/// <summary>
/// プロパティ名から値を高速取得する
/// </summary>
/// <param name="obj">取得対象のオブジェクト</param>
/// <param name="propertyName">プロパティ名</param>
/// <returns>プロパティの値</returns>
public static object GetPropertyValue(this object obj, string propertyName)
{
var type = obj.GetType();
GetSiteCollection getSiteCollection = null;
CallSite<Func<CallSite, object, object>> siteGet = null;
//型キャッシュの存在確認
if (_getSiteCollectionCache.TryGetValue(type, out getSiteCollection)) {
siteGet = getSiteCollection[propertyName];
//Getterキャッシュの存在確認
if (siteGet != null) {
return siteGet.Target(siteGet, obj);
}
}
var argInfo = new CSharpArgumentInfo[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) };
siteGet = CallSite<Func<CallSite, object, object>>.Create(Microsoft.CSharp.RuntimeBinder.Binder.GetMember(CSharpBinderFlags.None, propertyName, type, argInfo));
if (getSiteCollection == null) {
getSiteCollection = new GetSiteCollection(propertyName, siteGet);
_getSiteCollectionCache.Add(type, getSiteCollection);
} else {
getSiteCollection.Add(propertyName, siteGet);
}
return siteGet.Target(siteGet, obj);
}
/// <summary>
/// Reduces the dynamic expression to a binder and a set of arguments to apply the operation to.
/// </summary>
/// <param name="binder">The binder used to perform the dynamic operation.</param>
/// <param name="arguments">The arguments to apply the dynamic operation to.</param>
/// <param name="argumentTypes">The types of the arguments to use for the dynamic call site. Return null to infer types.</param>
protected override void ReduceDynamic(out CallSiteBinder binder, out IEnumerable<Expression> arguments, out Type[] argumentTypes)
{
var n = Arguments.Count;
var argumentInfos = new CSharpArgumentInfo[n + 1];
var expressions = new Expression[n + 1];
expressions[0] = Expression.Constant(Type, typeof(Type));
argumentInfos[0] = CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.UseCompileTimeType | CSharpArgumentInfoFlags.IsStaticType, null);
argumentTypes = null;
CopyArguments(Arguments, argumentInfos, expressions, ref argumentTypes);
binder = Binder.InvokeConstructor(Flags, Context, argumentInfos);
arguments = expressions;
}
/// <summary>
/// Reduces the dynamic expression to a binder and a set of arguments to apply the operation to.
/// </summary>
/// <param name="binder">The binder used to perform the dynamic operation.</param>
/// <param name="arguments">The arguments to apply the dynamic operation to.</param>
/// <param name="argumentTypes">The types of the arguments to use for the dynamic call site. Return null to infer types.</param>
protected override void ReduceDynamic(out CallSiteBinder binder, out IEnumerable<Expression> arguments, out Type[] argumentTypes)
{
var n = Arguments.Count;
var argumentInfos = new CSharpArgumentInfo[n + 1];
var expressions = new Expression[n + 1];
expressions[0] = Expression;
argumentInfos[0] = CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null);
argumentTypes = null;
CopyArguments(Arguments, argumentInfos, expressions, ref argumentTypes);
binder = Binder.Invoke(Flags, Context, argumentInfos);
arguments = expressions;
}
/// <summary>
/// Reduces the dynamic expression to a binder and a set of arguments to apply the operation to.
/// </summary>
/// <param name="binder">The binder used to perform the dynamic operation.</param>
/// <param name="arguments">The arguments to apply the dynamic operation to.</param>
/// <param name="argumentTypes">The types of the arguments to use for the dynamic call site. Return null to infer types.</param>
protected override void ReduceDynamic(out CallSiteBinder binder, out IEnumerable<Expression> arguments, out Type[] argumentTypes)
{
var n = Arguments.Count;
var argumentInfos = new CSharpArgumentInfo[n + 1];
var expressions = new Expression[n + 1];
// NB: By-ref passing for the receiver seems to be omitted in Roslyn here; see https://github.com/dotnet/roslyn/issues/6818.
