firebase-ios-sdk/GoogleUtilitiesComponents/Sources/Public/GULCCComponentContainer.h

/*
 * Copyright 2019 Google
 *
 * 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>

#import "GULCCComponentType.h"
#import "GULCCLibrary.h"

NS_ASSUME_NONNULL_BEGIN

/// A type-safe macro to retrieve a component from a container. This should be used to retrieve
/// components instead of using the container directly.
#define GUL_COMPONENT(type, container) \
  [GULCCComponentType<id<type>> instanceForProtocol:@protocol(type) inContainer:container]

/// A container that holds different components that are registered via the
/// `registerAsComponentRegistrant:` call. These classes should conform to
/// `GULCCComponentRegistrant` in order to properly register components for the container.
NS_SWIFT_NAME(GoogleComponentContainer)
@interface GULCCComponentContainer : NSObject

/// A weak reference to an object that may provide context for the container.
@property(nonatomic, nullable, weak, readonly) id context;

- (instancetype)init NS_UNAVAILABLE;

@end

NS_ASSUME_NONNULL_END