67 lines
1.2 KiB
C
67 lines
1.2 KiB
C
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// Copyright 2020 Phyronnaz
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#pragma once
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#include "CoreMinimal.h"
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// Base class for blueprint structs that hold a pointer to a big implementation struct that's expensive to copy around
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template<typename T>
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struct TVoxelSaveStruct
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{
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public:
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bool operator==(const TVoxelSaveStruct<T>& Other) const
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{
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return Impl == Other.Impl || *Impl == *Other.Impl;
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}
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bool Serialize(FArchive& Ar)
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{
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if (Ar.IsLoading())
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{
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// If we're going to write, create a new impl
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Impl = MakeShared<T>();
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}
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return Impl->Serialize(Ar);
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}
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const T& Const() const
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{
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return *Impl;
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}
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// Copies the data over from old impl
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T& Mutable()
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{
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if (Impl.IsUnique())
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{
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return *Impl;
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}
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else
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{
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Impl = MakeShared<T>(*Impl);
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return *Impl;
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}
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}
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// Does not copy over the old impl data
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T& NewMutable()
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{
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Impl = MakeShared<T>();
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return *Impl;
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}
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private:
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TSharedRef<T> Impl = MakeShared<T>();
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};
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#define DEFINE_VOXEL_SAVE_STRUCT(Name) \
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inline FArchive& operator<<(FArchive& Ar, Name& Save) \
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{ \
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Save.Serialize(Ar); \
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return Ar; \
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} \
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template<> \
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struct TStructOpsTypeTraits<Name> : public TStructOpsTypeTraitsBase2<Name> \
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{ \
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enum \
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{ \
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WithSerializer = true, \
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WithIdenticalViaEquality = true \
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}; \
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};
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