C# CodeGenerator.DeclareLocal方法代码示例

 internal System.Runtime.Serialization.CreateXmlSerializableDelegate GenerateCreateXmlSerializableDelegate()
 {
     Type underlyingType = base.UnderlyingType;
     CodeGenerator generator = new CodeGenerator();
     bool allowPrivateMemberAccess = this.RequiresMemberAccessForCreate(null);
     try
     {
         generator.BeginMethod("Create" + DataContract.GetClrTypeFullName(underlyingType), typeof(System.Runtime.Serialization.CreateXmlSerializableDelegate), allowPrivateMemberAccess);
     }
     catch (SecurityException exception)
     {
         if (!allowPrivateMemberAccess || !exception.PermissionType.Equals(typeof(ReflectionPermission)))
         {
             throw;
         }
         this.RequiresMemberAccessForCreate(exception);
     }
     if (underlyingType.IsValueType)
     {
         LocalBuilder localBuilder = generator.DeclareLocal(underlyingType, underlyingType.Name + "Value");
         generator.Ldloca(localBuilder);
         generator.InitObj(underlyingType);
         generator.Ldloc(localBuilder);
     }
     else
     {
         generator.New(this.GetConstructor());
     }
     generator.ConvertValue(base.UnderlyingType, Globals.TypeOfIXmlSerializable);
     generator.Ret();
     return (System.Runtime.Serialization.CreateXmlSerializableDelegate) generator.EndMethod();
 }

 public BitFlagsGenerator(int bitCount, CodeGenerator ilg, string localName)
 {
     _ilg = ilg;
     _bitCount = bitCount;
     int localCount = (bitCount + 7) / 8;
     _locals = new LocalBuilder[localCount];
     for (int i = 0; i < _locals.Length; i++)
     {
         _locals[i] = ilg.DeclareLocal(typeof(byte), localName + i, (byte)0);
     }
 }

 public BitFlagsGenerator(int bitCount, CodeGenerator ilg, string localName)
 {
     this.ilg = ilg;
     this.bitCount = bitCount;
     int num = (bitCount + 7) / 8;
     this.locals = new LocalBuilder[num];
     for (int i = 0; i < this.locals.Length; i++)
     {
         this.locals[i] = ilg.DeclareLocal(typeof(byte), localName + i, (byte) 0);
     }
 }

            internal CreateInstanceDelegate GenerateCreateInstanceDelegate(Type type, ConstructorInfo constructor)
            {
                bool requiresMemberAccess = !IsTypeVisible(type) || ConstructorRequiresMemberAccess(constructor);

                this.ilg = new CodeGenerator();
                try
                {
                    ilg.BeginMethod("Create" + type.FullName, typeof(CreateInstanceDelegate), requiresMemberAccess);
                }
                catch (SecurityException securityException)
                {
                    if (requiresMemberAccess && securityException.PermissionType.Equals(typeof(ReflectionPermission)))
                    {
                        DiagnosticUtility.TraceHandledException(securityException, TraceEventType.Warning);
                        throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
                            new SecurityException(SR.GetString(
                                    SR.PartialTrustServiceCtorNotVisible,
                                    type.FullName)));
                    }
                    else
                    {
                        throw;
                    }
                }

                if (type.IsValueType)
                {
                    LocalBuilder instanceLocal = ilg.DeclareLocal(type, type.Name + "Instance");
                    ilg.LoadZeroValueIntoLocal(type, instanceLocal);
                    ilg.Load(instanceLocal);
                }
                else
                {
                    ilg.New(constructor);
                }
                ilg.ConvertValue(type, ilg.CurrentMethod.ReturnType);
                return (CreateInstanceDelegate)ilg.EndMethod();
            }

            internal InvokeEndDelegate GenerateInvokeEndDelegate(MethodInfo method, out int outputParameterCount)
            {
                bool requiresMemberAccess = MethodRequiresMemberAccess(method);

                this.ilg = new CodeGenerator();
                try
                {
                    this.ilg.BeginMethod("AsyncInvokeEnd" + method.Name, typeof(InvokeEndDelegate), requiresMemberAccess);
                }
                catch (SecurityException securityException)
                {
                    if (requiresMemberAccess && securityException.PermissionType.Equals(typeof(ReflectionPermission)))
                    {
                        DiagnosticUtility.TraceHandledException(securityException, TraceEventType.Warning);
                        throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
                            new SecurityException(SR.GetString(
                                    SR.PartialTrustServiceMethodNotVisible,
                                    method.DeclaringType.FullName,
                                    method.Name)));
                    }
                    else
                    {
                        throw;
                    }
                }

