C# Serialization.SourceInfo类代码示例

        void WriteQualifiedNameElement(string name, string ns, object defaultValue, SourceInfo source, bool nullable, TypeMapping mapping) {
            bool hasDefault = defaultValue != null && defaultValue != DBNull.Value;
            if (hasDefault) {
                throw CodeGenerator.NotSupported("XmlQualifiedName DefaultValue not supported.  Fail in WriteValue()");
            }
            List<Type> argTypes = new List<Type>();
            ilg.Ldarg(0);
            ilg.Ldstr(name);
            argTypes.Add(typeof(string));
            if (ns != null) {
                ilg.Ldstr(ns);
                argTypes.Add(typeof(string));
            }
            source.Load(mapping.TypeDesc.Type);
            argTypes.Add(mapping.TypeDesc.Type);

            MethodInfo XmlSerializationWriter_WriteXXX = typeof(XmlSerializationWriter).GetMethod(
                 nullable ? ("WriteNullableQualifiedNameLiteral") : "WriteElementQualifiedName",
                 CodeGenerator.InstanceBindingFlags,
                 null,
                 argTypes.ToArray(),
                 null
                 );
            ilg.Call(XmlSerializationWriter_WriteXXX);

            if (hasDefault) {
                throw CodeGenerator.NotSupported("XmlQualifiedName DefaultValue not supported.  Fail in WriteValue()");
            }
        }

 private void WriteInstanceOf(SourceInfo source, Type type)
 {
     RaCodeGen.WriteInstanceOf(source, type, ilg);
 }

 private void WriteArrayLocalDecl(string typeName, string variableName, SourceInfo initValue, TypeDesc arrayTypeDesc)
 {
     RaCodeGen.WriteArrayLocalDecl(typeName, variableName, initValue, arrayTypeDesc);
 }

 private void WriteChoiceTypeCheck(SourceInfo source, string fullTypeName, ChoiceIdentifierAccessor choice, string enumName, TypeDesc typeDesc)
 {
     Label labelFalse = ilg.DefineLabel();
     Label labelEnd = ilg.DefineLabel();
     source.Load(typeof(object));
     ilg.Load(null);
     ilg.Beq(labelFalse);
     WriteInstanceOf(source, typeDesc.Type);
     // Negative
     ilg.Ldc(false);
     ilg.Ceq();
     ilg.Br(labelEnd);
     ilg.MarkLabel(labelFalse);
     ilg.Ldc(false);
     ilg.MarkLabel(labelEnd);
     ilg.If();
     MethodInfo XmlSerializationWriter_CreateMismatchChoiceException = typeof(XmlSerializationWriter).GetMethod(
         "CreateMismatchChoiceException",
         CodeGenerator.InstanceBindingFlags,
         new Type[] { typeof(String), typeof(String), typeof(String) }
         );
     ilg.Ldarg(0);
     ilg.Ldstr(GetCSharpString(typeDesc.FullName));
     ilg.Ldstr(GetCSharpString(choice.MemberName));
     ilg.Ldstr(GetCSharpString(enumName));
     ilg.Call(XmlSerializationWriter_CreateMismatchChoiceException);
     ilg.Throw();
     ilg.EndIf();
 }

