C# CodeGenerator.Ldstr方法代码示例

        internal string GenerateTypedSerializer(string readMethod, string writeMethod, XmlMapping mapping, CodeIdentifiers classes, string baseSerializer, string readerClass, string writerClass)
        {
            string serializerName = CodeIdentifier.MakeValid(Accessor.UnescapeName(mapping.Accessor.Mapping.TypeDesc.Name));
            serializerName = classes.AddUnique(serializerName + "Serializer", mapping);

            TypeBuilder typedSerializerTypeBuilder = CodeGenerator.CreateTypeBuilder(
                _moduleBuilder,
                CodeIdentifier.GetCSharpName(serializerName),
                TypeAttributes.Public | TypeAttributes.Sealed | TypeAttributes.BeforeFieldInit,
                CreatedTypes[baseSerializer],
                Array.Empty<Type>()
                );

            ilg = new CodeGenerator(typedSerializerTypeBuilder);
            ilg.BeginMethod(
                typeof(Boolean),
                "CanDeserialize",
                new Type[] { typeof(XmlReader) },
                new string[] { "xmlReader" },
                CodeGenerator.PublicOverrideMethodAttributes
            );

            if (mapping.Accessor.Any)
            {
                ilg.Ldc(true);
                ilg.Stloc(ilg.ReturnLocal);
                ilg.Br(ilg.ReturnLabel);
            }
            else
            {
                MethodInfo XmlReader_IsStartElement = typeof(XmlReader).GetMethod(
                     "IsStartElement",
                     CodeGenerator.InstanceBindingFlags,
                     new Type[] { typeof(String), typeof(String) }
                     );
                ilg.Ldarg(ilg.GetArg("xmlReader"));
                ilg.Ldstr(GetCSharpString(mapping.Accessor.Name));
                ilg.Ldstr(GetCSharpString(mapping.Accessor.Namespace));
                ilg.Call(XmlReader_IsStartElement);
                ilg.Stloc(ilg.ReturnLocal);
                ilg.Br(ilg.ReturnLabel);
            }
            ilg.MarkLabel(ilg.ReturnLabel);
            ilg.Ldloc(ilg.ReturnLocal);
            ilg.EndMethod();

            if (writeMethod != null)
            {
                ilg = new CodeGenerator(typedSerializerTypeBuilder);
                ilg.BeginMethod(
                    typeof(void),
                    "Serialize",
                    new Type[] { typeof(object), typeof(XmlSerializationWriter) },
                    new string[] { "objectToSerialize", "writer" },
                    CodeGenerator.ProtectedOverrideMethodAttributes);
                MethodInfo writerType_writeMethod = CreatedTypes[writerClass].GetMethod(
                    writeMethod,
                    CodeGenerator.InstanceBindingFlags,
                    new Type[] { (mapping is XmlMembersMapping) ? typeof(object[]) : typeof(object) }
                    );
                ilg.Ldarg("writer");
                ilg.Castclass(CreatedTypes[writerClass]);
                ilg.Ldarg("objectToSerialize");
                if (mapping is XmlMembersMapping)
                {
                    ilg.ConvertValue(typeof(object), typeof(object[]));
                }
                ilg.Call(writerType_writeMethod);
                ilg.EndMethod();
            }
            if (readMethod != null)
            {
                ilg = new CodeGenerator(typedSerializerTypeBuilder);
                ilg.BeginMethod(
                    typeof(object),
                    "Deserialize",
                    new Type[] { typeof(XmlSerializationReader) },
                    new string[] { "reader" },
                    CodeGenerator.ProtectedOverrideMethodAttributes);
                MethodInfo readerType_readMethod = CreatedTypes[readerClass].GetMethod(
                    readMethod,
                    CodeGenerator.InstanceBindingFlags,
                    Array.Empty<Type>()
                    );
                ilg.Ldarg("reader");
                ilg.Castclass(CreatedTypes[readerClass]);
                ilg.Call(readerType_readMethod);
                ilg.EndMethod();
            }
            typedSerializerTypeBuilder.DefineDefaultConstructor(CodeGenerator.PublicMethodAttributes);
            Type typedSerializerType = typedSerializerTypeBuilder.CreateTypeInfo().AsType();
            CreatedTypes.Add(typedSerializerType.Name, typedSerializerType);

