mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Andres Suarez
8bd3edec88
Reviewed By: aaronabramov Differential Revision: D33367752 fbshipit-source-id: 4ce94d184485e5ee0a62cf67ad2d3ba16e285c8f
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and 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 <limits>
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namespace facebook {
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namespace react {
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/*
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* Type used to represent an index of some stored values in small arrays.
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*/
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using RawPropsValueIndex = uint8_t;
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static_assert(
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sizeof(RawPropsValueIndex) == 1,
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"RawPropsValueIndex must be one byte size.");
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using RawPropsPropNameLength = uint8_t;
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/*
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* The number which is *usually* bigger than a number of explicitly specified
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* props for some component.
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*/
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constexpr static int kNumberOfExplicitlySpecifedPropsSoftCap = 16;
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/*
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* Special value of `RawPropsValueIndex` which is used to represent `no value`.
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*/
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constexpr static RawPropsValueIndex kRawPropsValueIndexEmpty =
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std::numeric_limits<RawPropsValueIndex>::max();
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/*
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* The number of props that usually more than `*Props` classes have.
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* Should be roughly equal to the number of props inside `ViewProps` plus
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* about twenty. It's okay if some `*Props` class has more than this amount of
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* props but the majority of those classes should be below this cap.
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*/
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constexpr static auto kNumberOfPropsPerComponentSoftCap = 150;
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/*
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* The maximum length of the prop name.
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* To process prop names efficiently we have to allocate the memory statically,
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* therefore we have to have a hard limit.
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* Can be increased up to 254.
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*/
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constexpr static auto kPropNameLengthHardCap = 64;
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} // namespace react
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} // namespace facebook
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