虚幻4 蓝图被编译成的蓝图汇编代码
\Engine\Source\Editor\KismetCompiler\Public\BlueprintCompiledStatement.h
//////////////////////////////////////////////////////////////////////////
// FBlueprintCompiledStatement
enum EKismetCompiledStatementType
{
KCST_Nop = 0,
KCST_CallFunction = 1, // [wiring =] TargetObject->FunctionToCall(wiring)
KCST_Assignment = 2, // TargetObject->TargetProperty = [wiring]
KCST_CompileError = 3, // One of the other types with a compilation error during statement generation
KCST_UnconditionalGoto = 4, // goto TargetLabel
KCST_PushState = 5, // FlowStack.Push(TargetLabel)
KCST_GotoIfNot = 6, // [if (!TargetObject->TargetProperty)] goto TargetLabel
KCST_Return = 7, // return TargetObject->TargetProperty
KCST_EndOfThread = 8, // if (FlowStack.Num()) { NextState = FlowStack.Pop; } else { return; }
KCST_Comment = 9, // /* Comment */
KCST_ComputedGoto = 10, // NextState = LHS;
KCST_EndOfThreadIfNot = 11, // [if (!TargetObject->TargetProperty)] { same as KCST_EndOfThread; }
KCST_DebugSite = 12, // NOP with recorded address
KCST_CastObjToInterface = 13, // TargetInterface(TargetObject)
KCST_DynamicCast = 14, // Cast(TargetObject)
KCST_ObjectToBool = 15, // (TargetObject != None)
KCST_AddMulticastDelegate = 16, // TargetDelegate->Add(EventDelegate)
KCST_ClearMulticastDelegate = 17, // TargetDelegate->Clear()
KCST_WireTraceSite = 18, // NOP with recorded address (never a step target)
KCST_BindDelegate = 19, // Creates simple delegate
KCST_RemoveMulticastDelegate = 20, // TargetDelegate->Remove(EventDelegate)
KCST_CallDelegate = 21, // TargetDelegate->Broadcast(...)
KCST_CreateArray = 22, // Creates and sets an array literal term
KCST_CrossInterfaceCast = 23, // TargetInterface(Interface)
KCST_MetaCast = 24, // Cast(TargetObject)
KCST_AssignmentOnPersistentFrame = 25, //
KCST_CastInterfaceToObj = 26, // Cast(TargetInterface)
KCST_GotoReturn = 27, // goto ReturnLabel
KCST_GotoReturnIfNot = 28, // [if (!TargetObject->TargetProperty)] goto TargetLabel
KCST_SwitchValue = 29,
// Kismet instrumentation extensions
KCST_InstrumentedPureNodeEntry, // Instrumented pure node entry
KCST_InstrumentedWireEntry, // Instrumented wiretrace entry
KCST_InstrumentedWireExit, // Instrumented wiretrace exit
KCST_InstrumentedStatePush, // Instrumented state push
KCST_InstrumentedStateRestore, // Instrumented state restore
KCST_InstrumentedStateReset, // Instrumented state reset
KCST_InstrumentedStateSuspend, // Instrumented state suspend
KCST_InstrumentedStatePop, // Instrumented state pop
//
KCST_ArrayGetByRef,
}; C++最后编译为汇编，蓝图最后编译的字节码 可以叫 蓝图汇编，所有的功能编译为下面的这个枚举所列举的功能。
\Engine\Source\Runtime\CoreUObject\Public\UObject\Script.h
使用
IMPLEMENT_VM_FUNCTION
宏在解释函数数组中填充函数，然后编译完成的字节码直接作为下标，在函数数组中取出函数执行。
//
// Evaluatable expression item types.
//
enum EExprToken
{
// Variable references.
EX_LocalVariable = 0x00, // A local variable.
EX_InstanceVariable = 0x01, // An object variable.
EX_DefaultVariable = 0x02, // Default variable for a class context.
// = 0x03,
EX_Return = 0x04, // Return from function.
// = 0x05,
EX_Jump = 0x06, // Goto a local address in code.
EX_JumpIfNot = 0x07, // Goto if not expression.
// = 0x08,
EX_Assert = 0x09, // Assertion.
// = 0x0A,
EX_Nothing = 0x0B, // No operation.
// = 0x0C,
// = 0x0D,
// = 0x0E,
EX_Let = 0x0F, // Assign an arbitrary size value to a variable.
// = 0x10,
// = 0x11,
EX_ClassContext = 0x12, // Class default object context.
EX_MetaCast = 0x13, // Metaclass cast.
EX_LetBool = 0x14, // Let boolean variable.
EX_EndParmValue = 0x15, // end of default value for optional function parameter
EX_EndFunctionParms = 0x16, // End of function call parameters.
EX_Self = 0x17, // Self object.
EX_Skip = 0x18, // Skippable expression.
EX_Context = 0x19, // Call a function through an object context.
EX_Context_FailSilent = 0x1A, // Call a function through an object context (can fail silently if the context is NULL; only generated for functions that don't have output or return values).
