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New syntax: (: MODULE-NAME VARIABLE-NAME)
From: |
Marius Vollmer |
Subject: |
New syntax: (: MODULE-NAME VARIABLE-NAME) |
Date: |
Thu, 13 Nov 2003 19:12:01 +0100 |
User-agent: |
Gnus/5.1002 (Gnus v5.10.2) Emacs/21.3 (gnu/linux) |
Hi,
what about making the changes below? The only unclean thing is that
we would need to change the interpretation of a single ':'. The colon
is such a natural choice, but we could avoid that uncleanliness by
using some other symbol. Which one?
** The '-e' option now 'read's its argument.
This is to allow the new '(: MODULE-NAME VARIABLE-NAME)' construct to
be used with '-e'. For example, you can now write a script like
#! /bin/sh
exec guile -e '(: (demo) main)' -s "$0" "$@"
!#
(define-module (demo)
:export (main))
(define (main args)
(format #t "Demo: ~a~%" args))
** A single ':' is always a symbol.
Even with (read-set! keywords 'prefix). If you really want a keyword
of length zero, write '#:'.
** New syntax ':':
You can now directly refer to variables in a module by writing
(: MODULE-NAME VARIABLE-NAME)
For example (: (ice-9 pretty-print) pretty-print) will directly
access the pretty-print variable in the (ice-9 pretty-print) module.
You don't need to 'use' that module first. You can also use ':' with
'set!'.
--
GPG: D5D4E405 - 2F9B BCCC 8527 692A 04E3 331E FAF8 226A D5D4 E405
- New syntax: (: MODULE-NAME VARIABLE-NAME),
Marius Vollmer <=
- Re: New syntax: (: MODULE-NAME VARIABLE-NAME), Neil Jerram, 2003/11/13
- Re: New syntax: (: MODULE-NAME VARIABLE-NAME), Marius Vollmer, 2003/11/13
- Re: New syntax: (: MODULE-NAME VARIABLE-NAME), Neil Jerram, 2003/11/14
- Re: New syntax: (: MODULE-NAME VARIABLE-NAME), Marius Vollmer, 2003/11/15
- Re: New syntax: (: MODULE-NAME VARIABLE-NAME), Neil Jerram, 2003/11/15
- Re: New syntax: (: MODULE-NAME VARIABLE-NAME), Marius Vollmer, 2003/11/16
- Re: New syntax: (: MODULE-NAME VARIABLE-NAME), Neil Jerram, 2003/11/16
- Re: New syntax: (: MODULE-NAME VARIABLE-NAME), Neil Jerram, 2003/11/16
- Re: New syntax: (: MODULE-NAME VARIABLE-NAME), Marius Vollmer, 2003/11/16
- Re: New syntax: (: MODULE-NAME VARIABLE-NAME), Neil Jerram, 2003/11/17