                ArgBuilder targetArg = ilg.GetArg(0);
                ArgBuilder outputParametersArg = ilg.GetArg(1);
                ArgBuilder resultArg = ilg.GetArg(2);

                ParameterInfo[] parameters = method.GetParameters();
                LocalBuilder returnLocal = ilg.DeclareLocal(ilg.CurrentMethod.ReturnType, "returnParam");
                LocalBuilder[] parameterLocals = new LocalBuilder[parameters.Length - 1];
                DeclareParameterLocals(parameters, parameterLocals);

                LoadZeroValueInputParametersIntoLocals(parameters, parameterLocals);
                LoadTarget(targetArg, method.ReflectedType);
                LoadParameters(parameters, parameterLocals);
                ilg.Load(resultArg);
                InvokeMethod(method, returnLocal);
                LoadOutputParametersIntoArray(parameters, parameterLocals, outputParametersArg, out outputParameterCount);

                ilg.Load(returnLocal);
                return (InvokeEndDelegate)this.ilg.EndMethod();
            }

 internal CreateXmlSerializableDelegate GenerateCreateXmlSerializableDelegate()
 {
     Type type = this.UnderlyingType;
     CodeGenerator ilg = new CodeGenerator();
     bool memberAccessFlag = RequiresMemberAccessForCreate(null);
     try
     {
         ilg.BeginMethod("Create" + DataContract.GetClrTypeFullName(type), typeof(CreateXmlSerializableDelegate), memberAccessFlag);
     }
     catch (SecurityException securityException)
     {
         if (memberAccessFlag && securityException.PermissionType.Equals(typeof(ReflectionPermission)))
         {
             RequiresMemberAccessForCreate(securityException);
         }
         else
         {
             throw;
         }
     }
     if (type.IsValueType)
     {
         System.Reflection.Emit.LocalBuilder local = ilg.DeclareLocal(type, type.Name + "Value");
         ilg.Ldloca(local);
         ilg.InitObj(type);
         ilg.Ldloc(local);
     }
     else
     {
         ilg.New(GetConstructor());
     }
     ilg.ConvertValue(this.UnderlyingType, Globals.TypeOfIXmlSerializable);
     ilg.Ret();
     return (CreateXmlSerializableDelegate)ilg.EndMethod();
 }

        string WriteHashtable(EnumMapping mapping, string typeName, out MethodBuilder get_TableName) {
            get_TableName = null;

            CodeIdentifier.CheckValidIdentifier(typeName);
            string propName = MakeUnique(mapping, typeName + "Values");
            if (propName == null) return CodeIdentifier.GetCSharpName(typeName);
            string memberName = MakeUnique(mapping, "_" + propName);
            propName = CodeIdentifier.GetCSharpName(propName);

            FieldBuilder fieldBuilder = this.typeBuilder.DefineField(
                memberName,
                typeof(Hashtable),
                FieldAttributes.Private
                );

            PropertyBuilder propertyBuilder = this.typeBuilder.DefineProperty(
                propName,
                PropertyAttributes.None,
                CallingConventions.HasThis,
                typeof(Hashtable),
                null, null, null, null, null);

            ilg = new CodeGenerator(this.typeBuilder);
            ilg.BeginMethod(
                typeof(Hashtable),
                "get_" + propName,
                CodeGenerator.EmptyTypeArray,
                CodeGenerator.EmptyStringArray,
                MethodAttributes.Assembly | MethodAttributes.HideBySig | MethodAttributes.SpecialName);

            ilg.Ldarg(0);
            ilg.LoadMember(fieldBuilder);
            ilg.Load(null);
            ilg.If(Cmp.EqualTo);

