static bool CanAssignArrayElement(Type source, Type target)
{
if (!target.IsValueType && !target.IsPointer)
{
if (!source.IsValueType && !source.IsPointer)
{
// Reference to reference copy
return
(source.IsInterface || target.IsInterface ||
source.IsAssignableFrom(target) || target.IsAssignableFrom(source));
}
else
{
// Value to reference copy
if (source.IsPointer)
{
return(false);
}
return(target.IsAssignableFrom(source));
}
}
else
{
if (source.IsEquivalentTo(target))
{
return(true);
}
else if (source.IsPointer && target.IsPointer)
{
return(true);
}
else if (source.IsPrimitive && target.IsPrimitive)
{
// Special case: normally C# doesn't allow implicit ushort->char cast).
if (source == typeof(ushort) && target == typeof(char))
{
return(true);
}
// Allow primitive type widening
return(DefaultBinder.CanChangePrimitive(source, target));
}
else if (!source.IsValueType && !source.IsPointer)
{
// Source is base class or interface of destination type
if (target.IsPointer)
{
return(false);
}
return(source.IsAssignableFrom(target));
}
}
return(false);
}
static bool CanAssignArrayElement(Type source, Type target)
{
if (!target.IsValueType && !target.IsPointer)
{
if (!source.IsValueType && !source.IsPointer)
{
// Reference to reference copy
return
(source.IsInterface || target.IsInterface ||
source.IsAssignableFrom(target) || target.IsAssignableFrom(source));
}
else
{
// Value to reference copy
if (source.IsPointer)
{
return(false);
}
return(target.IsAssignableFrom(source));
}
}
else
{
if (source.IsEquivalentTo(target))
{
return(true);
}
else if (source.IsPointer && target.IsPointer)
{
return(true);
}
else if (source.IsPrimitive && target.IsPrimitive)
{
// Allow primitive type widening
return(DefaultBinder.CanChangePrimitive(source, target));
}
else if (!source.IsValueType && !source.IsPointer)
{
// Source is base class or interface of destination type
if (target.IsPointer)
{
return(false);
}
return(source.IsAssignableFrom(target));
}
}
return(false);
}