            return typedSerializerType.Name;
        }

 internal CreateXmlSerializableDelegate GenerateCreateXmlSerializableDelegate()
 {
     Type type = this.UnderlyingType;
     CodeGenerator ilg = new CodeGenerator();
     bool memberAccessFlag = RequiresMemberAccessForCreate(null) && !(type.FullName == "System.Xml.Linq.XElement");
     try
     {
         ilg.BeginMethod("Create" + DataContract.GetClrTypeFullName(type), typeof(CreateXmlSerializableDelegate), memberAccessFlag);
     }
     catch (SecurityException securityException)
     {
         if (memberAccessFlag)
         {
             RequiresMemberAccessForCreate(securityException);
         }
         else
         {
             throw;
         }
     }
     if (type.GetTypeInfo().IsValueType)
     {
         System.Reflection.Emit.LocalBuilder local = ilg.DeclareLocal(type, type.Name + "Value");
         ilg.Ldloca(local);
         ilg.InitObj(type);
         ilg.Ldloc(local);
     }
     else
     {
         // Special case XElement
         // codegen the same as 'internal XElement : this("default") { }'
         ConstructorInfo ctor = GetConstructor();
         if (!ctor.IsPublic && 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",
                     BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Public,
                     new Type[] { typeof(String) }
                     );
                 ConstructorInfo XElement_ctor = type.GetConstructor(
                     BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public,
                     new Type[] { xName }
                     );
                 if (XName_op_Implicit != null && XElement_ctor != null)
                 {
                     ilg.Ldstr("default");
                     ilg.Call(XName_op_Implicit);
                     ctor = XElement_ctor;
                 }
             }
         }
         ilg.New(ctor);
     }
     ilg.ConvertValue(this.UnderlyingType, Globals.TypeOfIXmlSerializable);
     ilg.Ret();
     return (CreateXmlSerializableDelegate)ilg.EndMethod();
 }

        internal void GenerateEnd(string[] methods, XmlMapping[] xmlMappings, Type[] types) {
            GenerateReferencedMethods();
            GenerateInitCallbacksMethod();

            ilg = new CodeGenerator(this.typeBuilder);
            ilg.BeginMethod(typeof(void), "InitIDs", CodeGenerator.EmptyTypeArray, CodeGenerator.EmptyStringArray,
                CodeGenerator.ProtectedOverrideMethodAttributes);
            MethodInfo XmlSerializationReader_get_Reader = typeof(XmlSerializationReader).GetMethod(
                 "get_Reader",
                 CodeGenerator.InstanceBindingFlags,
                 null,
                 CodeGenerator.EmptyTypeArray,
                 null
                 );
            MethodInfo XmlReader_get_NameTable = typeof(XmlReader).GetMethod(
                "get_NameTable",
                CodeGenerator.InstanceBindingFlags,
                null,
                 CodeGenerator.EmptyTypeArray,
                null
                );
            MethodInfo XmlNameTable_Add = typeof(XmlNameTable).GetMethod(
                "Add",
                CodeGenerator.InstanceBindingFlags,
                null,
                new Type[] { typeof(String) },
                null
                );
            foreach (string id in idNames.Keys) {
                // 
                ilg.Ldarg(0);
                ilg.Ldarg(0);
                ilg.Call(XmlSerializationReader_get_Reader);
                ilg.Call(XmlReader_get_NameTable);
                ilg.Ldstr(id);
                ilg.Call(XmlNameTable_Add);
                Debug.Assert(idNameFields.ContainsKey(id));
                ilg.StoreMember(idNameFields[id]);
            }
            ilg.EndMethod();

            this.typeBuilder.DefineDefaultConstructor(
                CodeGenerator.PublicMethodAttributes);
            Type readerType = this.typeBuilder.CreateType();
            CreatedTypes.Add(readerType.Name, readerType);
        }

