Re: [stack] sweetening concatenative syntax

> Scheme makes essentially the same distinction between a procedure (a
> piece of Scheme code), a closure (a run-time object binding a procedure
> to a lexical environment), and a function (a mathematical relation).
> OTOH, the closely related Common Lisp uses "function" for all three.

While the language description makes this distinction, but AFIAK the
run-time semantics of Scheme do not make a distinction between these
kinds of values.
In other words you can't write code (in R5RS) that distinguishes
whether a given value is a closure, a function or a procedure.

- Christopher