wallet-core/node_modules/systemjs/dist/system.src.js

/*
 * SystemJS v0.19.41
 */
(function() {
function bootstrap() {// from https://gist.github.com/Yaffle/1088850
(function(global) {
function URLPolyfill(url, baseURL) {
  if (typeof url != 'string')
    throw new TypeError('URL must be a string');
  var m = String(url).replace(/^\s+|\s+$/g, "").match(/^([^:\/?#]+:)?(?:\/\/(?:([^:@\/?#]*)(?::([^:@\/?#]*))?@)?(([^:\/?#]*)(?::(\d*))?))?([^?#]*)(\?[^#]*)?(#[\s\S]*)?/);
  if (!m)
    throw new RangeError('Invalid URL format');
  var protocol = m[1] || "";
  var username = m[2] || "";
  var password = m[3] || "";
  var host = m[4] || "";
  var hostname = m[5] || "";
  var port = m[6] || "";
  var pathname = m[7] || "";
  var search = m[8] || "";
  var hash = m[9] || "";
  if (baseURL !== undefined) {
    var base = baseURL instanceof URLPolyfill ? baseURL : new URLPolyfill(baseURL);
    var flag = !protocol && !host && !username;
    if (flag && !pathname && !search)
      search = base.search;
    if (flag && pathname[0] !== "/")
      pathname = (pathname ? (((base.host || base.username) && !base.pathname ? "/" : "") + base.pathname.slice(0, base.pathname.lastIndexOf("/") + 1) + pathname) : base.pathname);
    // dot segments removal
    var output = [];
    pathname.replace(/^(\.\.?(\/|$))+/, "")
      .replace(/\/(\.(\/|$))+/g, "/")
      .replace(/\/\.\.$/, "/../")
      .replace(/\/?[^\/]*/g, function (p) {
        if (p === "/..")
          output.pop();
        else
          output.push(p);
      });
    pathname = output.join("").replace(/^\//, pathname[0] === "/" ? "/" : "");
    if (flag) {
      port = base.port;
      hostname = base.hostname;
      host = base.host;
      password = base.password;
      username = base.username;
    }
    if (!protocol)
      protocol = base.protocol;
  }

  // convert URLs to use / always
  pathname = pathname.replace(/\\/g, '/');

  this.origin = host ? protocol + (protocol !== "" || host !== "" ? "//" : "") + host : "";
  this.href = protocol + (protocol && host || protocol == "file:" ? "//" : "") + (username !== "" ? username + (password !== "" ? ":" + password : "") + "@" : "") + host + pathname + search + hash;
  this.protocol = protocol;
  this.username = username;
  this.password = password;
  this.host = host;
  this.hostname = hostname;
  this.port = port;
  this.pathname = pathname;
  this.search = search;
  this.hash = hash;
}
global.URLPolyfill = URLPolyfill;
})(typeof self != 'undefined' ? self : global);(function(__global) {

  var isWorker = typeof window == 'undefined' && typeof self != 'undefined' && typeof importScripts != 'undefined';
  var isBrowser = typeof window != 'undefined' && typeof document != 'undefined';
  var isWindows = typeof process != 'undefined' && typeof process.platform != 'undefined' && !!process.platform.match(/^win/);

  if (!__global.console)
    __global.console = { assert: function() {} };

  // IE8 support
  var indexOf = Array.prototype.indexOf || function(item) {
    for (var i = 0, thisLen = this.length; i < thisLen; i++) {
      if (this[i] === item) {
        return i;
      }
    }
    return -1;
  };
  
  var defineProperty;
  (function () {
    try {
      if (!!Object.defineProperty({}, 'a', {}))
        defineProperty = Object.defineProperty;
    }
    catch (e) {
      defineProperty = function(obj, prop, opt) {
        try {
          obj[prop] = opt.value || opt.get.call(obj);
        }
        catch(e) {}
      }
    }
  })();

  var errArgs = new Error(0, '_').fileName == '_';

  function addToError(err, msg) {
    // parse the stack removing loader code lines for simplification
    if (!err.originalErr) {
      var stack = ((err.message || err) + (err.stack ? '\n' + err.stack : '')).toString().split('\n');
      var newStack = [];
      for (var i = 0; i < stack.length; i++) {
        if (typeof $__curScript == 'undefined' || stack[i].indexOf($__curScript.src) == -1)
          newStack.push(stack[i]);
      }
    }

    var newMsg = '(SystemJS) ' + (newStack ? newStack.join('\n\t') : err.message.substr(11)) + '\n\t' + msg;

    // Convert file:/// URLs to paths in Node
    if (!isBrowser)
      newMsg = newMsg.replace(isWindows ? /file:\/\/\//g : /file:\/\//g, '');

    var newErr = errArgs ? new Error(newMsg, err.fileName, err.lineNumber) : new Error(newMsg);
    
    newErr.stack = newMsg;
        
    // track the original error
    newErr.originalErr = err.originalErr || err;

    return newErr;
  }

  function __eval(source, debugName, context) {
    try {
      new Function(source).call(context);
    }
    catch(e) {
      throw addToError(e, 'Evaluating ' + debugName);
    }
  }

  var baseURI;

  // environent baseURI detection
  if (typeof document != 'undefined' && document.getElementsByTagName) {
    baseURI = document.baseURI;

    if (!baseURI) {
      var bases = document.getElementsByTagName('base');
      baseURI = bases[0] && bases[0].href || window.location.href;
    }
  }
  else if (typeof location != 'undefined') {
    baseURI = __global.location.href;
  }

  // sanitize out the hash and querystring
  if (baseURI) {
    baseURI = baseURI.split('#')[0].split('?')[0];
    baseURI = baseURI.substr(0, baseURI.lastIndexOf('/') + 1);
  }
  else if (typeof process != 'undefined' && process.cwd) {
    baseURI = 'file://' + (isWindows ? '/' : '') + process.cwd() + '/';
    if (isWindows)
      baseURI = baseURI.replace(/\\/g, '/');
  }
  else {
    throw new TypeError('No environment baseURI');
  }

  try {
    var nativeURL = new __global.URL('test:///').protocol == 'test:';
  }
  catch(e) {}

  var URL = nativeURL ? __global.URL : __global.URLPolyfill;

/*
*********************************************************************************************

  Dynamic Module Loader Polyfill

    - Implemented exactly to the former 2014-08-24 ES6 Specification Draft Rev 27, Section 15
      http://wiki.ecmascript.org/doku.php?id=harmony:specification_drafts#august_24_2014_draft_rev_27

    - Functions are commented with their spec numbers, with spec differences commented.

    - Spec bugs are commented in this code with links.

    - Abstract functions have been combined where possible, and their associated functions
      commented.

    - Realm implementation is entirely omitted.

*********************************************************************************************
*/

function Module() {}
// http://www.ecma-international.org/ecma-262/6.0/#sec-@@tostringtag
defineProperty(Module.prototype, 'toString', {
  value: function() {
    return 'Module';
  }
});
function Loader(options) {
  this._loader = {
    loaderObj: this,
    loads: [],
    modules: {},
    importPromises: {},
    moduleRecords: {}
  };

  // 26.3.3.6
  defineProperty(this, 'global', {
    get: function() {
      return __global;
    }
  });

  // 26.3.3.13 realm not implemented
}

(function() {

// Some Helpers

// logs a linkset snapshot for debugging
/* function snapshot(loader) {
  console.log('---Snapshot---');
  for (var i = 0; i < loader.loads.length; i++) {
    var load = loader.loads[i];
    var linkSetLog = '  ' + load.name + ' (' + load.status + '): ';

    for (var j = 0; j < load.linkSets.length; j++) {
      linkSetLog += '{' + logloads(load.linkSets[j].loads) + '} ';
    }
    console.log(linkSetLog);
  }
  console.log('');
}
function logloads(loads) {
  var log = '';
  for (var k = 0; k < loads.length; k++)
    log += loads[k].name + (k != loads.length - 1 ? ' ' : '');
  return log;
} */


/* function checkInvariants() {
  // see https://bugs.ecmascript.org/show_bug.cgi?id=2603#c1

  var loads = System._loader.loads;
  var linkSets = [];

  for (var i = 0; i < loads.length; i++) {
    var load = loads[i];
    console.assert(load.status == 'loading' || load.status == 'loaded', 'Each load is loading or loaded');

    for (var j = 0; j < load.linkSets.length; j++) {
      var linkSet = load.linkSets[j];

      for (var k = 0; k < linkSet.loads.length; k++)
        console.assert(loads.indexOf(linkSet.loads[k]) != -1, 'linkSet loads are a subset of loader loads');

      if (linkSets.indexOf(linkSet) == -1)
        linkSets.push(linkSet);
    }
  }

  for (var i = 0; i < loads.length; i++) {
    var load = loads[i];
    for (var j = 0; j < linkSets.length; j++) {
      var linkSet = linkSets[j];

      if (linkSet.loads.indexOf(load) != -1)
        console.assert(load.linkSets.indexOf(linkSet) != -1, 'linkSet contains load -> load contains linkSet');

      if (load.linkSets.indexOf(linkSet) != -1)
        console.assert(linkSet.loads.indexOf(load) != -1, 'load contains linkSet -> linkSet contains load');
    }
  }

  for (var i = 0; i < linkSets.length; i++) {
    var linkSet = linkSets[i];
    for (var j = 0; j < linkSet.loads.length; j++) {
      var load = linkSet.loads[j];

      for (var k = 0; k < load.dependencies.length; k++) {
        var depName = load.dependencies[k].value;
        var depLoad;
        for (var l = 0; l < loads.length; l++) {
          if (loads[l].name != depName)
            continue;
          depLoad = loads[l];
          break;
        }

        // loading records are allowed not to have their dependencies yet
        // if (load.status != 'loading')
        //  console.assert(depLoad, 'depLoad found');

        // console.assert(linkSet.loads.indexOf(depLoad) != -1, 'linkset contains all dependencies');
      }
    }
  }
} */

  // 15.2.3 - Runtime Semantics: Loader State

  // 15.2.3.11
  function createLoaderLoad(object) {
    return {
      // modules is an object for ES5 implementation
      modules: {},
      loads: [],
      loaderObj: object
    };
  }

  // 15.2.3.2 Load Records and LoadRequest Objects

  var anonCnt = 0;

  // 15.2.3.2.1
  function createLoad(name) {
    return {
      status: 'loading',
      name: name || '<Anonymous' + ++anonCnt + '>',
      linkSets: [],
      dependencies: [],
      metadata: {}
    };
  }

  // 15.2.3.2.2 createLoadRequestObject, absorbed into calling functions

  // 15.2.4

  // 15.2.4.1
  function loadModule(loader, name, options) {
    return new Promise(asyncStartLoadPartwayThrough({
      step: options.address ? 'fetch' : 'locate',
      loader: loader,
      moduleName: name,
      // allow metadata for import https://bugs.ecmascript.org/show_bug.cgi?id=3091
      moduleMetadata: options && options.metadata || {},
      moduleSource: options.source,
      moduleAddress: options.address
    }));
  }

  // 15.2.4.2
  function requestLoad(loader, request, refererName, refererAddress) {
    // 15.2.4.2.1 CallNormalize
    return new Promise(function(resolve, reject) {
      resolve(loader.loaderObj.normalize(request, refererName, refererAddress));
    })
    // 15.2.4.2.2 GetOrCreateLoad
    .then(function(name) {
      var load;
      if (loader.modules[name]) {
        load = createLoad(name);
        load.status = 'linked';
        // https://bugs.ecmascript.org/show_bug.cgi?id=2795
        load.module = loader.modules[name];
        return load;
      }

      for (var i = 0, l = loader.loads.length; i < l; i++) {
        load = loader.loads[i];
        if (load.name != name)
          continue;
        return load;
      }

      load = createLoad(name);
      loader.loads.push(load);

      proceedToLocate(loader, load);

      return load;
    });
  }

  // 15.2.4.3
  function proceedToLocate(loader, load) {
    proceedToFetch(loader, load,
      Promise.resolve()
      // 15.2.4.3.1 CallLocate
      .then(function() {
        return loader.loaderObj.locate({ name: load.name, metadata: load.metadata });
      })
    );
  }

  // 15.2.4.4
  function proceedToFetch(loader, load, p) {
    proceedToTranslate(loader, load,
      p
      // 15.2.4.4.1 CallFetch
      .then(function(address) {
        // adjusted, see https://bugs.ecmascript.org/show_bug.cgi?id=2602
        if (load.status != 'loading')
          return;
        load.address = address;

        return loader.loaderObj.fetch({ name: load.name, metadata: load.metadata, address: address });
      })
    );
  }

  // 15.2.4.5
  function proceedToTranslate(loader, load, p) {
    p
    // 15.2.4.5.1 CallTranslate
    .then(function(source) {
      if (load.status != 'loading')
        return;

      load.address = load.address || load.name;

      return Promise.resolve(loader.loaderObj.translate({ name: load.name, metadata: load.metadata, address: load.address, source: source }))

      // 15.2.4.5.2 CallInstantiate
      .then(function(source) {
        load.source = source;
        return loader.loaderObj.instantiate({ name: load.name, metadata: load.metadata, address: load.address, source: source });
      })

      // 15.2.4.5.3 InstantiateSucceeded
      .then(function(instantiateResult) {
        if (instantiateResult === undefined)
          throw new TypeError('Declarative modules unsupported in the polyfill.');
        
        if (typeof instantiateResult != 'object')
          throw new TypeError('Invalid instantiate return value');

        load.depsList = instantiateResult.deps || [];
        load.execute = instantiateResult.execute;
      })
      // 15.2.4.6 ProcessLoadDependencies
      .then(function() {
        load.dependencies = [];
        var depsList = load.depsList;

        var loadPromises = [];
        for (var i = 0, l = depsList.length; i < l; i++) (function(request, index) {
          loadPromises.push(
            requestLoad(loader, request, load.name, load.address)

            // 15.2.4.6.1 AddDependencyLoad (load is parentLoad)
            .then(function(depLoad) {

              // adjusted from spec to maintain dependency order
              // this is due to the System.register internal implementation needs
              load.dependencies[index] = {
                key: request,
                value: depLoad.name
              };

              if (depLoad.status != 'linked') {
                var linkSets = load.linkSets.concat([]);
                for (var i = 0, l = linkSets.length; i < l; i++)
                  addLoadToLinkSet(linkSets[i], depLoad);
              }

              // console.log('AddDependencyLoad ' + depLoad.name + ' for ' + load.name);
              // snapshot(loader);
            })
          );
        })(depsList[i], i);

        return Promise.all(loadPromises);
      })

      // 15.2.4.6.2 LoadSucceeded
      .then(function() {
        // console.log('LoadSucceeded ' + load.name);
        // snapshot(loader);

        load.status = 'loaded';

        var linkSets = load.linkSets.concat([]);
        for (var i = 0, l = linkSets.length; i < l; i++)
          updateLinkSetOnLoad(linkSets[i], load);
      });
    })
    // 15.2.4.5.4 LoadFailed
    ['catch'](function(exc) {
      load.status = 'failed';
      load.exception = exc;

      var linkSets = load.linkSets.concat([]);
      for (var i = 0, l = linkSets.length; i < l; i++) {
        linkSetFailed(linkSets[i], load, exc);
      }

      console.assert(load.linkSets.length == 0, 'linkSets not removed');
    });
  }

  // 15.2.4.7 PromiseOfStartLoadPartwayThrough absorbed into calling functions

  // 15.2.4.7.1
  function asyncStartLoadPartwayThrough(stepState) {
    return function(resolve, reject) {
      var loader = stepState.loader;
      var name = stepState.moduleName;
      var step = stepState.step;

      if (loader.modules[name])
        throw new TypeError('"' + name + '" already exists in the module table');

      // adjusted to pick up existing loads
      var existingLoad;
      for (var i = 0, l = loader.loads.length; i < l; i++) {
        if (loader.loads[i].name == name) {
          existingLoad = loader.loads[i];

          if (step == 'translate' && !existingLoad.source) {
            existingLoad.address = stepState.moduleAddress;
            proceedToTranslate(loader, existingLoad, Promise.resolve(stepState.moduleSource));
          }

          // a primary load -> use that existing linkset if it is for the direct load here
          // otherwise create a new linkset unit
          if (existingLoad.linkSets.length && existingLoad.linkSets[0].loads[0].name == existingLoad.name)
            return existingLoad.linkSets[0].done.then(function() {
              resolve(existingLoad);
            });
        }
      }

      var load = existingLoad || createLoad(name);

      load.metadata = stepState.moduleMetadata;

      var linkSet = createLinkSet(loader, load);

      loader.loads.push(load);

      resolve(linkSet.done);

      if (step == 'locate')
        proceedToLocate(loader, load);

      else if (step == 'fetch')
        proceedToFetch(loader, load, Promise.resolve(stepState.moduleAddress));

      else {
        console.assert(step == 'translate', 'translate step');
        load.address = stepState.moduleAddress;
        proceedToTranslate(loader, load, Promise.resolve(stepState.moduleSource));
      }
    }
  }

  // Declarative linking functions run through alternative implementation:
  // 15.2.5.1.1 CreateModuleLinkageRecord not implemented
  // 15.2.5.1.2 LookupExport not implemented
  // 15.2.5.1.3 LookupModuleDependency not implemented

  // 15.2.5.2.1
  function createLinkSet(loader, startingLoad) {
    var linkSet = {
      loader: loader,
      loads: [],
      startingLoad: startingLoad, // added see spec bug https://bugs.ecmascript.org/show_bug.cgi?id=2995
      loadingCount: 0
    };
    linkSet.done = new Promise(function(resolve, reject) {
      linkSet.resolve = resolve;
      linkSet.reject = reject;
    });
    addLoadToLinkSet(linkSet, startingLoad);
    return linkSet;
  }
  // 15.2.5.2.2
  function addLoadToLinkSet(linkSet, load) {
    if (load.status == 'failed')
      return;

    for (var i = 0, l = linkSet.loads.length; i < l; i++)
      if (linkSet.loads[i] == load)
        return;

    linkSet.loads.push(load);
    load.linkSets.push(linkSet);

    // adjustment, see https://bugs.ecmascript.org/show_bug.cgi?id=2603
    if (load.status != 'loaded') {
      linkSet.loadingCount++;
    }

    var loader = linkSet.loader;

    for (var i = 0, l = load.dependencies.length; i < l; i++) {
      if (!load.dependencies[i])
        continue;

      var name = load.dependencies[i].value;

      if (loader.modules[name])
        continue;

      for (var j = 0, d = loader.loads.length; j < d; j++) {
        if (loader.loads[j].name != name)
          continue;

        addLoadToLinkSet(linkSet, loader.loads[j]);
        break;
      }
    }
    // console.log('add to linkset ' + load.name);
    // snapshot(linkSet.loader);
  }

  // linking errors can be generic or load-specific
  // this is necessary for debugging info
  function doLink(linkSet) {
    var error = false;
    try {
      link(linkSet, function(load, exc) {
        linkSetFailed(linkSet, load, exc);
        error = true;
      });
    }
    catch(e) {
      linkSetFailed(linkSet, null, e);
      error = true;
    }
    return error;
  }

  // 15.2.5.2.3
  function updateLinkSetOnLoad(linkSet, load) {
    // console.log('update linkset on load ' + load.name);
    // snapshot(linkSet.loader);

    console.assert(load.status == 'loaded' || load.status == 'linked', 'loaded or linked');

    linkSet.loadingCount--;

    if (linkSet.loadingCount > 0)
      return;

    // adjusted for spec bug https://bugs.ecmascript.org/show_bug.cgi?id=2995
    var startingLoad = linkSet.startingLoad;

