Replaced default constructors with member assignments

Reviewed By: davidaurelio

Differential Revision: D10466125

fbshipit-source-id: ed92d1e054a8b5b9a6c8c09035173b11da45c368

yoga/YGConfig.cpp

@@ -7,16 +7,4 @@
  */
 #include "YGConfig.h"
 
-const std::array<bool, YGExperimentalFeatureCount>
-    kYGDefaultExperimentalFeatures = {{false}};
-
-YGConfig::YGConfig(YGLogger logger)
-    : experimentalFeatures(kYGDefaultExperimentalFeatures),
-      useWebDefaults(false),
-      useLegacyStretchBehaviour(false),
-      shouldDiffLayoutWithoutLegacyStretchBehaviour(false),
-      pointScaleFactor(1.0f),
-      logger(logger),
-      cloneNodeCallback(nullptr),
-      context(nullptr),
-      printTree(false) {}
+YGConfig::YGConfig(YGLogger logger) : logger(logger) {}

yoga/YGConfig.h

@@ -10,15 +10,15 @@
 #include "Yoga.h"
 
 struct YGConfig {
-  std::array<bool, YGExperimentalFeatureCount> experimentalFeatures;
-  bool useWebDefaults;
-  bool useLegacyStretchBehaviour;
-  bool shouldDiffLayoutWithoutLegacyStretchBehaviour;
-  float pointScaleFactor;
+  std::array<bool, YGExperimentalFeatureCount> experimentalFeatures = {};
+  bool useWebDefaults = false;
+  bool useLegacyStretchBehaviour = false;
+  bool shouldDiffLayoutWithoutLegacyStretchBehaviour = false;
+  float pointScaleFactor = 1.0f;
   YGLogger logger;
-  YGCloneNodeFunc cloneNodeCallback;
-  void* context;
-  bool printTree;
+  YGCloneNodeFunc cloneNodeCallback = nullptr;
+  void* context = nullptr;
+  bool printTree = false;
 
   YGConfig(YGLogger logger);
 };

yoga/YGFloatOptional.h

@@ -9,12 +9,12 @@
 
 struct YGFloatOptional {
  private:
-  float value_;
-  bool isUndefined_;
+  float value_ = 0;
+  bool isUndefined_ = true;
 
  public:
   explicit YGFloatOptional(float value);
-  explicit YGFloatOptional() : value_(0), isUndefined_(true) {}
+  YGFloatOptional() = default;
 
   // Program will terminate if the value of an undefined is accessed. Please
   // make sure to check if the optional is defined before calling this function.

yoga/YGLayout.cpp

@@ -10,28 +10,6 @@
 
 using namespace facebook;
 
-const std::array<float, 2> kYGDefaultDimensionValues = {
-    {YGUndefined, YGUndefined}};
-
-YGLayout::YGLayout()
-    : position(),
-      dimensions(kYGDefaultDimensionValues),
-      margin(),
-      border(),
-      padding(),
-      direction(YGDirectionInherit),
-      computedFlexBasisGeneration(0),
-      computedFlexBasis(YGFloatOptional()),
-      hadOverflow(false),
-      generationCount(0),
-      lastOwnerDirection((YGDirection)-1),
-      nextCachedMeasurementsIndex(0),
-      cachedMeasurements(),
-      measuredDimensions(kYGDefaultDimensionValues),
-      cachedLayout(YGCachedMeasurement()),
-      didUseLegacyFlag(false),
-      doesLegacyStretchFlagAffectsLayout(false) {}
-
 bool YGLayout::operator==(YGLayout layout) const {
   bool isEqual = YGFloatArrayEqual(position, layout.position) &&
       YGFloatArrayEqual(dimensions, layout.dimensions) &&

yoga/YGLayout.h

@@ -9,33 +9,36 @@
 #include "YGFloatOptional.h"
 #include "Yoga-internal.h"
 
