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/*
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* Copyright 2018 Google
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import <Foundation/Foundation.h>
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NS_ASSUME_NONNULL_BEGIN
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/// A dependency on a specific protocol's functionality.
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NS_SWIFT_NAME(Dependency)
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@interface FIRDependency : NSObject
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/// The protocol describing functionality being depended on.
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@property(nonatomic, strong, readonly) Protocol *protocol;
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/// A flag to specify if the dependency is required or not.
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@property(nonatomic, readonly) BOOL isRequired;
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/// Initializes a dependency that is required. Calls `init(protocol:isRequired:)` with true for
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/// the required parameter.
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/// Creates a required dependency on the specified protocol's functionality.
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+ (instancetype)dependencyWithProtocol:(Protocol *)protocol;
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/// Creates a dependency on the specified protocol's functionality and specify if it's required for
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/// the class's functionality.
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+ (instancetype)dependencyWithProtocol:(Protocol *)protocol isRequired:(BOOL)required;
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/// Use `init(withProtocol:isRequired:)` instead.
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- (instancetype)init NS_UNAVAILABLE;
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@end
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NS_ASSUME_NONNULL_END
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