Immutability 'with' about ecsharp

[qwertie]

The grammar of C# isn't friendly to allowing people to define new operators, particularly words. For example, if we wanted to add a with operator, we'd run into ambiguity since a<b> with (x: y) is already a valid expression in C#. (EDIT: EC# does have a backquote operator though, so you could write a<b> with (x: y) ) Also, since LeMP is a lexical macro processor, macros can't make decisions based on the types involved, which may be a problem.

That said, I already solved this problem from another angle. If you use the new ADT macro in LeMP, you get immutable types with free "With" functions to make changes easily.