            ConstructorInfo Hashtable_ctor = typeof(Hashtable).GetConstructor(
                CodeGenerator.InstanceBindingFlags,
                null,
                CodeGenerator.EmptyTypeArray,
                null
                );
            LocalBuilder hLoc = ilg.DeclareLocal(typeof(Hashtable), "h");
            ilg.New(Hashtable_ctor);
            ilg.Stloc(hLoc);

            ConstantMapping[] constants = mapping.Constants;
            MethodInfo Hashtable_Add = typeof(Hashtable).GetMethod(
                "Add",
                CodeGenerator.InstanceBindingFlags,
                null,
                new Type[] { typeof(Object), typeof(Object) },
                null
                );

            for (int i = 0; i < constants.Length; i++) {
                ilg.Ldloc(hLoc);
                ilg.Ldstr(constants[i].XmlName);
                ilg.Ldc(Enum.ToObject(mapping.TypeDesc.Type, constants[i].Value));
                ilg.ConvertValue(mapping.TypeDesc.Type, typeof(long));
                ilg.ConvertValue(typeof(long), typeof(Object));

                ilg.Call(Hashtable_Add);
            }

            ilg.Ldarg(0);
            ilg.Ldloc(hLoc);
            ilg.StoreMember(fieldBuilder);

            ilg.EndIf();

            ilg.Ldarg(0);
            ilg.LoadMember(fieldBuilder);

            get_TableName = ilg.EndMethod();
            propertyBuilder.SetGetMethod(get_TableName);

            return propName;
        }

 string GenerateTypeElement(XmlTypeMapping xmlTypeMapping) {
     ElementAccessor element = xmlTypeMapping.Accessor;
     TypeMapping mapping = element.Mapping;
     string methodName = NextMethodName(element.Name);
     ilg = new CodeGenerator(this.typeBuilder);
     ilg.BeginMethod(
         typeof(object),
         methodName,
         CodeGenerator.EmptyTypeArray,
         CodeGenerator.EmptyStringArray,
         CodeGenerator.PublicMethodAttributes
         );
     LocalBuilder oLoc = ilg.DeclareLocal(typeof(object), "o");
     ilg.Load(null);
     ilg.Stloc(oLoc);
     MemberMapping member = new MemberMapping();
     member.TypeDesc = mapping.TypeDesc;
     //member.ReadOnly = !mapping.TypeDesc.HasDefaultConstructor;
     member.Elements = new ElementAccessor[] { element };
     Member[] members = new Member[] { new Member(this, "o", "o", "a", 0, member) };
     MethodInfo XmlSerializationReader_get_Reader = typeof(XmlSerializationReader).GetMethod(
         "get_Reader",
         CodeGenerator.InstanceBindingFlags,
         null,
         CodeGenerator.EmptyTypeArray,
         null
         );
     MethodInfo XmlReader_MoveToContent = typeof(XmlReader).GetMethod(
        "MoveToContent",
        CodeGenerator.InstanceBindingFlags,
        null,
        CodeGenerator.EmptyTypeArray,
        null
        );
     ilg.Ldarg(0);
     ilg.Call(XmlSerializationReader_get_Reader);
     ilg.Call(XmlReader_MoveToContent);
     ilg.Pop();
     string unknownNode = "UnknownNode(null, " + ExpectedElements(members) + ");";
     WriteMemberElements(members, "throw CreateUnknownNodeException();", unknownNode, element.Any ? members[0] : null, null);
     ilg.Ldloc(oLoc);
     // for code compat as compiler does
     ilg.Stloc(ilg.ReturnLocal);
     ilg.Ldloc(ilg.ReturnLocal);
     ilg.EndMethod();
     return methodName;
 }

