split project with app & doric module

doric-Qt/example/doric/yoga/YGFloatOptional.h

@@ -0,0 +1,70 @@
+/*
+ * 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_); }
+};
+
+// operators take YGFloatOptional by value, as it is a 32bit value
+
+inline bool operator==(YGFloatOptional lhs, YGFloatOptional rhs) {
+  return lhs.unwrap() == rhs.unwrap() ||
+      (lhs.isUndefined() && rhs.isUndefined());
+}
+inline bool operator!=(YGFloatOptional lhs, YGFloatOptional rhs) {
+  return !(lhs == rhs);
+}
+
+inline bool operator==(YGFloatOptional lhs, float rhs) {
+  return lhs == YGFloatOptional{rhs};
+}
+inline bool operator!=(YGFloatOptional lhs, float rhs) {
+  return !(lhs == rhs);
+}
+
+inline bool operator==(float lhs, YGFloatOptional rhs) {
+  return rhs == lhs;
+}
+inline bool operator!=(float lhs, YGFloatOptional rhs) {
+  return !(lhs == rhs);
+}
+
+inline YGFloatOptional operator+(YGFloatOptional lhs, YGFloatOptional rhs) {
+  return YGFloatOptional{lhs.unwrap() + rhs.unwrap()};
+}
+
+inline bool operator>(YGFloatOptional lhs, YGFloatOptional rhs) {
+  return lhs.unwrap() > rhs.unwrap();
+}
+
+inline bool operator<(YGFloatOptional lhs, YGFloatOptional rhs) {
+  return lhs.unwrap() < rhs.unwrap();
+}
+
+inline bool operator>=(YGFloatOptional lhs, YGFloatOptional rhs) {
+  return lhs > rhs || lhs == rhs;
+}
+
+inline bool operator<=(YGFloatOptional lhs, YGFloatOptional rhs) {
+  return lhs < rhs || lhs == rhs;
+}