// We're choosing to be consistent with that behavior until further notice.
expressions[0] = Object;
argumentInfos[0] = CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null);
argumentTypes = null;
CopyArguments(Arguments, argumentInfos, expressions, ref argumentTypes);
binder = Binder.GetIndex(Flags, Context, argumentInfos);
arguments = expressions;
}
//
// Creates mcs expression from dynamic object
//
public Compiler.Expression CreateCompilerExpression (CSharpArgumentInfo info, DynamicMetaObject value)
{
//
// No type details provider, go with runtime type
//
if (info == null) {
if (value.LimitType == typeof (object))
return new Compiler.NullLiteral (Compiler.Location.Null);
return new Compiler.RuntimeValueExpression (value, ImportType (value.RuntimeType));
}
//
// Value is known to be a type
//
if ((info.Flags & CSharpArgumentInfoFlags.IsStaticType) != 0)
return new Compiler.TypeExpression (ImportType ((Type) value.Value), Compiler.Location.Null);
if (value.Value == null &&
(info.Flags & (CSharpArgumentInfoFlags.IsOut | CSharpArgumentInfoFlags.IsRef | CSharpArgumentInfoFlags.UseCompileTimeType)) == 0 &&
value.LimitType == typeof (object)) {
return new Compiler.NullLiteral (Compiler.Location.Null);
}
//
// Use compilation time type when type was known not to be dynamic during compilation
//
Type value_type = (info.Flags & CSharpArgumentInfoFlags.UseCompileTimeType) != 0 ? value.Expression.Type : value.LimitType;
var type = ImportType (value_type);
if ((info.Flags & CSharpArgumentInfoFlags.Constant) != 0)
return Compiler.Constant.CreateConstantFromValue (type, value.Value, Compiler.Location.Null);
return new Compiler.RuntimeValueExpression (value, type);
}
//
// Creates mcs expression from dynamic method object
//
public static Compiler.Expression CreateCompilerExpression (CSharpArgumentInfo info, DynamicMetaObject value)
{
if (value.Value == null) {
if (value.LimitType == typeof (object))
return new Compiler.NullLiteral (Compiler.Location.Null);
InitializeCompiler (null);
return Compiler.Constant.CreateConstantFromValue (TypeImporter.Import (value.LimitType), null, Compiler.Location.Null);
}
bool is_compile_time;
if (info != null) {
if ((info.Flags & CSharpArgumentInfoFlags.Constant) != 0) {
InitializeCompiler (null);
return Compiler.Constant.CreateConstantFromValue (TypeImporter.Import (value.LimitType), value.Value, Compiler.Location.Null);
}
if ((info.Flags & CSharpArgumentInfoFlags.IsStaticType) != 0)
return new Compiler.TypeExpression (TypeImporter.Import ((Type) value.Value), Compiler.Location.Null);
is_compile_time = (info.Flags & CSharpArgumentInfoFlags.UseCompileTimeType) != 0;
} else {
is_compile_time = false;
}
return new Compiler.RuntimeValueExpression (value, TypeImporter.Import (is_compile_time ? value.LimitType : value.RuntimeType));
}
public static void CopyArguments(ReadOnlyCollection<DynamicCSharpArgument> arguments, CSharpArgumentInfo[] argumentInfos, Expression[] expressions, ref Type[] argumentTypes)
{
var n = arguments.Count;
for (var i = 0; i < n; i++)
{
var argument = arguments[i];
argumentInfos[i + 1] = argument.ArgumentInfo;
expressions[i + 1] = argument.Expression;
if ((argument.Flags & (CSharpArgumentInfoFlags.IsRef | CSharpArgumentInfoFlags.IsOut)) != 0)
{
if (argumentTypes == null)
{
argumentTypes = new Type[argumentInfos.Length];
argumentTypes[0] = expressions[0].Type;
for (var j = 0; j < i; j++)
{
argumentTypes[j + 1] = arguments[j].Expression.Type;
}
}
argumentTypes[i + 1] = argument.Expression.Type.MakeByRefType();
}
else if (argumentTypes != null)
{
argumentTypes[i + 1] = argument.Expression.Type;
}
}
}
public static void CopyReceiverArgument(Expression receiver, CSharpArgumentInfo[] argumentInfos, Expression[] expressions, ref Type[] argumentTypes)
