System.Rtti.TValue
Delphi
TValue = record
C++
struct __declspec(delphirecord) TValue
{
private:
static TValue FEmpty;
private:
private:
bool __fastcall GetIsEmpty();
System::Typinfo::PTypeInfo __fastcall GetTypeInfo();
System::Typinfo::TTypeKind __fastcall GetTypeKind();
System::Typinfo::PTypeData __fastcall GetTypeDataProp();
int __fastcall GetDataSize();
static void __fastcall InitData(TValue &AValue);
static TValue __fastcall Create(System::Typinfo::PTypeInfo ATypeInfo);
static TValue __fastcall GetEmpty();
bool __fastcall TryAsTypeInternal(void *AResult, System::Typinfo::PTypeInfo ATypeInfo, const bool EmptyAsAnyType = true);
void __fastcall AsTypeInternal(void *AResult, void * ATypeInfo);
public:
static TValue __fastcall _op_Implicit(const System::UnicodeString Value);
static TValue __fastcall _op_Implicit(int Value);
static TValue __fastcall _op_Implicit(unsigned Value);
static TValue __fastcall _op_Implicit(float Value);
static TValue __fastcall _op_Implicit(double Value);
static TValue __fastcall _op_Implicit(System::Extended Value);
static TValue __fastcall _op_Implicit(System::Currency Value);
static TValue __fastcall _op_Implicit(__int64 Value);
static TValue __fastcall _op_Implicit(unsigned __int64 Value);
static TValue __fastcall _op_Implicit(System::TObject* Value);
static TValue __fastcall _op_Implicit(System::TClass Value);
static TValue __fastcall _op_Implicit(bool Value);
static TValue __fastcall _op_Implicit(System::TDateTime Value);
static TValue __fastcall _op_Implicit(const System::TVarRec &VarRec);
static TValue __fastcall FromVariant(const System::Variant &Value, System::Typinfo::PTypeInfo ArrayTypeInfo = (System::Typinfo::PTypeInfo)(0x0));
template<typename T> static TValue __fastcall From(const T Value);
static TValue __fastcall FromOrdinal(System::Typinfo::PTypeInfo ATypeInfo, __int64 AValue);
static TValue __fastcall FromArray(System::Typinfo::PTypeInfo ArrayTypeInfo, const TValue *Values, const System::NativeInt Values_High);
static TValue __fastcall FromVarRec(const System::TVarRec &VarRec);
__property System::Typinfo::TTypeKind Kind = {read=GetTypeKind};
__property System::Typinfo::PTypeInfo TypeInfo = {read=GetTypeInfo};
__property System::Typinfo::PTypeData TypeData = {read=GetTypeDataProp};
__property bool IsEmpty = {read=GetIsEmpty};
bool __fastcall IsObject();
bool __fastcall IsObjectInstance();
System::TObject* __fastcall AsObject();
bool __fastcall IsInstanceOf(System::TClass AClass);
bool __fastcall IsClass();
System::TClass __fastcall AsClass();
bool __fastcall IsOrdinal();
__int64 __fastcall AsOrdinal();
bool __fastcall TryAsOrdinal(/* out */ __int64 &AResult);
template<typename T> bool __fastcall IsType(const bool EmptyAsAnyType = true)/* overload */;
bool __fastcall IsType(System::Typinfo::PTypeInfo ATypeInfo, const bool EmptyAsAnyType = true)/* overload */;
template<typename T> T __fastcall AsType(const bool EmptyAsAnyType = true);
template<typename T> bool __fastcall TryAsType(/* out */ T &AResult, const bool EmptyAsAnyType = true);
template<typename T> TValue __fastcall Cast(const bool EmptyAsAnyType = true)/* overload */;
TValue __fastcall Cast(System::Typinfo::PTypeInfo ATypeInfo, const bool EmptyAsAnyType = true)/* overload */;
bool __fastcall TryCast(System::Typinfo::PTypeInfo ATypeInfo, /* out */ TValue &AResult, const bool EmptyAsAnyType = true);
int __fastcall AsInteger();
bool __fastcall AsBoolean();
System::Extended __fastcall AsExtended();
__int64 __fastcall AsInt64();
unsigned __int64 __fastcall AsUInt64();
