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//
// GTMNSEnumerator+Filter.h
//
// Copyright 2007-2009 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>
// A generic category for methods that allow us to filter enumeratable
// containers, inspired by C++ Standard Library's use of iterators.
// Like in C++, these assume the underlying container is not modified during
// the lifetime of the iterator.
//
@interface NSEnumerator (GTMEnumeratorFilterAdditions)
// Performs -[element predicate:argument] on each object in self.
// Returns an enumerator where -[element predicate:argument] returned YES.
// Predicate must be of form -(BOOL)predicate:(id)argument.
- (NSEnumerator *)gtm_filteredEnumeratorByMakingEachObjectPerformSelector:(SEL)predicate
withObject:(id)argument;
// Performs -[element selector:argument] on each object in self.
// Returns an enumerator of the return values of -[element selector:argument].
// Selector must be of form -(id)selector:(id)argument.
- (NSEnumerator *)gtm_enumeratorByMakingEachObjectPerformSelector:(SEL)selector
withObject:(id)argument;
// Performs -[target predicate:element] on each object in self.
// Returns an enumerator where -[target predicate:element] returned YES.
// Predicate must be of form -(BOOL)predicate:(id)element.
- (NSEnumerator *)gtm_filteredEnumeratorByTarget:(id)target
performOnEachSelector:(SEL)predicate;
// Performs -[target predicate:element withObject:object] on each object in self.
// Returns an enumerator where -[target predicate:element withObject:object]
// returned YES.
// Predicate must be of form -(BOOL)predicate:(id)element withObject:(id)object.
- (NSEnumerator *)gtm_filteredEnumeratorByTarget:(id)target
performOnEachSelector:(SEL)predicate
withObject:(id)object;
// Performs -[target selector:element] on each object in self.
// Returns an enumerator of the return values of -[target selector:element].
// Selector must be of form -(id)selector:(id)element.
- (NSEnumerator *)gtm_enumeratorByTarget:(id)target
performOnEachSelector:(SEL)selector;
// Performs -[target selector:element withObject:object] on each object in self.
// Returns an enumerator of the return values of
// -[target selector:element withObject:object].
// Selector must be of form -(id)selector:(id)element withObject:(id)object.
- (NSEnumerator *)gtm_enumeratorByTarget:(id)target
performOnEachSelector:(SEL)selector
withObject:(id)object;
@end
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