    // non-executing link variation for loader tracing
    // on the server. Not in spec.
    /***/
    if (linkSet.loader.loaderObj.execute === false) {
      var loads = [].concat(linkSet.loads);
      for (var i = 0, l = loads.length; i < l; i++) {
        var load = loads[i];
        load.module = {
          name: load.name,
          module: _newModule({}),
          evaluated: true
        };
        load.status = 'linked';
        finishLoad(linkSet.loader, load);
      }
      return linkSet.resolve(startingLoad);
    }
    /***/

    var abrupt = doLink(linkSet);

    if (abrupt)
      return;

    console.assert(linkSet.loads.length == 0, 'loads cleared');

    linkSet.resolve(startingLoad);
  }

  // 15.2.5.2.4
  function linkSetFailed(linkSet, load, exc) {
    var loader = linkSet.loader;
    var requests;

    checkError: 
    if (load) {
      if (linkSet.loads[0].name == load.name) {
        exc = addToError(exc, 'Error loading ' + load.name);
      }
      else {
        for (var i = 0; i < linkSet.loads.length; i++) {
          var pLoad = linkSet.loads[i];
          for (var j = 0; j < pLoad.dependencies.length; j++) {
            var dep = pLoad.dependencies[j];
            if (dep.value == load.name) {
              exc = addToError(exc, 'Error loading ' + load.name + ' as "' + dep.key + '" from ' + pLoad.name);
              break checkError;
            }
          }
        }
        exc = addToError(exc, 'Error loading ' + load.name + ' from ' + linkSet.loads[0].name);
      }
    }
    else {
      exc = addToError(exc, 'Error linking ' + linkSet.loads[0].name);
    }


    var loads = linkSet.loads.concat([]);
    for (var i = 0, l = loads.length; i < l; i++) {
      var load = loads[i];

      // store all failed load records
      loader.loaderObj.failed = loader.loaderObj.failed || [];
      if (indexOf.call(loader.loaderObj.failed, load) == -1)
        loader.loaderObj.failed.push(load);

      var linkIndex = indexOf.call(load.linkSets, linkSet);
      console.assert(linkIndex != -1, 'link not present');
      load.linkSets.splice(linkIndex, 1);
      if (load.linkSets.length == 0) {
        var globalLoadsIndex = indexOf.call(linkSet.loader.loads, load);
        if (globalLoadsIndex != -1)
          linkSet.loader.loads.splice(globalLoadsIndex, 1);
      }
    }
    linkSet.reject(exc);
  }

  // 15.2.5.2.5
  function finishLoad(loader, load) {
    // add to global trace if tracing
    if (loader.loaderObj.trace) {
      if (!loader.loaderObj.loads)
        loader.loaderObj.loads = {};
      var depMap = {};
      load.dependencies.forEach(function(dep) {
        depMap[dep.key] = dep.value;
      });
      loader.loaderObj.loads[load.name] = {
        name: load.name,
        deps: load.dependencies.map(function(dep){ return dep.key }),
        depMap: depMap,
        address: load.address,
        metadata: load.metadata,
        source: load.source
      };
    }
    // if not anonymous, add to the module table
    if (load.name) {
      console.assert(!loader.modules[load.name] || loader.modules[load.name].module === load.module.module, 'load not in module table');
      loader.modules[load.name] = load.module;
    }
    var loadIndex = indexOf.call(loader.loads, load);
    if (loadIndex != -1)
      loader.loads.splice(loadIndex, 1);
    for (var i = 0, l = load.linkSets.length; i < l; i++) {
      loadIndex = indexOf.call(load.linkSets[i].loads, load);
      if (loadIndex != -1)
        load.linkSets[i].loads.splice(loadIndex, 1);
    }
    load.linkSets.splice(0, load.linkSets.length);
  }

  function doDynamicExecute(linkSet, load, linkError) {
    try {
      var module = load.execute();
    }
    catch(e) {
      linkError(load, e);
      return;
    }
    if (!module || !(module instanceof Module))
      linkError(load, new TypeError('Execution must define a Module instance'));
    else
      return module;
  }

  // 26.3 Loader

  // 26.3.1.1
  // defined at top

  // importPromises adds ability to import a module twice without error - https://bugs.ecmascript.org/show_bug.cgi?id=2601
  function createImportPromise(loader, name, promise) {
    var importPromises = loader._loader.importPromises;
    return importPromises[name] = promise.then(function(m) {
      importPromises[name] = undefined;
      return m;
    }, function(e) {
      importPromises[name] = undefined;
      throw e;
    });
  }

  Loader.prototype = {
    // 26.3.3.1
    constructor: Loader,
    // 26.3.3.2
    define: function(name, source, options) {
      // check if already defined
      if (this._loader.importPromises[name])
        throw new TypeError('Module is already loading.');
      return createImportPromise(this, name, new Promise(asyncStartLoadPartwayThrough({
        step: 'translate',
        loader: this._loader,
        moduleName: name,
        moduleMetadata: options && options.metadata || {},
        moduleSource: source,
        moduleAddress: options && options.address
      })));
    },
    // 26.3.3.3
    'delete': function(name) {
      var loader = this._loader;
      delete loader.importPromises[name];
      delete loader.moduleRecords[name];
      return loader.modules[name] ? delete loader.modules[name] : false;
    },
    // 26.3.3.4 entries not implemented
    // 26.3.3.5
    get: function(key) {
      if (!this._loader.modules[key])
        return;
      return this._loader.modules[key].module;
    },
    // 26.3.3.7
    has: function(name) {
      return !!this._loader.modules[name];
    },
    // 26.3.3.8
    'import': function(name, parentName, parentAddress) {
      if (typeof parentName == 'object')
        parentName = parentName.name;

      // run normalize first
      var loaderObj = this;

      // added, see https://bugs.ecmascript.org/show_bug.cgi?id=2659
      return Promise.resolve(loaderObj.normalize(name, parentName))
      .then(function(name) {
        var loader = loaderObj._loader;

        if (loader.modules[name])
          return loader.modules[name].module;

        return loader.importPromises[name] || createImportPromise(loaderObj, name,
          loadModule(loader, name, {})
          .then(function(load) {
            delete loader.importPromises[name];
            return load.module.module;
          }));
      });
    },
    // 26.3.3.9 keys not implemented
    // 26.3.3.10
    load: function(name) {
      var loader = this._loader;
      if (loader.modules[name])
        return Promise.resolve();
      return loader.importPromises[name] || createImportPromise(this, name, new Promise(asyncStartLoadPartwayThrough({
        step: 'locate',
        loader: loader,
        moduleName: name,
        moduleMetadata: {},
        moduleSource: undefined,
        moduleAddress: undefined
      }))
      .then(function() {
        delete loader.importPromises[name];
      }));
    },
    // 26.3.3.11
    module: function(source, options) {
      var load = createLoad();
      load.address = options && options.address;
      var linkSet = createLinkSet(this._loader, load);
      var sourcePromise = Promise.resolve(source);
      var loader = this._loader;
      var p = linkSet.done.then(function() {
        return load.module.module;
      });
      proceedToTranslate(loader, load, sourcePromise);
      return p;
    },
    // 26.3.3.12
    newModule: function (obj) {
      if (typeof obj != 'object')
        throw new TypeError('Expected object');

      var m = new Module();

      var pNames = [];
      if (Object.getOwnPropertyNames && obj != null)
        pNames = Object.getOwnPropertyNames(obj);
      else
        for (var key in obj)
          pNames.push(key);

      for (var i = 0; i < pNames.length; i++) (function(key) {
        defineProperty(m, key, {
          configurable: false,
          enumerable: true,
          get: function () {
            return obj[key];
          },
          set: function() {
            throw new Error('Module exports cannot be changed externally.');
          }
        });
      })(pNames[i]);

      if (Object.freeze)
        Object.freeze(m);

      return m;
    },
    // 26.3.3.14
    set: function(name, module) {
      if (!(module instanceof Module))
        throw new TypeError('Loader.set(' + name + ', module) must be a module');
      this._loader.modules[name] = {
        module: module
      };
    },
    // 26.3.3.15 values not implemented
    // 26.3.3.16 @@iterator not implemented
    // 26.3.3.17 @@toStringTag not implemented

    // 26.3.3.18.1
    normalize: function(name, referrerName, referrerAddress) {},
    // 26.3.3.18.2
    locate: function(load) {
      return load.name;
    },
    // 26.3.3.18.3
    fetch: function(load) {
    },
    // 26.3.3.18.4
    translate: function(load) {
      return load.source;
    },
    // 26.3.3.18.5
    instantiate: function(load) {
    }
  };

  var _newModule = Loader.prototype.newModule;

/*
 * ES6 Module Declarative Linking Code
 */
  function link(linkSet, linkError) {

    var loader = linkSet.loader;

    if (!linkSet.loads.length)
      return;

    var loads = linkSet.loads.concat([]);

    for (var i = 0; i < loads.length; i++) {
      var load = loads[i];

      var module = doDynamicExecute(linkSet, load, linkError);
      if (!module)
        return;
      load.module = {
        name: load.name,
        module: module
      };
      load.status = 'linked';

      finishLoad(loader, load);
    }
  }

})();

var System;

  var fetchTextFromURL;
  if (typeof XMLHttpRequest != 'undefined') {
    fetchTextFromURL = function(url, authorization, fulfill, reject) {
      var xhr = new XMLHttpRequest();
      var sameDomain = true;
      var doTimeout = false;
      if (!('withCredentials' in xhr)) {
        // check if same domain
        var domainCheck = /^(\w+:)?\/\/([^\/]+)/.exec(url);
        if (domainCheck) {
          sameDomain = domainCheck[2] === window.location.host;
          if (domainCheck[1])
            sameDomain &= domainCheck[1] === window.location.protocol;
        }
      }
      if (!sameDomain && typeof XDomainRequest != 'undefined') {
        xhr = new XDomainRequest();
        xhr.onload = load;
        xhr.onerror = error;
        xhr.ontimeout = error;
        xhr.onprogress = function() {};
        xhr.timeout = 0;
        doTimeout = true;
      }
      function load() {
        fulfill(xhr.responseText);
      }
      function error() {
        reject(new Error('XHR error' + (xhr.status ? ' (' + xhr.status + (xhr.statusText ? ' ' + xhr.statusText  : '') + ')' : '') + ' loading ' + url));
      }

      xhr.onreadystatechange = function () {
        if (xhr.readyState === 4) {
          // in Chrome on file:/// URLs, status is 0
          if (xhr.status == 0) {
            if (xhr.responseText) {
              load();
            }
            else {
              // when responseText is empty, wait for load or error event
              // to inform if it is a 404 or empty file
              xhr.addEventListener('error', error);
              xhr.addEventListener('load', load);
            }
          }
          else if (xhr.status === 200) {
            load();
          }
          else {
            error();
          }
        }
      };
      xhr.open("GET", url, true);

      if (xhr.setRequestHeader) {
        xhr.setRequestHeader('Accept', 'application/x-es-module, */*');
        // can set "authorization: true" to enable withCredentials only
        if (authorization) {
          if (typeof authorization == 'string')
            xhr.setRequestHeader('Authorization', authorization);
          xhr.withCredentials = true;
        }
      }

      if (doTimeout) {
        setTimeout(function() {
          xhr.send();
        }, 0);
      } else {
        xhr.send(null);
      }
    };
  }
  else if (typeof require != 'undefined' && typeof process != 'undefined') {
    var fs;
    fetchTextFromURL = function(url, authorization, fulfill, reject) {
      if (url.substr(0, 8) != 'file:///')
        throw new Error('Unable to fetch "' + url + '". Only file URLs of the form file:/// allowed running in Node.');
      fs = fs || require('fs');
      if (isWindows)
        url = url.replace(/\//g, '\\').substr(8);
      else
        url = url.substr(7);
      return fs.readFile(url, function(err, data) {
        if (err) {
          return reject(err);
        }
        else {
          // Strip Byte Order Mark out if it's the leading char
          var dataString = data + '';
          if (dataString[0] === '\ufeff')
            dataString = dataString.substr(1);

          fulfill(dataString);
        }
      });
    };
  }
  else if (typeof self != 'undefined' && typeof self.fetch != 'undefined') {
    fetchTextFromURL = function(url, authorization, fulfill, reject) {
      var opts = {
        headers: {'Accept': 'application/x-es-module, */*'}
      };

      if (authorization) {
        if (typeof authorization == 'string')
          opts.headers['Authorization'] = authorization;
        opts.credentials = 'include';
      }

      fetch(url, opts)
        .then(function (r) {
          if (r.ok) {
            return r.text();
          } else {
            throw new Error('Fetch error: ' + r.status + ' ' + r.statusText);
          }
        })
        .then(fulfill, reject);
    }
  }
  else {
    throw new TypeError('No environment fetch API available.');
  }
/*
 * Traceur, Babel and TypeScript transpile hook for Loader
 */
var transpile = (function() {

  // use Traceur by default
  Loader.prototype.transpiler = 'traceur';

  function transpile(load) {
    var self = this;

    return Promise.resolve(__global[self.transpiler == 'typescript' ? 'ts' : self.transpiler]
        || (self.pluginLoader || self)['import'](self.transpiler))
    .then(function(transpiler) {
      if (transpiler.__useDefault)
        transpiler = transpiler['default'];

      var transpileFunction;
      if (transpiler.Compiler)
        transpileFunction = traceurTranspile;
      else if (transpiler.createLanguageService)
        transpileFunction = typescriptTranspile;
      else
        transpileFunction = babelTranspile;

      // note __moduleName will be part of the transformer meta in future when we have the spec for this
      return '(function(__moduleName){' + transpileFunction.call(self, load, transpiler) + '\n})("' + load.name + '");\n//# sourceURL=' + load.address + '!transpiled';
    });
  };

  function traceurTranspile(load, traceur) {
    var options = this.traceurOptions || {};
    options.modules = 'instantiate';
    options.script = false;
    if (options.sourceMaps === undefined)
      options.sourceMaps = 'inline';
    options.filename = load.address;
    options.inputSourceMap = load.metadata.sourceMap;
    options.moduleName = false;

    var compiler = new traceur.Compiler(options);

    return doTraceurCompile(load.source, compiler, options.filename);
  }
  function doTraceurCompile(source, compiler, filename) {
    try {
      return compiler.compile(source, filename);
    }
    catch(e) {
      // on older versions of traceur (<0.9.3), an array of errors is thrown
      // rather than a single error.
      if (e.length) {
        throw e[0];
      }
      throw e;
    }
  }

  function babelTranspile(load, babel) {
    var options = this.babelOptions || {};
    options.modules = 'system';
    if (options.sourceMap === undefined)
      options.sourceMap = 'inline';
    options.inputSourceMap = load.metadata.sourceMap;
    options.filename = load.address;
    options.code = true;
    options.ast = false;

    return babel.transform(load.source, options).code;
  }

  function typescriptTranspile(load, ts) {
    var options = this.typescriptOptions || {};
    options.target = options.target || ts.ScriptTarget.ES5;
    if (options.sourceMap === undefined)
      options.sourceMap = true;
    if (options.sourceMap && options.inlineSourceMap !== false)
      options.inlineSourceMap = true;

    options.module = ts.ModuleKind.System;

    return ts.transpile(load.source, options, load.address);
  }

  return transpile;
})();
// SystemJS Loader Class and Extension helpers
function SystemJSLoader() {
  Loader.call(this);

  this.paths = {};
  this._loader.paths = {};

  systemJSConstructor.call(this);
}

// inline Object.create-style class extension
function SystemProto() {};
SystemProto.prototype = Loader.prototype;
SystemJSLoader.prototype = new SystemProto();
SystemJSLoader.prototype.constructor = SystemJSLoader;

var systemJSConstructor;

function hook(name, hook) {
  SystemJSLoader.prototype[name] = hook(SystemJSLoader.prototype[name] || function() {});
}
function hookConstructor(hook) {
  systemJSConstructor = hook(systemJSConstructor || function() {});
}


var absURLRegEx = /^[^\/]+:\/\//;
function isAbsolute(name) {
  return name.match(absURLRegEx);
}
function isRel(name) {
  return (name[0] == '.' && (!name[1] || name[1] == '/' || name[1] == '.')) || name[0] == '/';
}
function isPlain(name) {
  return !isRel(name) && !isAbsolute(name);
}

var baseURIObj = new URL(baseURI);

function urlResolve(name, parent) {
  // url resolution shortpaths
  if (name[0] == '.') {
    // dot-relative url normalization
    if (name[1] == '/' && name[2] != '.')
      return (parent && parent.substr(0, parent.lastIndexOf('/') + 1) || baseURI) + name.substr(2);
  }
  else if (name[0] != '/' && name.indexOf(':') == -1) {
    // plain parent normalization
    return (parent && parent.substr(0, parent.lastIndexOf('/') + 1) || baseURI) + name;
  }

  return new URL(name, parent && parent.replace(/#/g, '%05') || baseURIObj).href.replace(/%05/g, '#');
}

// NB no specification provided for System.paths, used ideas discussed in https://github.com/jorendorff/js-loaders/issues/25
function applyPaths(loader, name) {
  // most specific (most number of slashes in path) match wins
  var pathMatch = '', wildcard, maxWildcardPrefixLen = 0;

  var paths = loader.paths;
  var pathsCache = loader._loader.paths;

  // check to see if we have a paths entry
  for (var p in paths) {
    if (paths.hasOwnProperty && !paths.hasOwnProperty(p))
      continue;

    // paths sanitization
    var path = paths[p];
    if (path !== pathsCache[p])
      path = paths[p] = pathsCache[p] = urlResolve(paths[p], isRel(paths[p]) ? baseURI : loader.baseURL);

    // exact path match
    if (p.indexOf('*') === -1) {
      if (name == p)
        return paths[p];
      
      // support trailing / in paths rules
      else if (name.substr(0, p.length - 1) == p.substr(0, p.length - 1) && (name.length < p.length || name[p.length - 1] == p[p.length - 1]) && (paths[p][paths[p].length - 1] == '/' || paths[p] == '')) {
        return paths[p].substr(0, paths[p].length - 1) + (name.length > p.length ? (paths[p] && '/' || '') + name.substr(p.length) : '');
      }
    }
    // wildcard path match
    else {
      var pathParts = p.split('*');
      if (pathParts.length > 2)
        throw new TypeError('Only one wildcard in a path is permitted');

      var wildcardPrefixLen = pathParts[0].length;
      if (wildcardPrefixLen >= maxWildcardPrefixLen &&
          name.substr(0, pathParts[0].length) == pathParts[0] &&
          name.substr(name.length - pathParts[1].length) == pathParts[1]) {
            maxWildcardPrefixLen = wildcardPrefixLen;
            pathMatch = p;
            wildcard = name.substr(pathParts[0].length, name.length - pathParts[1].length - pathParts[0].length);
          }
    }
  }

  var outPath = paths[pathMatch];
  if (typeof wildcard == 'string')
    outPath = outPath.replace('*', wildcard);

  return outPath;
}

function dedupe(deps) {
  var newDeps = [];
  for (var i = 0, l = deps.length; i < l; i++)
    if (indexOf.call(newDeps, deps[i]) == -1)
      newDeps.push(deps[i])
  return newDeps;
}

function group(deps) {
  var names = [];
  var indices = [];
  for (var i = 0, l = deps.length; i < l; i++) {
    var index = indexOf.call(names, deps[i]);
    if (index === -1) {
      names.push(deps[i]);
      indices.push([i]);
    }
    else {
      indices[index].push(i);
    }
  }
  return { names: names, indices: indices };
}

var getOwnPropertyDescriptor = true;
try {
  Object.getOwnPropertyDescriptor({ a: 0 }, 'a');
}
catch(e) {
  getOwnPropertyDescriptor = false;
}

