Question

Is there any way in C# to be able to do this:

map.player.x = 5;

while keeping player of type Point (or silently convertible to one) and still be able to check the value for correctness when doing the assignment?

To be clearer:

• Point is a struct defined by the C#/.net standard libraries and is passed by value.
• Making a wrapper class and implementing all of Point‘s methods as call-throughs to Point is long and tedious.
• Having a wrapper class with nothing but an implicit coversion to/from Point will not allow the above. It would have to be written as (Point)(map.player).x, which is clumsy.

Answer 1

If I understand you right, you seem to want to get some flexibility by defining type-conversions. That won’t go very far.

Avoid mutable structs (value types). struct Point is an unfortunate leftover from the old Win32 API.

So aim for map.player = new Point(5, map.player.y);