public CloneDel <T> Create <T>()
{
var type = typeof(T);
if (type.IsArray &&
type.GetArrayRank() == 1 &&
type.HasElementType)
{
var elementType = type.GetElementType();
if (elementType.CanShallowClone())
{
var args = CloneArgs.Create(type, true);
var assign = Expression.Assign(
args.Target,
Expression.NewArrayBounds(elementType, Expression.Property(args.Source, "Length")));
var copy = Expression.Call(
args.Source,
_arrayCopy,
args.Target,
Expression.Constant(0));
args.CloneExpression = Expression.Block(
assign,
ExpressionHelper.RecordCopy(args.Context, args.Source, args.Target),
copy);
return(ExpressionHelper.Get <T>(args).Compile());
}
}
return(null);
}
public CloneDel <T> Create <T>()
{
var type = typeof(T);
if (type.IsGenericType() &&
type.GetGenericTypeDefinition() == typeof(List <>) &&
type.GetGenericArguments()[0].CanShallowClone())
{
var args = CloneArgs.Create(type, true);
ConstructorInfo constructor = args
.Type
.GetConstructors()
.Where(x =>
x.GetParameters().Length == 1 &&
x.GetParameters().ElementAt(0).ParameterType.IsGenericType())
.FirstOrDefault();
args.CloneExpression = Expression.Block(
Expression.Assign(args.Target, Expression.New(constructor, args.Source)),
ExpressionHelper.RecordCopy(args.Context, args.Source, args.Target));
return(ExpressionHelper.Get <T>(args).Compile());
}
return(null);
}
public CloneDel <T> Create <T>()
{
var type = typeof(T);
if (type.IsGenericType() &&
(type.GetGenericTypeDefinition() == typeof(Tuple <>) ||
type.GetGenericTypeDefinition() == typeof(Tuple <,>) ||
type.GetGenericTypeDefinition() == typeof(Tuple <, ,>) ||
type.GetGenericTypeDefinition() == typeof(Tuple <, , ,>) ||
type.GetGenericTypeDefinition() == typeof(Tuple <, , , ,>) ||
type.GetGenericTypeDefinition() == typeof(Tuple <, , , , ,>) ||
type.GetGenericTypeDefinition() == typeof(Tuple <, , , , , ,>) ||
type.GetGenericTypeDefinition() == typeof(Tuple <, , , , , , ,>)))
{
var args = CloneArgs.Create(type, true);
Type[] genericTypes = typeof(T).GetGenericArguments();
var cloneItems = new Expression[genericTypes.Length];
// Can't loop to 8, because instead of Item8 the last one is called Rest
var loopCount = Math.Min(genericTypes.Length, 7);
for (int i = 0; i < loopCount; i++)
{
string itemName = "Item" + (i + 1).ToString(CultureInfo.InvariantCulture);
var itemType = genericTypes[i];
cloneItems[i] = itemType.CanShallowClone() ?
Expression.Property(args.Source, itemName) :
(Expression)ExpressionHelper.GetSafeClone(itemType, Expression.Property(args.Source, itemName), args.Context);
}
// add Rest expression if it's necessary
if (genericTypes.Length == 8)
{
string itemName = "Rest";
var itemType = genericTypes[7];
cloneItems[7] = itemType.CanShallowClone() ?
Expression.Property(args.Source, itemName) :
(Expression)ExpressionHelper.GetSafeClone(itemType, Expression.Property(args.Source, itemName), args.Context);
}
ConstructorInfo constructor = args.Type.GetConstructors()[0];
var newExpression = Expression.New(constructor, cloneItems);
args.CloneExpression = Expression.Block(
Expression.Assign(args.Target, newExpression),
ExpressionHelper.RecordCopy(args.Context, args.Source, args.Target));
return(ExpressionHelper.Get <T>(args).Compile());
}
return(null);
}
public CloneDel <T> Create <T>()
{
var type = typeof(T);
if (type.CanShallowClone())
{
var args = CloneArgs.Create(type, false);
args.CloneExpression = Expression.Assign(args.Target, args.Source);
return(ExpressionHelper.Get <T>(args).Compile());
}
return(null);
}
public CloneDel <T> Create <T>()
{
var type = typeof(T);
if (type.IsNullable())
{
var structType = typeof(T).GetGenericArguments()[0];
if (structType.CanShallowClone())
{
var args = CloneArgs.Create(type, false);
args.CloneExpression = Expression.Assign(args.Target, args.Source);
return(ExpressionHelper.Get <T>(args).Compile());
}
}
return(null);
}
public CloneDel <T> Create <T>()
{
var type = typeof(T);
if (type.IsNullable())
{
var structType = typeof(T).GetGenericArguments()[0];
if (!structType.CanShallowClone())
{
var args = CloneArgs.Create(type, false);
var sourceProperty = Expression.Property(args.Source, "Value");
var cloneCall = ExpressionHelper.GetUnSafeClone(structType, sourceProperty, args.Context);
var newNullable = Expression.New(typeof(T).GetConstructor(new[] { structType }), cloneCall);
args.CloneExpression = Expression.Assign(args.Target, newNullable);
return(ExpressionHelper.Get <T>(args).Compile());
}
}
return(null);
}
public CloneDel <T> Create <T>()
{
var type = typeof(T);
if (type.IsClass() &&
!type.IsArray &&
!type.IsAnonymous())
{
if (type.HasDefaultConstructor() ||
CloneConfig <T> .Initializer != null)
{
var args = CloneArgs.Create(type, true);
Expression createExpression = CloneConfig <T> .Initializer != null?
Expression.Invoke(Expression.Constant(CloneConfig <T> .Initializer), args.Source) :
(Expression)Expression.New(args.Type);
List <Expression> expressions = new List <Expression>()
{
Expression.Assign(args.Target, createExpression),
ExpressionHelper.RecordCopy(args.Context, args.Source, args.Target),
ExpressionHelper.GetMemberAssignments <T>(args.Source, args.Target, args.Context),
ExpressionHelper.GetCollectionAssignment <T>(args.Source, args.Target, args.Context)
};
args.CloneExpression = Expression.Block(expressions.Where(x => x != null));
return(ExpressionHelper.Get <T>(args).Compile());
}
else
{
return((source, context) =>
{
throw new ArgumentException($"({type}) has no default constructor or registered initializer.");
});
}
}
return(null);
}
public CloneDel <T> Create <T>()
{
var type = typeof(T);
if (type.IsGenericType() &&
type.GetGenericTypeDefinition() == typeof(KeyValuePair <,>))
{
var args = CloneArgs.Create(type, false);
var keyType = args.Type.GetGenericArguments()[0];
var valueType = args.Type.GetGenericArguments()[1];
ConstructorInfo _constructor = args
.Type
.GetConstructors()
.Where(x => x.GetParameters().Length == 2)
.FirstOrDefault();
Expression cloneKey = keyType.CanShallowClone() ?
Expression.Property(args.Source, "Key") :
(Expression)ExpressionHelper.GetSafeClone(keyType, Expression.Property(args.Source, "Key"), args.Context);
Expression cloneValue = valueType.CanShallowClone() ?
Expression.Property(args.Source, "Value") :
(Expression)ExpressionHelper.GetSafeClone(valueType, Expression.Property(args.Source, "Value"), args.Context);
var newExpression = Expression.New(
_constructor,
cloneKey,
cloneValue);
args.CloneExpression = Expression.Assign(args.Target, newExpression);
return(ExpressionHelper.Get <T>(args).Compile());
}
return(null);
}