System::_di_IInterface __fastcall AsInterface();
System::UnicodeString __fastcall AsString();
System::Variant __fastcall AsVariant();
System::Currency __fastcall AsCurrency();
bool __fastcall IsArray();
TValue __fastcall CastToVarRec();
System::TVarRec __fastcall AsVarRec();
System::NativeInt __fastcall GetArrayLength();
TValue __fastcall GetArrayElement(System::NativeInt Index);
void __fastcall SetArrayElement(System::NativeInt Index, const TValue &AValue);
static void __fastcall Make(void * ABuffer, System::Typinfo::PTypeInfo ATypeInfo, TValue &Result)/* overload */;
static void __fastcall Make(System::NativeInt AValue, System::Typinfo::PTypeInfo ATypeInfo, TValue &Result)/* overload */;
template<typename T> static void __fastcall Make(const T Value, TValue &Result)/* overload */;
static void __fastcall MakeWithoutCopy(void * ABuffer, System::Typinfo::PTypeInfo ATypeInfo, TValue &Result, bool IsMoved = false)/* overload */;
__property int DataSize = {read=GetDataSize};
void __fastcall ExtractRawData(void * ABuffer);
void __fastcall ExtractRawDataNoCopy(void * ABuffer);
void * __fastcall GetReferenceToRawData();
void * __fastcall GetReferenceToRawArrayElement(System::NativeInt Index);
/* static */ __property TValue Empty = {read=GetEmpty};
System::UnicodeString __fastcall ToString(const System::Sysutils::TFormatSettings &AFormatSettings)/* overload */;
System::UnicodeString __fastcall ToString()/* overload */;
private:
System::Typinfo::PTypeInfo FTypeInfo;
_di_IValueData FValueData;
public:
TValue& operator =(const System::UnicodeString Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(int Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(unsigned Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(float Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(double Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(System::Extended Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(System::Currency Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(__int64 Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(unsigned __int64 Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(System::TObject* Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(System::TClass Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(bool Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(System::TDateTime Value) { *this = TValue::_op_Implicit(Value); return *this; }
TValue& operator =(const System::TVarRec &VarRec) { *this = TValue::_op_Implicit(VarRec); return *this; }
private:
union
{
struct
{
void *FAsPointer;
};
struct
{
System::TMethod FAsMethod;
};
struct
{
__int64 FAsSInt64;
};
struct
{
unsigned __int64 FAsUInt64;
};
struct
{
System::CurrencyBase FAsCurr;
};
struct
{
System::CompBase FAsComp;
};
struct
{
System::Extended FAsExtended;
};
struct
{
double FAsDouble;
};
struct
{
float FAsSingle;
};
struct
{
int FAsSLong;
};
struct
{
short FAsSWord;
};
struct
{
System::Int8 FAsSByte;
};
struct
{
System::TClass FAsClass;
};
struct
{
void *FAsObject;
};
struct
{
unsigned FAsULong;
};
struct
{
System::Word FAsUWord;
};
struct
{
System::Byte FAsUByte;
};
};
};
Eigenschaften
| Typ | Sichtbarkeit | Quelle | Unit | Übergeordnet |
|---|---|---|---|---|
record struct |
public | System.Rtti.pas System.Rtti.hpp |
System.Rtti | System.Rtti |
Beschreibung
Repräsentiert eine schlanke Version des Variant-Typs.
TValue ist eine Datenstruktur, die unterschiedliche Datentypen speichern kann. TValue wird in der Unit Rtti verwendet, um den Zugriff auf Felder und Methodenparameter zu erleichtern.