Make View conversion headers Apple warning-clean

Summary:
Make public View and CSS conversion headers compile under Apple's -Wswitch-enum and -Wswitch-default policies. Add explicit safe defaults for exhaustive enum conversions and narrowly suppress -Wswitch-enum for the intentionally partial CSSLength token parser.

Changelog:
[Internal].

Differential Revision: D120154654

Author: coado

packages/react-native/ReactCommon/react/renderer/components/view/accessibilityPropsConversions.h

@@ -182,6 +182,10 @@ inline std::string toString(const ImportantForAccessibility &importantForAccessi
       return "no";
     case ImportantForAccessibility::NoHideDescendants:
       return "no-hide-descendants";
+    default:
+      LOG(ERROR) << "Unsupported ImportantForAccessibility value: " << static_cast<int>(importantForAccessibility);
+      react_native_expect(false);
+      return "auto";
   }
 }
 
@@ -372,12 +376,12 @@ inline std::string toString(const AccessibilityRole &accessibilityRole)
       return "slidingdrawer";
     case AccessibilityRole::Iconmenu:
       return "iconmenu";
+    default:
+      LOG(ERROR) << "Unsupported AccessibilityRole value: " << static_cast<int>(accessibilityRole);
+      react_native_expect(false);
+      // sane default for prod
+      return "none";
   }
-
-  LOG(ERROR) << "Unsupported AccessibilityRole value";
-  react_native_expect(false);
-  // sane default for prod
-  return "none";
 }
 
 inline void fromRawValue(const PropsParserContext &context, const RawValue &value, AccessibilityRole &result)
@@ -613,12 +617,12 @@ inline std::string toString(const Role &role)
       return "treegrid";
     case Role::Treeitem:
       return "treeitem";
+    default:
+      LOG(ERROR) << "Unsupported Role value: " << static_cast<int>(role);
+      react_native_expect(false);
+      // sane default for prod
+      return "none";
   }
-
-  LOG(ERROR) << "Unsupported Role value";
-  react_native_expect(false);
-  // sane default for prod
-  return "none";
 }
 
 inline void fromRawValue(const PropsParserContext &context, const RawValue &value, Role &result)
@@ -780,6 +784,10 @@ inline std::string toString(AccessibilityLiveRegion accessibilityLiveRegion)
       return "polite";
     case AccessibilityLiveRegion::Assertive:
       return "assertive";
+    default:
+      LOG(ERROR) << "Unsupported AccessibilityLiveRegion value: " << static_cast<int>(accessibilityLiveRegion);
+      react_native_expect(false);
+      return "none";
   }
 }
 
@@ -795,6 +803,10 @@ inline std::string toString(AccessibilityState::CheckedState state)
       return "Mixed";
     case AccessibilityState::None:
       return "None";
+    default:
+      LOG(ERROR) << "Unsupported AccessibilityState::CheckedState value: " << static_cast<int>(state);
+      react_native_expect(false);
+      return "None";
   }
 }
 

packages/react-native/ReactCommon/react/renderer/components/view/conversions.h

@@ -124,6 +124,10 @@ static inline PositionType positionTypeFromYogaPositionType(yoga::PositionType p
       return PositionType::Relative;
     case yoga::PositionType::Absolute:
       return PositionType::Absolute;
+    default:
+      LOG(ERROR) << "Unexpected yoga::PositionType value: " << static_cast<int>(positionType);
+      react_native_expect(false);
+      return PositionType::Relative;
   }
 }
 
@@ -138,6 +142,10 @@ inline DisplayType displayTypeFromYGDisplay(YGDisplay display)
       return DisplayType::Flex;
     case YGDisplayGrid:
       return DisplayType::Grid;
+    default:
+      LOG(ERROR) << "Unexpected YGDisplay value: " << static_cast<int>(display);
+      react_native_expect(false);
+      return DisplayType::Flex;
   }
 }
 
@@ -185,6 +193,10 @@ inline YGDirection yogaDirectionFromLayoutDirection(LayoutDirection direction)
       return YGDirectionLTR;
     case LayoutDirection::RightToLeft:
       return YGDirectionRTL;
+    default:
+      LOG(ERROR) << "Unexpected LayoutDirection value: " << static_cast<int>(direction);
+      react_native_expect(false);
+      return YGDirectionInherit;
   }
 }
 
@@ -1113,6 +1125,10 @@ inline std::string toString(PointerEventsMode value)
       return "box-none";
     case PointerEventsMode::BoxOnly:
       return "box-only";
+    default:
+      LOG(ERROR) << "Unsupported PointerEventsMode value: " << static_cast<int>(value);
+      react_native_expect(false);
+      return "auto";
   }
 }
 
@@ -1695,6 +1711,10 @@ inline std::string toString(const LayoutConformance &value)
       return "strict";
     case LayoutConformance::Compatibility:
       return "compatibility";
+    default:
+      LOG(ERROR) << "Unsupported LayoutConformance value: " << static_cast<int>(value);
+      react_native_expect(false);
+      return "strict";
   }
 }
 
@@ -1774,6 +1794,10 @@ inline std::string toString(const Transform &transform)
         result += "{\"identity\": true}";
         break;
       }
+      default:
+        LOG(ERROR) << "Unsupported TransformOperationType value: " << static_cast<int>(operation.type);
+        react_native_expect(false);
+        break;
     }
   }
 

packages/react-native/ReactCommon/react/renderer/css/CSSLength.h

@@ -31,7 +31,14 @@ template <>
 struct CSSDataTypeParser<CSSLength> {
   static constexpr auto consumePreservedToken(const CSSPreservedToken &token) -> std::optional<CSSLength>
   {
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wswitch-enum"
+#endif
     switch (token.type()) {
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
       case CSSTokenType::Dimension:
         if (auto unit = parseCSSLengthUnit(token.unit())) {
           return CSSLength{.value = token.numericValue(), .unit = *unit};

packages/react-native/ReactCommon/react/renderer/css/CSSTransformOrigin.h

@@ -195,9 +195,9 @@ struct CSSDataTypeParser<CSSTransformOrigin> {
         return CSSPercentage{100.0f};
       case CSSTransformOriginKeyword::Bottom:
         return CSSPercentage{100.0f};
+      default:
+        return {};
     }
-
-    return {};
   }
 };