict = strictCode || (0, _strict.default)(ast.body); // 2. Let name be StringValue of BindingIdentifier.

    let name;

    if (ast.id) {
      name = new _index.StringValue(realm, ast.id.name);
    } else {
      name = new _index.StringValue(realm, "default");
    } // 3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody, scope, strict).


    let F = _singletons.Functions.FunctionCreate(realm, "normal", ast.params, ast.body, env, strict);

    if (ast.id && ast.id.name) F.__originalName = ast.id.name; // 4. Perform MakeConstructor(F).

    (0, _construct.MakeConstructor)(realm, F); // 5. Perform SetFunctionName(F, name).

    _singletons.Functions.SetFunctionName(realm, F, name); // 6. Return F.


    return F;
  }
}
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