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var DataView = require('./_DataView'),    Map = require('./_Map'),    Promise = require('./_Promise'),    Set = require('./_Set'),    WeakMap = require('./_WeakMap'),    baseGetTag = require('./_baseGetTag'),    toSource = require('./_toSource');
/** `Object#toString` result references. */var mapTag = '[object Map]',    objectTag = '[object Object]',    promiseTag = '[object Promise]',    setTag = '[object Set]',    weakMapTag = '[object WeakMap]';
var dataViewTag = '[object DataView]';
/** Used to detect maps, sets, and weakmaps. */var dataViewCtorString = toSource(DataView),    mapCtorString = toSource(Map),    promiseCtorString = toSource(Promise),    setCtorString = toSource(Set),    weakMapCtorString = toSource(WeakMap);
/** * Gets the `toStringTag` of `value`. * * @private * @param {*} value The value to query. * @returns {string} Returns the `toStringTag`. */var getTag = baseGetTag;
// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||    (Map && getTag(new Map) != mapTag) ||    (Promise && getTag(Promise.resolve()) != promiseTag) ||    (Set && getTag(new Set) != setTag) ||    (WeakMap && getTag(new WeakMap) != weakMapTag)) {  getTag = function(value) {    var result = baseGetTag(value),        Ctor = result == objectTag ? value.constructor : undefined,        ctorString = Ctor ? toSource(Ctor) : '';
    if (ctorString) {      switch (ctorString) {        case dataViewCtorString: return dataViewTag;        case mapCtorString: return mapTag;        case promiseCtorString: return promiseTag;        case setCtorString: return setTag;        case weakMapCtorString: return weakMapTag;      }    }    return result;  };}
module.exports = getTag;