 private static IEmitterType EmitValueType(Type type, CodeGenerator codeGenerator)
 {
     LocalBuilder builder = codeGenerator.DeclareLocal(type);
     EmitLocalVariable.Declare(builder).Emit(codeGenerator);
     return EmitBox.Box(EmitLocal.Load(builder));
 }

 internal BitFlagsGenerator(int bitCount, CodeGenerator ilg, string localName)
 {
     this.ilg = ilg;
     this.bitCount = bitCount;
     int localCount = (bitCount+7)/8;
     locals = new LocalBuilder[localCount];
     for (int i=0;i<locals.Length;i++)
         locals[i] = ilg.DeclareLocal(Globals.TypeOfByte, localName+i, (byte)0);
 }

        void WriteNullableMethod(NullableMapping nullableMapping) {
            string methodName = (string)MethodNames[nullableMapping];
            ilg = new CodeGenerator(this.typeBuilder);
            ilg.BeginMethod(
                nullableMapping.TypeDesc.Type,
                GetMethodBuilder(methodName),
                new Type[] { typeof(Boolean) },
                new string[] { "checkType" },
                CodeGenerator.PrivateMethodAttributes);

            LocalBuilder oLoc = ilg.DeclareLocal(nullableMapping.TypeDesc.Type, "o");

            ilg.LoadAddress(oLoc);
            ilg.InitObj(nullableMapping.TypeDesc.Type);
            MethodInfo XmlSerializationReader_ReadNull = typeof(XmlSerializationReader).GetMethod(
                "ReadNull",
                CodeGenerator.InstanceBindingFlags,
                null,
                CodeGenerator.EmptyTypeArray,
                null);
            ilg.Ldarg(0);
            ilg.Call(XmlSerializationReader_ReadNull);
            ilg.If();
            {
                ilg.Ldloc(oLoc);
                ilg.Stloc(ilg.ReturnLocal);
                ilg.Br(ilg.ReturnLabel);
            }
            ilg.EndIf();

            ElementAccessor element = new ElementAccessor();
            element.Mapping = nullableMapping.BaseMapping;
            element.Any = false;
            element.IsNullable = nullableMapping.BaseMapping.TypeDesc.IsNullable;

            WriteElement("o", null, null, element, null, null, false, false, -1, -1);
            ilg.Ldloc(oLoc);
            ilg.Stloc(ilg.ReturnLocal);
            ilg.Br(ilg.ReturnLabel);

            ilg.MarkLabel(ilg.ReturnLabel);
            ilg.Ldloc(ilg.ReturnLocal);
            ilg.EndMethod();
        }

        private void WriteStructMethod(StructMapping mapping)
        {
            string methodName = (string)MethodNames[mapping];

            ilg = new CodeGenerator(this.typeBuilder);
            List<Type> argTypes = new List<Type>(5);
            List<string> argNames = new List<string>(5);
            argTypes.Add(typeof(string));
            argNames.Add("n");
            argTypes.Add(typeof(string));
            argNames.Add("ns");
            argTypes.Add(mapping.TypeDesc.Type);
            argNames.Add("o");
            if (mapping.TypeDesc.IsNullable)
            {
                argTypes.Add(typeof(Boolean));
                argNames.Add("isNullable");
            }
            argTypes.Add(typeof(Boolean));
            argNames.Add("needType");
            ilg.BeginMethod(typeof(void),
                GetMethodBuilder(methodName),
                argTypes.ToArray(),
                argNames.ToArray(),
                CodeGenerator.PrivateMethodAttributes);
            if (mapping.TypeDesc.IsNullable)
            {
                ilg.If(ilg.GetArg("o"), Cmp.EqualTo, null);
                {
                    ilg.If(ilg.GetArg("isNullable"), Cmp.EqualTo, true);
                    {
                        MethodInfo XmlSerializationWriter_WriteNullTagLiteral = typeof(XmlSerializationWriter).GetMethod(
                                "WriteNullTagLiteral",
                                CodeGenerator.InstanceBindingFlags,
                                new Type[] { typeof(String), typeof(String) }
                                );
                        ilg.Ldarg(0);
                        ilg.Ldarg("n");
                        ilg.Ldarg("ns");
                        ilg.Call(XmlSerializationWriter_WriteNullTagLiteral);
                    }
                    ilg.EndIf();
                    ilg.GotoMethodEnd();
                }
                ilg.EndIf();
            }
            ilg.If(ilg.GetArg("needType"), Cmp.NotEqualTo, true); // if (!needType)