{
var receiverFlags = CSharpArgumentInfoFlags.None;
if (IsReceiverByRef(receiver))
{
receiverFlags |= CSharpArgumentInfoFlags.IsRef;
argumentTypes = new Type[argumentInfos.Length];
argumentTypes[0] = receiver.Type.MakeByRefType();
}
expressions[0] = receiver;
argumentInfos[0] = CSharpArgumentInfo.Create(receiverFlags, null);
}
protected override void ReduceDynamic(out CallSiteBinder binder, out IEnumerable<Expression> arguments, out Type[] argumentTypes)
{
var n = Arguments.Count;
var argumentInfos = new CSharpArgumentInfo[n + 1];
var expressions = new Expression[n + 1];
argumentTypes = null;
CopyReceiverArgument(Object, argumentInfos, expressions, ref argumentTypes);
CopyArguments(Arguments, argumentInfos, expressions, ref argumentTypes);
binder = Binder.InvokeMember(Flags, Name, TypeArguments, Context, argumentInfos);
arguments = expressions;
}
private void ReduceAssignment(Expression value, CSharpBinderFlags flags, CSharpArgumentInfoFlags leftFlags, CSharpArgumentInfoFlags rightFlags, out CallSiteBinder binder, out IEnumerable<Expression> arguments, out Type[] argumentTypes)
{
var n = Arguments.Count;
var argumentInfos = new CSharpArgumentInfo[n + 2];
var expressions = new Expression[n + 2];
// NB: By-ref passing for the receiver seems to be omitted in Roslyn here; see https://github.com/dotnet/roslyn/issues/6818.
// We're choosing to be consistent with that behavior until further notice.
expressions[0] = Object;
argumentInfos[0] = CSharpArgumentInfo.Create(leftFlags, null);
argumentTypes = null;
CopyArguments(Arguments, argumentInfos, expressions, ref argumentTypes);
argumentInfos[n + 1] = CSharpArgumentInfo.Create(rightFlags, null); // TODO: check
expressions[n + 1] = value;
flags |= Flags;
binder = Binder.SetMember(flags, Name, Context, argumentInfos);
arguments = expressions;
}
/////////////////////////////////////////////////////////////////////////////////
private static bool IsDynamicallyTypedRuntimeProxy(DynamicMetaObject argument, CSharpArgumentInfo info)
{
// This detects situations where, although the argument has a value with
// a given type, that type is insufficient to determine, statically, the
// set of reference conversions that are going to exist at bind time for
// different values. For instance, one __ComObject may allow a conversion
// to IFoo while another does not.
bool isDynamicObject =
info != null &&
!info.UseCompileTimeType &&
(IsComObject(argument.Value) || IsTransparentProxy(argument.Value));
return(isDynamicObject);
}
internal static DynamicMetaObject Bind(
DynamicMetaObjectBinder action,
RuntimeBinder binder,
DynamicMetaObject[] args,
IEnumerable <CSharpArgumentInfo> arginfos,
DynamicMetaObject onBindingError)
{
Expression[] parameters = new Expression[args.Length];
BindingRestrictions restrictions = BindingRestrictions.Empty;
ICSharpInvokeOrInvokeMemberBinder callPayload = action as ICSharpInvokeOrInvokeMemberBinder;
ParameterExpression tempForIncrement = null;
IEnumerator <CSharpArgumentInfo> arginfosEnum = (arginfos ?? Array.Empty <CSharpArgumentInfo>()).GetEnumerator();
for (int index = 0; index < args.Length; ++index)
{
DynamicMetaObject o = args[index];
// Our contract with the DLR is such that we will not enter a bind unless we have
// values for the meta-objects involved.
if (!o.HasValue)
{
Debug.Assert(false, "The runtime binder is being asked to bind a metaobject without a value");
throw Error.InternalCompilerError();
}
CSharpArgumentInfo info = arginfosEnum.MoveNext() ? arginfosEnum.Current : null;
if (index == 0 && IsIncrementOrDecrementActionOnLocal(action))
{
// We have an inc or a dec operation. Insert the temp local instead.