// converts any module.exports object into an object ready for SystemJS.newModule
function getESModule(exports) {
  var esModule = {};
  // don't trigger getters/setters in environments that support them
  if ((typeof exports == 'object' || typeof exports == 'function') && exports !== __global) {
      if (getOwnPropertyDescriptor) {
        for (var p in exports) {
          // The default property is copied to esModule later on
          if (p === 'default')
            continue;
          defineOrCopyProperty(esModule, exports, p);
        }
      }
      else {
        extend(esModule, exports);
      }
  }
  esModule['default'] = exports;
  defineProperty(esModule, '__useDefault', {
    value: true
  });
  return esModule;
}

function defineOrCopyProperty(targetObj, sourceObj, propName) {
  try {
    var d;
    if (d = Object.getOwnPropertyDescriptor(sourceObj, propName))
      defineProperty(targetObj, propName, d);
  }
  catch (ex) {
    // Object.getOwnPropertyDescriptor threw an exception, fall back to normal set property
    // we dont need hasOwnProperty here because getOwnPropertyDescriptor would have returned undefined above
    targetObj[propName] = sourceObj[propName];
    return false;
  }
}

function extend(a, b, prepend) {
  var hasOwnProperty = b && b.hasOwnProperty;
  for (var p in b) {
    if (hasOwnProperty && !b.hasOwnProperty(p))
      continue;
    if (!prepend || !(p in a))
      a[p] = b[p];
  }
  return a;
}

// meta first-level extends where:
// array + array appends
// object + object extends
// other properties replace
function extendMeta(a, b, prepend) {
  var hasOwnProperty = b && b.hasOwnProperty;
  for (var p in b) {
    if (hasOwnProperty && !b.hasOwnProperty(p))
      continue;
    var val = b[p];
    if (!(p in a))
      a[p] = val;
    else if (val instanceof Array && a[p] instanceof Array)
      a[p] = [].concat(prepend ? val : a[p]).concat(prepend ? a[p] : val);
    else if (typeof val == 'object' && val !== null && typeof a[p] == 'object')
      a[p] = extend(extend({}, a[p]), val, prepend);
    else if (!prepend)
      a[p] = val;
  }
}

function extendPkgConfig(pkgCfgA, pkgCfgB, pkgName, loader, warnInvalidProperties) {
  for (var prop in pkgCfgB) {
    if (indexOf.call(['main', 'format', 'defaultExtension', 'basePath'], prop) != -1) {
      pkgCfgA[prop] = pkgCfgB[prop];
    }
    else if (prop == 'map') {
      extend(pkgCfgA.map = pkgCfgA.map || {}, pkgCfgB.map);
    }
    else if (prop == 'meta') {
      extend(pkgCfgA.meta = pkgCfgA.meta || {}, pkgCfgB.meta);
    }
    else if (prop == 'depCache') {
      for (var d in pkgCfgB.depCache) {
        var dNormalized;

        if (d.substr(0, 2) == './')
          dNormalized = pkgName + '/' + d.substr(2);
        else
          dNormalized = coreResolve.call(loader, d);
        loader.depCache[dNormalized] = (loader.depCache[dNormalized] || []).concat(pkgCfgB.depCache[d]);
      }
    }
    else if (warnInvalidProperties && indexOf.call(['browserConfig', 'nodeConfig', 'devConfig', 'productionConfig'], prop) == -1 && 
        (!pkgCfgB.hasOwnProperty || pkgCfgB.hasOwnProperty(prop))) {
      warn.call(loader, '"' + prop + '" is not a valid package configuration option in package ' + pkgName);
    }
  }
}

// deeply-merge (to first level) config with any existing package config
function setPkgConfig(loader, pkgName, cfg, prependConfig) {
  var pkg;

  // first package is config by reference for fast path, cloned after that
  if (!loader.packages[pkgName]) {
    pkg = loader.packages[pkgName] = cfg;
  }
  else {
    var basePkg = loader.packages[pkgName];
    pkg = loader.packages[pkgName] = {};

    extendPkgConfig(pkg, prependConfig ? cfg : basePkg, pkgName, loader, prependConfig);
    extendPkgConfig(pkg, prependConfig ? basePkg : cfg, pkgName, loader, !prependConfig);
  }
  
  // main object becomes main map
  if (typeof pkg.main == 'object') {
    pkg.map = pkg.map || {};
    pkg.map['./@main'] = pkg.main;
    pkg.main['default'] = pkg.main['default'] || './';
    pkg.main = '@main';
  }

  return pkg;
}

function warn(msg) {
  if (this.warnings && typeof console != 'undefined' && console.warn)
    console.warn(msg);
}
// we define a __exec for globally-scoped execution
// used by module format implementations
var __exec;

(function() {

  var hasBuffer = typeof Buffer != 'undefined';
  try {
    if (hasBuffer && new Buffer('a').toString('base64') != 'YQ==')
      hasBuffer = false;
  }
  catch(e) {
    hasBuffer = false;
  }

  var sourceMapPrefix = '\n//# sourceMappingURL=data:application/json;base64,';
  function inlineSourceMap(sourceMapString) {
    if (hasBuffer)
      return sourceMapPrefix + new Buffer(sourceMapString).toString('base64');
    else if (typeof btoa != 'undefined')
      return sourceMapPrefix + btoa(unescape(encodeURIComponent(sourceMapString)));
    else
      return '';
  }

  function getSource(load, wrap) {
    var lastLineIndex = load.source.lastIndexOf('\n');

    // wrap ES formats with a System closure for System global encapsulation
    if (load.metadata.format == 'global')
      wrap = false;

    var sourceMap = load.metadata.sourceMap;
    if (sourceMap) {
      if (typeof sourceMap != 'object')
        throw new TypeError('load.metadata.sourceMap must be set to an object.');

      sourceMap = JSON.stringify(sourceMap);
    }

    return (wrap ? '(function(System, SystemJS) {' : '') + load.source + (wrap ? '\n})(System, System);' : '')
        // adds the sourceURL comment if not already present
        + (load.source.substr(lastLineIndex, 15) != '\n//# sourceURL='
          ? '\n//# sourceURL=' + load.address + (sourceMap ? '!transpiled' : '') : '')
        // add sourceMappingURL if load.metadata.sourceMap is set
        + (sourceMap && inlineSourceMap(sourceMap) || '');
  }

  var curLoad;

  // System.register, System.registerDynamic, AMD define pipeline
  // if currently evalling code here, immediately reduce the registered entry against the load record
  hook('pushRegister_', function() {
    return function(register) {
      if (!curLoad)
        return false;

      this.reduceRegister_(curLoad, register);
      return true;
    };
  });

  // System clobbering protection (mostly for Traceur)
  var curSystem;
  var callCounter = 0;
  function preExec(loader, load) {
    curLoad = load;
    if (callCounter++ == 0)
      curSystem = __global.System;
    __global.System = __global.SystemJS = loader;
  }
  function postExec() {
    if (--callCounter == 0)
      __global.System = __global.SystemJS = curSystem;
    curLoad = undefined;
  }

  var useVm;
  var vm;
  __exec = function(load) {
    if (!load.source)
      return;
    if ((load.metadata.integrity || load.metadata.nonce) && supportsScriptExec)
      return scriptExec.call(this, load);
    try {
      preExec(this, load);
      curLoad = load;
      // global scoped eval for node (avoids require scope leak)
      if (!vm && this._nodeRequire) {
        vm = this._nodeRequire('vm');
        useVm = vm.runInThisContext("typeof System !== 'undefined' && System") === this;
      }
      if (useVm)
        vm.runInThisContext(getSource(load, true), { filename: load.address + (load.metadata.sourceMap ? '!transpiled' : '') });
      else
        (0, eval)(getSource(load, true));
      postExec();
    }
    catch(e) {
      postExec();
      throw addToError(e, 'Evaluating ' + load.address);
    }
  };

  var supportsScriptExec = false;
  if (isBrowser && typeof document != 'undefined' && document.getElementsByTagName) {
    if (!(window.chrome && window.chrome.extension || navigator.userAgent.match(/^Node\.js/)))
      supportsScriptExec = true;
  }

  // script execution via injecting a script tag into the page
  // this allows CSP integrity and nonce to be set for CSP environments
  var head;
  function scriptExec(load) {
    if (!head)
      head = document.head || document.body || document.documentElement;

    var script = document.createElement('script');
    script.text = getSource(load, false);
    var onerror = window.onerror;
    var e;
    window.onerror = function(_e) {
      e = addToError(_e, 'Evaluating ' + load.address);
      if (onerror)
        onerror.apply(this, arguments);
    }
    preExec(this, load);

    if (load.metadata.integrity)
      script.setAttribute('integrity', load.metadata.integrity);
    if (load.metadata.nonce)
      script.setAttribute('nonce', load.metadata.nonce);

    head.appendChild(script);
    head.removeChild(script);
    postExec();
    window.onerror = onerror;
    if (e)
      throw e;
  }

})();
function readMemberExpression(p, value) {
  var pParts = p.split('.');
  while (pParts.length)
    value = value[pParts.shift()];
  return value;
}

function getMapMatch(map, name) {
  var bestMatch, bestMatchLength = 0;

  for (var p in map) {
    if (name.substr(0, p.length) == p && (name.length == p.length || name[p.length] == '/')) {
      var curMatchLength = p.split('/').length;
      if (curMatchLength <= bestMatchLength)
        continue;
      bestMatch = p;
      bestMatchLength = curMatchLength;
    }
  }

  return bestMatch;
}

function prepareBaseURL(loader) {
  // ensure baseURl is fully normalized
  if (this._loader.baseURL !== this.baseURL) {
    if (this.baseURL[this.baseURL.length - 1] != '/')
      this.baseURL += '/';

    this._loader.baseURL = this.baseURL = new URL(this.baseURL, baseURIObj).href;
  }
}

var envModule;
function setProduction(isProduction, isBuilder) {
  this.set('@system-env', envModule = this.newModule({
    browser: isBrowser,
    node: !!this._nodeRequire,
    production: !isBuilder && isProduction,
    dev: isBuilder || !isProduction,
    build: isBuilder,
    'default': true
  }));
}

hookConstructor(function(constructor) {
  return function() {
    constructor.call(this);

    // support baseURL
    this.baseURL = baseURI;

    // support map and paths
    this.map = {};

    // make the location of the system.js script accessible
    if (typeof $__curScript != 'undefined')
      this.scriptSrc = $__curScript.src;

    // global behaviour flags
    this.warnings = false;
    this.defaultJSExtensions = false;
    this.pluginFirst = false;
    this.loaderErrorStack = false;

    // by default load ".json" files as json
    // leading * meta doesn't need normalization
    // NB add this in next breaking release
    // this.meta['*.json'] = { format: 'json' };

    // support the empty module, as a concept
    this.set('@empty', this.newModule({}));

    setProduction.call(this, false, false);
  };
});

// include the node require since we're overriding it
if (typeof require != 'undefined' && typeof process != 'undefined' && !process.browser)
  SystemJSLoader.prototype._nodeRequire = require;

/*
  Core SystemJS Normalization

  If a name is relative, we apply URL normalization to the page
  If a name is an absolute URL, we leave it as-is

  Plain names (neither of the above) run through the map and paths
  normalization phases.

  The paths normalization phase applies last (paths extension), which
  defines the `decanonicalize` function and normalizes everything into
  a URL.
 */

var parentModuleContext;
function getNodeModule(name, baseURL) {
  if (!isPlain(name))
    throw new Error('Node module ' + name + ' can\'t be loaded as it is not a package require.');

  if (!parentModuleContext) {
    var Module = this._nodeRequire('module');
    var base = baseURL.substr(isWindows ? 8 : 7);
    parentModuleContext = new Module(base);
    parentModuleContext.paths = Module._nodeModulePaths(base);
  }
  return parentModuleContext.require(name);
}

function coreResolve(name, parentName) {
  // standard URL resolution
  if (isRel(name))
    return urlResolve(name, parentName);
  else if (isAbsolute(name))
    return name;

  // plain names not starting with './', '://' and '/' go through custom resolution
  var mapMatch = getMapMatch(this.map, name);

  if (mapMatch) {
    name = this.map[mapMatch] + name.substr(mapMatch.length);

    if (isRel(name))
      return urlResolve(name);
    else if (isAbsolute(name))
      return name;
  }

  if (this.has(name))
    return name;

  // dynamically load node-core modules when requiring `@node/fs` for example
  if (name.substr(0, 6) == '@node/') {
    if (!this._nodeRequire)
      throw new TypeError('Error loading ' + name + '. Can only load node core modules in Node.');
    if (this.builder)
      this.set(name, this.newModule({}));
    else
      this.set(name, this.newModule(getESModule(getNodeModule.call(this, name.substr(6), this.baseURL))));
    return name;
  }

  // prepare the baseURL to ensure it is normalized
  prepareBaseURL.call(this);

  return applyPaths(this, name) || this.baseURL + name;
}

hook('normalize', function(normalize) {
  return function(name, parentName, skipExt) {
    var resolved = coreResolve.call(this, name, parentName);
    if (this.defaultJSExtensions && !skipExt && resolved.substr(resolved.length - 3, 3) != '.js' && !isPlain(resolved))
      resolved += '.js';
    return resolved;
  };
});

// percent encode just '#' in urls if using HTTP requests
var httpRequest = typeof XMLHttpRequest != 'undefined';
hook('locate', function(locate) {
  return function(load) {
    return Promise.resolve(locate.call(this, load))
    .then(function(address) {
      if (httpRequest)
        return address.replace(/#/g, '%23');
      return address;
    });
  };
});

/*
 * Fetch with authorization
 */
hook('fetch', function() {
  return function(load) {
    return new Promise(function(resolve, reject) {
      fetchTextFromURL(load.address, load.metadata.authorization, resolve, reject);
    });
  };
});

/*
  __useDefault

  When a module object looks like:
  newModule(
    __useDefault: true,
    default: 'some-module'
  })

  Then importing that module provides the 'some-module'
  result directly instead of the full module.

  Useful for eg module.exports = function() {}
*/
hook('import', function(systemImport) {
  return function(name, parentName, parentAddress) {
    if (parentName && parentName.name)
      warn.call(this, 'SystemJS.import(name, { name: parentName }) is deprecated for SystemJS.import(name, parentName), while importing ' + name + ' from ' + parentName.name);
    return systemImport.call(this, name, parentName, parentAddress).then(function(module) {
      return module.__useDefault ? module['default'] : module;
    });
  };
});

/*
 * Allow format: 'detect' meta to enable format detection
 */
hook('translate', function(systemTranslate) {
  return function(load) {
    if (load.metadata.format == 'detect')
      load.metadata.format = undefined;
    return systemTranslate.apply(this, arguments);
  };
});


/*
 * JSON format support
 *
 * Supports loading JSON files as a module format itself
 *
 * Usage:
 *
 * SystemJS.config({
 *   meta: {
 *     '*.json': { format: 'json' }
 *   }
 * });
 *
 * Module is returned as if written:
 *
 * export default {JSON}
 *
 * No named exports are provided
 *
 * Files ending in ".json" are treated as json automatically by SystemJS
 */
hook('instantiate', function(instantiate) {
  return function(load) {
    if (load.metadata.format == 'json' && !this.builder) {
      var entry = load.metadata.entry = createEntry();
      entry.deps = [];
      entry.execute = function() {
        try {
          return JSON.parse(load.source);
        }
        catch(e) {
          throw new Error("Invalid JSON file " + load.name);
        }
      };
    }
  };
})

/*
 Extend config merging one deep only

  loader.config({
    some: 'random',
    config: 'here',
    deep: {
      config: { too: 'too' }
    }
  });

  <=>

  loader.some = 'random';
  loader.config = 'here'
  loader.deep = loader.deep || {};
  loader.deep.config = { too: 'too' };


  Normalizes meta and package configs allowing for:

  SystemJS.config({
    meta: {
      './index.js': {}
    }
  });

  To become

  SystemJS.meta['https://thissite.com/index.js'] = {};

  For easy normalization canonicalization with latest URL support.

*/
function envSet(loader, cfg, envCallback) {
  if (envModule.browser && cfg.browserConfig)
    envCallback(cfg.browserConfig);
  if (envModule.node && cfg.nodeConfig)
    envCallback(cfg.nodeConfig);
  if (envModule.dev && cfg.devConfig)
    envCallback(cfg.devConfig);
  if (envModule.build && cfg.buildConfig)
    envCallback(cfg.buildConfig);
  if (envModule.production && cfg.productionConfig)
    envCallback(cfg.productionConfig);
}

SystemJSLoader.prototype.getConfig = function(name) {
  var cfg = {};
  var loader = this;
  for (var p in loader) {
    if (loader.hasOwnProperty && !loader.hasOwnProperty(p) || p in SystemJSLoader.prototype && p != 'transpiler')
      continue;
    if (indexOf.call(['_loader', 'amdDefine', 'amdRequire', 'defined', 'failed', 'version', 'loads'], p) == -1)
      cfg[p] = loader[p];
  }
  cfg.production = envModule.production;
  return cfg;
};

var curCurScript;
SystemJSLoader.prototype.config = function(cfg, isEnvConfig) {
  var loader = this;

  if ('loaderErrorStack' in cfg) {
    curCurScript = $__curScript;
    if (cfg.loaderErrorStack)
      $__curScript = undefined;
    else
      $__curScript = curCurScript;
  }

  if ('warnings' in cfg)
    loader.warnings = cfg.warnings;

  // transpiler deprecation path
  if (cfg.transpilerRuntime === false)
    loader._loader.loadedTranspilerRuntime = true;

  if ('production' in cfg || 'build' in cfg)
    setProduction.call(loader, !!cfg.production, !!(cfg.build || envModule && envModule.build));

  if (!isEnvConfig) {
    // if using nodeConfig / browserConfig / productionConfig, take baseURL from there
    // these exceptions will be unnecessary when we can properly implement config queuings
    var baseURL;
    envSet(loader, cfg, function(cfg) {
      baseURL = baseURL || cfg.baseURL;
    });
    baseURL = baseURL || cfg.baseURL;

    // always configure baseURL first
    if (baseURL) {
      var hasConfig = false;
      function checkHasConfig(obj) {
        for (var p in obj)
          if (obj.hasOwnProperty(p))
            return true;
      }
      if (checkHasConfig(loader.packages) || checkHasConfig(loader.meta) || checkHasConfig(loader.depCache) || checkHasConfig(loader.bundles) || checkHasConfig(loader.packageConfigPaths))
        throw new TypeError('Incorrect configuration order. The baseURL must be configured with the first SystemJS.config call.');

      this.baseURL = baseURL;
      prepareBaseURL.call(this);
    }

    if (cfg.paths)
      extend(loader.paths, cfg.paths);

    envSet(loader, cfg, function(cfg) {
      if (cfg.paths)
        extend(loader.paths, cfg.paths);
    });

    // warn on wildcard path deprecations
    if (this.warnings) {
      for (var p in loader.paths)
        if (p.indexOf('*') != -1)
          warn.call(loader, 'Paths configuration "' + p + '" -> "' + loader.paths[p] + '" uses wildcards which are being deprecated for just leaving a trailing "/" to indicate folder paths.');
    }
  }

  if (cfg.defaultJSExtensions) {
    loader.defaultJSExtensions = cfg.defaultJSExtensions;
    warn.call(loader, 'The defaultJSExtensions configuration option is deprecated, use packages configuration instead.');
  }

  if (cfg.pluginFirst)
    loader.pluginFirst = cfg.pluginFirst;

  if (cfg.map) {
    for (var p in cfg.map) {
      var v = cfg.map[p];

      // object map backwards-compat into packages configuration
      if (typeof v !== 'string') {
        var defaultJSExtension = loader.defaultJSExtensions && p.substr(p.length - 3, 3) != '.js';
        var prop = loader.decanonicalize(p);
        if (defaultJSExtension && prop.substr(prop.length - 3, 3) == '.js')
          prop = prop.substr(0, prop.length - 3);