            LocalBuilder tLoc = ilg.DeclareLocal(typeof(Type), "t");
            MethodInfo Object_GetType = typeof(object).GetMethod(
                    "GetType",
                    CodeGenerator.InstanceBindingFlags,
                    Array.Empty<Type>()
                    );
            ArgBuilder oArg = ilg.GetArg("o");
            ilg.LdargAddress(oArg);
            ilg.ConvertAddress(oArg.ArgType, typeof(object));
            ilg.Call(Object_GetType);
            ilg.Stloc(tLoc);
            WriteTypeCompare("t", mapping.TypeDesc.Type);
            // Bool on the stack from WriteTypeCompare.
            ilg.If(); // if (t == typeof(...))
            WriteDerivedTypes(mapping);
            if (mapping.TypeDesc.IsRoot)
                WriteEnumAndArrayTypes();
            ilg.Else();
            if (mapping.TypeDesc.IsRoot)
            {
                MethodInfo XmlSerializationWriter_WriteTypedPrimitive = typeof(XmlSerializationWriter).GetMethod(
                        "WriteTypedPrimitive",
                        CodeGenerator.InstanceBindingFlags,
                        new Type[] { typeof(String), typeof(String), typeof(Object), typeof(Boolean) }
                        );
                ilg.Ldarg(0);
                ilg.Ldarg("n");
                ilg.Ldarg("ns");
                ilg.Ldarg("o");
                ilg.Ldc(true);
                ilg.Call(XmlSerializationWriter_WriteTypedPrimitive);
                ilg.GotoMethodEnd();
            }
            else
            {
                MethodInfo XmlSerializationWriter_CreateUnknownTypeException = typeof(XmlSerializationWriter).GetMethod(
                    "CreateUnknownTypeException",
                    CodeGenerator.InstanceBindingFlags,
                    new Type[] { typeof(Object) }
                    );
                ilg.Ldarg(0);
                ilg.Ldarg(oArg);
                ilg.ConvertValue(oArg.ArgType, typeof(Object));
                ilg.Call(XmlSerializationWriter_CreateUnknownTypeException);
                ilg.Throw();
            }
            ilg.EndIf(); // if (t == typeof(...))
            ilg.EndIf(); // if (!needType)

            if (!mapping.TypeDesc.IsAbstract)
            {
                if (mapping.TypeDesc.Type != null && typeof(XmlSchemaObject).IsAssignableFrom(mapping.TypeDesc.Type))
//.........这里部分代码省略.........

        private void WriteEnumMethod(EnumMapping mapping)
        {
            string methodName = (string)MethodNames[mapping];
            List<Type> argTypes = new List<Type>();
            List<string> argNames = new List<string>();
            argTypes.Add(mapping.TypeDesc.Type);
            argNames.Add("v");
            ilg = new CodeGenerator(this.typeBuilder);
            ilg.BeginMethod(
                typeof(string),
                GetMethodBuilder(methodName),
                argTypes.ToArray(),
                argNames.ToArray(),
                CodeGenerator.PrivateMethodAttributes);
            LocalBuilder sLoc = ilg.DeclareLocal(typeof(string), "s");
            ilg.Load(null);
            ilg.Stloc(sLoc);
            ConstantMapping[] constants = mapping.Constants;