//
// We need to do this because for value types, the object will come
// in boxed, and we'd need to unbox it to get the original type in order
// to increment. The only way to do that is to create a new temporary.
object value = o.Value;
tempForIncrement = Expression.Variable(value != null ? value.GetType() : typeof(object), "t0");
parameters[0] = tempForIncrement;
}
else
{
parameters[index] = o.Expression;
}
BindingRestrictions r = DeduceArgumentRestriction(index, callPayload, o, info);
restrictions = restrictions.Merge(r);
// Here we check the argument info. If the argument info shows that the current argument
// is a literal constant, then we also add an instance restriction on the value of
// the constant.
if (info != null && info.LiteralConstant)
{
if (o.Value is double && double.IsNaN((double)o.Value))
{
MethodInfo isNaN = s_DoubleIsNaN ?? (s_DoubleIsNaN = typeof(double).GetMethod("IsNaN"));
Expression e = Expression.Call(null, isNaN, o.Expression);
restrictions = restrictions.Merge(BindingRestrictions.GetExpressionRestriction(e));
}
else if (o.Value is float && float.IsNaN((float)o.Value))
{
MethodInfo isNaN = s_SingleIsNaN ?? (s_SingleIsNaN = typeof(float).GetMethod("IsNaN"));
Expression e = Expression.Call(null, isNaN, o.Expression);
restrictions = restrictions.Merge(BindingRestrictions.GetExpressionRestriction(e));
}
else
{
Expression e = Expression.Equal(o.Expression, Expression.Constant(o.Value, o.Expression.Type));
r = BindingRestrictions.GetExpressionRestriction(e);
restrictions = restrictions.Merge(r);
}
}
}
// Get the bound expression.
try
{
DynamicMetaObject deferredBinding;
Expression expression = binder.Bind(action, parameters, args, out deferredBinding);
if (deferredBinding != null)
{
expression = ConvertResult(deferredBinding.Expression, action);
restrictions = deferredBinding.Restrictions.Merge(restrictions);
return(new DynamicMetaObject(expression, restrictions));
}
if (tempForIncrement != null)
{
// If we have a ++ or -- payload, we need to do some temp rewriting.
// We rewrite to the following:
//
// temp = (type)o;
// temp++;
// o = temp;
// return o;
DynamicMetaObject arg0 = args[0];
expression = Expression.Block(
new[] { tempForIncrement },
Expression.Assign(tempForIncrement, Expression.Convert(arg0.Expression, arg0.Value.GetType())),
expression,
Expression.Assign(arg0.Expression, Expression.Convert(tempForIncrement, arg0.Expression.Type)));
}
expression = ConvertResult(expression, action);
return(new DynamicMetaObject(expression, restrictions));
}
catch (RuntimeBinderException e)
{
if (onBindingError != null)
{
return(onBindingError);
}
return(new DynamicMetaObject(
Expression.Throw(
Expression.New(
typeof(RuntimeBinderException).GetConstructor(new Type[] { typeof(string) }),
Expression.Constant(e.Message)
),
GetTypeForErrorMetaObject(action, args.Length == 0 ? null : args[0])
),
restrictions
));
}
}
internal static DynamicMetaObject Bind(
DynamicMetaObjectBinder action,
RuntimeBinder binder,
IEnumerable <DynamicMetaObject> args,
IEnumerable <CSharpArgumentInfo> arginfos,
DynamicMetaObject onBindingError)
{
List <Expression> parameters = new List <Expression>();
BindingRestrictions restrictions = BindingRestrictions.Empty;
ICSharpInvokeOrInvokeMemberBinder callPayload = action as ICSharpInvokeOrInvokeMemberBinder;
ParameterExpression tempForIncrement = null;
IEnumerator <CSharpArgumentInfo> arginfosEnum = arginfos == null ? null : arginfos.GetEnumerator();
int index = 0;
foreach (DynamicMetaObject o in args)
{
// Our contract with the DLR is such that we will not enter a bind unless we have
// values for the meta-objects involved.
if (!o.HasValue)
{
Debug.Assert(false, "The runtime binder is being asked to bind a metaobject without a value");
throw Error.InternalCompilerError();
}
CSharpArgumentInfo info = null;
if (arginfosEnum != null && arginfosEnum.MoveNext())
{
info = arginfosEnum.Current;
}
if (index == 0 && IsIncrementOrDecrementActionOnLocal(action))
{
// We have an inc or a dec operation. Insert the temp local instead.