 private void WriteCheckDefault(SourceInfo source, object value, bool isNullable)
 {
     if (value is string && ((string)value).Length == 0)
     {
         // special case for string compare
         Label labelEnd = ilg.DefineLabel();
         Label labelFalse = ilg.DefineLabel();
         Label labelTrue = ilg.DefineLabel();
         source.Load(typeof(string));
         if (isNullable)
             // check == null with false
             ilg.Brfalse(labelTrue);
         else
             //check != null with false
             ilg.Brfalse(labelFalse);
         MethodInfo String_get_Length = typeof(string).GetMethod(
             "get_Length",
             CodeGenerator.InstanceBindingFlags,
             Array.Empty<Type>()
             );
         source.Load(typeof(string));
         ilg.Call(String_get_Length);
         ilg.Ldc(0);
         ilg.Cne();
         ilg.Br(labelEnd);
         if (isNullable)
         {
             ilg.MarkLabel(labelTrue);
             ilg.Ldc(true);
         }
         else
         {
             ilg.MarkLabel(labelFalse);
             ilg.Ldc(false);
         }
         ilg.MarkLabel(labelEnd);
         ilg.If();
     }
     else
     {
         if (value == null)
         {
             source.Load(typeof(object));
             ilg.Load(null);
             ilg.Cne();
         }
         else if (value.GetType().GetTypeInfo().IsPrimitive)
         {
             source.Load(null);
             ilg.Ldc(Convert.ChangeType(value, source.Type, CultureInfo.InvariantCulture));
             ilg.Cne();
         }
         else
         {
             Type valueType = value.GetType();
             source.Load(valueType);
             ilg.Ldc(value is string ? GetCSharpString((string)value) : value);
             MethodInfo op_Inequality = valueType.GetMethod(
                         "op_Inequality",
                         CodeGenerator.StaticBindingFlags,
                         new Type[] { valueType, valueType }
                         );
             if (op_Inequality != null)
                 ilg.Call(op_Inequality);
             else
                 ilg.Cne();
         }
         ilg.If();
     }
 }

        private void WriteMember(SourceInfo source, AttributeAccessor attribute, TypeDesc memberTypeDesc, string parent)
        {
            if (memberTypeDesc.IsAbstract) return;
            if (memberTypeDesc.IsArrayLike)
            {
                string aVar = "a" + memberTypeDesc.Name;
                string aiVar = "ai" + memberTypeDesc.Name;
                string iVar = "i";
                string fullTypeName = memberTypeDesc.CSharpName;
                WriteArrayLocalDecl(fullTypeName, aVar, source, memberTypeDesc);
                if (memberTypeDesc.IsNullable)
                {
                    ilg.Ldloc(memberTypeDesc.Type, aVar);
                    ilg.Load(null);
                    ilg.If(Cmp.NotEqualTo);
                }
                if (attribute.IsList)
                {
                    if (CanOptimizeWriteListSequence(memberTypeDesc.ArrayElementTypeDesc))
                    {
                        string ns = attribute.Form == XmlSchemaForm.Qualified ? attribute.Namespace : String.Empty;
                        MethodInfo XmlSerializationWriter_get_Writer = typeof(XmlSerializationWriter).GetMethod(
                            "get_Writer",
                            CodeGenerator.InstanceBindingFlags,
                            Array.Empty<Type>()
                            );
                        MethodInfo XmlWriter_WriteStartAttribute = typeof(XmlWriter).GetMethod(
                            "WriteStartAttribute",
                            CodeGenerator.InstanceBindingFlags,
                            new Type[] { typeof(String), typeof(String), typeof(String) }
                            );
                        ilg.Ldarg(0);
                        ilg.Call(XmlSerializationWriter_get_Writer);
                        ilg.Load(null);
                        ilg.Ldstr(GetCSharpString(attribute.Name));
                        ilg.Ldstr(GetCSharpString(ns));
                        ilg.Call(XmlWriter_WriteStartAttribute);
                    }
                    else
                    {
                        LocalBuilder sbLoc = ilg.DeclareOrGetLocal(typeof(StringBuilder), "sb");
                        ConstructorInfo StringBuilder_ctor = typeof(StringBuilder).GetConstructor(
                            CodeGenerator.InstanceBindingFlags,
                            Array.Empty<Type>()
                            );
                        ilg.New(StringBuilder_ctor);
                        ilg.Stloc(sbLoc);
                    }
                }
                TypeDesc arrayElementTypeDesc = memberTypeDesc.ArrayElementTypeDesc;