EX_VirtualFunction = 0x1B, // A function call with parameters.
EX_FinalFunction = 0x1C, // A prebound function call with parameters.
EX_IntConst = 0x1D, // Int constant.
EX_FloatConst = 0x1E, // Floating point constant.
EX_StringConst = 0x1F, // String constant.
EX_ObjectConst = 0x20, // An object constant.
EX_NameConst = 0x21, // A name constant.
EX_RotationConst = 0x22, // A rotation constant.
EX_VectorConst = 0x23, // A vector constant.
EX_ByteConst = 0x24, // A byte constant.
EX_IntZero = 0x25, // Zero.
EX_IntOne = 0x26, // One.
EX_True = 0x27, // Bool True.
EX_False = 0x28, // Bool False.
EX_TextConst = 0x29, // FText constant
EX_NoObject = 0x2A, // NoObject.
EX_TransformConst = 0x2B, // A transform constant
EX_IntConstByte = 0x2C, // Int constant that requires 1 byte.
EX_NoInterface = 0x2D, // A null interface (similar to EX_NoObject, but for interfaces)
EX_DynamicCast = 0x2E, // Safe dynamic class casting.
EX_StructConst = 0x2F, // An arbitrary UStruct constant
EX_EndStructConst = 0x30, // End of UStruct constant
EX_SetArray = 0x31, // Set the value of arbitrary array
EX_EndArray = 0x32,
// = 0x33,
EX_UnicodeStringConst = 0x34, // Unicode string constant.
EX_Int64Const = 0x35, // 64-bit integer constant.
EX_UInt64Const = 0x36, // 64-bit unsigned integer constant.
// = 0x37,
EX_PrimitiveCast = 0x38, // A casting operator for primitives which reads the type as the subsequent byte
// = 0x39,
// = 0x3A,
// = 0x3B,
// = 0x3C,
// = 0x3D,
// = 0x3E,
// = 0x3F,
// = 0x40,
// = 0x41,
EX_StructMemberContext = 0x42, // Context expression to address a property within a struct
EX_LetMulticastDelegate = 0x43, // Assignment to a multi-cast delegate
EX_LetDelegate = 0x44, // Assignment to a delegate
// = 0x45,
// = 0x46, // CST_ObjectToInterface
// = 0x47, // CST_ObjectToBool
EX_LocalOutVariable = 0x48, // local out (pass by reference) function parameter
// = 0x49, // CST_InterfaceToBool
EX_DeprecatedOp4A = 0x4A,
EX_InstanceDelegate = 0x4B, // const reference to a delegate or normal function object
EX_PushExecutionFlow = 0x4C, // push an address on to the execution flow stack for future execution when a EX_PopExecutionFlow is executed. Execution continues on normally and doesn't change to the pushed address.
EX_PopExecutionFlow = 0x4D, // continue execution at the last address previously pushed onto the execution flow stack.
EX_ComputedJump = 0x4E, // Goto a local address in code, specified by an integer value.
EX_PopExecutionFlowIfNot = 0x4F, // continue execution at the last address previously pushed onto the execution flow stack, if the condition is not true.
EX_Breakpoint = 0x50, // Breakpoint. Only observed in the editor, otherwise it behaves like EX_Nothing.
EX_InterfaceContext = 0x51, // Call a function through a native interface variable
EX_ObjToInterfaceCast = 0x52, // Converting an object reference to native interface variable
EX_EndOfScript = 0x53, // Last byte in script code
EX_CrossInterfaceCast = 0x54, // Converting an interface variable reference to native interface variable
EX_InterfaceToObjCast = 0x55, // Converting an interface variable reference to an object
// = 0x56,
// = 0x57,
// = 0x58,
// = 0x59,
EX_WireTracepoint = 0x5A, // Trace point. Only observed in the editor, otherwise it behaves like EX_Nothing.
EX_SkipOffsetConst = 0x5B, // A CodeSizeSkipOffset constant
EX_AddMulticastDelegate = 0x5C, // Adds a delegate to a multicast delegate's targets
EX_ClearMulticastDelegate = 0x5D, // Clears all delegates in a multicast target
EX_Tracepoint = 0x5E, // Trace point. Only observed in the editor, otherwise it behaves like EX_Nothing.
EX_LetObj = 0x5F, // assign to any object ref pointer
EX_LetWeakObjPtr = 0x60, // assign to a weak object pointer
EX_BindDelegate = 0x61, // bind object and name to delegate
EX_RemoveMulticastDelegate = 0x62, // Remove a delegate from a multicast delegate's targets
EX_CallMulticastDelegate = 0x63, // Call multicast delegate
EX_LetValueOnPersistentFrame = 0x64,
EX_ArrayConst = 0x65,
EX_EndArrayConst = 0x66,
EX_AssetConst = 0x67,
EX_CallMath = 0x68, // static pure function from on local call space
EX_SwitchValue = 0x69,
EX_InstrumentationEvent = 0x6A, // Instrumentation event
EX_ArrayGetByRef = 0x6B,
EX_Max = 0x100,
};