            if (constants.Length > 0)
            {
                InternalHashtable values = new InternalHashtable();
                List<Label> caseLabels = new List<Label>();
                List<string> retValues = new List<string>();
                Label defaultLabel = ilg.DefineLabel();
                Label endSwitchLabel = ilg.DefineLabel();
                // This local is necessary; otherwise, it becomes if/else
                LocalBuilder localTmp = ilg.DeclareLocal(mapping.TypeDesc.Type, "localTmp");
                ilg.Ldarg("v");
                ilg.Stloc(localTmp);
                for (int i = 0; i < constants.Length; i++)
                {
                    ConstantMapping c = constants[i];
                    if (values[c.Value] == null)
                    {
                        Label caseLabel = ilg.DefineLabel();
                        ilg.Ldloc(localTmp);
                        ilg.Ldc(Enum.ToObject(mapping.TypeDesc.Type, c.Value));
                        ilg.Beq(caseLabel);
                        caseLabels.Add(caseLabel);
                        retValues.Add(GetCSharpString(c.XmlName));
                        values.Add(c.Value, c.Value);
                    }
                }


                if (mapping.IsFlags)
                {
                    ilg.Br(defaultLabel);
                    for (int i = 0; i < caseLabels.Count; i++)
                    {
                        ilg.MarkLabel(caseLabels[i]);
                        ilg.Ldc(retValues[i]);
                        ilg.Stloc(sLoc);
                        ilg.Br(endSwitchLabel);
                    }
                    ilg.MarkLabel(defaultLabel);
                    RaCodeGen.ILGenForEnumLongValue(ilg, "v");
                    LocalBuilder strArray = ilg.DeclareLocal(typeof(String[]), "strArray");
                    ilg.NewArray(typeof(String), constants.Length);
                    ilg.Stloc(strArray);
                    for (int i = 0; i < constants.Length; i++)
                    {
                        ConstantMapping c = constants[i];
                        ilg.Ldloc(strArray);
                        ilg.Ldc(i);
                        ilg.Ldstr(GetCSharpString(c.XmlName));
                        ilg.Stelem(typeof(String));
                    }
                    ilg.Ldloc(strArray);
                    LocalBuilder longArray = ilg.DeclareLocal(typeof(long[]), "longArray");
                    ilg.NewArray(typeof(long), constants.Length);
                    ilg.Stloc(longArray);

                    for (int i = 0; i < constants.Length; i++)
                    {
                        ConstantMapping c = constants[i];
                        ilg.Ldloc(longArray);
                        ilg.Ldc(i);
                        ilg.Ldc(c.Value);
                        ilg.Stelem(typeof(long));
                    }
                    ilg.Ldloc(longArray);
                    ilg.Ldstr(GetCSharpString(mapping.TypeDesc.FullName));
                    MethodInfo XmlSerializationWriter_FromEnum = typeof(XmlSerializationWriter).GetMethod(
                        "FromEnum",
                        CodeGenerator.StaticBindingFlags,
                        new Type[] { typeof(Int64), typeof(String[]), typeof(Int64[]), typeof(String) }
                        );
                    ilg.Call(XmlSerializationWriter_FromEnum);
                    ilg.Stloc(sLoc);
                    ilg.Br(endSwitchLabel);
                }
                else
                {
                    ilg.Br(defaultLabel);
                    // Case bodies
                    for (int i = 0; i < caseLabels.Count; i++)
                    {
                        ilg.MarkLabel(caseLabels[i]);
//.........这里部分代码省略.........

        private string GenerateMembersElement(XmlMembersMapping xmlMembersMapping)
        {
            ElementAccessor element = xmlMembersMapping.Accessor;
            MembersMapping mapping = (MembersMapping)element.Mapping;
            bool hasWrapperElement = mapping.HasWrapperElement;
            bool writeAccessors = mapping.WriteAccessors;
            string methodName = NextMethodName(element.Name);
            ilg = new CodeGenerator(this.typeBuilder);
            ilg.BeginMethod(
                typeof(void),
                methodName,
                new Type[] { typeof(object[]) },
                new string[] { "p" },
                CodeGenerator.PublicMethodAttributes
                );

            MethodInfo XmlSerializationWriter_WriteStartDocument = typeof(XmlSerializationWriter).GetMethod(
                "WriteStartDocument",
                CodeGenerator.InstanceBindingFlags,
                Array.Empty<Type>()
                );
            ilg.Ldarg(0);
            ilg.Call(XmlSerializationWriter_WriteStartDocument);