//
// We need to do this because for value types, the object will come
// in boxed, and we'd need to unbox it to get the original type in order
// to increment. The only way to do that is to create a new temporary.
tempForIncrement = Expression.Variable(o.Value != null ? o.Value.GetType() : typeof(object), "t0");
parameters.Add(tempForIncrement);
}
else
{
parameters.Add(o.Expression);
}
BindingRestrictions r = DeduceArgumentRestriction(index, callPayload, o, info);
restrictions = restrictions.Merge(r);
// Here we check the argument info. If the argument info shows that the current argument
// is a literal constant, then we also add an instance restriction on the value of
// the constant.
if (info != null && info.LiteralConstant)
{
if ((o.Value is float && float.IsNaN((float)o.Value)) ||
o.Value is double && double.IsNaN((double)o.Value))
{
// We cannot create an equality restriction for NaN, because equality is implemented
// in such a way that NaN != NaN and the rule we make would be unsatisfiable.
}
else
{
Expression e = Expression.Equal(o.Expression, Expression.Constant(o.Value, o.Expression.Type));
r = BindingRestrictions.GetExpressionRestriction(e);
restrictions = restrictions.Merge(r);
}
}
++index;
}
// Get the bound expression.
try
{
DynamicMetaObject deferredBinding;
Expression expression = binder.Bind(action, parameters, args.ToArray(), out deferredBinding);
if (deferredBinding != null)
{
expression = ConvertResult(deferredBinding.Expression, action);
restrictions = deferredBinding.Restrictions.Merge(restrictions);
return(new DynamicMetaObject(expression, restrictions));
}
if (tempForIncrement != null)
{
// If we have a ++ or -- payload, we need to do some temp rewriting.
// We rewrite to the following:
//
// temp = (type)o;
// temp++;
// o = temp;
// return o;
DynamicMetaObject arg0 = Enumerable.First(args);
Expression assignTemp = Expression.Assign(
tempForIncrement,
Expression.Convert(arg0.Expression, arg0.Value.GetType()));
Expression assignResult = Expression.Assign(
arg0.Expression,
Expression.Convert(tempForIncrement, arg0.Expression.Type));
List <Expression> expressions = new List <Expression>();
expressions.Add(assignTemp);
expressions.Add(expression);
expressions.Add(assignResult);
expression = Expression.Block(new ParameterExpression[] { tempForIncrement }, expressions);
}
expression = ConvertResult(expression, action);
return(new DynamicMetaObject(expression, restrictions));
}
catch (RuntimeBinderException e)
{
if (onBindingError != null)
{
return(onBindingError);
}
return(new DynamicMetaObject(
Expression.Throw(
Expression.New(
typeof(RuntimeBinderException).GetConstructor(new Type[] { typeof(string) }),
Expression.Constant(e.Message)
),
GetTypeForErrorMetaObject(action, args.FirstOrDefault())
),
restrictions
));
}
}
private void ReduceAssignment(Expression value, CSharpBinderFlags flags, CSharpArgumentInfoFlags leftFlags, CSharpArgumentInfoFlags rightFlags, out CallSiteBinder binder, out IEnumerable<Expression> arguments, out Type[] argumentTypes)
{
var n = Arguments.Count;
var argumentInfos = new CSharpArgumentInfo[n + 2];
var expressions = new Expression[n + 2];
// NB: This is the only place where by-ref passing for the receiver is done in Roslyn; for more
// info about the apparent inconsistency see https://github.com/dotnet/roslyn/issues/6818.
// We're choosing to be consistent with that behavior until further notice.