        // if a package main, revert it
        var pkgMatch = '';
        for (var pkg in loader.packages) {
          if (prop.substr(0, pkg.length) == pkg
              && (!prop[pkg.length] || prop[pkg.length] == '/')
              && pkgMatch.split('/').length < pkg.split('/').length)
            pkgMatch = pkg;
        }
        if (pkgMatch && loader.packages[pkgMatch].main)
          prop = prop.substr(0, prop.length - loader.packages[pkgMatch].main.length - 1);

        var pkg = loader.packages[prop] = loader.packages[prop] || {};
        pkg.map = v;
      }
      else {
        loader.map[p] = v;
      }
    }
  }

  if (cfg.packageConfigPaths) {
    var packageConfigPaths = [];
    for (var i = 0; i < cfg.packageConfigPaths.length; i++) {
      var path = cfg.packageConfigPaths[i];
      var packageLength = Math.max(path.lastIndexOf('*') + 1, path.lastIndexOf('/'));
      var normalized = coreResolve.call(loader, path.substr(0, packageLength));
      packageConfigPaths[i] = normalized + path.substr(packageLength);
    }
    loader.packageConfigPaths = packageConfigPaths;
  }

  if (cfg.bundles) {
    for (var p in cfg.bundles) {
      var bundle = [];
      for (var i = 0; i < cfg.bundles[p].length; i++) {
        var defaultJSExtension = loader.defaultJSExtensions && cfg.bundles[p][i].substr(cfg.bundles[p][i].length - 3, 3) != '.js';
        var normalizedBundleDep = loader.decanonicalize(cfg.bundles[p][i]);
        if (defaultJSExtension && normalizedBundleDep.substr(normalizedBundleDep.length - 3, 3) == '.js')
          normalizedBundleDep = normalizedBundleDep.substr(0, normalizedBundleDep.length - 3);
        bundle.push(normalizedBundleDep);
      }
      loader.bundles[p] = bundle;
    }
  }

  if (cfg.packages) {
    for (var p in cfg.packages) {
      if (p.match(/^([^\/]+:)?\/\/$/))
        throw new TypeError('"' + p + '" is not a valid package name.');

      var prop = coreResolve.call(loader, p);

      // allow trailing slash in packages
      if (prop[prop.length - 1] == '/')
        prop = prop.substr(0, prop.length - 1);

      setPkgConfig(loader, prop, cfg.packages[p], false);
    }
  }

  for (var c in cfg) {
    var v = cfg[c];

    if (indexOf.call(['baseURL', 'map', 'packages', 'bundles', 'paths', 'warnings', 'packageConfigPaths',
          'loaderErrorStack', 'browserConfig', 'nodeConfig', 'devConfig', 'buildConfig', 'productionConfig'], c) != -1)
      continue;

    if (typeof v != 'object' || v instanceof Array) {
      loader[c] = v;
    }
    else {
      loader[c] = loader[c] || {};

      for (var p in v) {
        // base-level wildcard meta does not normalize to retain catch-all quality
        if (c == 'meta' && p[0] == '*') {
          extend(loader[c][p] = loader[c][p] || {}, v[p]);
        }
        else if (c == 'meta') {
          // meta can go through global map, with defaultJSExtensions adding
          var resolved = coreResolve.call(loader, p);
          if (loader.defaultJSExtensions && resolved.substr(resolved.length - 3, 3) != '.js' && !isPlain(resolved))
            resolved += '.js';
          extend(loader[c][resolved] = loader[c][resolved] || {}, v[p]);
        }
        else if (c == 'depCache') {
          var defaultJSExtension = loader.defaultJSExtensions && p.substr(p.length - 3, 3) != '.js';
          var prop = loader.decanonicalize(p);
          if (defaultJSExtension && prop.substr(prop.length - 3, 3) == '.js')
            prop = prop.substr(0, prop.length - 3);
          loader[c][prop] = [].concat(v[p]);
        }
        else {
          loader[c][p] = v[p];
        }
      }
    }
  }

  envSet(loader, cfg, function(cfg) {
    loader.config(cfg, true);
  });
};
/*
 * Package Configuration Extension
 *
 * Example:
 *
 * SystemJS.packages = {
 *   jquery: {
 *     main: 'index.js', // when not set, package name is requested directly
 *     format: 'amd',
 *     defaultExtension: 'ts', // defaults to 'js', can be set to false
 *     modules: {
 *       '*.ts': {
 *         loader: 'typescript'
 *       },
 *       'vendor/sizzle.js': {
 *         format: 'global'
 *       }
 *     },
 *     map: {
 *        // map internal require('sizzle') to local require('./vendor/sizzle')
 *        sizzle: './vendor/sizzle.js',
 *        // map any internal or external require of 'jquery/vendor/another' to 'another/index.js'
 *        './vendor/another.js': './another/index.js',
 *        // test.js / test -> lib/test.js
 *        './test.js': './lib/test.js',
 *
 *        // environment-specific map configurations
 *        './index.js': {
 *          '~browser': './index-node.js',
 *          './custom-condition.js|~export': './index-custom.js'
 *        }
 *     },
 *     // allows for setting package-prefixed depCache
 *     // keys are normalized module names relative to the package itself
 *     depCache: {
 *       // import 'package/index.js' loads in parallel package/lib/test.js,package/vendor/sizzle.js
 *       './index.js': ['./test'],
 *       './test.js': ['external-dep'],
 *       'external-dep/path.js': ['./another.js']
 *     }
 *   }
 * };
 *
 * Then:
 *   import 'jquery'                       -> jquery/index.js
 *   import 'jquery/submodule'             -> jquery/submodule.js
 *   import 'jquery/submodule.ts'          -> jquery/submodule.ts loaded as typescript
 *   import 'jquery/vendor/another'        -> another/index.js
 *
 * Detailed Behaviours
 * - main can have a leading "./" can be added optionally
 * - map and defaultExtension are applied to the main
 * - defaultExtension adds the extension only if the exact extension is not present
 * - defaultJSExtensions applies after map when defaultExtension is not set
 * - if a meta value is available for a module, map and defaultExtension are skipped
 * - like global map, package map also applies to subpaths (sizzle/x, ./vendor/another/sub)
 * - condition module map is '@env' module in package or '@system-env' globally
 * - map targets support conditional interpolation ('./x': './x.#{|env}.js')
 * - internal package map targets cannot use boolean conditionals
 *
 * Package Configuration Loading
 *
 * Not all packages may already have their configuration present in the System config
 * For these cases, a list of packageConfigPaths can be provided, which when matched against
 * a request, will first request a ".json" file by the package name to derive the package
 * configuration from. This allows dynamic loading of non-predetermined code, a key use
 * case in SystemJS.
 *
 * Example:
 *
 *   SystemJS.packageConfigPaths = ['packages/test/package.json', 'packages/*.json'];
 *
 *   // will first request 'packages/new-package/package.json' for the package config
 *   // before completing the package request to 'packages/new-package/path'
 *   SystemJS.import('packages/new-package/path');
 *
 *   // will first request 'packages/test/package.json' before the main
 *   SystemJS.import('packages/test');
 *
 * When a package matches packageConfigPaths, it will always send a config request for
 * the package configuration.
 * The package name itself is taken to be the match up to and including the last wildcard
 * or trailing slash.
 * The most specific package config path will be used.
 * Any existing package configurations for the package will deeply merge with the
 * package config, with the existing package configurations taking preference.
 * To opt-out of the package configuration request for a package that matches
 * packageConfigPaths, use the { configured: true } package config option.
 *
 */
(function() {

  hookConstructor(function(constructor) {
    return function() {
      constructor.call(this);
      this.packages = {};
      this.packageConfigPaths = [];
    };
  });

  function getPackage(loader, normalized) {
    // use most specific package
    var curPkg, curPkgLen = 0, pkgLen;
    for (var p in loader.packages) {
      if (normalized.substr(0, p.length) === p && (normalized.length === p.length || normalized[p.length] === '/')) {
        pkgLen = p.split('/').length;
        if (pkgLen > curPkgLen) {
          curPkg = p;
          curPkgLen = pkgLen;
        }
      }
    }
    return curPkg;
  }

  function addDefaultExtension(loader, pkg, pkgName, subPath, skipExtensions) {
    // don't apply extensions to folders or if defaultExtension = false
    if (!subPath || subPath[subPath.length - 1] == '/' || skipExtensions || pkg.defaultExtension === false)
      return subPath;

    var metaMatch = false;

    // exact meta or meta with any content after the last wildcard skips extension
    if (pkg.meta)
      getMetaMatches(pkg.meta, subPath, function(metaPattern, matchMeta, matchDepth) {
        if (matchDepth == 0 || metaPattern.lastIndexOf('*') != metaPattern.length - 1)
          return metaMatch = true;
      });

    // exact global meta or meta with any content after the last wildcard skips extension
    if (!metaMatch && loader.meta)
      getMetaMatches(loader.meta, pkgName + '/' + subPath, function(metaPattern, matchMeta, matchDepth) {
        if (matchDepth == 0 || metaPattern.lastIndexOf('*') != metaPattern.length - 1)
          return metaMatch = true;
      });

    if (metaMatch)
      return subPath;

    // work out what the defaultExtension is and add if not there already
    // NB reconsider if default should really be ".js"?
    var defaultExtension = '.' + (pkg.defaultExtension || 'js');
    if (subPath.substr(subPath.length - defaultExtension.length) != defaultExtension)
      return subPath + defaultExtension;
    else
      return subPath;
  }

  function applyPackageConfigSync(loader, pkg, pkgName, subPath, skipExtensions) {
    // main
    if (!subPath) {
      if (pkg.main)
        subPath = pkg.main.substr(0, 2) == './' ? pkg.main.substr(2) : pkg.main;
      // also no submap if name is package itself (import 'pkg' -> 'path/to/pkg.js')
      else
        // NB can add a default package main convention here when defaultJSExtensions is deprecated
        // if it becomes internal to the package then it would no longer be an exit path
        return pkgName + (loader.defaultJSExtensions ? '.js' : '');
    }

    // map config checking without then with extensions
    if (pkg.map) {
      var mapPath = './' + subPath;

      var mapMatch = getMapMatch(pkg.map, mapPath);

      // we then check map with the default extension adding
      if (!mapMatch) {
        mapPath = './' + addDefaultExtension(loader, pkg, pkgName, subPath, skipExtensions);
        if (mapPath != './' + subPath)
          mapMatch = getMapMatch(pkg.map, mapPath);
      }
      if (mapMatch) {
        var mapped = doMapSync(loader, pkg, pkgName, mapMatch, mapPath, skipExtensions);
        if (mapped)
          return mapped;
      }
    }

    // normal package resolution
    return pkgName + '/' + addDefaultExtension(loader, pkg, pkgName, subPath, skipExtensions);
  }

  function validMapping(mapMatch, mapped, pkgName, path) {
    // disallow internal to subpath maps
    if (mapMatch == '.')
      throw new Error('Package ' + pkgName + ' has a map entry for "." which is not permitted.');
    
    // allow internal ./x -> ./x/y or ./x/ -> ./x/y recursive maps
    // but only if the path is exactly ./x and not ./x/z
    if (mapped.substr(0, mapMatch.length) == mapMatch && path.length > mapMatch.length)
      return false;

    return true;
  }

  function doMapSync(loader, pkg, pkgName, mapMatch, path, skipExtensions) {
    if (path[path.length - 1] == '/')
      path = path.substr(0, path.length - 1);
    var mapped = pkg.map[mapMatch];

    if (typeof mapped == 'object')
      throw new Error('Synchronous conditional normalization not supported sync normalizing ' + mapMatch + ' in ' + pkgName);

    if (!validMapping(mapMatch, mapped, pkgName, path) || typeof mapped != 'string')
      return;

    // package map to main / base-level
    if (mapped == '.')
      mapped = pkgName;

    // internal package map
    else if (mapped.substr(0, 2) == './')
      return pkgName + '/' + addDefaultExtension(loader, pkg, pkgName, mapped.substr(2) + path.substr(mapMatch.length), skipExtensions);
    
    // external map reference
    return loader.normalizeSync(mapped + path.substr(mapMatch.length), pkgName + '/');
  }

  function applyPackageConfig(loader, pkg, pkgName, subPath, skipExtensions) {
    // main
    if (!subPath) {
      if (pkg.main)
        subPath = pkg.main.substr(0, 2) == './' ? pkg.main.substr(2) : pkg.main;
      // also no submap if name is package itself (import 'pkg' -> 'path/to/pkg.js')
      else
        // NB can add a default package main convention here when defaultJSExtensions is deprecated
        // if it becomes internal to the package then it would no longer be an exit path
        return Promise.resolve(pkgName + (loader.defaultJSExtensions ? '.js' : ''));
    }

    // map config checking without then with extensions
    var mapPath, mapMatch;

    if (pkg.map) {
      mapPath = './' + subPath;
      mapMatch = getMapMatch(pkg.map, mapPath);

      // we then check map with the default extension adding
      if (!mapMatch) {
        mapPath = './' + addDefaultExtension(loader, pkg, pkgName, subPath, skipExtensions);
        if (mapPath != './' + subPath)
          mapMatch = getMapMatch(pkg.map, mapPath);
      }
    }

    return (mapMatch ? doMap(loader, pkg, pkgName, mapMatch, mapPath, skipExtensions) : Promise.resolve())
    .then(function(mapped) {
      if (mapped)
        return Promise.resolve(mapped);

      // normal package resolution / fallback resolution for no conditional match
      return Promise.resolve(pkgName + '/' + addDefaultExtension(loader, pkg, pkgName, subPath, skipExtensions));
    });
  }

  function doStringMap(loader, pkg, pkgName, mapMatch, mapped, path, skipExtensions) {
    // NB the interpolation cases should strictly skip subsequent interpolation
    // package map to main / base-level
    if (mapped == '.')
      mapped = pkgName;
    
    // internal package map
    else if (mapped.substr(0, 2) == './')
      return Promise.resolve(pkgName + '/' + addDefaultExtension(loader, pkg, pkgName, mapped.substr(2) + path.substr(mapMatch.length), skipExtensions))
      .then(function(name) {
        return interpolateConditional.call(loader, name, pkgName + '/');
      });
    
    // external map reference
    return loader.normalize(mapped + path.substr(mapMatch.length), pkgName + '/');
  }

  function doMap(loader, pkg, pkgName, mapMatch, path, skipExtensions) {
    if (path[path.length - 1] == '/')
      path = path.substr(0, path.length - 1);

    var mapped = pkg.map[mapMatch];

    if (typeof mapped == 'string') {
      if (!validMapping(mapMatch, mapped, pkgName, path))
        return Promise.resolve();
      return doStringMap(loader, pkg, pkgName, mapMatch, mapped, path, skipExtensions);
    }

    // we use a special conditional syntax to allow the builder to handle conditional branch points further
    if (loader.builder)
      return Promise.resolve(pkgName + '/#:' + path);

    // we load all conditions upfront
    var conditionPromises = [];
    var conditions = [];
    for (var e in mapped) {
      var c = parseCondition(e);
      conditions.push({
        condition: c,
        map: mapped[e]
      });
      conditionPromises.push(loader['import'](c.module, pkgName));
    }

    // map object -> conditional map
    return Promise.all(conditionPromises)
    .then(function(conditionValues) {
      // first map condition to match is used
      for (var i = 0; i < conditions.length; i++) {
        var c = conditions[i].condition;
        var value = readMemberExpression(c.prop, conditionValues[i]);
        if (!c.negate && value || c.negate && !value)
          return conditions[i].map;
      }
    })
    .then(function(mapped) {
      if (mapped) {
        if (!validMapping(mapMatch, mapped, pkgName, path))
          return;
        return doStringMap(loader, pkg, pkgName, mapMatch, mapped, path, skipExtensions);
      }

      // no environment match -> fallback to original subPath by returning undefined
    });
  }

  // normalizeSync = decanonicalize + package resolution
  SystemJSLoader.prototype.normalizeSync = SystemJSLoader.prototype.decanonicalize = SystemJSLoader.prototype.normalize;

  // decanonicalize must JUST handle package defaultExtension: false case when defaultJSExtensions is set
  // to be deprecated!
  hook('decanonicalize', function(decanonicalize) {
    return function(name, parentName) {
      if (this.builder)
        return decanonicalize.call(this, name, parentName, true);

      var decanonicalized = decanonicalize.call(this, name, parentName, false);

      if (!this.defaultJSExtensions)
        return decanonicalized;
    
      var pkgName = getPackage(this, decanonicalized);

      var pkg = this.packages[pkgName];
      var defaultExtension = pkg && pkg.defaultExtension;

      if (defaultExtension == undefined && pkg && pkg.meta)
        getMetaMatches(pkg.meta, decanonicalized.substr(pkgName), function(metaPattern, matchMeta, matchDepth) {
          if (matchDepth == 0 || metaPattern.lastIndexOf('*') != metaPattern.length - 1) {
            defaultExtension = false;
            return true;
          }
        });
      
      if ((defaultExtension === false || defaultExtension && defaultExtension != '.js') && name.substr(name.length - 3, 3) != '.js' && decanonicalized.substr(decanonicalized.length - 3, 3) == '.js')
        decanonicalized = decanonicalized.substr(0, decanonicalized.length - 3);

      return decanonicalized;
    };
  });

  hook('normalizeSync', function(normalizeSync) {
    return function(name, parentName, isPlugin) {
      var loader = this;
      isPlugin = isPlugin === true;

      // apply contextual package map first
      // (we assume the parent package config has already been loaded)
      if (parentName)
        var parentPackageName = getPackage(loader, parentName) ||
            loader.defaultJSExtensions && parentName.substr(parentName.length - 3, 3) == '.js' &&
            getPackage(loader, parentName.substr(0, parentName.length - 3));

      var parentPackage = parentPackageName && loader.packages[parentPackageName];

      // ignore . since internal maps handled by standard package resolution
      if (parentPackage && name[0] != '.') {
        var parentMap = parentPackage.map;
        var parentMapMatch = parentMap && getMapMatch(parentMap, name);

        if (parentMapMatch && typeof parentMap[parentMapMatch] == 'string') {
          var mapped = doMapSync(loader, parentPackage, parentPackageName, parentMapMatch, name, isPlugin);      
          if (mapped)
            return mapped;
        }
      }

      var defaultJSExtension = loader.defaultJSExtensions && name.substr(name.length - 3, 3) != '.js';

      // apply map, core, paths, contextual package map
      var normalized = normalizeSync.call(loader, name, parentName, false);

      // undo defaultJSExtension
      if (defaultJSExtension && normalized.substr(normalized.length - 3, 3) != '.js')
        defaultJSExtension = false;
      if (defaultJSExtension)
        normalized = normalized.substr(0, normalized.length - 3);

      var pkgConfigMatch = getPackageConfigMatch(loader, normalized);
      var pkgName = pkgConfigMatch && pkgConfigMatch.packageName || getPackage(loader, normalized);

      if (!pkgName)
        return normalized + (defaultJSExtension ? '.js' : '');

      var subPath = normalized.substr(pkgName.length + 1);

      return applyPackageConfigSync(loader, loader.packages[pkgName] || {}, pkgName, subPath, isPlugin);
    };
  });

  hook('normalize', function(normalize) {
    return function(name, parentName, isPlugin) {
      var loader = this;
      isPlugin = isPlugin === true;

      return Promise.resolve()
      .then(function() {
        // apply contextual package map first
        // (we assume the parent package config has already been loaded)
        if (parentName)
          var parentPackageName = getPackage(loader, parentName) ||
              loader.defaultJSExtensions && parentName.substr(parentName.length - 3, 3) == '.js' &&
              getPackage(loader, parentName.substr(0, parentName.length - 3));

        var parentPackage = parentPackageName && loader.packages[parentPackageName];

        // ignore . since internal maps handled by standard package resolution
        if (parentPackage && name.substr(0, 2) != './') {
          var parentMap = parentPackage.map;
          var parentMapMatch = parentMap && getMapMatch(parentMap, name);

          if (parentMapMatch)
            return doMap(loader, parentPackage, parentPackageName, parentMapMatch, name, isPlugin);
        }

        return Promise.resolve();
      })
      .then(function(mapped) {
        if (mapped)
          return mapped;

        var defaultJSExtension = loader.defaultJSExtensions && name.substr(name.length - 3, 3) != '.js';

