Tobias Brandt <tob.bra...@googlemail.com> writes:
> Declaring a R6RS style library doesn't work:
>
> (library (foo))
>
> =>
> ice-9/psyntax.scm:1422:30: In procedure expand-macro:
> ice-9/psyntax.scm:1422:30: Syntax error:
> source expression failed to match any pattern in form (library (foo))
>
>
> while this does:
>
> (define-module (foo))
This is a misunderstanding on your part, I'm afraid. R6RS library forms
are intended to wrap the code[0]; they are not declarations to be placed at
the top. The manual does mention this[1], by noting the syntax for library
is
(library name (export export-spec ...) (import import-spec ...) body ...)
Without an example, I can see how the equivalence mentioned at the top
may be misleading. Perhaps the manual should add an example? Even
something as simple as, say
(library (counters)
(export make-counter)
(import (rnrs base)
(define (make-counter start)
(lambda ()
(let ((val start))
(set! start (+ start 1))
val)))
)
would probably be helpful.
0. http://www.r6rs.org/final/html/r6rs/r6rs-Z-H-10.html
1. http://www.gnu.org/software/guile/manual/html_node/R6RS-Libraries.html
--
Ian Price
"Programming is like pinball. The reward for doing it well is
the opportunity to do it again" - from "The Wizardy Compiled"
