public static T CloneDeep <T>(T source)
{
Delegate @delegate = (Delegate)null;
if (!CloneUtility.cachedILDeep.TryGetValue(typeof(T), out @delegate))
{
DynamicMethod dynamicMethod = new DynamicMethod("DoClone", typeof(T), new Type[1] {
typeof(T)
}, Assembly.GetExecutingAssembly().ManifestModule, 1 != 0);
ConstructorInfo constructor = source.GetType().GetConstructor(new Type[0]);
ILGenerator ilGenerator = dynamicMethod.GetILGenerator();
ilGenerator.DeclareLocal(typeof(T));
ilGenerator.Emit(OpCodes.Newobj, constructor);
ilGenerator.Emit(OpCodes.Stloc_0);
foreach (FieldInfo field in typeof(T).GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))
{
if (field.FieldType.IsValueType || field.FieldType == typeof(string))
{
CloneUtility.CopyValueType(ilGenerator, field);
}
else if (field.FieldType.IsClass)
{
CloneUtility.CopyReferenceType(ilGenerator, field);
}
}
ilGenerator.Emit(OpCodes.Ldloc_0);
ilGenerator.Emit(OpCodes.Ret);
@delegate = dynamicMethod.CreateDelegate(typeof(Func <T, T>));
CloneUtility.cachedILDeep.Add(typeof(T), @delegate);
}
return(((Func <T, T>)@delegate)(source));
}
private static void CopyReferenceType(ILGenerator generator, FieldInfo field)
{
LocalBuilder localBuilder = generator.DeclareLocal(field.FieldType);
if (field.FieldType.GetInterface("IEnumerable") != (Type)null)
{
if (!field.FieldType.IsGenericType)
{
return;
}
Type type = Type.GetType("System.Collections.Generic.IEnumerable`1[" + field.FieldType.GetGenericArguments()[0].FullName + "]");
ConstructorInfo constructor = field.FieldType.GetConstructor(new Type[1] {
type
});
if (!(constructor != (ConstructorInfo)null))
{
return;
}
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldfld, field);
generator.Emit(OpCodes.Newobj, constructor);
generator.Emit(OpCodes.Stloc, localBuilder);
CloneUtility.PlaceNewTempObjInClone(generator, field, localBuilder);
}
else
{
CloneUtility.CreateNewTempObject(generator, field.FieldType, localBuilder);
CloneUtility.PlaceNewTempObjInClone(generator, field, localBuilder);
foreach (FieldInfo field1 in field.FieldType.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))
{
if (field1.FieldType.IsValueType || field1.FieldType == typeof(string))
{
CloneUtility.CopyValueTypeTemp(generator, field, field1);
}
else if (field1.FieldType.IsClass)
{
CloneUtility.CopyReferenceType(generator, field1);
}
}
}
}