if (IsReceiverByRef(Object))
{
leftFlags |= CSharpArgumentInfoFlags.IsRef;
}
expressions[0] = Object;
argumentInfos[0] = CSharpArgumentInfo.Create(leftFlags, null);
argumentTypes = null;
CopyArguments(Arguments, argumentInfos, expressions, ref argumentTypes);
argumentInfos[n + 1] = CSharpArgumentInfo.Create(rightFlags, null); // TODO: check
expressions[n + 1] = value;
flags |= Flags;
binder = Binder.SetIndex(flags, Context, argumentInfos);
arguments = expressions;
}
private static IEnumerable<CSharpArgumentInfo> GetBinderArguments(int count)
{
var arr = new CSharpArgumentInfo[count];
for (int i = 0; i < count; i++)
{
arr[i] = CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.UseCompileTimeType, null);
}
return arr;
}
//
// Creates mcs expression from dynamic method object
//
public static Compiler.Expression CreateCompilerExpression (CSharpArgumentInfo info, DynamicMetaObject value, bool typed)
{
if (info.IsNamed)
throw new NotImplementedException ("IsNamed");
if (value.Value == null)
return new Compiler.NullLiteral (value.LimitType, Compiler.Location.Null);
if ((info.Flags & CSharpArgumentInfoFlags.LiteralConstant) != 0) {
if (!typed)
throw new NotImplementedException ("weakly typed constant");
return Compiler.Constant.CreateConstant (value.RuntimeType ?? value.LimitType, value.Value, Compiler.Location.Null);
}
return new Compiler.RuntimeValueExpression (value, typed);
}
private bool DeferBinding(
DynamicMetaObjectBinder payload,
ArgumentObject[] arguments,
DynamicMetaObject[] args,
Dictionary<int, LocalVariableSymbol> dictionary,
out DynamicMetaObject deferredBinding)
{
// This method deals with any deferrals we need to do. We check deferrals up front
// and bail early if we need to do them.
// (1) InvokeMember deferral.
//
// This is the deferral for the d.Foo() scenario where Foo actually binds to a
// field or property, and not a method group that is invocable. We defer to
// the standard GetMember/Invoke pattern.
if (payload is CSharpInvokeMemberBinder)
{
ICSharpInvokeOrInvokeMemberBinder callPayload = payload as ICSharpInvokeOrInvokeMemberBinder;
int arity = callPayload.TypeArguments != null ? callPayload.TypeArguments.Count : 0;
MemberLookup mem = new MemberLookup();
EXPR callingObject = CreateCallingObjectForCall(callPayload, arguments, dictionary);
Debug.Assert(_bindingContext.ContextForMemberLookup() != null);
SymWithType swt = _symbolTable.LookupMember(
callPayload.Name,
callingObject,
_bindingContext.ContextForMemberLookup(),
arity,
mem,
(callPayload.Flags & CSharpCallFlags.EventHookup) != 0,
true);
if (swt != null && swt.Sym.getKind() != SYMKIND.SK_MethodSymbol)
{
// The GetMember only has one argument, and we need to just take the first arg info.
CSharpGetMemberBinder getMember = new CSharpGetMemberBinder(callPayload.Name, false, callPayload.CallingContext, new CSharpArgumentInfo[] { callPayload.ArgumentInfo[0] });
// The Invoke has the remaining argument infos. However, we need to redo the first one
// to correspond to the GetMember result.
CSharpArgumentInfo[] argInfos = new CSharpArgumentInfo[callPayload.ArgumentInfo.Count];
callPayload.ArgumentInfo.CopyTo(argInfos, 0);
argInfos[0] = CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null);
CSharpInvokeBinder invoke = new CSharpInvokeBinder(callPayload.Flags, callPayload.CallingContext, argInfos);
DynamicMetaObject[] newArgs = new DynamicMetaObject[args.Length - 1];
Array.Copy(args, 1, newArgs, 0, args.Length - 1);
deferredBinding = invoke.Defer(getMember.Defer(args[0]), newArgs);
return true;
}
}
deferredBinding = null;
return false;
}
public static object TryEvalUnaryOperators <T>(T obj, ExpressionType oper, Type accessibilityContext)
{
if (oper == ExpressionType.IsTrue || oper == ExpressionType.IsFalse)
{
var trueFalseSite = CallSite <Func <CallSite, T, bool> >
.Create(new Microsoft.CSharp.RuntimeBinder.CSharpUnaryOperationBinder(oper,
false,
accessibilityContext,
new CSharpArgumentInfo[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) }));
return(trueFalseSite.Target(trueFalseSite, obj));
}
var site = CallSite <Func <CallSite, T, object> >
.Create(new Microsoft.CSharp.RuntimeBinder.CSharpUnaryOperationBinder(oper,
false,
accessibilityContext,
new CSharpArgumentInfo[] { CSharpArgumentInfo.Create(CSharpArgumentInfoFlags.None, null) }));
return(site.Target(site, obj));
}