-struct YGLayout {
-  std::array<float, 4> position;
-  std::array<float, 2> dimensions;
-  std::array<float, 6> margin;
-  std::array<float, 6> border;
-  std::array<float, 6> padding;
-  YGDirection direction;
+constexpr std::array<float, 2> kYGDefaultDimensionValues = {
+    {YGUndefined, YGUndefined}};
 
-  uint32_t computedFlexBasisGeneration;
-  YGFloatOptional computedFlexBasis;
-  bool hadOverflow;
+struct YGLayout {
+  std::array<float, 4> position = {};
+  std::array<float, 2> dimensions = kYGDefaultDimensionValues;
+  std::array<float, 6> margin = {};
+  std::array<float, 6> border = {};
+  std::array<float, 6> padding = {};
+  YGDirection direction = YGDirectionInherit;
+
+  uint32_t computedFlexBasisGeneration = 0;
+  YGFloatOptional computedFlexBasis = {};
+  bool hadOverflow = false;
 
   // Instead of recomputing the entire layout every single time, we
   // cache some information to break early when nothing changed
-  uint32_t generationCount;
-  YGDirection lastOwnerDirection;
+  uint32_t generationCount = 0;
+  YGDirection lastOwnerDirection = (YGDirection)-1;
 
-  uint32_t nextCachedMeasurementsIndex;
+  uint32_t nextCachedMeasurementsIndex = 0;
   std::array<YGCachedMeasurement, YG_MAX_CACHED_RESULT_COUNT>
-      cachedMeasurements;
-  std::array<float, 2> measuredDimensions;
+      cachedMeasurements = {};
+  std::array<float, 2> measuredDimensions = kYGDefaultDimensionValues;
 
-  YGCachedMeasurement cachedLayout;
-  bool didUseLegacyFlag;
-  bool doesLegacyStretchFlagAffectsLayout;
+  YGCachedMeasurement cachedLayout = YGCachedMeasurement();
+  bool didUseLegacyFlag = false;
+  bool doesLegacyStretchFlagAffectsLayout = false;
 
-  YGLayout();
+  YGLayout() = default;
 
   bool operator==(YGLayout layout) const;
   bool operator!=(YGLayout layout) const {

yoga/YGStyle.cpp

@@ -7,51 +7,6 @@
  */
 #include "YGStyle.h"
 
-const YGValue kYGValueUndefined = {0, YGUnitUndefined};
-
-const YGValue kYGValueAuto = {0, YGUnitAuto};
-
-const std::array<YGValue, YGEdgeCount> kYGDefaultEdgeValuesUnit = {
-    {kYGValueUndefined,
-     kYGValueUndefined,
-     kYGValueUndefined,
-     kYGValueUndefined,
-     kYGValueUndefined,
-     kYGValueUndefined,
-     kYGValueUndefined,
-     kYGValueUndefined,
-     kYGValueUndefined}};
-
-const std::array<YGValue, 2> kYGDefaultDimensionValuesAutoUnit = {
-    {kYGValueAuto, kYGValueAuto}};
-
-const std::array<YGValue, 2> kYGDefaultDimensionValuesUnit = {
-    {kYGValueUndefined, kYGValueUndefined}};
-
-YGStyle::YGStyle()
-    : direction(YGDirectionInherit),
-      flexDirection(YGFlexDirectionColumn),
-      justifyContent(YGJustifyFlexStart),
-      alignContent(YGAlignFlexStart),
-      alignItems(YGAlignStretch),
-      alignSelf(YGAlignAuto),
-      positionType(YGPositionTypeRelative),
-      flexWrap(YGWrapNoWrap),
-      overflow(YGOverflowVisible),
-      display(YGDisplayFlex),
-      flex(YGFloatOptional()),
-      flexGrow(YGFloatOptional()),
-      flexShrink(YGFloatOptional()),
-      flexBasis(kYGValueAuto),
-      margin(kYGDefaultEdgeValuesUnit),
-      position(kYGDefaultEdgeValuesUnit),
-      padding(kYGDefaultEdgeValuesUnit),
-      border(kYGDefaultEdgeValuesUnit),
-      dimensions(kYGDefaultDimensionValuesAutoUnit),
-      minDimensions(kYGDefaultDimensionValuesUnit),
-      maxDimensions(kYGDefaultDimensionValuesUnit),
-      aspectRatio(YGFloatOptional()) {}
-
 // Yoga specific properties, not compatible with flexbox specification
 bool YGStyle::operator==(const YGStyle& style) {
   bool areNonFloatValuesEqual = direction == style.direction &&

yoga/YGStyle.h

@@ -10,34 +10,52 @@
 #include "Yoga-internal.h"
 #include "Yoga.h"
 
