/**
 * Copyright (c) 2014, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * https://raw.github.com/facebook/regenerator/master/LICENSE file. An
 * additional grant of patent rights can be found in the PATENTS file in
 * the same directory.
 */

import * as t from "babel-types";

export function runtimeProperty(name) {
  return t.memberExpression(
    t.identifier("regeneratorRuntime"),
    t.identifier(name),
    false
  );
}

export function isReference(path) {
  return path.isReferenced() || path.parentPath.isAssignmentExpression({ left: path.node });
}

export function replaceWithOrRemove(path, replacement) {
  if (replacement) {
    path.replaceWith(replacement)
  } else {
    path.remove();
  }
}