public DeepCloneClass(Type type)
{
Debug.Assert(!type.IsValueType);
_type = type;
_cloneFields = DeepCloneHelper
.GetDeepCloneFields(type)
.Select(x => new FieldClone(x))
.ToArray();
}
private static void EmitClone(this ILGenerator il, Type type)
{
var fields = DeepCloneHelper
.GetDeepCloneFields(type)
.ToArray();
if (fields.Length == 0)
{
// nothing to clone
il.EmitCreateObject(type);
return;
}
var src = il.DeclareLocal(type).LocalIndex;
var dest = il.DeclareLocal(type).LocalIndex;
// src = (type)p_1;
il.EmitLdarg(1);
il.EmitUnBoxAnyOrCastClass(type);
il.EmitStloc(src);
// dest = (type)CreateObject(type);
il.EmitCreateObject(type);
il.EmitUnBoxAnyOrCastClass(type);
il.EmitStloc(dest);
foreach (var field in fields)
{
Debug.Assert(field.CloneType != CloneType.Ignore);
var fieldInfo = field.Field;
if (type.IsValueType)
{
il.EmitLdloca(dest);
}
else
{
il.EmitLdloc(dest);
}
if (field.CloneType == CloneType.Deep)
{
// ctx
il.EmitLdarg(0);
// (object)src.Field
il.EmitLdloc(src);
il.EmitFieldGet(fieldInfo);
il.EmitBox(fieldInfo.FieldType);
// ctx.Clone()
il.EmitMethodCall(_ctxClone);
// (object)
il.EmitUnBoxAnyOrCastClass(fieldInfo.FieldType);
}
else
{
il.EmitLdloc(src);
il.EmitFieldGet(fieldInfo);
}
// [dest].Field=
il.EmitFieldSet(fieldInfo);
}
il.EmitLdloc(dest);
il.EmitBox(type);
}
