VVMOption.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#if WITH_VERSE_VM || defined(__INTELLISENSE__)
 
#include "CoreTypes.h"
#include "Misc/AssertionMacros.h"
#include "VVMContext.h"
#include "VVMGlobalTrivialEmergentTypePtr.h"
#include "VVMType.h"
#include "VVMValue.h"
 
namespace Verse
{
enum class EValueStringFormat;
 
// Inherits from VType because true, which is option{false}, is a type.
struct VOption : VType
{
    DECLARE_DERIVED_VCPPCLASSINFO(COREUOBJECT_API, VType);
    COREUOBJECT_API static TGlobalTrivialEmergentTypePtr<&StaticCppClassInfo> GlobalTrivialEmergentType;
 
    static VOption& New(FAllocationContext Context, VValue InValue)
    {
        return *new (Context.AllocateFastCell(sizeof(VOption))) VOption(Context, InValue);
    }
 
    VValue GetValue() const
    {
        return Value.Get().Follow();
    }
 
    void SetValue(FAllocationContext Context, VValue InValue)
    {
        check(!InValue.IsUninitialized());
        Value.Set(Context, InValue);
    }
 
    COREUOBJECT_API uint32 GetTypeHashImpl();
    void VisitMembersImpl(FAllocationContext Context, FDebuggerVisitor& Visitor);
    void AppendToStringImpl(FAllocationContext Context, FUtf8StringBuilderBase& Builder, EValueStringFormat Format, TSet<const void*>& VisitedObjects, uint32 RecursionDepth);
    COREUOBJECT_API TSharedPtr<FJsonValue> ToJSONImpl(FRunningContext Context, EValueJSONFormat Format, TMap<const void*, EVisitState>& VisitedObjects, const VerseVMToJsonCallback& Callback, uint32 RecursionDepth, FJsonObject* Defs);
 
    static constexpr bool SerializeIdentity = false;
    static void SerializeLayout(FAllocationContext Context, VOption*& This, FStructuredArchiveVisitor& Visitor);
    void SerializeImpl(FAllocationContext Context, FStructuredArchiveVisitor& Visitor);
 
private:
    VOption(FAllocationContext Context, VValue InValue)
        : VType(Context, &GlobalTrivialEmergentType.Get(Context))
        , Value(Context, InValue)
    {
    }
 
    TWriteBarrier<VValue> Value;
};
 
} // namespace Verse
#endif // WITH_VERSE_VM