        // apply map, core, paths, contextual package map
        var normalized = normalize.call(loader, name, parentName, false);

        // undo defaultJSExtension
        if (defaultJSExtension && normalized.substr(normalized.length - 3, 3) != '.js')
          defaultJSExtension = false;
        if (defaultJSExtension)
          normalized = normalized.substr(0, normalized.length - 3);

        var pkgConfigMatch = getPackageConfigMatch(loader, normalized);
        var pkgName = pkgConfigMatch && pkgConfigMatch.packageName || getPackage(loader, normalized);

        if (!pkgName)
          return Promise.resolve(normalized + (defaultJSExtension ? '.js' : ''));

        var pkg = loader.packages[pkgName];

        // if package is already configured or not a dynamic config package, use existing package config
        var isConfigured = pkg && (pkg.configured || !pkgConfigMatch);
        return (isConfigured ? Promise.resolve(pkg) : loadPackageConfigPath(loader, pkgName, pkgConfigMatch.configPath))
        .then(function(pkg) {
          var subPath = normalized.substr(pkgName.length + 1);

          return applyPackageConfig(loader, pkg, pkgName, subPath, isPlugin);
        });
      });
    };
  });

  // check if the given normalized name matches a packageConfigPath
  // if so, loads the config
  var packageConfigPaths = {};

  // data object for quick checks against package paths
  function createPkgConfigPathObj(path) {
    var lastWildcard = path.lastIndexOf('*');
    var length = Math.max(lastWildcard + 1, path.lastIndexOf('/'));
    return {
      length: length,
      regEx: new RegExp('^(' + path.substr(0, length).replace(/[.+?^${}()|[\]\\]/g, '\\$&').replace(/\*/g, '[^\\/]+') + ')(\\/|$)'),
      wildcard: lastWildcard != -1
    };
  }

  // most specific match wins
  function getPackageConfigMatch(loader, normalized) {
    var pkgName, exactMatch = false, configPath;
    for (var i = 0; i < loader.packageConfigPaths.length; i++) {
      var packageConfigPath = loader.packageConfigPaths[i];
      var p = packageConfigPaths[packageConfigPath] || (packageConfigPaths[packageConfigPath] = createPkgConfigPathObj(packageConfigPath));
      if (normalized.length < p.length)
        continue;
      var match = normalized.match(p.regEx);
      if (match && (!pkgName || (!(exactMatch && p.wildcard) && pkgName.length < match[1].length))) {
        pkgName = match[1];
        exactMatch = !p.wildcard;
        configPath = pkgName + packageConfigPath.substr(p.length);
      }
    }

    if (!pkgName)
      return;

    return {
      packageName: pkgName,
      configPath: configPath
    };
  }

  function loadPackageConfigPath(loader, pkgName, pkgConfigPath) {
    var configLoader = loader.pluginLoader || loader;

    // NB remove this when json is default
    (configLoader.meta[pkgConfigPath] = configLoader.meta[pkgConfigPath] || {}).format = 'json';
    configLoader.meta[pkgConfigPath].loader = null;

    return configLoader.load(pkgConfigPath)
    .then(function() {
      var cfg = configLoader.get(pkgConfigPath)['default'];

      // support "systemjs" prefixing
      if (cfg.systemjs)
        cfg = cfg.systemjs;

      // modules backwards compatibility
      if (cfg.modules) {
        cfg.meta = cfg.modules;
        warn.call(loader, 'Package config file ' + pkgConfigPath + ' is configured with "modules", which is deprecated as it has been renamed to "meta".');
      }

      return setPkgConfig(loader, pkgName, cfg, true);
    });
  }

  function getMetaMatches(pkgMeta, subPath, matchFn) {
    // wildcard meta
    var meta = {};
    var wildcardIndex;
    for (var module in pkgMeta) {
      // allow meta to start with ./ for flexibility
      var dotRel = module.substr(0, 2) == './' ? './' : '';
      if (dotRel)
        module = module.substr(2);

      wildcardIndex = module.indexOf('*');
      if (wildcardIndex === -1)
        continue;

      if (module.substr(0, wildcardIndex) == subPath.substr(0, wildcardIndex)
          && module.substr(wildcardIndex + 1) == subPath.substr(subPath.length - module.length + wildcardIndex + 1)) {
        // alow match function to return true for an exit path
        if (matchFn(module, pkgMeta[dotRel + module], module.split('/').length))
          return;
      }
    }
    // exact meta
    var exactMeta = pkgMeta[subPath] && pkgMeta.hasOwnProperty && pkgMeta.hasOwnProperty(subPath) ? pkgMeta[subPath] : pkgMeta['./' + subPath];
    if (exactMeta)
      matchFn(exactMeta, exactMeta, 0);
  }

  hook('locate', function(locate) {
    return function(load) {
      var loader = this;
      return Promise.resolve(locate.call(this, load))
      .then(function(address) {
        var pkgName = getPackage(loader, load.name);
        if (pkgName) {
          var pkg = loader.packages[pkgName];
          var subPath = load.name.substr(pkgName.length + 1);

          var meta = {};
          if (pkg.meta) {
            var bestDepth = 0;

            // NB support a main shorthand in meta here?
            getMetaMatches(pkg.meta, subPath, function(metaPattern, matchMeta, matchDepth) {
              if (matchDepth > bestDepth)
                bestDepth = matchDepth;
              extendMeta(meta, matchMeta, matchDepth && bestDepth > matchDepth);
            });

            extendMeta(load.metadata, meta);
          }

          // format
          if (pkg.format && !load.metadata.loader)
            load.metadata.format = load.metadata.format || pkg.format;
        }

        return address;
      });
    };
  });

})();
/*
 * Script tag fetch
 *
 * When load.metadata.scriptLoad is true, we load via script tag injection.
 */
(function() {

  if (typeof document != 'undefined')
    var head = document.getElementsByTagName('head')[0];

  var curSystem;
  var curRequire;

  // if doing worker executing, this is set to the load record being executed
  var workerLoad = null;
  
  // interactive mode handling method courtesy RequireJS
  var ieEvents = head && (function() {
    var s = document.createElement('script');
    var isOpera = typeof opera !== 'undefined' && opera.toString() === '[object Opera]';
    return s.attachEvent && !(s.attachEvent.toString && s.attachEvent.toString().indexOf('[native code') < 0) && !isOpera;
  })();

  // IE interactive-only part
  // we store loading scripts array as { script: <script>, load: {...} }
  var interactiveLoadingScripts = [];
  var interactiveScript;
  function getInteractiveScriptLoad() {
    if (interactiveScript && interactiveScript.script.readyState === 'interactive')
      return interactiveScript.load;

    for (var i = 0; i < interactiveLoadingScripts.length; i++)
      if (interactiveLoadingScripts[i].script.readyState == 'interactive') {
        interactiveScript = interactiveLoadingScripts[i];
        return interactiveScript.load;
      }
  }
  
  // System.register, System.registerDynamic, AMD define pipeline
  // this is called by the above methods when they execute
  // we then run the reduceRegister_ collection function either immediately
  // if we are in IE and know the currently executing script (interactive)
  // or later if we need to wait for the synchronous load callback to know the script
  var loadingCnt = 0;
  var registerQueue = [];
  hook('pushRegister_', function(pushRegister) {
    return function(register) {
      // if using eval-execution then skip
      if (pushRegister.call(this, register))
        return false;

      // if using worker execution, then we're done
      if (workerLoad)
        this.reduceRegister_(workerLoad, register);

      // detect if we know the currently executing load (IE)
      // if so, immediately call reduceRegister
      else if (ieEvents)
        this.reduceRegister_(getInteractiveScriptLoad(), register);

      // otherwise, add to our execution queue
      // to call reduceRegister on sync script load event
      else if (loadingCnt)
        registerQueue.push(register);

      // if we're not currently loading anything though
      // then do the reduction against a null load
      // (out of band named define or named register)
      // note even in non-script environments, this catch is used
      else
        this.reduceRegister_(null, register);

      return true;
    };
  });

  function webWorkerImport(loader, load) {
    return new Promise(function(resolve, reject) {
      if (load.metadata.integrity)
        reject(new Error('Subresource integrity checking is not supported in web workers.'));

      workerLoad = load;
      try {
        importScripts(load.address);
      }
      catch(e) {
        workerLoad = null;
        reject(e);
      }
      workerLoad = null;

      // if nothing registered, then something went wrong
      if (!load.metadata.entry)
        reject(new Error(load.address + ' did not call System.register or AMD define. If loading a global, ensure the meta format is set to global.'));

      resolve('');
    });
  }

  // override fetch to use script injection
  hook('fetch', function(fetch) {
    return function(load) {
      var loader = this;

      if (load.metadata.format == 'json' || !load.metadata.scriptLoad || (!isBrowser && !isWorker))
        return fetch.call(this, load);

      if (isWorker)
        return webWorkerImport(loader, load);

      return new Promise(function(resolve, reject) {
        var s = document.createElement('script');
        
        s.async = true;

        if (load.metadata.crossOrigin)
          s.crossOrigin = load.metadata.crossOrigin;

        if (load.metadata.integrity)
          s.setAttribute('integrity', load.metadata.integrity);

        if (ieEvents) {
          s.attachEvent('onreadystatechange', complete);
          interactiveLoadingScripts.push({
            script: s,
            load: load
          });
        }
        else {
          s.addEventListener('load', complete, false);
          s.addEventListener('error', error, false);
        }

        loadingCnt++;

        curSystem = __global.System;
        curRequire = __global.require;

        s.src = load.address;
        head.appendChild(s);

        function complete(evt) {
          if (s.readyState && s.readyState != 'loaded' && s.readyState != 'complete')
            return;

          loadingCnt--;

          // complete call is sync on execution finish
          // (in ie already done reductions)
          if (!load.metadata.entry && !registerQueue.length) {
            loader.reduceRegister_(load);
          }
          else if (!ieEvents) {
            for (var i = 0; i < registerQueue.length; i++)
              loader.reduceRegister_(load, registerQueue[i]);
            registerQueue = [];
          }

          cleanup();

          // if nothing registered, then something went wrong
          if (!load.metadata.entry && !load.metadata.bundle)
            reject(new Error(load.name + ' did not call System.register or AMD define. If loading a global module configure the global name via the meta exports property for script injection support.'));

          resolve('');
        }

        function error(evt) {
          cleanup();
          reject(new Error('Unable to load script ' + load.address));
        }

        function cleanup() {
          __global.System = curSystem;
          __global.require = curRequire;

          if (s.detachEvent) {
            s.detachEvent('onreadystatechange', complete);
            for (var i = 0; i < interactiveLoadingScripts.length; i++)
              if (interactiveLoadingScripts[i].script == s) {
                if (interactiveScript && interactiveScript.script == s)
                  interactiveScript = null;
                interactiveLoadingScripts.splice(i, 1);
              }
          }
          else {
            s.removeEventListener('load', complete, false);
            s.removeEventListener('error', error, false);
          }

          head.removeChild(s);
        }
      });
    };
  });
})();
/*
 * Instantiate registry extension
 *
 * Supports Traceur System.register 'instantiate' output for loading ES6 as ES5.
 *
 * - Creates the loader.register function
 * - Also supports metadata.format = 'register' in instantiate for anonymous register modules
 * - Also supports metadata.deps, metadata.execute and metadata.executingRequire
 *     for handling dynamic modules alongside register-transformed ES6 modules
 *
 *
 * The code here replicates the ES6 linking groups algorithm to ensure that
 * circular ES6 compiled into System.register can work alongside circular AMD 
 * and CommonJS, identically to the actual ES6 loader.
 *
 */


/*
 * Registry side table entries in loader.defined
 * Registry Entry Contains:
 *    - name
 *    - deps 
 *    - declare for declarative modules
 *    - execute for dynamic modules, different to declarative execute on module
 *    - executingRequire indicates require drives execution for circularity of dynamic modules
 *    - declarative optional boolean indicating which of the above
 *
 * Can preload modules directly on SystemJS.defined['my/module'] = { deps, execute, executingRequire }
 *
 * Then the entry gets populated with derived information during processing:
 *    - normalizedDeps derived from deps, created in instantiate
 *    - groupIndex used by group linking algorithm
 *    - evaluated indicating whether evaluation has happend
 *    - module the module record object, containing:
 *      - exports actual module exports
 *
 *    For dynamic we track the es module with:
 *    - esModule actual es module value
 *    - esmExports whether to extend the esModule with named exports
 *      
 *    Then for declarative only we track dynamic bindings with the 'module' records:
 *      - name
 *      - exports
 *      - setters declarative setter functions
 *      - dependencies, module records of dependencies
 *      - importers, module records of dependents
 *
 * After linked and evaluated, entries are removed, declarative module records remain in separate
 * module binding table
 *
 */

var leadingCommentAndMetaRegEx = /^(\s*\/\*[^\*]*(\*(?!\/)[^\*]*)*\*\/|\s*\/\/[^\n]*|\s*"[^"]+"\s*;?|\s*'[^']+'\s*;?)*\s*/;
function detectRegisterFormat(source) {
  var leadingCommentAndMeta = source.match(leadingCommentAndMetaRegEx);
  return leadingCommentAndMeta && source.substr(leadingCommentAndMeta[0].length, 15) == 'System.register';
}

function createEntry() {
  return {
    name: null,
    deps: null,
    originalIndices: null,
    declare: null,
    execute: null,
    executingRequire: false,
    declarative: false,
    normalizedDeps: null,
    groupIndex: null,
    evaluated: false,
    module: null,
    esModule: null,
    esmExports: false
  };
}

(function() {

  /*
   * There are two variations of System.register:
   * 1. System.register for ES6 conversion (2-3 params) - System.register([name, ]deps, declare)
   *    see https://github.com/ModuleLoader/es6-module-loader/wiki/System.register-Explained
   *
   * 2. System.registerDynamic for dynamic modules (3-4 params) - System.registerDynamic([name, ]deps, executingRequire, execute)
   * the true or false statement 
   *
   * this extension implements the linking algorithm for the two variations identical to the spec
   * allowing compiled ES6 circular references to work alongside AMD and CJS circular references.
   *
   */
  SystemJSLoader.prototype.register = function(name, deps, declare) {
    if (typeof name != 'string') {
      declare = deps;
      deps = name;
      name = null;
    }

    // dynamic backwards-compatibility
    // can be deprecated eventually
    if (typeof declare == 'boolean')
      return this.registerDynamic.apply(this, arguments);

    var entry = createEntry();
    // ideally wouldn't apply map config to bundle names but 
    // dependencies go through map regardless so we can't restrict
    // could reconsider in shift to new spec
    entry.name = name && (this.decanonicalize || this.normalize).call(this, name);
    entry.declarative = true;
    entry.deps = deps;
    entry.declare = declare;

    this.pushRegister_({
      amd: false,
      entry: entry
    });
  };
  SystemJSLoader.prototype.registerDynamic = function(name, deps, declare, execute) {
    if (typeof name != 'string') {
      execute = declare;
      declare = deps;
      deps = name;
      name = null;
    }

    // dynamic
    var entry = createEntry();
    entry.name = name && (this.decanonicalize || this.normalize).call(this, name);
    entry.deps = deps;
    entry.execute = execute;
    entry.executingRequire = declare;

    this.pushRegister_({
      amd: false,
      entry: entry
    });
  };
  hook('reduceRegister_', function() {
    return function(load, register) {
      if (!register)
        return;

      var entry = register.entry;
      var curMeta = load && load.metadata;

      // named register
      if (entry.name) {
        if (!(entry.name in this.defined))
          this.defined[entry.name] = entry;

        if (curMeta)
          curMeta.bundle = true;
      }
      // anonymous register
      if (!entry.name || load && !curMeta.entry && entry.name == load.name) {
        if (!curMeta)
          throw new TypeError('Invalid System.register call. Anonymous System.register calls can only be made by modules loaded by SystemJS.import and not via script tags.');
        if (curMeta.entry) {
          if (curMeta.format == 'register')
            throw new Error('Multiple anonymous System.register calls in module ' + load.name + '. If loading a bundle, ensure all the System.register calls are named.');
          else
            throw new Error('Module ' + load.name + ' interpreted as ' + curMeta.format + ' module format, but called System.register.');
        }
        if (!curMeta.format)
          curMeta.format = 'register';
        curMeta.entry = entry;
      }
    };
  });

  hookConstructor(function(constructor) {
    return function() {
      constructor.call(this);

      this.defined = {};
      this._loader.moduleRecords = {};
    };
  });

  function buildGroups(entry, loader, groups) {
    groups[entry.groupIndex] = groups[entry.groupIndex] || [];

    if (indexOf.call(groups[entry.groupIndex], entry) != -1)
      return;

    groups[entry.groupIndex].push(entry);

    for (var i = 0, l = entry.normalizedDeps.length; i < l; i++) {
      var depName = entry.normalizedDeps[i];
      var depEntry = loader.defined[depName];
      
      // not in the registry means already linked / ES6
      if (!depEntry || depEntry.evaluated)
        continue;
      
      // now we know the entry is in our unlinked linkage group
      var depGroupIndex = entry.groupIndex + (depEntry.declarative != entry.declarative);

      // the group index of an entry is always the maximum
      if (depEntry.groupIndex === null || depEntry.groupIndex < depGroupIndex) {
        
        // if already in a group, remove from the old group
        if (depEntry.groupIndex !== null) {
          groups[depEntry.groupIndex].splice(indexOf.call(groups[depEntry.groupIndex], depEntry), 1);

          // if the old group is empty, then we have a mixed depndency cycle
          if (groups[depEntry.groupIndex].length == 0)
            throw new Error("Mixed dependency cycle detected");
        }

        depEntry.groupIndex = depGroupIndex;
      }

      buildGroups(depEntry, loader, groups);
    }
  }

  function link(name, startEntry, loader) {
    // skip if already linked
    if (startEntry.module)
      return;

    startEntry.groupIndex = 0;

    var groups = [];

    buildGroups(startEntry, loader, groups);

    var curGroupDeclarative = !!startEntry.declarative == groups.length % 2;
    for (var i = groups.length - 1; i >= 0; i--) {
      var group = groups[i];
      for (var j = 0; j < group.length; j++) {
        var entry = group[j];

        // link each group
        if (curGroupDeclarative)
          linkDeclarativeModule(entry, loader);
        else
          linkDynamicModule(entry, loader);
      }
      curGroupDeclarative = !curGroupDeclarative; 
    }
  }

  // module binding records
  function ModuleRecord() {}
  defineProperty(ModuleRecord, 'toString', {
    value: function() {
      return 'Module';
    }
  });

  function getOrCreateModuleRecord(name, moduleRecords) {
    return moduleRecords[name] || (moduleRecords[name] = {
      name: name,
      dependencies: [],
      exports: new ModuleRecord(), // start from an empty module and extend
      importers: []
    });
  }

  function linkDeclarativeModule(entry, loader) {
    // only link if already not already started linking (stops at circular)
    if (entry.module)
      return;

    var moduleRecords = loader._loader.moduleRecords;
    var module = entry.module = getOrCreateModuleRecord(entry.name, moduleRecords);
    var exports = entry.module.exports;

    var declaration = entry.declare.call(__global, function(name, value) {
      module.locked = true;

      if (typeof name == 'object') {
        for (var p in name)
          exports[p] = name[p];
      }
      else {
        exports[name] = value;
      }

      for (var i = 0, l = module.importers.length; i < l; i++) {
        var importerModule = module.importers[i];
        if (!importerModule.locked) {
          var importerIndex = indexOf.call(importerModule.dependencies, module);
          var setter = importerModule.setters[importerIndex];
          if (setter)
            setter(exports);
        }
      }

      module.locked = false;
      return value;
    }, { id: entry.name });

    if (typeof declaration == 'function')
      declaration = { setters: [], execute: declaration };