        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;
        }

        void WriteEnumMethod(EnumMapping mapping) {
            MethodBuilder get_TableName = null;
            if (mapping.IsFlags)
                WriteHashtable(mapping, mapping.TypeDesc.Name, out get_TableName);

            string methodName = (string)MethodNames[mapping];
            string fullTypeName = mapping.TypeDesc.CSharpName;
            List<Type> argTypes = new List<Type>();
            List<string> argNames = new List<string>();
            Type returnType;
            Type underlyingType;

            returnType = mapping.TypeDesc.Type;
            underlyingType = Enum.GetUnderlyingType(returnType);
            argTypes.Add(typeof(string));
            argNames.Add("s");
            ilg = new CodeGenerator(this.typeBuilder);
            ilg.BeginMethod(
                returnType,
                GetMethodBuilder(methodName),
                argTypes.ToArray(),
                argNames.ToArray(),
                CodeGenerator.PrivateMethodAttributes);

            ConstantMapping[] constants = mapping.Constants;
            if (mapping.IsFlags) {
                {
                    MethodInfo XmlSerializationReader_ToEnum = typeof(XmlSerializationReader).GetMethod(
                        "ToEnum",
                        CodeGenerator.StaticBindingFlags,
                        null,
                        new Type[] { typeof(String), typeof(Hashtable), typeof(String) },
                        null
                        );
                    ilg.Ldarg("s");
                    ilg.Ldarg(0);
                    Debug.Assert(get_TableName != null);
                    ilg.Call(get_TableName);
                    ilg.Ldstr(fullTypeName);
                    ilg.Call(XmlSerializationReader_ToEnum);
                    // XmlSerializationReader_ToEnum return long!
                    if (underlyingType != typeof(long)) {
                        ilg.ConvertValue(typeof(long), underlyingType);
                    }
                    ilg.Stloc(ilg.ReturnLocal);
                    ilg.Br(ilg.ReturnLabel);
                }
            }
            else {
                List<Label> caseLabels = new List<Label>();
                List<object> retValues = new List<object>();
                Label defaultLabel = ilg.DefineLabel();
                Label endSwitchLabel = ilg.DefineLabel();
                // This local is necessary; otherwise, it becomes if/else
                LocalBuilder localTmp = ilg.GetTempLocal(typeof(string));
                ilg.Ldarg("s");
                ilg.Stloc(localTmp);
                ilg.Ldloc(localTmp);
                ilg.Brfalse(defaultLabel);
                Hashtable cases = new Hashtable();
                for (int i = 0; i < constants.Length; i++) {
                    ConstantMapping c = constants[i];

                    CodeIdentifier.CheckValidIdentifier(c.Name);
                    if (cases[c.XmlName] == null) {
                        cases[c.XmlName] = c.XmlName;
                        Label caseLabel = ilg.DefineLabel();
                        ilg.Ldloc(localTmp);
                        ilg.Ldstr(c.XmlName);
                        MethodInfo String_op_Equality = typeof(string).GetMethod(
                            "op_Equality",
                            CodeGenerator.StaticBindingFlags,
                            null,
                            new Type[] { typeof(string), typeof(string) },
                            null
                            );
                        ilg.Call(String_op_Equality);
                        ilg.Brtrue(caseLabel);
                        caseLabels.Add(caseLabel);
                        retValues.Add(Enum.ToObject(mapping.TypeDesc.Type, c.Value));
                    }
                }

                ilg.Br(defaultLabel);
                // Case bodies
                for (int i = 0; i < caseLabels.Count; i++) {
                    ilg.MarkLabel(caseLabels[i]);
                    ilg.Ldc(retValues[i]);
                    ilg.Stloc(ilg.ReturnLocal);
                    ilg.Br(ilg.ReturnLabel);
                }
                MethodInfo XmlSerializationReader_CreateUnknownConstantException = typeof(XmlSerializationReader).GetMethod(
                    "CreateUnknownConstantException",
                    CodeGenerator.InstanceBindingFlags,
                    null,
                    new Type[] { typeof(string), typeof(Type) },
                    null
                    );
                // Default body
                ilg.MarkLabel(defaultLabel);
//.........这里部分代码省略.........