                if (memberTypeDesc.IsEnumerable)
                {
                    throw Globals.NotSupported("CDF15337, DDB176069: Also fail in whidbey IEnumerable member with XmlAttributeAttribute");
                }
                else
                {
                    LocalBuilder localI = ilg.DeclareOrGetLocal(typeof(Int32), iVar);
                    ilg.For(localI, 0, ilg.GetLocal(aVar));
                    WriteLocalDecl(aiVar, RaCodeGen.GetStringForArrayMember(aVar, iVar, memberTypeDesc), arrayElementTypeDesc.Type);
                }
                if (attribute.IsList)
                {
                    string methodName;
                    Type methodType;
                    Type argType = typeof(string);
                    // check to see if we can write values of the attribute sequentially
                    if (CanOptimizeWriteListSequence(memberTypeDesc.ArrayElementTypeDesc))
                    {
                        ilg.Ldloc(iVar);
                        ilg.Ldc(0);
                        ilg.If(Cmp.NotEqualTo);
                        MethodInfo XmlSerializationWriter_get_Writer = typeof(XmlSerializationWriter).GetMethod(
                            "get_Writer",
                            CodeGenerator.InstanceBindingFlags,
                            Array.Empty<Type>()
                            );
                        MethodInfo XmlWriter_WriteString = typeof(XmlWriter).GetMethod(
                            "WriteString",
                            CodeGenerator.InstanceBindingFlags,
                            new Type[] { typeof(String) }
                            );
                        ilg.Ldarg(0);
                        ilg.Call(XmlSerializationWriter_get_Writer);
                        ilg.Ldstr(" ");
                        ilg.Call(XmlWriter_WriteString);
                        ilg.EndIf();
                        ilg.Ldarg(0);
                        methodName = "WriteValue";
                        methodType = typeof(XmlSerializationWriter);
                    }
                    else
                    {
                        MethodInfo StringBuilder_Append = typeof(StringBuilder).GetMethod(
                            "Append",
                            CodeGenerator.InstanceBindingFlags,
                            new Type[] { typeof(string) }
                            );
                        ilg.Ldloc(iVar);
                        ilg.Ldc(0);
//.........这里部分代码省略.........

 void WriteLocalDecl(string variableName, SourceInfo initValue) {
     RaCodeGen.WriteLocalDecl(variableName, initValue);
 }

 private void WriteText(SourceInfo source, TextAccessor text)
 {
     if (text.Mapping is PrimitiveMapping)
     {
         PrimitiveMapping mapping = (PrimitiveMapping)text.Mapping;
         Type argType;
         ilg.Ldarg(0);
         if (text.Mapping is EnumMapping)
         {
             WriteEnumValue((EnumMapping)text.Mapping, source, out argType);
         }
         else
         {
             WritePrimitiveValue(mapping.TypeDesc, source, out argType);
         }
         MethodInfo XmlSerializationWriter_WriteValue = typeof(XmlSerializationWriter).GetMethod(
             "WriteValue",
             CodeGenerator.InstanceBindingFlags,
             new Type[] { argType }
             );
         ilg.Call(XmlSerializationWriter_WriteValue);
     }
     else if (text.Mapping is SpecialMapping)
     {
         SpecialMapping mapping = (SpecialMapping)text.Mapping;
         switch (mapping.TypeDesc.Kind)
         {
             case TypeKind.Node:
                 MethodInfo WriteTo = source.Type.GetMethod(
                     "WriteTo",
                     CodeGenerator.InstanceBindingFlags,
                     new Type[] { typeof(XmlWriter) }
                     );
                 MethodInfo XmlSerializationWriter_get_Writer = typeof(XmlSerializationWriter).GetMethod(
                     "get_Writer",
                     CodeGenerator.InstanceBindingFlags,
                     Array.Empty<Type>()
                     );
                 source.Load(source.Type);
                 ilg.Ldarg(0);
                 ilg.Call(XmlSerializationWriter_get_Writer);
                 ilg.Call(WriteTo);
                 break;
             default:
                 throw new InvalidOperationException(SR.XmlInternalError);
         }
     }
 }

