26 lines
845 B
Objective-C
26 lines
845 B
Objective-C
/*
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* Copyright (c) 2014, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#import <Foundation/Foundation.h>
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#pragma once
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/**
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This exists to use along with `BFTask` and `BFTaskCompletionSource`.
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Instead of returning a `BFTask` with no generic type, or a generic type of 'NSNull'
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when there is no usable result from a task, we use the type 'BFVoid', which will always have a value of `nil`.
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This allows you to provide a more enforced API contract to the caller,
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as sending any message to `BFVoid` will result in a compile time error.
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*/
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@class _BFVoid_Nonexistant;
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typedef _BFVoid_Nonexistant *BFVoid;
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