content: function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
  
  function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
  
  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
  
  import React from 'react';
  import PropTypes from 'prop-types';
  import warning from 'warning';
  import matchPath from './matchPath';
  
  /**
   * The public API for rendering the first <Route> that matches.
   */
  
  var Switch = function (_React$Component) {
    _inherits(Switch, _React$Component);
  
    function Switch() {
      _classCallCheck(this, Switch);
  
      return _possibleConstructorReturn(this, _React$Component.apply(this, arguments));
    }
  
    Switch.prototype.componentWillReceiveProps = function componentWillReceiveProps(nextProps) {
      warning(!(nextProps.location && !this.props.location), '<Switch> elements should not change from uncontrolled to controlled (or vice versa). You initially used no "location" prop and then provided one on a subsequent render.');
  
      warning(!(!nextProps.location && this.props.location), '<Switch> elements should not change from controlled to uncontrolled (or vice versa). You provided a "location" prop initially but omitted it on a subsequent render.');
    };
  
    Switch.prototype.render = function render() {
      var route = this.context.router.route;
      var children = this.props.children;
  
      var location = this.props.location || route.location;
  
      var match = void 0,
          child = void 0;
      React.Children.forEach(children, function (element) {
        if (!React.isValidElement(element)) return;
  
        var _element$props = element.props,
            pathProp = _element$props.path,
            exact = _element$props.exact,
            strict = _element$props.strict,
            from = _element$props.from;
  
        var path = pathProp || from;
  
        if (match == null) {
          child = element;
          match = path ? matchPath(location.pathname, { path: path, exact: exact, strict: strict }) : route.match;
        }
      });
  
      return match ? React.cloneElement(child, { location: location, computedMatch: match }) : null;
    };
  
    return Switch;
  }(React.Component);
  
  Switch.contextTypes = {
    router: PropTypes.shape({
      route: PropTypes.object.isRequired
    }).isRequired
  };
  Switch.propTypes = {
    children: PropTypes.node,
    location: PropTypes.object
  };
  
  
  export default Switch;