        private void WriteElements(SourceInfo source, string enumSource, ElementAccessor[] elements, TextAccessor text, ChoiceIdentifierAccessor choice, string arrayName, bool writeAccessors, bool isNullable)
        {
            if (elements.Length == 0 && text == null) return;
            if (elements.Length == 1 && text == null)
            {
                TypeDesc td = elements[0].IsUnbounded ? elements[0].Mapping.TypeDesc.CreateArrayTypeDesc() : elements[0].Mapping.TypeDesc;
                if (!elements[0].Any && !elements[0].Mapping.TypeDesc.IsOptionalValue)
                    source = source.CastTo(td);
                WriteElement(source, elements[0], arrayName, writeAccessors);
            }
            else
            {
                bool doEndIf = false;
                if (isNullable && choice == null)
                {
                    source.Load(typeof(object));
                    ilg.Load(null);
                    ilg.If(Cmp.NotEqualTo);
                    doEndIf = true;
                }
                int anyCount = 0;
                ArrayList namedAnys = new ArrayList();
                ElementAccessor unnamedAny = null; // can only have one
                bool wroteFirstIf = false;
                string enumTypeName = choice == null ? null : choice.Mapping.TypeDesc.FullName;

                for (int i = 0; i < elements.Length; i++)
                {
                    ElementAccessor element = elements[i];

                    if (element.Any)
                    {
                        anyCount++;
                        if (element.Name != null && element.Name.Length > 0)
                            namedAnys.Add(element);
                        else if (unnamedAny == null)
                            unnamedAny = element;
                    }
                    else if (choice != null)
                    {
                        string fullTypeName = element.Mapping.TypeDesc.CSharpName;
                        object enumValue;
                        string enumFullName = enumTypeName + "[email protected]" + FindChoiceEnumValue(element, (EnumMapping)choice.Mapping, out enumValue);

                        if (wroteFirstIf) ilg.InitElseIf();
                        else { wroteFirstIf = true; ilg.InitIf(); }
                        ILGenLoad(enumSource, choice == null ? null : choice.Mapping.TypeDesc.Type);
                        ilg.Load(enumValue);
                        ilg.Ceq();
                        if (isNullable && !element.IsNullable)
                        {
                            Label labelFalse = ilg.DefineLabel();
                            Label labelEnd = ilg.DefineLabel();
                            ilg.Brfalse(labelFalse);
                            source.Load(typeof(object));
                            ilg.Load(null);
                            ilg.Cne();
                            ilg.Br_S(labelEnd);
                            ilg.MarkLabel(labelFalse);
                            ilg.Ldc(false);
                            ilg.MarkLabel(labelEnd);
                        }
                        ilg.AndIf();

                        WriteChoiceTypeCheck(source, fullTypeName, choice, enumFullName, element.Mapping.TypeDesc);

                        SourceInfo castedSource = source;
                        castedSource = source.CastTo(element.Mapping.TypeDesc);
                        WriteElement(element.Any ? source : castedSource, element, arrayName, writeAccessors);
                    }
                    else
                    {
                        TypeDesc td = element.IsUnbounded ? element.Mapping.TypeDesc.CreateArrayTypeDesc() : element.Mapping.TypeDesc;
                        string fullTypeName = td.CSharpName;
                        if (wroteFirstIf) ilg.InitElseIf();
                        else { wroteFirstIf = true; ilg.InitIf(); }
                        WriteInstanceOf(source, td.Type);
                        // WriteInstanceOf leave bool on the stack
                        ilg.AndIf();
                        SourceInfo castedSource = source;
                        castedSource = source.CastTo(td);
                        WriteElement(element.Any ? source : castedSource, element, arrayName, writeAccessors);
                    }
                }
                if (wroteFirstIf)
                {
                    if (anyCount > 0)
                    {
                        // See "else " below
                        if (elements.Length - anyCount > 0)
                        { // NOOP
                        }
                        else ilg.EndIf();
                    }
                }
                if (anyCount > 0)
                {
                    if (elements.Length - anyCount > 0) ilg.InitElseIf();
                    else ilg.InitIf();

//.........这里部分代码省略.........

