mirror of
https://github.com/zhigang1992/react-native.git
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e5feb0cee3
Summary: Previously, all placeholders methods have return type `SomeType &` which is not correct because it allows the called to modify enclosed `static` value of the placeholders; the type should be `SomeType const &`. Besides that this diff migrates some type aliases to the new style (which makes evething much prettier and readable). Reviewed By: mdvacca Differential Revision: D14819076 fbshipit-source-id: 87e68d546f16d7a9ad1fb65e1b238859f9381eb7
52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include <react/core/EventEmitter.h>
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#include <react/core/LocalData.h>
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#include <react/core/Props.h>
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#include <react/core/ReactPrimitives.h>
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#include <react/core/ShadowNode.h>
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#include <react/core/State.h>
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namespace facebook {
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namespace react {
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/*
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* An object which supposed to be used as a parameter specifying a shape
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* of created or cloned ShadowNode.
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* Note: Most of the fields are `const &` references (essentially just raw
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* pointers) which means that the Fragment does not copy/store them nor
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* retain ownership of them.
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*/
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struct ShadowNodeFragment {
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Tag const tag = tagPlaceholder();
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SurfaceId const rootTag = surfaceIdPlaceholder();
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Props::Shared const &props = propsPlaceholder();
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EventEmitter::Shared const &eventEmitter = eventEmitterPlaceholder();
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ShadowNode::SharedListOfShared const &children = childrenPlaceholder();
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LocalData::Shared const &localData = localDataPlaceholder();
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State::Shared const &state = statePlaceholder();
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/*
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* Placeholders.
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* Use as default arguments as an indication that the field does not need to
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* be changed.
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*/
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static Tag const tagPlaceholder();
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static SurfaceId const surfaceIdPlaceholder();
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static Props::Shared const &propsPlaceholder();
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static EventEmitter::Shared const &eventEmitterPlaceholder();
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static ShadowNode::SharedListOfShared const &childrenPlaceholder();
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static LocalData::Shared const &localDataPlaceholder();
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static State::Shared const &statePlaceholder();
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};
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} // namespace react
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} // namespace facebook
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