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64 lines
2.4 KiB
64 lines
2.4 KiB
4 years ago
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/**
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Copyright 2018 Google Inc. All rights reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 "FBLPromise.h"
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NS_ASSUME_NONNULL_BEGIN
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@interface FBLPromise<Value>(ThenAdditions)
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typedef id __nullable (^FBLPromiseThenWorkBlock)(Value __nullable value) NS_SWIFT_UNAVAILABLE("");
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/**
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Creates a pending promise which eventually gets resolved with resolution returned from `work`
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block: either value, error or another promise. The `work` block is executed asynchronously only
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when the receiver is fulfilled. If receiver is rejected, the returned promise is also rejected with
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the same error.
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@param work A block to handle the value that receiver was fulfilled with.
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@return A new pending promise to be resolved with resolution returned from the `work` block.
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*/
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- (FBLPromise *)then:(FBLPromiseThenWorkBlock)work NS_SWIFT_UNAVAILABLE("");
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/**
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Creates a pending promise which eventually gets resolved with resolution returned from `work`
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block: either value, error or another promise. The `work` block is executed asynchronously when the
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receiver is fulfilled. If receiver is rejected, the returned promise is also rejected with the same
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error.
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@param queue A queue to invoke the `work` block on.
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@param work A block to handle the value that receiver was fulfilled with.
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@return A new pending promise to be resolved with resolution returned from the `work` block.
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*/
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- (FBLPromise *)onQueue:(dispatch_queue_t)queue
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then:(FBLPromiseThenWorkBlock)work NS_REFINED_FOR_SWIFT;
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@end
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/**
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Convenience dot-syntax wrappers for `FBLPromise` `then` operators.
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Usage: promise.then(^id(id value) { ... })
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*/
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@interface FBLPromise<Value>(DotSyntax_ThenAdditions)
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- (FBLPromise* (^)(FBLPromiseThenWorkBlock))then FBL_PROMISES_DOT_SYNTAX NS_SWIFT_UNAVAILABLE("");
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- (FBLPromise* (^)(dispatch_queue_t, FBLPromiseThenWorkBlock))thenOn FBL_PROMISES_DOT_SYNTAX
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NS_SWIFT_UNAVAILABLE("");
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@end
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NS_ASSUME_NONNULL_END
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