 private void WritePrimitiveValue(TypeDesc typeDesc, SourceInfo source, out Type returnType)
 {
     if (typeDesc == StringTypeDesc || typeDesc.FormatterName == "String")
     {
         source.Load(typeDesc.Type);
         returnType = typeDesc.Type;
     }
     else
     {
         if (!typeDesc.HasCustomFormatter)
         {
             Type argType = typeDesc.Type;
             // No ToString(Byte), compiler used ToString(Int16) instead.
             if (argType == typeof(Byte))
                 argType = typeof(Int16);
             // No ToString(UInt16), compiler used ToString(Int32) instead.
             else if (argType == typeof(UInt16))
                 argType = typeof(Int32);
             MethodInfo XmlConvert_ToString = typeof(XmlConvert).GetMethod(
                 "ToString",
                 CodeGenerator.StaticBindingFlags,
                 new Type[] { argType }
                 );
             source.Load(typeDesc.Type);
             ilg.Call(XmlConvert_ToString);
             returnType = XmlConvert_ToString.ReturnType;
         }
         else
         {
             // Only these methods below that is non Static and need to ldarg("this") for Call.
             BindingFlags bindingFlags = CodeGenerator.StaticBindingFlags;
             if (typeDesc.FormatterName == "XmlQualifiedName")
             {
                 bindingFlags = CodeGenerator.InstanceBindingFlags;
                 ilg.Ldarg(0);
             }
             MethodInfo FromXXX = typeof(XmlSerializationWriter).GetMethod(
                    "From" + typeDesc.FormatterName,
                    bindingFlags,
                    new Type[] { typeDesc.Type }
                    );
             source.Load(typeDesc.Type);
             ilg.Call(FromXXX);
             returnType = FromXXX.ReturnType;
         }
     }
 }

        private void WriteArray(SourceInfo source, string choiceSource, ElementAccessor[] elements, TextAccessor text, ChoiceIdentifierAccessor choice, TypeDesc arrayTypeDesc)
        {
            if (elements.Length == 0 && text == null) return;
            string arrayTypeName = arrayTypeDesc.CSharpName;
            string aName = "a" + arrayTypeDesc.Name;
            WriteArrayLocalDecl(arrayTypeName, aName, source, arrayTypeDesc);
            LocalBuilder aLoc = ilg.GetLocal(aName);
            if (arrayTypeDesc.IsNullable)
            {
                ilg.Ldloc(aLoc);
                ilg.Load(null);
                ilg.If(Cmp.NotEqualTo);
            }

            string cName = null;
            if (choice != null)
            {
                string choiceFullName = choice.Mapping.TypeDesc.CSharpName;
                SourceInfo choiceSourceInfo = new SourceInfo(choiceSource, null, choice.MemberInfo, null, ilg);
                cName = "c" + choice.Mapping.TypeDesc.Name;
                WriteArrayLocalDecl(choiceFullName + "[]", cName, choiceSourceInfo, choice.Mapping.TypeDesc);
                // write check for the choice identifier array
                Label labelEnd = ilg.DefineLabel();
                Label labelTrue = ilg.DefineLabel();
                LocalBuilder cLoc = ilg.GetLocal(cName);
                ilg.Ldloc(cLoc);
                ilg.Load(null);
                ilg.Beq(labelTrue);
                ilg.Ldloc(cLoc);
                ilg.Ldlen();
                ilg.Ldloc(aLoc);
                ilg.Ldlen();
                ilg.Clt();
                ilg.Br(labelEnd);
                ilg.MarkLabel(labelTrue);
                ilg.Ldc(true);
                ilg.MarkLabel(labelEnd);
                ilg.If();
                MethodInfo XmlSerializationWriter_CreateInvalidChoiceIdentifierValueException = typeof(XmlSerializationWriter).GetMethod(
                    "CreateInvalidChoiceIdentifierValueException",
                    CodeGenerator.InstanceBindingFlags,
                    new Type[] { typeof(String), typeof(String) }
                    );
                ilg.Ldarg(0);
                ilg.Ldstr(GetCSharpString(choice.Mapping.TypeDesc.FullName));
                ilg.Ldstr(GetCSharpString(choice.MemberName));
                ilg.Call(XmlSerializationWriter_CreateInvalidChoiceIdentifierValueException);
                ilg.Throw();
                ilg.EndIf();
            }