//.........这里部分代码省略.........
                ilg.EndIf(); // if (isNull)
            }
            ilg.Ldloc(typeof(XmlQualifiedName), "xsiType");
            ilg.Load(null);
            ilg.Ceq();
            if (!structMapping.TypeDesc.IsRoot) {
                labelTrue = ilg.DefineLabel();
                labelEnd = ilg.DefineLabel();
                // xsiType == null
                ilg.Brtrue(labelTrue);
                WriteQNameEqual("xsiType", structMapping.TypeName, structMapping.Namespace);
                // Bool result for WriteQNameEqual is on the stack
                ilg.Br_S(labelEnd);
                ilg.MarkLabel(labelTrue);
                ilg.Ldc(true);
                ilg.MarkLabel(labelEnd);
            }
            ilg.If(); // if (xsiType == null
            if (structMapping.TypeDesc.IsRoot) {
                ConstructorInfo XmlQualifiedName_ctor = typeof(XmlQualifiedName).GetConstructor(
                    CodeGenerator.InstanceBindingFlags,
                    null,
                    new Type[] { typeof(String), typeof(String) },
                    null
                    );
                MethodInfo XmlSerializationReader_ReadTypedPrimitive = typeof(XmlSerializationReader).GetMethod(
                    "ReadTypedPrimitive",
                    CodeGenerator.InstanceBindingFlags,
                    null,
                    new Type[] { typeof(XmlQualifiedName) },
                    null
                    );
                ilg.Ldarg(0);
                ilg.Ldstr(Soap.UrType);
                ilg.Ldstr(XmlSchema.Namespace);
                ilg.New(XmlQualifiedName_ctor);
                ilg.Call(XmlSerializationReader_ReadTypedPrimitive);
                ilg.Stloc(ilg.ReturnLocal);
                ilg.Br(ilg.ReturnLabel);
            }
            WriteDerivedTypes(structMapping, !structMapping.TypeDesc.IsRoot, typeName);
            if (structMapping.TypeDesc.IsRoot) WriteEnumAndArrayTypes();
            ilg.Else(); // if (xsiType == null
            if (structMapping.TypeDesc.IsRoot) {
                MethodInfo XmlSerializationReader_ReadTypedPrimitive = typeof(XmlSerializationReader).GetMethod(
                    "ReadTypedPrimitive",
                    CodeGenerator.InstanceBindingFlags,
                    null,
                    new Type[] { locXsiType.LocalType },
                    null
                    );
                ilg.Ldarg(0);
                ilg.Ldloc(locXsiType);
                ilg.Call(XmlSerializationReader_ReadTypedPrimitive);
                ilg.Stloc(ilg.ReturnLocal);
                ilg.Br(ilg.ReturnLabel);
            }
            else {
                MethodInfo XmlSerializationReader_CreateUnknownTypeException = typeof(XmlSerializationReader).GetMethod(
                     "CreateUnknownTypeException",
                     CodeGenerator.InstanceBindingFlags,
                     null,
                     new Type[] { typeof(XmlQualifiedName) },
                     null
                     );
                ilg.Ldarg(0);

//.........这里部分代码省略.........
                }

                ilg.Ldarg(0);
                ilg.Ldarg("n");
                ilg.Ldarg("ns");
                ArgBuilder argO = ilg.GetArg("o");
                ilg.Ldarg(argO);
                ilg.ConvertValue(argO.ArgType, typeof(Object));
                ilg.Ldc(false);
                if (xmlnsSource == null)
                    ilg.Load(null);
                else
                {
                    System.Diagnostics.Debug.Assert(xmlnsSource.StartsWith("[email protected]", StringComparison.Ordinal));
                    ILGenLoad(xmlnsSource);
                }

