| // |
| // Copyright 2016 Google Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| |
| #import <Foundation/Foundation.h> |
| |
| NS_ASSUME_NONNULL_BEGIN |
| |
| /** |
| * An block-based enumerator that repeatedly invokes the block to return the next object. |
| */ |
| @interface GREYDataEnumerator : NSEnumerator |
| |
| /** |
| * @remark init is not an available initializer. Use the other initializers. |
| */ |
| - (instancetype)init NS_UNAVAILABLE; |
| |
| /** |
| * Instantiates the enumerator with custom information and a block to return the next object. |
| * |
| * @param userInfo Custom object that is passed into the block. Use this for passing any |
| * additional information required by the block. |
| * @param nextObjectBlock A block that is invoked to return the next object in the enumerator. |
| * |
| * @return An instance of GREYDataEnumerator, initialized with the specified information. |
| */ |
| - (instancetype)initWithUserInfo:(id)userInfo |
| block:(id(^)(id))nextObjectBlock NS_DESIGNATED_INITIALIZER; |
| |
| #pragma mark - NSEnumerator |
| |
| /** |
| * @return The next object in the enumerator returned by the @c nextObjectBlock. |
| */ |
| - (id _Nullable)nextObject; |
| /** |
| * @return An array of all the objects in the enumerator. |
| */ |
| - (NSArray *)allObjects; |
| |
| @end |
| |
| NS_ASSUME_NONNULL_END |
