Re: Redefining functions interactively

[Per Bothner <per at bothner dot com>]

Chris Dean wrote:
> I would like to redefine functions in a specific module when running 
> interactively.   Is this a supported feature?

However, Kawa optimizes functions using the syntax
  (define (f args) ...)
assuming that f is constant.

Instead, you have to define f as a variable:
  (define f (lambda (args) ...))

R5RS defines these to be equivalent, but then R5RS doesn't
define separate compilation.  (Kawa's approach does appear to
be compatible with what Common Lisp specifies.)

> For example, assume I have a module Foo that has two functions: "inner"
> and "outer".  I would like to run kawa interactively, require Foo, and
> then redefine the function "inner" and have "outer" use the new "inner".
>
>     (module-name <Foo>)
>     (module-static #t)
>
>     (define (inner) 'inner)

Replace this line by:
  (define inner (lambda () 'inner))

The late redefinition works as written (as least currently!),
but stylistically I would recommend:
  (set! inner (lambda () 'inner-2))
--
	--Per Bothner
per at bothner dot com   http://per.bothner.com/