            MethodInfo XmlSerializationWriter_TopLevelElement = typeof(XmlSerializationWriter).GetMethod(
                "TopLevelElement",
                CodeGenerator.InstanceBindingFlags,
                Array.Empty<Type>()
                );
            ilg.Ldarg(0);
            ilg.Call(XmlSerializationWriter_TopLevelElement);

            // in the top-level method add check for the parameters length, 
            // because visual basic does not have a concept of an <out> parameter it uses <ByRef> instead
            // so sometime we think that we have more parameters then supplied
            LocalBuilder pLengthLoc = ilg.DeclareLocal(typeof(int), "pLength");
            ilg.Ldarg("p");
            ilg.Ldlen();
            ilg.Stloc(pLengthLoc);

            if (hasWrapperElement)
            {
                WriteStartElement(element.Name, (element.Form == XmlSchemaForm.Qualified ? element.Namespace : ""), false);

                int xmlnsMember = FindXmlnsIndex(mapping.Members);
                if (xmlnsMember >= 0)
                {
                    MemberMapping member = mapping.Members[xmlnsMember];
                    string source = "((" + typeof(XmlSerializerNamespaces).FullName + ")p[" + xmlnsMember.ToString(CultureInfo.InvariantCulture) + "])";

                    ilg.Ldloc(pLengthLoc);
                    ilg.Ldc(xmlnsMember);
                    ilg.If(Cmp.GreaterThan);
                    WriteNamespaces(source);
                    ilg.EndIf();
                }

                for (int i = 0; i < mapping.Members.Length; i++)
                {
                    MemberMapping member = mapping.Members[i];

                    if (member.Attribute != null && !member.Ignore)
                    {
                        SourceInfo source = new SourceInfo("p[" + i.ToString(CultureInfo.InvariantCulture) + "]", null, null, pLengthLoc.LocalType.GetElementType(), ilg);

                        SourceInfo specifiedSource = null;
                        int specifiedPosition = 0;
                        if (member.CheckSpecified != SpecifiedAccessor.None)
                        {
                            string memberNameSpecified = member.Name + "Specified";
                            for (int j = 0; j < mapping.Members.Length; j++)
                            {
                                if (mapping.Members[j].Name == memberNameSpecified)
                                {
                                    specifiedSource = new SourceInfo("((bool)p[" + j.ToString(CultureInfo.InvariantCulture) + "])", null, null, typeof(bool), ilg);
                                    specifiedPosition = j;
                                    break;
                                }
                            }
                        }

                        ilg.Ldloc(pLengthLoc);
                        ilg.Ldc(i);
                        ilg.If(Cmp.GreaterThan);

                        if (specifiedSource != null)
                        {
                            Label labelTrue = ilg.DefineLabel();
                            Label labelEnd = ilg.DefineLabel();
                            ilg.Ldloc(pLengthLoc);
                            ilg.Ldc(specifiedPosition);
                            ilg.Ble(labelTrue);
                            specifiedSource.Load(typeof(bool));
                            ilg.Br_S(labelEnd);
                            ilg.MarkLabel(labelTrue);
                            ilg.Ldc(true);
                            ilg.MarkLabel(labelEnd);
                            ilg.If();
                        }

//.........这里部分代码省略.........

        internal void ILGenForCreateInstance(CodeGenerator ilg, Type type, Type cast, bool nonPublic)
        {
            // Special case DBNull
            if (type == Globals.TypeOfDBNull)
            {
                FieldInfo DBNull_Value = Globals.TypeOfDBNull.GetField("Value", CodeGenerator.StaticBindingFlags);
                ilg.LoadMember(DBNull_Value);
                return;
            }

