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53 lines
1.8 KiB
53 lines
1.8 KiB
/* |
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* Copyright 2017 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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/** |
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* Placeholder values you may write into Firebase Database as a value or |
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* priority that will automatically be populated by the Firebase Database |
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* server. |
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*/ |
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NS_SWIFT_NAME(ServerValue) |
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@interface FIRServerValue : NSObject |
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/** |
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* Placeholder value for the number of milliseconds since the Unix epoch |
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*/ |
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+ (NSDictionary *)timestamp; |
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/** |
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* Returns a placeholder value that can be used to atomically increment the |
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* current database value by the provided delta. |
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* |
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* The delta must be a long or double value. If the current value is not an |
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* integer or double, or if the data does not yet exist, the transformation will |
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* set the data to the delta value. If either of the delta value or the existing |
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* data are doubles, both values will be interpreted as doubles. Double |
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* arithmetic and representation of double values follow IEEE 754 semantics. If |
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* there is positive/negative integer overflow, the sum is calculated as a |
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* double. |
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* |
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* @param delta the amount to modify the current value atomically. |
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* @return a placeholder value for modifying data atomically server-side. |
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*/ |
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+ (NSDictionary *)increment:(NSNumber *)delta NS_SWIFT_NAME(increment(_:)); |
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@end |
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NS_ASSUME_NONNULL_END
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