59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
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/**
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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 LICENSE
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* file in the root directory of this source tree.
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*/
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#pragma once
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#include <cmath>
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#include <limits>
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#include "Yoga-internal.h"
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struct YGFloatOptional {
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private:
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float value_ = std::numeric_limits<float>::quiet_NaN();
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public:
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explicit constexpr YGFloatOptional(float value) : value_(value) {}
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constexpr YGFloatOptional() = default;
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// returns the wrapped value, or a value x with YGIsUndefined(x) == true
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constexpr float unwrap() const {
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return value_;
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}
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bool isUndefined() const {
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return std::isnan(value_);
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}
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YGFloatOptional operator+(YGFloatOptional op) const {
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return YGFloatOptional{value_ + op.value_};
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}
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bool operator>(YGFloatOptional op) const {
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return value_ > op.value_;
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}
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bool operator<(YGFloatOptional op) const {
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return value_ < op.value_;
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}
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bool operator>=(YGFloatOptional op) const {
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return *this > op || *this == op;
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}
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bool operator<=(YGFloatOptional op) const {
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return *this < op || *this == op;
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}
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bool operator==(YGFloatOptional op) const {
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return value_ == op.value_ || (isUndefined() && op.isUndefined());
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}
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bool operator!=(YGFloatOptional op) const {
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return !(*this == op);
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}
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bool operator==(float val) const {
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return value_ == val || (isUndefined() && yoga::isUndefined(val));
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}
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bool operator!=(float val) const {
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return !(*this == val);
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}
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};
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