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