    // allowing undefined declaration was a mistake! To be deprecated.
    declaration = declaration || { setters: [], execute: function() {} };
    
    module.setters = declaration.setters;
    module.execute = declaration.execute;

    if (!module.setters || !module.execute) {
      throw new TypeError('Invalid System.register form for ' + entry.name);
    }

    // now link all the module dependencies
    for (var i = 0, l = entry.normalizedDeps.length; i < l; i++) {
      var depName = entry.normalizedDeps[i];
      var depEntry = loader.defined[depName];
      var depModule = moduleRecords[depName];

      // work out how to set depExports based on scenarios...
      var depExports;

      if (depModule) {
        depExports = depModule.exports;
      }
      // dynamic, already linked in our registry
      else if (depEntry && !depEntry.declarative) {
        depExports = depEntry.esModule;
      }
      // in the loader registry
      else if (!depEntry) {
        depExports = loader.get(depName);
      }
      // we have an entry -> link
      else {
        linkDeclarativeModule(depEntry, loader);
        depModule = depEntry.module;
        depExports = depModule.exports;
      }

      // only declarative modules have dynamic bindings
      if (depModule && depModule.importers) {
        depModule.importers.push(module);
        module.dependencies.push(depModule);
      }
      else {
        module.dependencies.push(null);
      }
      
      // run setters for all entries with the matching dependency name
      var originalIndices = entry.originalIndices[i];
      for (var j = 0, len = originalIndices.length; j < len; ++j) {
        var index = originalIndices[j];
        if (module.setters[index]) {
          module.setters[index](depExports);
        }
      }
    }
  }

  // An analog to loader.get covering execution of all three layers (real declarative, simulated declarative, simulated dynamic)
  function getModule(name, loader) {
    var exports;
    var entry = loader.defined[name];

    if (!entry) {
      exports = loader.get(name);
      if (!exports)
        throw new Error('Unable to load dependency ' + name + '.');
    }

    else {
      if (entry.declarative)
        ensureEvaluated(name, entry, [], loader);
    
      else if (!entry.evaluated)
        linkDynamicModule(entry, loader);

      exports = entry.module.exports;
    }

    if ((!entry || entry.declarative) && exports && exports.__useDefault)
      return exports['default'];
    
    return exports;
  }

  function linkDynamicModule(entry, loader) {
    if (entry.module)
      return;

    var exports = {};

    var module = entry.module = { exports: exports, id: entry.name };

    // AMD requires execute the tree first
    if (!entry.executingRequire) {
      for (var i = 0, l = entry.normalizedDeps.length; i < l; i++) {
        var depName = entry.normalizedDeps[i];
        // we know we only need to link dynamic due to linking algorithm
        var depEntry = loader.defined[depName];
        if (depEntry)
          linkDynamicModule(depEntry, loader);
      }
    }

    // now execute
    entry.evaluated = true;
    var output = entry.execute.call(__global, function(name) {
      for (var i = 0, l = entry.deps.length; i < l; i++) {
        if (entry.deps[i] != name)
          continue;
        return getModule(entry.normalizedDeps[i], loader);
      }
      // try and normalize the dependency to see if we have another form
      var nameNormalized = loader.normalizeSync(name, entry.name);
      if (indexOf.call(entry.normalizedDeps, nameNormalized) != -1)
        return getModule(nameNormalized, loader);

      throw new Error('Module ' + name + ' not declared as a dependency of ' + entry.name);
    }, exports, module);
    
    if (output !== undefined)
      module.exports = output;

    // create the esModule object, which allows ES6 named imports of dynamics
    exports = module.exports;

    // __esModule flag treats as already-named
    if (exports && (exports.__esModule || exports instanceof Module))
      entry.esModule = loader.newModule(exports);
    // set module as 'default' export, then fake named exports by iterating properties
    else if (entry.esmExports && exports !== __global)
      entry.esModule = loader.newModule(getESModule(exports));
    // just use the 'default' export
    else
      entry.esModule = loader.newModule({ 'default': exports, __useDefault: true });
  }

  /*
   * Given a module, and the list of modules for this current branch,
   *  ensure that each of the dependencies of this module is evaluated
   *  (unless one is a circular dependency already in the list of seen
   *  modules, in which case we execute it)
   *
   * Then we evaluate the module itself depth-first left to right 
   * execution to match ES6 modules
   */
  function ensureEvaluated(moduleName, entry, seen, loader) {
    // if already seen, that means it's an already-evaluated non circular dependency
    if (!entry || entry.evaluated || !entry.declarative)
      return;

    // this only applies to declarative modules which late-execute

    seen.push(moduleName);

    for (var i = 0, l = entry.normalizedDeps.length; i < l; i++) {
      var depName = entry.normalizedDeps[i];
      if (indexOf.call(seen, depName) == -1) {
        if (!loader.defined[depName])
          loader.get(depName);
        else
          ensureEvaluated(depName, loader.defined[depName], seen, loader);
      }
    }

    if (entry.evaluated)
      return;

    entry.evaluated = true;
    entry.module.execute.call(__global);
  }

  // override the delete method to also clear the register caches
  hook('delete', function(del) {
    return function(name) {
      delete this._loader.moduleRecords[name];
      delete this.defined[name];
      return del.call(this, name);
    };
  });

  hook('fetch', function(fetch) {
    return function(load) {
      if (this.defined[load.name]) {
        load.metadata.format = 'defined';
        return '';
      }

      load.metadata.deps = load.metadata.deps || [];
      
      return fetch.call(this, load);
    };
  });

  hook('translate', function(translate) {
    // we run the meta detection here (register is after meta)
    return function(load) {
      load.metadata.deps = load.metadata.deps || [];
      return Promise.resolve(translate.apply(this, arguments)).then(function(source) {
        // run detection for register format
        if (load.metadata.format == 'register' || !load.metadata.format && detectRegisterFormat(load.source))
          load.metadata.format = 'register';
        return source;
      });
    };
  });

  // implement a perforance shortpath for System.load with no deps
  hook('load', function(doLoad) {
    return function(normalized) {
      var loader = this;
      var entry = loader.defined[normalized];

      if (!entry || entry.deps.length)
        return doLoad.apply(this, arguments);

      entry.originalIndices = entry.normalizedDeps = [];

      // recursively ensure that the module and all its 
      // dependencies are linked (with dependency group handling)
      link(normalized, entry, loader);

      // now handle dependency execution in correct order
      ensureEvaluated(normalized, entry, [], loader);
      if (!entry.esModule)
        entry.esModule = loader.newModule(entry.module.exports);

      // remove from the registry
      if (!loader.trace)
        loader.defined[normalized] = undefined;

      // return the defined module object
      loader.set(normalized, entry.esModule);

      return Promise.resolve();
    };
  });

  hook('instantiate', function(instantiate) {
    return function(load) {
      if (load.metadata.format == 'detect')
        load.metadata.format = undefined;

      // assumes previous instantiate is sync
      // (core json support)
      instantiate.call(this, load);

      var loader = this;

      var entry;

      // first we check if this module has already been defined in the registry
      if (loader.defined[load.name]) {
        entry = loader.defined[load.name];
        // don't support deps for ES modules
        if (!entry.declarative)
          entry.deps = entry.deps.concat(load.metadata.deps);
        entry.deps = entry.deps.concat(load.metadata.deps);
      }

      // picked up already by an anonymous System.register script injection
      // or via the dynamic formats
      else if (load.metadata.entry) {
        entry = load.metadata.entry;
        entry.deps = entry.deps.concat(load.metadata.deps);
      }

      // Contains System.register calls
      // (dont run bundles in the builder)
      else if (!(loader.builder && load.metadata.bundle) 
          && (load.metadata.format == 'register' || load.metadata.format == 'esm' || load.metadata.format == 'es6')) {
        
        if (typeof __exec != 'undefined')
          __exec.call(loader, load);

        if (!load.metadata.entry && !load.metadata.bundle)
          throw new Error(load.name + ' detected as ' + load.metadata.format + ' but didn\'t execute.');

        entry = load.metadata.entry;

        // support metadata deps for System.register
        if (entry && load.metadata.deps)
          entry.deps = entry.deps.concat(load.metadata.deps);
      }

      // named bundles are just an empty module
      if (!entry) {
        entry = createEntry();
        entry.deps = load.metadata.deps;
        entry.execute = function() {};
      }

      // place this module onto defined for circular references
      loader.defined[load.name] = entry;
      
      var grouped = group(entry.deps);
      
      entry.deps = grouped.names;
      entry.originalIndices = grouped.indices;
      entry.name = load.name;
      entry.esmExports = load.metadata.esmExports !== false;

      // first, normalize all dependencies
      var normalizePromises = [];
      for (var i = 0, l = entry.deps.length; i < l; i++)
        normalizePromises.push(Promise.resolve(loader.normalize(entry.deps[i], load.name)));

      return Promise.all(normalizePromises).then(function(normalizedDeps) {

        entry.normalizedDeps = normalizedDeps;

        return {
          deps: entry.deps,
          execute: function() {
            // recursively ensure that the module and all its 
            // dependencies are linked (with dependency group handling)
            link(load.name, entry, loader);

            // now handle dependency execution in correct order
            ensureEvaluated(load.name, entry, [], loader);

            if (!entry.esModule)
              entry.esModule = loader.newModule(entry.module.exports);

            // remove from the registry
            if (!loader.trace)
              loader.defined[load.name] = undefined;

            // return the defined module object
            return entry.esModule;
          }
        };
      });
    };
  });
})();
/*
 * Extension to detect ES6 and auto-load Traceur or Babel for processing
 */
(function() {
  // good enough ES6 module detection regex - format detections not designed to be accurate, but to handle the 99% use case
  var esmRegEx = /(^\s*|[}\);\n]\s*)(import\s*(['"]|(\*\s+as\s+)?[^"'\(\)\n;]+\s*from\s*['"]|\{)|export\s+\*\s+from\s+["']|export\s*(\{|default|function|class|var|const|let|async\s+function))/;

  var traceurRuntimeRegEx = /\$traceurRuntime\s*\./;
  var babelHelpersRegEx = /babelHelpers\s*\./;

  hook('translate', function(translate) {
    return function(load) {
      var loader = this;
      var args = arguments;
      return translate.apply(loader, args)
      .then(function(source) {
        // detect & transpile ES6
        if (load.metadata.format == 'esm' || load.metadata.format == 'es6' || !load.metadata.format && source.match(esmRegEx)) {
          if (load.metadata.format == 'es6')
            warn.call(loader, 'Module ' + load.name + ' has metadata setting its format to "es6", which is deprecated.\nThis should be updated to "esm".');

          load.metadata.format = 'esm';

          if (load.metadata.deps) {
            var depInject = '';
            for (var i = 0; i < load.metadata.deps.length; i++)
              depInject += 'import "' + load.metadata.deps[i] + '"; ';
            load.source = depInject + source;
          }

          if (loader.transpiler === false) {
            // we accept translation to esm for builds though to enable eg rollup optimizations
            if (loader.builder)
              return source;
            throw new TypeError('Unable to dynamically transpile ES module as SystemJS.transpiler set to false.');
          }

          // setting _loader.loadedTranspiler = false tells the next block to
          // do checks for setting transpiler metadata
          loader._loader.loadedTranspiler = loader._loader.loadedTranspiler || false;
          if (loader.pluginLoader)
            loader.pluginLoader._loader.loadedTranspiler = loader._loader.loadedTranspiler || false;

          // do transpilation
          return (loader._loader.transpilerPromise || (
            loader._loader.transpilerPromise = Promise.resolve(
              __global[loader.transpiler == 'typescript' ? 'ts' : loader.transpiler] || (loader.pluginLoader || loader)['import'](loader.transpiler)
          ))).then(function(transpiler) {
            loader._loader.loadedTranspilerRuntime = true;

            // translate hooks means this is a transpiler plugin instead of a raw implementation
            if (transpiler.translate) {
              // if transpiler is the same as the plugin loader, then don't run twice
              if (transpiler == load.metadata.loaderModule)
                return load.source;

              // convert the source map into an object for transpilation chaining
              if (typeof load.metadata.sourceMap == 'string')
                load.metadata.sourceMap = JSON.parse(load.metadata.sourceMap);

              return Promise.resolve(transpiler.translate.apply(loader, args))
              .then(function(source) {
                // sanitize sourceMap if an object not a JSON string
                var sourceMap = load.metadata.sourceMap;
                if (sourceMap && typeof sourceMap == 'object') {
                  var originalName = load.address.split('!')[0];
                  
                  // force set the filename of the original file
                  if (!sourceMap.file || sourceMap.file == load.address)
                    sourceMap.file = originalName + '!transpiled';

                  // force set the sources list if only one source
                  if (!sourceMap.sources || sourceMap.sources.length <= 1 && (!sourceMap.sources[0] || sourceMap.sources[0] == load.address))
                    sourceMap.sources = [originalName];
                }

                if (load.metadata.format == 'esm' && !loader.builder && detectRegisterFormat(source))
                  load.metadata.format = 'register';
                return source;
              });
            }

            // legacy builder support
            if (loader.builder)
              load.metadata.originalSource = load.source;
            
            // defined in es6-module-loader/src/transpile.js
            return transpile.call(loader, load)
            .then(function(source) {
              // clear sourceMap as transpiler embeds it
              load.metadata.sourceMap = undefined;
              return source;
            });            
          }, function(err) {
            throw addToError(err, 'Unable to load transpiler to transpile ' + load.name);
          });
        }

        // skip transpiler and transpiler runtime loading when transpiler is disabled
        if (loader.transpiler === false)
          return source;

        // load the transpiler correctly
        if (loader._loader.loadedTranspiler === false && (loader.transpiler == 'traceur' || loader.transpiler == 'typescript' || loader.transpiler == 'babel')
            && load.name == loader.normalizeSync(loader.transpiler)) {

          // always load transpiler as a global
          if (source.length > 100 && !load.metadata.format) {
            load.metadata.format = 'global';

            if (loader.transpiler === 'traceur')
              load.metadata.exports = 'traceur';
            if (loader.transpiler === 'typescript')
              load.metadata.exports = 'ts';
          }

          loader._loader.loadedTranspiler = true;
        }

        // load the transpiler runtime correctly
        if (loader._loader.loadedTranspilerRuntime === false) {
          if (load.name == loader.normalizeSync('traceur-runtime')
              || load.name == loader.normalizeSync('babel/external-helpers*')) {
            if (source.length > 100)
              load.metadata.format = load.metadata.format || 'global';

            loader._loader.loadedTranspilerRuntime = true;
          }
        }

        // detect transpiler runtime usage to load runtimes
        if ((load.metadata.format == 'register' || load.metadata.bundle) && loader._loader.loadedTranspilerRuntime !== true) {
          if (loader.transpiler == 'traceur' && !__global.$traceurRuntime && load.source.match(traceurRuntimeRegEx)) {
            loader._loader.loadedTranspilerRuntime = loader._loader.loadedTranspilerRuntime || false;
            return loader['import']('traceur-runtime').then(function() {
              return source;
            });
          }
          if (loader.transpiler == 'babel' && !__global.babelHelpers && load.source.match(babelHelpersRegEx)) {
            loader._loader.loadedTranspilerRuntime = loader._loader.loadedTranspilerRuntime || false;
            return loader['import']('babel/external-helpers').then(function() {
              return source;
            });
          }
        }

        return source;
      });
    };
  });

})();
/*
  SystemJS Global Format

  Supports
    metadata.deps
    metadata.globals
    metadata.exports

  Without metadata.exports, detects writes to the global object.
*/
var __globalName = typeof self != 'undefined' ? 'self' : 'global';

hook('fetch', function(fetch) {
  return function(load) {
    if (load.metadata.exports && !load.metadata.format)
      load.metadata.format = 'global';
    return fetch.call(this, load);
  };
});

// ideally we could support script loading for globals, but the issue with that is that
// we can't do it with AMD support side-by-side since AMD support means defining the
// global define, and global support means not definining it, yet we don't have any hook
// into the "pre-execution" phase of a script tag being loaded to handle both cases
hook('instantiate', function(instantiate) {
  return function(load) {
    var loader = this;

    if (!load.metadata.format)
      load.metadata.format = 'global';

    // global is a fallback module format
    if (load.metadata.format == 'global' && !load.metadata.entry) {

      var entry = createEntry();

      load.metadata.entry = entry;

      entry.deps = [];

      for (var g in load.metadata.globals) {
        var gl = load.metadata.globals[g];
        if (gl)
          entry.deps.push(gl);
      }

      entry.execute = function(require, exports, module) {

        var globals;
        if (load.metadata.globals) {
          globals = {};
          for (var g in load.metadata.globals)
            if (load.metadata.globals[g])
              globals[g] = require(load.metadata.globals[g]);
        }
        
        var exportName = load.metadata.exports;

        if (exportName)
          load.source += '\n' + __globalName + '["' + exportName + '"] = ' + exportName + ';';

        var retrieveGlobal = loader.get('@@global-helpers').prepareGlobal(module.id, exportName, globals, !!load.metadata.encapsulateGlobal);
        __exec.call(loader, load);

        return retrieveGlobal();
      }
    }
    return instantiate.call(this, load);
  };
});


function getGlobalValue(exports) {
  if (typeof exports == 'string')
    return readMemberExpression(exports, __global);

  if (!(exports instanceof Array))
    throw new Error('Global exports must be a string or array.');

  var globalValue = {};
  var first = true;
  for (var i = 0; i < exports.length; i++) {
    var val = readMemberExpression(exports[i], __global);
    if (first) {
      globalValue['default'] = val;
      first = false;
    }
    globalValue[exports[i].split('.').pop()] = val;
  }
  return globalValue;
}

hook('reduceRegister_', function(reduceRegister) {
  return function(load, register) {
    if (register || (!load.metadata.exports && !(isWorker && load.metadata.format == 'global')))
      return reduceRegister.call(this, load, register);

    load.metadata.format = 'global';
    var entry = load.metadata.entry = createEntry();
    entry.deps = load.metadata.deps;
    var globalValue = getGlobalValue(load.metadata.exports);
    entry.execute = function() {
      return globalValue;
    };
  };
});

hookConstructor(function(constructor) {
  return function() {
    var loader = this;
    constructor.call(loader);

    var hasOwnProperty = Object.prototype.hasOwnProperty;

    // bare minimum ignores
    var ignoredGlobalProps = ['_g', 'sessionStorage', 'localStorage', 'clipboardData', 'frames', 'frameElement', 'external', 
      'mozAnimationStartTime', 'webkitStorageInfo', 'webkitIndexedDB', 'mozInnerScreenY', 'mozInnerScreenX'];

    var globalSnapshot;

    function forEachGlobal(callback) {
      if (Object.keys)
        Object.keys(__global).forEach(callback);
      else
        for (var g in __global) {
          if (!hasOwnProperty.call(__global, g))
            continue;
          callback(g);
        }
    }

    function forEachGlobalValue(callback) {
      forEachGlobal(function(globalName) {
        if (indexOf.call(ignoredGlobalProps, globalName) != -1)
          return;
        try {
          var value = __global[globalName];
        }
        catch (e) {
          ignoredGlobalProps.push(globalName);
        }
        callback(globalName, value);
      });
    }

    loader.set('@@global-helpers', loader.newModule({
      prepareGlobal: function(moduleName, exports, globals, encapsulate) {
        // disable module detection
        var curDefine = __global.define;
        
        __global.define = undefined;

        // set globals
        var oldGlobals;
        if (globals) {
          oldGlobals = {};
          for (var g in globals) {
            oldGlobals[g] = __global[g];
            __global[g] = globals[g];
          }
        }

        // store a complete copy of the global object in order to detect changes
        if (!exports) {
          globalSnapshot = {};

          forEachGlobalValue(function(name, value) {
            globalSnapshot[name] = value;
          });
        }

