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88bc80c518
Summary: Following hashing best practices. Reviewed By: shergin Differential Revision: D13827893 fbshipit-source-id: 3786f1e42b176a973890989be7b33efce4825ac6
51 lines
1.2 KiB
C++
51 lines
1.2 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 <folly/Hash.h>
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#include <react/core/LayoutPrimitives.h>
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#include <react/graphics/Geometry.h>
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namespace facebook {
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namespace react {
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/*
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* Unified layout constraints for measuring.
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*/
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struct LayoutConstraints {
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Size minimumSize{0, 0};
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Size maximumSize{kFloatUndefined, kFloatUndefined};
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LayoutDirection layoutDirection{LayoutDirection::Undefined};
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};
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inline bool operator==(
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const LayoutConstraints &lhs,
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const LayoutConstraints &rhs) {
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return std::tie(lhs.minimumSize, lhs.maximumSize, lhs.layoutDirection) ==
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std::tie(rhs.minimumSize, rhs.maximumSize, rhs.layoutDirection);
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}
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} // namespace react
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} // namespace facebook
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namespace std {
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template <>
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struct hash<facebook::react::LayoutConstraints> {
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size_t operator()(
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const facebook::react::LayoutConstraints &constraints) const {
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auto seed = size_t{0};
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folly::hash::hash_combine(
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seed,
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constraints.minimumSize,
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constraints.maximumSize,
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constraints.layoutDirection);
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return seed;
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}
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};
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} // namespace std
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