text: 'use strict';
  
  var Range = require('../internal/Range'),
      classChecks = require('../../common/var/classChecks'),
      getDateForRange = require('../internal/getDateForRange'),
      createDateRangeFromString = require('../internal/createDateRangeFromString');
  
  var isString = classChecks.isString;
  
  var DateRangeConstructor = function(start, end) {
    if (arguments.length === 1 && isString(start)) {
      return createDateRangeFromString(start);
    }
    return new Range(getDateForRange(start), getDateForRange(end));
  };
  
  module.exports = DateRangeConstructor;