>The biggest real problem I’ve found with large “where” clauses is that they tend to have a lot of implicit dependencies on variables from the enclosing scope.

>The biggest real problem I’ve found with large “where” clauses is that they tend to have a lot of implicit dependencies on variables from the enclosing scope. For me it's always a toss up. I like to make things local where possible to give some indication that the definitions need not be looked over with a fine-toothed comb -- they aren't used extensively. On the other hand, it does often lead to implicit dependencies. It would be nice to have scope highlighting - color every identifier based on the distance from the scope it's defined in. This idea shamelessly stolen from Doug Crockford in https://www.youtube.com/watch?v=b0EF0VTs9Dc https://www.youtube.com/watch?v=b0EF0VTs9Dc