        // return function to retrieve global
        return function() {
          var globalValue = exports ? getGlobalValue(exports) : {};

          var singleGlobal;
          var multipleExports = !!exports;

          if (!exports || encapsulate)
            forEachGlobalValue(function(name, value) {
              if (globalSnapshot[name] === value)
                return;
              if (typeof value == 'undefined')
                return;
              
              // allow global encapsulation where globals are removed
              if (encapsulate)
                __global[name] = undefined;

              if (!exports) {
                globalValue[name] = value;

                if (typeof singleGlobal != 'undefined') {
                  if (!multipleExports && singleGlobal !== value)
                    multipleExports = true;
                }
                else {
                  singleGlobal = value;
                }
              }
            });

          globalValue = multipleExports ? globalValue : singleGlobal;

          // revert globals
          if (oldGlobals) {
            for (var g in oldGlobals)
              __global[g] = oldGlobals[g];
          }
          __global.define = curDefine;

          return globalValue;
        };
      }
    }));
  };
});
/*
  SystemJS CommonJS Format
*/
(function() {
  // CJS Module Format
  // require('...') || exports[''] = ... || exports.asd = ... || module.exports = ...
  var cjsExportsRegEx = /(?:^\uFEFF?|[^$_a-zA-Z\xA0-\uFFFF.])(exports\s*(\[['"]|\.)|module(\.exports|\['exports'\]|\["exports"\])\s*(\[['"]|[=,\.]))/;
  // RegEx adjusted from https://github.com/jbrantly/yabble/blob/master/lib/yabble.js#L339
  var cjsRequireRegEx = /(?:^\uFEFF?|[^$_a-zA-Z\xA0-\uFFFF."'])require\s*\(\s*("[^"\\]*(?:\\.[^"\\]*)*"|'[^'\\]*(?:\\.[^'\\]*)*')\s*\)/g;
  var commentRegEx = /(^|[^\\])(\/\*([\s\S]*?)\*\/|([^:]|^)\/\/(.*)$)/mg;

  var stringRegEx = /("[^"\\\n\r]*(\\.[^"\\\n\r]*)*"|'[^'\\\n\r]*(\\.[^'\\\n\r]*)*')/g;

  // used to support leading #!/usr/bin/env in scripts as supported in Node
  var hashBangRegEx = /^\#\!.*/;

  function getCJSDeps(source) {
    cjsRequireRegEx.lastIndex = commentRegEx.lastIndex = stringRegEx.lastIndex = 0;

    var deps = [];

    var match;

    // track string and comment locations for unminified source    
    var stringLocations = [], commentLocations = [];

    function inLocation(locations, match) {
      for (var i = 0; i < locations.length; i++)
        if (locations[i][0] < match.index && locations[i][1] > match.index)
          return true;
      return false;
    }

    if (source.length / source.split('\n').length < 200) {
      while (match = stringRegEx.exec(source))
        stringLocations.push([match.index, match.index + match[0].length]);

      // TODO: track template literals here before comments
      
      while (match = commentRegEx.exec(source)) {
        // only track comments not starting in strings
        if (!inLocation(stringLocations, match))
          commentLocations.push([match.index + match[1].length, match.index + match[0].length - 1]);
      }
    }

    while (match = cjsRequireRegEx.exec(source)) {
      // ensure we're not within a string or comment location
      if (!inLocation(stringLocations, match) && !inLocation(commentLocations, match)) {
        var dep = match[1].substr(1, match[1].length - 2);
        // skip cases like require('" + file + "')
        if (dep.match(/"|'/))
          continue;
        // trailing slash requires are removed as they don't map mains in SystemJS
        if (dep[dep.length - 1] == '/')
          dep = dep.substr(0, dep.length - 1);
        deps.push(dep);
      }
    }

    return deps;
  }

  hook('instantiate', function(instantiate) {
    return function(load) {
      var loader = this;
      if (!load.metadata.format) {
        cjsExportsRegEx.lastIndex = 0;
        cjsRequireRegEx.lastIndex = 0;
        if (cjsRequireRegEx.exec(load.source) || cjsExportsRegEx.exec(load.source))
          load.metadata.format = 'cjs';
      }

      if (load.metadata.format == 'cjs') {
        var metaDeps = load.metadata.deps;
        var deps = load.metadata.cjsRequireDetection === false ? [] : getCJSDeps(load.source);

        for (var g in load.metadata.globals)
          if (load.metadata.globals[g])
            deps.push(load.metadata.globals[g]);

        var entry = createEntry();

        load.metadata.entry = entry;

        entry.deps = deps;
        entry.executingRequire = true;
        entry.execute = function(_require, exports, module) {
          function require(name) {
            if (name[name.length - 1] == '/')
              name = name.substr(0, name.length - 1);
            return _require.apply(this, arguments);
          }
          require.resolve = function(name) {
            return loader.get('@@cjs-helpers').requireResolve(name, module.id);
          };
          // support module.paths ish
          module.paths = [];
          module.require = _require;

          // ensure meta deps execute first
          if (!load.metadata.cjsDeferDepsExecute)
            for (var i = 0; i < metaDeps.length; i++)
              require(metaDeps[i]);

          var pathVars = loader.get('@@cjs-helpers').getPathVars(module.id);
          var __cjsWrapper = {
            exports: exports,
            args: [require, exports, module, pathVars.filename, pathVars.dirname, __global, __global]
          };

          var cjsWrapper = "(function(require, exports, module, __filename, __dirname, global, GLOBAL";

          // add metadata.globals to the wrapper arguments
          if (load.metadata.globals)
            for (var g in load.metadata.globals) {
              __cjsWrapper.args.push(require(load.metadata.globals[g]));
              cjsWrapper += ", " + g;
            }

          // disable AMD detection
          var define = __global.define;
          __global.define = undefined;
          __global.__cjsWrapper = __cjsWrapper;

          load.source = cjsWrapper + ") {" + load.source.replace(hashBangRegEx, '') + "\n}).apply(__cjsWrapper.exports, __cjsWrapper.args);";

          __exec.call(loader, load);

          __global.__cjsWrapper = undefined;
          __global.define = define;
        };
      }

      return instantiate.call(loader, load);
    };
  });
})();
hookConstructor(function(constructor) {
  return function() {
    var loader = this;
    constructor.call(loader);

    if (typeof window != 'undefined' && typeof document != 'undefined' && window.location)
      var windowOrigin = location.protocol + '//' + location.hostname + (location.port ? ':' + location.port : '');

    function stripOrigin(path) {
      if (path.substr(0, 8) == 'file:///')
        return path.substr(7 + !!isWindows);
      
      if (windowOrigin && path.substr(0, windowOrigin.length) == windowOrigin)
        return path.substr(windowOrigin.length);

      return path;
    }

    loader.set('@@cjs-helpers', loader.newModule({
      requireResolve: function(request, parentId) {
        return stripOrigin(loader.normalizeSync(request, parentId));
      },
      getPathVars: function(moduleId) {
        // remove any plugin syntax
        var pluginIndex = moduleId.lastIndexOf('!');
        var filename;
        if (pluginIndex != -1)
          filename = moduleId.substr(0, pluginIndex);
        else
          filename = moduleId;

        var dirname = filename.split('/');
        dirname.pop();
        dirname = dirname.join('/');

        return {
          filename: stripOrigin(filename),
          dirname: stripOrigin(dirname)
        };
      }
    }))
  };
});/*
 * AMD Helper function module
 * Separated into its own file as this is the part needed for full AMD support in SFX builds
 * NB since implementations have now diverged this can be merged back with amd.js
 */

hook('fetch', function(fetch) {
  return function(load) {
    // script load implies define global leak
    if (load.metadata.scriptLoad && isBrowser)
      __global.define = this.amdDefine;
    return fetch.call(this, load);
  };
});
 
hookConstructor(function(constructor) {
  return function() {
    var loader = this;
    constructor.call(this);

    var commentRegEx = /(\/\*([\s\S]*?)\*\/|([^:]|^)\/\/(.*)$)/mg;
    var cjsRequirePre = "(?:^|[^$_a-zA-Z\\xA0-\\uFFFF.])";
    var cjsRequirePost = "\\s*\\(\\s*(\"([^\"]+)\"|'([^']+)')\\s*\\)";
    var fnBracketRegEx = /\(([^\)]*)\)/;
    var wsRegEx = /^\s+|\s+$/g;
    
    var requireRegExs = {};

    function getCJSDeps(source, requireIndex) {

      // remove comments
      source = source.replace(commentRegEx, '');

      // determine the require alias
      var params = source.match(fnBracketRegEx);
      var requireAlias = (params[1].split(',')[requireIndex] || 'require').replace(wsRegEx, '');

      // find or generate the regex for this requireAlias
      var requireRegEx = requireRegExs[requireAlias] || (requireRegExs[requireAlias] = new RegExp(cjsRequirePre + requireAlias + cjsRequirePost, 'g'));

      requireRegEx.lastIndex = 0;

      var deps = [];

      var match;
      while (match = requireRegEx.exec(source))
        deps.push(match[2] || match[3]);

      return deps;
    }

    /*
      AMD-compatible require
      To copy RequireJS, set window.require = window.requirejs = loader.amdRequire
    */
    function require(names, callback, errback, referer) {
      // in amd, first arg can be a config object... we just ignore
      if (typeof names == 'object' && !(names instanceof Array))
        return require.apply(null, Array.prototype.splice.call(arguments, 1, arguments.length - 1));

      // amd require
      if (typeof names == 'string' && typeof callback == 'function')
        names = [names];
      if (names instanceof Array) {
        var dynamicRequires = [];
        for (var i = 0; i < names.length; i++)
          dynamicRequires.push(loader['import'](names[i], referer));
        Promise.all(dynamicRequires).then(function(modules) {
          if (callback)
            callback.apply(null, modules);
        }, errback);
      }

      // commonjs require
      else if (typeof names == 'string') {
        var defaultJSExtension = loader.defaultJSExtensions && names.substr(names.length - 3, 3) != '.js';
        var normalized = loader.decanonicalize(names, referer);
        if (defaultJSExtension && normalized.substr(normalized.length - 3, 3) == '.js')
          normalized = normalized.substr(0, normalized.length - 3);
        var module = loader.get(normalized);
        if (!module)
          throw new Error('Module not already loaded loading "' + names + '" as ' + normalized + (referer ? ' from "' + referer + '".' : '.'));
        return module.__useDefault ? module['default'] : module;
      }

      else
        throw new TypeError('Invalid require');
    }

    function define(name, deps, factory) {
      if (typeof name != 'string') {
        factory = deps;
        deps = name;
        name = null;
      }
      if (!(deps instanceof Array)) {
        factory = deps;
        deps = ['require', 'exports', 'module'].splice(0, factory.length);
      }

      if (typeof factory != 'function')
        factory = (function(factory) {
          return function() { return factory; }
        })(factory);

      // in IE8, a trailing comma becomes a trailing undefined entry
      if (deps[deps.length - 1] === undefined)
        deps.pop();

      // remove system dependencies
      var requireIndex, exportsIndex, moduleIndex;
      
      if ((requireIndex = indexOf.call(deps, 'require')) != -1) {
        
        deps.splice(requireIndex, 1);

        // only trace cjs requires for non-named
        // named defines assume the trace has already been done
        if (!name)
          deps = deps.concat(getCJSDeps(factory.toString(), requireIndex));
      }

      if ((exportsIndex = indexOf.call(deps, 'exports')) != -1)
        deps.splice(exportsIndex, 1);
      
      if ((moduleIndex = indexOf.call(deps, 'module')) != -1)
        deps.splice(moduleIndex, 1);

      function execute(req, exports, module) {
        var depValues = [];
        for (var i = 0; i < deps.length; i++)
          depValues.push(req(deps[i]));

        module.uri = module.id;

        module.config = function() {};

        // add back in system dependencies
        if (moduleIndex != -1)
          depValues.splice(moduleIndex, 0, module);
        
        if (exportsIndex != -1)
          depValues.splice(exportsIndex, 0, exports);
        
        if (requireIndex != -1) {
          function contextualRequire(names, callback, errback) {
            if (typeof names == 'string' && typeof callback != 'function')
              return req(names);
            return require.call(loader, names, callback, errback, module.id);
          }
          contextualRequire.toUrl = function(name) {
            // normalize without defaultJSExtensions
            var defaultJSExtension = loader.defaultJSExtensions && name.substr(name.length - 3, 3) != '.js';
            var url = loader.decanonicalize(name, module.id);
            if (defaultJSExtension && url.substr(url.length - 3, 3) == '.js')
              url = url.substr(0, url.length - 3);
            return url;
          };
          depValues.splice(requireIndex, 0, contextualRequire);
        }

        // set global require to AMD require
        var curRequire = __global.require;
        __global.require = require;

        var output = factory.apply(exportsIndex == -1 ? __global : exports, depValues);

        __global.require = curRequire;

        if (typeof output == 'undefined' && module)
          output = module.exports;

        if (typeof output != 'undefined')
          return output;
      }

      var entry = createEntry();
      entry.name = name && (loader.decanonicalize || loader.normalize).call(loader, name);
      entry.deps = deps;
      entry.execute = execute;

      loader.pushRegister_({
        amd: true,
        entry: entry
      });
    }
    define.amd = {};

    // reduction function to attach defines to a load record
    hook('reduceRegister_', function(reduceRegister) {
      return function(load, register) {
        // only handle AMD registers here
        if (!register || !register.amd)
          return reduceRegister.call(this, load, register);

        var curMeta = load && load.metadata;
        var entry = register.entry;

        if (curMeta) {
          if (!curMeta.format || curMeta.format == 'detect')
            curMeta.format = 'amd';
          else if (!entry.name && curMeta.format != 'amd')
            throw new Error('AMD define called while executing ' + curMeta.format + ' module ' + load.name);
        }

        // anonymous define
        if (!entry.name) {
          if (!curMeta)
            throw new TypeError('Unexpected anonymous AMD define.');

          if (curMeta.entry && !curMeta.entry.name)
            throw new Error('Multiple anonymous defines in module ' + load.name);
          
          curMeta.entry = entry;
        }
        // named define
        else {
          // if we don't have any other defines, 
          // then let this be an anonymous define
          // this is just to support single modules of the form:
          // define('jquery')
          // still loading anonymously
          // because it is done widely enough to be useful
          // as soon as there is more than one define, this gets removed though
          if (curMeta) {
            if (!curMeta.entry && !curMeta.bundle)
              curMeta.entry = entry;
            else if (curMeta.entry && curMeta.entry.name && curMeta.entry.name != load.name)
              curMeta.entry = undefined;

            // note this is now a bundle
            curMeta.bundle = true;
          }

          // define the module through the register registry
          if (!(entry.name in this.defined))
            this.defined[entry.name] = entry;
        }
      };
    });

    loader.amdDefine = define;
    loader.amdRequire = require;
  };
});/*
  SystemJS AMD Format
*/
(function() {
  // AMD Module Format Detection RegEx
  // define([.., .., ..], ...)
  // define(varName); || define(function(require, exports) {}); || define({})
  var amdRegEx = /(?:^\uFEFF?|[^$_a-zA-Z\xA0-\uFFFF.])define\s*\(\s*("[^"]+"\s*,\s*|'[^']+'\s*,\s*)?\s*(\[(\s*(("[^"]+"|'[^']+')\s*,|\/\/.*\r?\n|\/\*(.|\s)*?\*\/))*(\s*("[^"]+"|'[^']+')\s*,?)?(\s*(\/\/.*\r?\n|\/\*(.|\s)*?\*\/))*\s*\]|function\s*|{|[_$a-zA-Z\xA0-\uFFFF][_$a-zA-Z0-9\xA0-\uFFFF]*\))/;

  hook('instantiate', function(instantiate) {
    return function(load) {
      var loader = this;
      
      if (load.metadata.format == 'amd' || !load.metadata.format && load.source.match(amdRegEx)) {
        load.metadata.format = 'amd';
        
        if (!loader.builder && loader.execute !== false) {
          var curDefine = __global.define;
          __global.define = this.amdDefine;

          try {
            __exec.call(loader, load);
          }
          finally {
            __global.define = curDefine;
          }

          if (!load.metadata.entry && !load.metadata.bundle)
            throw new TypeError('AMD module ' + load.name + ' did not define');
        }
        else {
          load.metadata.execute = function() {
            return load.metadata.builderExecute.apply(this, arguments);
          };
        }
      }

      return instantiate.call(loader, load);
    };
  });

})();
/*
  SystemJS Loader Plugin Support

  Supports plugin loader syntax with "!", or via metadata.loader

  The plugin name is loaded as a module itself, and can override standard loader hooks
  for the plugin resource. See the plugin section of the systemjs readme.
*/

(function() {
  function getParentName(loader, parentName) {
    // if parent is a plugin, normalize against the parent plugin argument only
    if (parentName) {
      var parentPluginIndex;
      if (loader.pluginFirst) {
        if ((parentPluginIndex = parentName.lastIndexOf('!')) != -1)
          return parentName.substr(parentPluginIndex + 1);
      }
      else {
        if ((parentPluginIndex = parentName.indexOf('!')) != -1)
          return parentName.substr(0, parentPluginIndex);
      }

      return parentName;
    }
  }

  function parsePlugin(loader, name) {
    var argumentName;
    var pluginName;

    var pluginIndex = name.lastIndexOf('!');

    if (pluginIndex == -1)
      return;

    if (loader.pluginFirst) {
      argumentName = name.substr(pluginIndex + 1);
      pluginName = name.substr(0, pluginIndex);
    }
    else {
      argumentName = name.substr(0, pluginIndex);
      pluginName = name.substr(pluginIndex + 1) || argumentName.substr(argumentName.lastIndexOf('.') + 1);
    }

    return {
      argument: argumentName,
      plugin: pluginName
    };
  }

  // put name back together after parts have been normalized
  function combinePluginParts(loader, argumentName, pluginName, defaultExtension) {
    if (defaultExtension && argumentName.substr(argumentName.length - 3, 3) == '.js')
      argumentName = argumentName.substr(0, argumentName.length - 3);

    if (loader.pluginFirst) {
      return pluginName + '!' + argumentName;
    }
    else {
      return argumentName + '!' + pluginName;
    }
  }

  // note if normalize will add a default js extension
  // if so, remove for backwards compat
  // this is strange and sucks, but will be deprecated
  function checkDefaultExtension(loader, arg) {
    return loader.defaultJSExtensions && arg.substr(arg.length - 3, 3) != '.js';
  }

  function createNormalizeSync(normalizeSync) {
    return function(name, parentName, isPlugin) {
      var loader = this;

      var parsed = parsePlugin(loader, name);
      parentName = getParentName(this, parentName);

      if (!parsed)
        return normalizeSync.call(this, name, parentName, isPlugin);

      // if this is a plugin, normalize the plugin name and the argument
      var argumentName = loader.normalizeSync(parsed.argument, parentName, true);
      var pluginName = loader.normalizeSync(parsed.plugin, parentName, true);
      return combinePluginParts(loader, argumentName, pluginName, checkDefaultExtension(loader, parsed.argument));
    };
  }

  hook('decanonicalize', createNormalizeSync);
  hook('normalizeSync', createNormalizeSync);

  hook('normalize', function(normalize) {
    return function(name, parentName, isPlugin) {
      var loader = this;

      parentName = getParentName(this, parentName);

      var parsed = parsePlugin(loader, name);

      if (!parsed)
        return normalize.call(loader, name, parentName, isPlugin);

      return Promise.all([
        loader.normalize(parsed.argument, parentName, true),
        loader.normalize(parsed.plugin, parentName, false)
      ])
      .then(function(normalized) {
        return combinePluginParts(loader, normalized[0], normalized[1], checkDefaultExtension(loader, parsed.argument));
      });
    }
  });

  hook('locate', function(locate) {
    return function(load) {
      var loader = this;

      var name = load.name;

