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fix(unreal): macOS build failure — Nil macro collision with Objective-C++ #4712

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fix(unreal): macOS build failure — Nil macro collision with Objective-C++ #4712

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17 changes: 15 additions & 2 deletions sdks/unreal/src/SpacetimeDbSdk/Source/SpacetimeDbSdk/Public/Types/Builtins.h
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,14 @@
#include "Kismet/BlueprintFunctionLibrary.h"
#include "Builtins.generated.h"


// macOS/Objective-C++ defines Nil as a macro (#define Nil nullptr in objc/objc.h).
// Unreal Engine compiles as Objective-C++ on Apple platforms, causing FSpacetimeDBUuid::Nil()
// to fail with "expected member name or ';' after declaration specifiers".
#ifdef Nil
#define SPACETIMEDB_NIL_MACRO_SAVED
#pragma push_macro("Nil")
#undef Nil
#endif

/**Compression algorithms supported by SpacetimeDB for data storage and transmission. */
UENUM(BlueprintType)
Expand Down Expand Up @@ -1081,4 +1088,10 @@ class SPACETIMEDBSDK_API USpacetimeDBUuidLibrary : public UBlueprintFunctionLibr
{
return FSpacetimeDBUuid(Guid);
}
};
};

// Restore macOS/Objective-C++ Nil macro
#ifdef SPACETIMEDB_NIL_MACRO_SAVED
#pragma pop_macro("Nil")
#undef SPACETIMEDB_NIL_MACRO_SAVED
#endif