            WriteArrayItems(elements, text, choice, arrayTypeDesc, aName, cName);
            if (arrayTypeDesc.IsNullable)
            {
                ilg.EndIf();
            }
        }

 private void WriteAttribute(SourceInfo source, AttributeAccessor attribute, string parent)
 {
     if (attribute.Mapping is SpecialMapping)
     {
         SpecialMapping special = (SpecialMapping)attribute.Mapping;
         if (special.TypeDesc.Kind == TypeKind.Attribute || special.TypeDesc.CanBeAttributeValue)
         {
             System.Diagnostics.Debug.Assert(parent == "o" || parent == "p");
             MethodInfo XmlSerializationWriter_WriteXmlAttribute = typeof(XmlSerializationWriter).GetMethod(
                 "WriteXmlAttribute",
                 CodeGenerator.InstanceBindingFlags,
                 new Type[] { typeof(XmlNode), typeof(Object) }
                 );
             ilg.Ldarg(0);
             ilg.Ldloc(source.Source);
             ilg.Ldarg(parent);
             ilg.ConvertValue(ilg.GetArg(parent).ArgType, typeof(Object));
             ilg.Call(XmlSerializationWriter_WriteXmlAttribute);
         }
         else
             throw new InvalidOperationException(SR.XmlInternalError);
     }
     else
     {
         TypeDesc typeDesc = attribute.Mapping.TypeDesc;
         source = source.CastTo(typeDesc);
         WritePrimitive("WriteAttribute", attribute.Name, attribute.Form == XmlSchemaForm.Qualified ? attribute.Namespace : "", attribute.Default, source, attribute.Mapping, false, false, false);
     }
 }

        private void WriteEnumValue(EnumMapping mapping, SourceInfo source, out Type returnType)
        {
            string methodName = ReferenceMapping(mapping);

#if DEBUG
            // use exception in the place of Debug.Assert to avoid throwing asserts from a server process such as aspnet_ewp.exe
            if (methodName == null) throw new InvalidOperationException(SR.Format(SR.XmlInternalErrorMethod, mapping.TypeDesc.Name));
#endif

            // For enum, its write method (eg. Write1_Gender) could be called multiple times
            // prior to its declaration.
            MethodBuilder methodBuilder = EnsureMethodBuilder(typeBuilder,
                    methodName,
                    CodeGenerator.PrivateMethodAttributes,
                    typeof(string),
                    new Type[] { mapping.TypeDesc.Type });
            ilg.Ldarg(0);
            source.Load(mapping.TypeDesc.Type);
            ilg.Call(methodBuilder);
            returnType = typeof(string);
        }

 internal void WriteLocalDecl(string variableName, SourceInfo initValue)
 {
     Type localType = initValue.Type;
     LocalBuilder localA = initValue.ILG.DeclareOrGetLocal(localType, variableName);
     if (initValue.Source != null)
     {
         if (initValue == "null")
         {
             initValue.ILG.Load(null);
         }
         else
         {
             if (initValue.Arg.StartsWith("[email protected]", StringComparison.Ordinal))
             {
                 Debug.Assert(initValue.MemberInfo != null);
                 Debug.Assert(initValue.MemberInfo.Name == initValue.Arg.Substring(3));
                 initValue.ILG.LoadMember(initValue.ILG.GetLocal("o"), initValue.MemberInfo);
             }
             else if (initValue.Source.EndsWith("]", StringComparison.Ordinal))
             {
                 initValue.Load(initValue.Type);
             }
             else if (initValue.Source == "fixup.Source" || initValue.Source == "e.Current")
             {
                 String[] vars = initValue.Source.Split('.');
                 object fixup = initValue.ILG.GetVariable(vars[0]);
                 PropertyInfo propInfo = initValue.ILG.GetVariableType(fixup).GetProperty(vars[1]);
                 initValue.ILG.LoadMember(fixup, propInfo);
                 initValue.ILG.ConvertValue(propInfo.PropertyType, localA.LocalType);
             }
             else
             {
                 object sVar = initValue.ILG.GetVariable(initValue.Arg);
                 initValue.ILG.Load(sVar);
                 initValue.ILG.ConvertValue(initValue.ILG.GetVariableType(sVar), localA.LocalType);
             }
         }
         initValue.ILG.Stloc(localA);
     }
 }