      // plugin syntax
      var pluginSyntaxIndex;
      if (loader.pluginFirst) {
        if ((pluginSyntaxIndex = name.indexOf('!')) != -1) {
          load.metadata.loader = name.substr(0, pluginSyntaxIndex);
          load.name = name.substr(pluginSyntaxIndex + 1);
        }
      }
      else {
        if ((pluginSyntaxIndex = name.lastIndexOf('!')) != -1) {
          load.metadata.loader = name.substr(pluginSyntaxIndex + 1);
          load.name = name.substr(0, pluginSyntaxIndex);
        }
      }

      return locate.call(loader, load)
      .then(function(address) {
        if (pluginSyntaxIndex != -1 || !load.metadata.loader)
          return address;

        // normalize plugin relative to parent in locate here when
        // using plugin via loader metadata
        return (loader.pluginLoader || loader).normalize(load.metadata.loader, load.name)
        .then(function(loaderNormalized) {
          load.metadata.loader = loaderNormalized;
          return address;
        });
      })
      .then(function(address) {
        var plugin = load.metadata.loader;

        if (!plugin)
          return address;

        // don't allow a plugin to load itself
        if (load.name == plugin)
          throw new Error('Plugin ' + plugin + ' cannot load itself, make sure it is excluded from any wildcard meta configuration via a custom loader: false rule.');

        // only fetch the plugin itself if this name isn't defined
        if (loader.defined && loader.defined[name])
          return address;

        var pluginLoader = loader.pluginLoader || loader;

        // load the plugin module and run standard locate
        return pluginLoader['import'](plugin)
        .then(function(loaderModule) {
          // store the plugin module itself on the metadata
          load.metadata.loaderModule = loaderModule;

          load.address = address;
          if (loaderModule.locate)
            return loaderModule.locate.call(loader, load);

          return address;
        });
      });
    };
  });

  hook('fetch', function(fetch) {
    return function(load) {
      var loader = this;
      if (load.metadata.loaderModule && load.metadata.loaderModule.fetch && load.metadata.format != 'defined') {
        load.metadata.scriptLoad = false;
        return load.metadata.loaderModule.fetch.call(loader, load, function(load) {
          return fetch.call(loader, load);
        });
      }
      else {
        return fetch.call(loader, load);
      }
    };
  });

  hook('translate', function(translate) {
    return function(load) {
      var loader = this;
      var args = arguments;
      if (load.metadata.loaderModule && load.metadata.loaderModule.translate && load.metadata.format != 'defined') {
        return Promise.resolve(load.metadata.loaderModule.translate.apply(loader, args)).then(function(result) {
          var sourceMap = load.metadata.sourceMap;

          // sanitize sourceMap if an object not a JSON string
          if (sourceMap) {
            if (typeof sourceMap != 'object')
              throw new Error('load.metadata.sourceMap must be set to an object.');

            var originalName = load.address.split('!')[0];

            // force set the filename of the original file
            if (!sourceMap.file || sourceMap.file == load.address)
              sourceMap.file = originalName + '!transpiled';

            // force set the sources list if only one source
            if (!sourceMap.sources || sourceMap.sources.length <= 1 && (!sourceMap.sources[0] || sourceMap.sources[0] == load.address))
              sourceMap.sources = [originalName];
          }

          // if running on file:/// URLs, sourcesContent is necessary
          // load.metadata.sourceMap.sourcesContent = [load.source];

          if (typeof result == 'string')
            load.source = result;

          return translate.apply(loader, args);
        });
      }
      else {
        return translate.apply(loader, args);
      }
    };
  });

  hook('instantiate', function(instantiate) {
    return function(load) {
      var loader = this;
      var calledInstantiate = false;

      if (load.metadata.loaderModule && load.metadata.loaderModule.instantiate && !loader.builder && load.metadata.format != 'defined')
        return Promise.resolve(load.metadata.loaderModule.instantiate.call(loader, load, function(load) {
          if (calledInstantiate)
            throw new Error('Instantiate must only be called once.');
          calledInstantiate = true;
          return instantiate.call(loader, load);
        })).then(function(result) {
          if (calledInstantiate)
            return result;

          if (result !== undefined) {
            load.metadata.entry = createEntry();
            load.metadata.entry.execute = function() {
              return result;
            }
            load.metadata.entry.deps = load.metadata.deps;
            load.metadata.format = 'defined';
          }
          return instantiate.call(loader, load);
        });
      else
        return instantiate.call(loader, load);
    };
  });

})();
/*
 * Conditions Extension
 *
 *   Allows a condition module to alter the resolution of an import via syntax:
 *
 *     import $ from 'jquery/#{browser}';
 *
 *   Will first load the module 'browser' via `SystemJS.import('browser')` and 
 *   take the default export of that module.
 *   If the default export is not a string, an error is thrown.
 * 
 *   We then substitute the string into the require to get the conditional resolution
 *   enabling environment-specific variations like:
 * 
 *     import $ from 'jquery/ie'
 *     import $ from 'jquery/firefox'
 *     import $ from 'jquery/chrome'
 *     import $ from 'jquery/safari'
 *
 *   It can be useful for a condition module to define multiple conditions.
 *   This can be done via the `|` modifier to specify an export member expression:
 *
 *     import 'jquery/#{./browser.js|grade.version}'
 *
 *   Where the `grade` export `version` member in the `browser.js` module  is substituted.
 *
 *
 * Boolean Conditionals
 *
 *   For polyfill modules, that are used as imports but have no module value,
 *   a binary conditional allows a module not to be loaded at all if not needed:
 *
 *     import 'es5-shim#?./conditions.js|needs-es5shim'
 *
 *   These conditions can also be negated via:
 *     
 *     import 'es5-shim#?./conditions.js|~es6'
 *
 */

  var sysConditions = ['browser', 'node', 'dev', 'build', 'production', 'default'];

  function parseCondition(condition) {
    var conditionExport, conditionModule, negation;

    var negation = condition[0] == '~';
    var conditionExportIndex = condition.lastIndexOf('|');
    if (conditionExportIndex != -1) {
      conditionExport = condition.substr(conditionExportIndex + 1);
      conditionModule = condition.substr(negation, conditionExportIndex - negation);
      
      if (negation)
        warn.call(this, 'Condition negation form "' + condition + '" is deprecated for "' + conditionModule + '|~' + conditionExport + '"');

      if (conditionExport[0] == '~') {
        negation = true;
        conditionExport = conditionExport.substr(1);
      }
    }
    else {
      conditionExport = 'default';
      conditionModule = condition.substr(negation);
      if (sysConditions.indexOf(conditionModule) != -1) {
        conditionExport = conditionModule;
        conditionModule = null;
      }
    }

    return {
      module: conditionModule || '@system-env',
      prop: conditionExport,
      negate: negation
    };
  }

  function serializeCondition(conditionObj) {
    return conditionObj.module + '|' + (conditionObj.negate ? '~' : '') + conditionObj.prop;
  }

  function resolveCondition(conditionObj, parentName, bool) {
    var self = this;
    return this.normalize(conditionObj.module, parentName)
    .then(function(normalizedCondition) {
      return self.load(normalizedCondition)
      .then(function(q) {
        var m = readMemberExpression(conditionObj.prop, self.get(normalizedCondition));

        if (bool && typeof m != 'boolean')
          throw new TypeError('Condition ' + serializeCondition(conditionObj) + ' did not resolve to a boolean.');

        return conditionObj.negate ? !m : m;
      });
    });
  }

  var interpolationRegEx = /#\{[^\}]+\}/;
  function interpolateConditional(name, parentName) {
    // first we normalize the conditional
    var conditionalMatch = name.match(interpolationRegEx);

    if (!conditionalMatch)
      return Promise.resolve(name);

    var conditionObj = parseCondition.call(this, conditionalMatch[0].substr(2, conditionalMatch[0].length - 3));

    // in builds, return normalized conditional
    if (this.builder)
      return this['normalize'](conditionObj.module, parentName)
      .then(function(conditionModule) {
        conditionObj.module = conditionModule;
        return name.replace(interpolationRegEx, '#{' + serializeCondition(conditionObj) + '}');
      });

    return resolveCondition.call(this, conditionObj, parentName, false)
    .then(function(conditionValue) {
      if (typeof conditionValue !== 'string')
        throw new TypeError('The condition value for ' + name + ' doesn\'t resolve to a string.');

      if (conditionValue.indexOf('/') != -1)
        throw new TypeError('Unabled to interpolate conditional ' + name + (parentName ? ' in ' + parentName : '') + '\n\tThe condition value ' + conditionValue + ' cannot contain a "/" separator.');

      return name.replace(interpolationRegEx, conditionValue);
    });
  }

  function booleanConditional(name, parentName) {
    // first we normalize the conditional
    var booleanIndex = name.lastIndexOf('#?');

    if (booleanIndex == -1)
      return Promise.resolve(name);

    var conditionObj = parseCondition.call(this, name.substr(booleanIndex + 2));

    // in builds, return normalized conditional
    if (this.builder)
      return this['normalize'](conditionObj.module, parentName)
      .then(function(conditionModule) {
        conditionObj.module = conditionModule;
        return name.substr(0, booleanIndex) + '#?' + serializeCondition(conditionObj);
      });

    return resolveCondition.call(this, conditionObj, parentName, true)
    .then(function(conditionValue) {
      return conditionValue ? name.substr(0, booleanIndex) : '@empty';
    });
  }

  // normalizeSync does not parse conditionals at all although it could
  hook('normalize', function(normalize) {
    return function(name, parentName, skipExt) {
      var loader = this;
      return booleanConditional.call(loader, name, parentName)
      .then(function(name) {
        return normalize.call(loader, name, parentName, skipExt);
      })
      .then(function(normalized) {
        return interpolateConditional.call(loader, normalized, parentName);
      });
    };
  });
/*
 * Alias Extension
 *
 * Allows a module to be a plain copy of another module by module name
 *
 * SystemJS.meta['mybootstrapalias'] = { alias: 'bootstrap' };
 *
 */
(function() {
  // aliases
  hook('fetch', function(fetch) {
    return function(load) {
      var alias = load.metadata.alias;
      var aliasDeps = load.metadata.deps || [];
      if (alias) {
        load.metadata.format = 'defined';
        var entry = createEntry();
        this.defined[load.name] = entry;
        entry.declarative = true;
        entry.deps = aliasDeps.concat([alias]);
        entry.declare = function(_export) {
          return {
            setters: [function(module) {
              for (var p in module)
                _export(p, module[p]);
              if (module.__useDefault)
                entry.module.exports.__useDefault = true;
            }],
            execute: function() {}
          };
        };
        return '';
      }

      return fetch.call(this, load);
    };
  });
})();/*
 * Meta Extension
 *
 * Sets default metadata on a load record (load.metadata) from
 * loader.metadata via SystemJS.meta function.
 *
 *
 * Also provides an inline meta syntax for module meta in source.
 *
 * Eg:
 *
 * loader.meta({
 *   'my/module': { deps: ['jquery'] }
 *   'my/*': { format: 'amd' }
 * });
 *
 * Which in turn populates loader.metadata.
 *
 * load.metadata.deps and load.metadata.format will then be set
 * for 'my/module'
 *
 * The same meta could be set with a my/module.js file containing:
 *
 * my/module.js
 *   "format amd";
 *   "deps[] jquery";
 *   "globals.some value"
 *   console.log('this is my/module');
 *
 * Configuration meta always takes preference to inline meta.
 *
 * Multiple matches in wildcards are supported and ammend the meta.
 *
 *
 * The benefits of the function form is that paths are URL-normalized
 * supporting say
 *
 * loader.meta({ './app': { format: 'cjs' } });
 *
 * Instead of needing to set against the absolute URL (https://site.com/app.js)
 *
 */

(function() {

  hookConstructor(function(constructor) {
    return function() {
      this.meta = {};
      constructor.call(this);
    };
  });

  hook('locate', function(locate) {
    return function(load) {
      var meta = this.meta;
      var name = load.name;

      // NB for perf, maybe introduce a fast-path wildcard lookup cache here
      // which is checked first

      // apply wildcard metas
      var bestDepth = 0;
      var wildcardIndex;
      for (var module in meta) {
        wildcardIndex = module.indexOf('*');
        if (wildcardIndex === -1)
          continue;
        if (module.substr(0, wildcardIndex) === name.substr(0, wildcardIndex)
            && module.substr(wildcardIndex + 1) === name.substr(name.length - module.length + wildcardIndex + 1)) {
          var depth = module.split('/').length;
          if (depth > bestDepth)
            bestDepth = depth;
          extendMeta(load.metadata, meta[module], bestDepth != depth);
        }
      }

      // apply exact meta
      if (meta[name])
        extendMeta(load.metadata, meta[name]);

      return locate.call(this, load);
    };
  });

  // detect any meta header syntax
  // only set if not already set
  var metaRegEx = /^(\s*\/\*[^\*]*(\*(?!\/)[^\*]*)*\*\/|\s*\/\/[^\n]*|\s*"[^"]+"\s*;?|\s*'[^']+'\s*;?)+/;
  var metaPartRegEx = /\/\*[^\*]*(\*(?!\/)[^\*]*)*\*\/|\/\/[^\n]*|"[^"]+"\s*;?|'[^']+'\s*;?/g;

  function setMetaProperty(target, p, value) {
    var pParts = p.split('.');
    var curPart;
    while (pParts.length > 1) {
      curPart = pParts.shift();
      target = target[curPart] = target[curPart] || {};
    }
    curPart = pParts.shift();
    if (!(curPart in target))
      target[curPart] = value;
  }

  hook('translate', function(translate) {
    return function(load) {
      // shortpath for bundled
      if (load.metadata.format == 'defined') {
        load.metadata.deps = load.metadata.deps || [];
        return Promise.resolve(load.source);
      }

      // NB meta will be post-translate pending transpiler conversion to plugins
      var meta = load.source.match(metaRegEx);
      if (meta) {
        var metaParts = meta[0].match(metaPartRegEx);

        for (var i = 0; i < metaParts.length; i++) {
          var curPart = metaParts[i];
          var len = curPart.length;

          var firstChar = curPart.substr(0, 1);
          if (curPart.substr(len - 1, 1) == ';')
            len--;

          if (firstChar != '"' && firstChar != "'")
            continue;

          var metaString = curPart.substr(1, curPart.length - 3);
          var metaName = metaString.substr(0, metaString.indexOf(' '));

          if (metaName) {
            var metaValue = metaString.substr(metaName.length + 1, metaString.length - metaName.length - 1);

            if (metaName.substr(metaName.length - 2, 2) == '[]') {
              metaName = metaName.substr(0, metaName.length - 2);
              load.metadata[metaName] = load.metadata[metaName] || [];
              load.metadata[metaName].push(metaValue);
            }
            else if (load.metadata[metaName] instanceof Array) {
              // temporary backwards compat for previous "deps" syntax
              warn.call(this, 'Module ' + load.name + ' contains deprecated "deps ' + metaValue + '" meta syntax.\nThis should be updated to "deps[] ' + metaValue + '" for pushing to array meta.');
              load.metadata[metaName].push(metaValue);
            }
            else {
              setMetaProperty(load.metadata, metaName, metaValue);
            }
          }
          else {
            load.metadata[metaString] = true;
          }
        }
      }

      return translate.apply(this, arguments);
    };
  });
})();
/*
  System bundles

  Allows a bundle module to be specified which will be dynamically 
  loaded before trying to load a given module.

  For example:
  SystemJS.bundles['mybundle'] = ['jquery', 'bootstrap/js/bootstrap']

  Will result in a load to "mybundle" whenever a load to "jquery"
  or "bootstrap/js/bootstrap" is made.

  In this way, the bundle becomes the request that provides the module
*/

(function() {
  // bundles support (just like RequireJS)
  // bundle name is module name of bundle itself
  // bundle is array of modules defined by the bundle
  // when a module in the bundle is requested, the bundle is loaded instead
  // of the form SystemJS.bundles['mybundle'] = ['jquery', 'bootstrap/js/bootstrap']
  hookConstructor(function(constructor) {
    return function() {
      constructor.call(this);
      this.bundles = {};
      this._loader.loadedBundles = {};
    };
  });

  // assign bundle metadata for bundle loads
  hook('locate', function(locate) {
    return function(load) {
      var loader = this;
      var matched = false;

      if (!(load.name in loader.defined))
        for (var b in loader.bundles) {
          for (var i = 0; i < loader.bundles[b].length; i++) {
            var curModule = loader.bundles[b][i];

            if (curModule == load.name) {
              matched = true;
              break;
            }

            // wildcard in bundles does not include / boundaries
            if (curModule.indexOf('*') != -1) {
              var parts = curModule.split('*');
              if (parts.length != 2) {
                loader.bundles[b].splice(i--, 1);
                continue;
              }
              
              if (load.name.substring(0, parts[0].length) == parts[0] &&
                  load.name.substr(load.name.length - parts[1].length, parts[1].length) == parts[1] &&
                  load.name.substr(parts[0].length, load.name.length - parts[1].length - parts[0].length).indexOf('/') == -1) {
                matched = true;
                break;
              }
            }
          }

          if (matched)
            return loader['import'](b)
            .then(function() {
              return locate.call(loader, load);
            });
        }

      return locate.call(loader, load);
    };
  });
})();
/*
 * Dependency Tree Cache
 * 
 * Allows a build to pre-populate a dependency trace tree on the loader of 
 * the expected dependency tree, to be loaded upfront when requesting the
 * module, avoinding the n round trips latency of module loading, where 
 * n is the dependency tree depth.
 *
 * eg:
 * SystemJS.depCache = {
 *  'app': ['normalized', 'deps'],
 *  'normalized': ['another'],
 *  'deps': ['tree']
 * };
 * 
 * SystemJS.import('app') 
 * // simultaneously starts loading all of:
 * // 'normalized', 'deps', 'another', 'tree'
 * // before "app" source is even loaded
 *
 */

(function() {
  hookConstructor(function(constructor) {
    return function() {
      constructor.call(this);
      this.depCache = {};
    }
  });

  hook('locate', function(locate) {
    return function(load) {
      var loader = this;
      // load direct deps, in turn will pick up their trace trees
      var deps = loader.depCache[load.name];
      if (deps)
        for (var i = 0; i < deps.length; i++)
          loader['import'](deps[i], load.name);

      return locate.call(loader, load);
    };
  });
})();
  
System = new SystemJSLoader();

__global.SystemJS = System;
System.version = '0.19.41 Standard';
  if (typeof module == 'object' && module.exports && typeof exports == 'object')
    module.exports = System;

  __global.System = System;

})(typeof self != 'undefined' ? self : global);}

// auto-load Promise polyfill if needed in the browser
var doPolyfill = typeof Promise === 'undefined';

// document.write
if (typeof document !== 'undefined') {
  var scripts = document.getElementsByTagName('script');
  $__curScript = scripts[scripts.length - 1];
  if (document.currentScript && ($__curScript.defer || $__curScript.async))
    $__curScript = document.currentScript;
  if (!$__curScript.src)
    $__curScript = undefined;
  if (doPolyfill) {
    var curPath = $__curScript.src;
    var basePath = curPath.substr(0, curPath.lastIndexOf('/') + 1);
    window.systemJSBootstrap = bootstrap;
    document.write(
      '<' + 'script type="text/javascript" src="' + basePath + 'system-polyfills.js">' + '<' + '/script>'
    );
  }
  else {
    bootstrap();
  }
}
// importScripts
else if (typeof importScripts !== 'undefined') {
  var basePath = '';
  try {
    throw new Error('_');
  } catch (e) {
    e.stack.replace(/(?:at|@).*(http.+):[\d]+:[\d]+/, function(m, url) {
      $__curScript = { src: url };
      basePath = url.replace(/\/[^\/]*$/, '/');
    });
  }
  if (doPolyfill)
    importScripts(basePath + 'system-polyfills.js');
  bootstrap();
}
else {
  $__curScript = typeof __filename != 'undefined' ? { src: __filename } : null;
  bootstrap();
}


})();