1 /* 2 * 3 * Copyright 2015 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 #import <Foundation/Foundation.h> 20 21 /** 22 * Concrete subclass of NSEnumerator that delegates the invocations of nextObject to a block passed 23 * on initialization. 24 */ 25 @interface GRXNSBlockEnumerator : NSEnumerator 26 /** 27 * The first time the passed block returns nil, the enumeration will end and the block will be 28 * released. 29 */ 30 - (instancetype)initWithValueSupplier:(id (^)(void))block; 31 @end 32