        private void WriteElement(SourceInfo source, ElementAccessor element, string arrayName, bool writeAccessor)
        {
            string name = writeAccessor ? element.Name : element.Mapping.TypeName;
            string ns = element.Any && element.Name.Length == 0 ? null : (element.Form == XmlSchemaForm.Qualified ? (writeAccessor ? element.Namespace : element.Mapping.Namespace) : "");
            if (element.Mapping is NullableMapping)
            {
                if (source.Type == element.Mapping.TypeDesc.Type)
                {
                    MethodInfo Nullable_get_HasValue = element.Mapping.TypeDesc.Type.GetMethod(
                        "get_HasValue",
                        CodeGenerator.InstanceBindingFlags,
                        Array.Empty<Type>()
                        );
                    source.LoadAddress(element.Mapping.TypeDesc.Type);
                    ilg.Call(Nullable_get_HasValue);
                }
                else
                {
                    source.Load(null);
                    ilg.Load(null);
                    ilg.Cne();
                }
                ilg.If();
                string fullTypeName = element.Mapping.TypeDesc.BaseTypeDesc.CSharpName;
                SourceInfo castedSource = source.CastTo(element.Mapping.TypeDesc.BaseTypeDesc);
                ElementAccessor e = element.Clone();
                e.Mapping = ((NullableMapping)element.Mapping).BaseMapping;
                WriteElement(e.Any ? source : castedSource, e, arrayName, writeAccessor);
                if (element.IsNullable)
                {
                    ilg.Else();
                    WriteLiteralNullTag(element.Name, element.Form == XmlSchemaForm.Qualified ? element.Namespace : "");
                }
                ilg.EndIf();
            }
            else if (element.Mapping is ArrayMapping)
            {
                ArrayMapping mapping = (ArrayMapping)element.Mapping;
                if (element.IsUnbounded)
                {
                    throw Globals.NotSupported("Unreachable: IsUnbounded is never set true!");
                }
                else
                {
                    ilg.EnterScope();
                    string fullTypeName = mapping.TypeDesc.CSharpName;
                    WriteArrayLocalDecl(fullTypeName, arrayName, source, mapping.TypeDesc);
                    if (element.IsNullable)
                    {
                        WriteNullCheckBegin(arrayName, element);
                    }
                    else
                    {
                        if (mapping.TypeDesc.IsNullable)
                        {
                            ilg.Ldloc(ilg.GetLocal(arrayName));
                            ilg.Load(null);
                            ilg.If(Cmp.NotEqualTo);
                        }
                    }
                    WriteStartElement(name, ns, false);
                    WriteArrayItems(mapping.ElementsSortedByDerivation, null, null, mapping.TypeDesc, arrayName, null);
                    WriteEndElement();
                    if (element.IsNullable)
                    {
                        ilg.EndIf();
                    }
                    else
                    {
                        if (mapping.TypeDesc.IsNullable)
                        {
                            ilg.EndIf();
                        }
                    }
                    ilg.ExitScope();
                }
            }
            else if (element.Mapping is EnumMapping)
            {
                WritePrimitive("WriteElementString", name, ns, element.Default, source, element.Mapping, false, true, element.IsNullable);
            }
            else if (element.Mapping is PrimitiveMapping)
            {
                PrimitiveMapping mapping = (PrimitiveMapping)element.Mapping;
                if (mapping.TypeDesc == QnameTypeDesc)
                    WriteQualifiedNameElement(name, ns, element.Default, source, element.IsNullable, mapping);
                else
                {
                    string suffixRaw = mapping.TypeDesc.XmlEncodingNotRequired ? "Raw" : "";
                    WritePrimitive(element.IsNullable ? ("WriteNullableStringLiteral" + suffixRaw) : ("WriteElementString" + suffixRaw),
                                   name, ns, element.Default, source, mapping, false, true, element.IsNullable);
                }
            }
            else if (element.Mapping is StructMapping)
            {
                StructMapping mapping = (StructMapping)element.Mapping;

                string methodName = ReferenceMapping(mapping);

#if DEBUG
//.........这里部分代码省略.........