                MethodInfo XmlSerializationWriter_WriteStartElement = typeof(XmlSerializationWriter).GetMethod(
                        "WriteStartElement",
                        CodeGenerator.InstanceBindingFlags,
                        new Type[] { typeof(String), typeof(String), typeof(Object), typeof(Boolean), typeof(XmlSerializerNamespaces) }
                        );
                ilg.Call(XmlSerializationWriter_WriteStartElement);
                if (!mapping.TypeDesc.IsRoot)
                {
                    ilg.If(ilg.GetArg("needType"), Cmp.EqualTo, true);
                    {
                        MethodInfo XmlSerializationWriter_WriteXsiType = typeof(XmlSerializationWriter).GetMethod(
                                "WriteXsiType",
                                CodeGenerator.InstanceBindingFlags,
                                new Type[] { typeof(String), typeof(String) }
                                );
                        ilg.Ldarg(0);
                        ilg.Ldstr(GetCSharpString(mapping.TypeName));
                        ilg.Ldstr(GetCSharpString(mapping.Namespace));
                        ilg.Call(XmlSerializationWriter_WriteXsiType);
                    }
                    ilg.EndIf();
                }
                for (int i = 0; i < members.Length; i++)
                {
                    MemberMapping m = members[i];
                    if (m.Attribute != null)
                    {
                        CodeIdentifier.CheckValidIdentifier(m.Name);
                        if (m.CheckShouldPersist)
                        {
                            ilg.LdargAddress(oArg);
                            ilg.Call(m.CheckShouldPersistMethodInfo);
                            ilg.If();
                        }
                        if (m.CheckSpecified != SpecifiedAccessor.None)
                        {
                            string memberGet = RaCodeGen.GetStringForMember("o", m.Name + "Specified", mapping.TypeDesc);
                            ILGenLoad(memberGet);
                            ilg.If();
                        }
                        WriteMember(RaCodeGen.GetSourceForMember("o", m, mapping.TypeDesc, ilg), m.Attribute, m.TypeDesc, "o");

                        if (m.CheckSpecified != SpecifiedAccessor.None)
                        {
                            ilg.EndIf();
                        }
                        if (m.CheckShouldPersist)
                        {
                            ilg.EndIf();

        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.........

        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.........

        internal void ILGenForCreateInstance(CodeGenerator ilg, Type type, Type cast, bool nonPublic) {
            // Special case DBNull
            if (type == typeof(DBNull)) {
                FieldInfo DBNull_Value = typeof(DBNull).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.Assembly.GetType("System.Xml.Linq.XName");
                if (xName != null) {
                    MethodInfo XName_op_Implicit = xName.GetMethod(
                        "op_Implicit",
                        CodeGenerator.StaticBindingFlags,
                        null,
                        new Type[] { typeof(String) },
                        null
                        );
                    ConstructorInfo XElement_ctor = type.GetConstructor(
                        CodeGenerator.InstanceBindingFlags,
                        null,
                        new Type[] { xName },
                        null
                        );
                    if (XName_op_Implicit != null && XElement_ctor != null) {
                        ilg.Ldstr("default");
                        ilg.Call(XName_op_Implicit);
                        ilg.New(XElement_ctor);
                        return;
                    }
                }
            }

            BindingFlags bindingFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.CreateInstance;
            if (nonPublic) {
                bindingFlags |= BindingFlags.NonPublic;
            }

            MethodInfo Activator_CreateInstance = typeof(Activator).GetMethod(
                  "CreateInstance",
                  CodeGenerator.StaticBindingFlags,
                  null,
                  new Type[] { typeof(Type), typeof(BindingFlags), typeof(Binder), typeof(Object[]), typeof(CultureInfo) },
                  null
                  );
            ilg.Ldc(type);
            ilg.Load((int)bindingFlags);
            ilg.Load(null);
            ilg.NewArray(typeof(Object), 0);
            ilg.Load(null);
            ilg.Call(Activator_CreateInstance);
            if (cast != null)
                ilg.ConvertValue(Activator_CreateInstance.ReturnType, cast);
        }

        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;
                    }
                }
            }

            MethodInfo Activator_CreateInstance = typeof(Activator).GetMethod(
                  "CreateInstance",
                  CodeGenerator.StaticBindingFlags,
                  new Type[] { typeof(Type) }
                  );
            ilg.Ldc(type);
            ilg.Call(Activator_CreateInstance);
            if (cast != null)
                ilg.ConvertValue(Activator_CreateInstance.ReturnType, cast);
        }