Comment by Quarrelsome

1 day ago

> so the use cases are plentiful

such as?

> This should reduce the proliferation of verbose class hierarchies in C#

So just as an alternative for class hierarchies? I mean good people already balance that by having a preference for composition.

5 comments

Quarrelsome

Simple example:

   type Expr =
       | Primitive of int
       | Addition of (Expr * Expr)
       | Subtraction of (Expr * Expr)
       | Negation of Expr

Quarrelsome 1 day ago
Isn't that just Func<int> ?
- afdbcreid 21 hours ago
  
  Really not. You can, of course, having instead a delegate to evaluate the expression. But then that's all you can do. You can't pretty-print it, for example, or optimize it, or whatever.

“Compoision”. A typo I know but it would be a word describing what goes wrong with class hierarchies.