Function updateMemoComponent

lib/assets/react-source/development/react.js:20534–20611

(current, workInProgress, Component, nextProps, updateExpirationTime, renderExpirationTime)

	}

	function updateMemoComponent(current, workInProgress, Component, nextProps, updateExpirationTime, renderExpirationTime) {
	  if (current === null) {
	    var type = Component.type;

	    if (isSimpleFunctionComponent(type) && Component.compare === null && // SimpleMemoComponent codepath doesn't resolve outer props either.
	    Component.defaultProps === undefined) {
	      var resolvedType = type;

	      {
	        resolvedType = resolveFunctionForHotReloading(type);
	      } // If this is a plain function component without default props,
	      // and with only the default shallow comparison, we upgrade it
	      // to a SimpleMemoComponent to allow fast path updates.


	      workInProgress.tag = SimpleMemoComponent;
	      workInProgress.type = resolvedType;

	      {
	        validateFunctionComponentInDev(workInProgress, type);
	      }

	      return updateSimpleMemoComponent(current, workInProgress, resolvedType, nextProps, updateExpirationTime, renderExpirationTime);
	    }

	    {
	      var innerPropTypes = type.propTypes;

	      if (innerPropTypes) {
	        // Inner memo component props aren't currently validated in createElement.
	        // We could move it there, but we'd still need this for lazy code path.
	        checkPropTypes(innerPropTypes, nextProps, // Resolved props
	        'prop', getComponentName(type), getCurrentFiberStackInDev);
	      }
	    }

	    var child = createFiberFromTypeAndProps(Component.type, null, nextProps, null, workInProgress.mode, renderExpirationTime);
	    child.ref = workInProgress.ref;
	    child.return = workInProgress;
	    workInProgress.child = child;
	    return child;
	  }

	  {
	    var _type = Component.type;
	    var _innerPropTypes = _type.propTypes;

	    if (_innerPropTypes) {
	      // Inner memo component props aren't currently validated in createElement.
	      // We could move it there, but we'd still need this for lazy code path.
	      checkPropTypes(_innerPropTypes, nextProps, // Resolved props
	      'prop', getComponentName(_type), getCurrentFiberStackInDev);
	    }
	  }

	  var currentChild = current.child; // This is always exactly one child

	  if (updateExpirationTime < renderExpirationTime) {