            // Special case XElement
            // codegen the same as 'internal XElement : this("default") { }'
            if (type.FullName == "System.Xml.Linq.XElement")
            {
                Type xName = type.GetTypeInfo().Assembly.GetType("System.Xml.Linq.XName");
                if (xName != null)
                {
                    MethodInfo XName_op_Implicit = xName.GetMethod(
                        "op_Implicit",
                        CodeGenerator.StaticBindingFlags,
                        new Type[] { typeof(String) }
                        );
                    ConstructorInfo XElement_ctor = type.GetConstructor(
                        CodeGenerator.InstanceBindingFlags,
                        new Type[] { xName }
                        );
                    if (XName_op_Implicit != null && XElement_ctor != null)
                    {
                        ilg.Ldstr("default");
                        ilg.Call(XName_op_Implicit);
                        ilg.New(XElement_ctor);
                        return;
                    }
                }
            }

            Label labelReturn = ilg.DefineLabel();
            Label labelEndIf = ilg.DefineLabel();

            // TypeInfo typeInfo = type.GetTypeInfo();
            // typeInfo not declared explicitly
            ilg.Ldc(type);
            MethodInfo getTypeInfoMehod = typeof(IntrospectionExtensions).GetMethod(
                  "GetTypeInfo",
                  CodeGenerator.StaticBindingFlags,
                  new[] { typeof(Type) }
                  );
            ilg.Call(getTypeInfoMehod);

            // IEnumerator<ConstructorInfo> e = typeInfo.DeclaredConstructors.GetEnumerator();
            LocalBuilder enumerator = ilg.DeclareLocal(typeof(IEnumerator<>).MakeGenericType(typeof(ConstructorInfo)), "e");
            MethodInfo getDeclaredConstructors = typeof(TypeInfo).GetMethod("get_DeclaredConstructors");
            MethodInfo getEnumerator = typeof(IEnumerable<>).MakeGenericType(typeof(ConstructorInfo)).GetMethod("GetEnumerator");
            ilg.Call(getDeclaredConstructors);
            ilg.Call(getEnumerator);
            ilg.Stloc(enumerator);

            ilg.WhileBegin();
            // ConstructorInfo constructorInfo = e.Current();
            MethodInfo enumeratorCurrent = typeof(IEnumerator).GetMethod("get_Current");
            ilg.Ldloc(enumerator);
            ilg.Call(enumeratorCurrent);
            LocalBuilder constructorInfo = ilg.DeclareLocal(typeof(ConstructorInfo), "constructorInfo");
            ilg.Stloc(constructorInfo);

            // if (!constructorInfo.IsStatic && constructorInfo.GetParameters.Length() == 0)
            ilg.Ldloc(constructorInfo);
            MethodInfo constructorIsStatic = typeof(ConstructorInfo).GetMethod("get_IsStatic");
            ilg.Call(constructorIsStatic);
            ilg.Brtrue(labelEndIf);
            ilg.Ldloc(constructorInfo);
            MethodInfo constructorGetParameters = typeof(ConstructorInfo).GetMethod("GetParameters");
            ilg.Call(constructorGetParameters);
            ilg.Ldlen();
            ilg.Ldc(0);
            ilg.Cne();
            ilg.Brtrue(labelEndIf);

            // constructorInfo.Invoke(null);
            MethodInfo constructorInvoke = typeof(ConstructorInfo).GetMethod("Invoke", new Type[] { typeof(object[]) });
            ilg.Ldloc(constructorInfo);
            ilg.Load(null);
            ilg.Call(constructorInvoke);
            ilg.Br(labelReturn);

            ilg.MarkLabel(labelEndIf);
            ilg.WhileBeginCondition(); // while (e.MoveNext())
            MethodInfo IEnumeratorMoveNext = typeof(IEnumerator).GetMethod(
                "MoveNext",
                CodeGenerator.InstanceBindingFlags,
                Array.Empty<Type>());
            ilg.Ldloc(enumerator);
            ilg.Call(IEnumeratorMoveNext);
            ilg.WhileEndCondition();
            ilg.WhileEnd();

            MethodInfo Activator_CreateInstance = typeof(Activator).GetMethod(
                  "CreateInstance",
                  CodeGenerator.StaticBindingFlags,
                  new Type[] { typeof(Type) }
//.........这里部分代码省略.........