+constexpr YGValue kYGValueUndefined = {0, YGUnitUndefined};
+
+constexpr YGValue kYGValueAuto = {0, YGUnitAuto};
+
+constexpr std::array<YGValue, YGEdgeCount> kYGDefaultEdgeValuesUnit = {
+    {kYGValueUndefined,
+     kYGValueUndefined,
+     kYGValueUndefined,
+     kYGValueUndefined,
+     kYGValueUndefined,
+     kYGValueUndefined,
+     kYGValueUndefined,
+     kYGValueUndefined,
+     kYGValueUndefined}};
+
+constexpr std::array<YGValue, 2> kYGDefaultDimensionValuesUnit = {
+    {kYGValueUndefined, kYGValueUndefined}};
+
 struct YGStyle {
   using Dimensions = std::array<YGValue, 2>;
 
-  YGDirection direction;
-  YGFlexDirection flexDirection;
-  YGJustify justifyContent;
-  YGAlign alignContent;
-  YGAlign alignItems;
-  YGAlign alignSelf;
-  YGPositionType positionType;
-  YGWrap flexWrap;
-  YGOverflow overflow;
-  YGDisplay display;
-  YGFloatOptional flex;
-  YGFloatOptional flexGrow;
-  YGFloatOptional flexShrink;
-  YGValue flexBasis;
-  std::array<YGValue, YGEdgeCount> margin;
-  std::array<YGValue, YGEdgeCount> position;
-  std::array<YGValue, YGEdgeCount> padding;
-  std::array<YGValue, YGEdgeCount> border;
-  Dimensions dimensions;
-  Dimensions minDimensions;
-  Dimensions maxDimensions;
+  YGDirection direction = YGDirectionInherit;
+  YGFlexDirection flexDirection = YGFlexDirectionColumn;
+  YGJustify justifyContent = YGJustifyFlexStart;
+  YGAlign alignContent = YGAlignFlexStart;
+  YGAlign alignItems = YGAlignStretch;
+  YGAlign alignSelf = YGAlignAuto;
+  YGPositionType positionType = YGPositionTypeRelative;
+  YGWrap flexWrap = YGWrapNoWrap;
+  YGOverflow overflow = YGOverflowVisible;
+  YGDisplay display = YGDisplayFlex;
+  YGFloatOptional flex = {};
+  YGFloatOptional flexGrow = {};
+  YGFloatOptional flexShrink = {};
+  YGValue flexBasis = kYGValueAuto;
+  std::array<YGValue, YGEdgeCount> margin = kYGDefaultEdgeValuesUnit;
+  std::array<YGValue, YGEdgeCount> position = kYGDefaultEdgeValuesUnit;
+  std::array<YGValue, YGEdgeCount> padding = kYGDefaultEdgeValuesUnit;
+  std::array<YGValue, YGEdgeCount> border = kYGDefaultEdgeValuesUnit;
+  Dimensions dimensions = {{kYGValueAuto, kYGValueAuto}};
+  Dimensions minDimensions = kYGDefaultDimensionValuesUnit;
+  Dimensions maxDimensions = kYGDefaultDimensionValuesUnit;
   // Yoga specific properties, not compatible with flexbox specification
-  YGFloatOptional aspectRatio;
+  YGFloatOptional aspectRatio = {};
 
-  YGStyle();
+  YGStyle() = default;
   bool operator==(const YGStyle& style);
 
   bool operator!=(YGStyle style) {