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[Bug-kawa] [bug #40814] R6RS/R7RS ellipsis escapes
From: |
John Tobey |
Subject: |
[Bug-kawa] [bug #40814] R6RS/R7RS ellipsis escapes |
Date: |
Thu, 05 Dec 2013 04:31:08 +0000 |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:20.0) Gecko/20100101 Firefox/20.0 |
URL:
<http://savannah.gnu.org/bugs/?40814>
Summary: R6RS/R7RS ellipsis escapes
Project: Kawa
Submitted by: jtobey
Submitted on: Thu 05 Dec 2013 04:31:07 AM GMT
Category: Scheme language
Severity: 3 - Normal
Item Group: Feature Request
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
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Details:
Could we please have "(... ...)" expand to a literal "..."? This is both R6RS
and R7RS-draft9:
(define-syntax be-like-begin
(syntax-rules ()
((be-like-begin name)
(define-syntax name
(syntax-rules ()
((name expr (... ...))
(begin expr (... ...))))))))
(be-like-begin sequence)
(display (sequence 1 2 3 4)) ; 4
(newline)
It is pretty widely supported, even by earlier Kawa versions if I read
correctly: http://osdir.com/ml/lisp.scheme.kawa/2005-06/msg00039.html
$ racket -f bug.scm
4
$ guile -c '(use-syntax (ice-9 syncase)) (load "bug.scm")'
4
$ sisc -x bug.scm
4
$ kawa bug.scm
bug.scm:3:5: ... follows template with no suitably-nested pattern variable
bug.scm:3:5: ... follows template with no suitably-nested pattern variable
bug.scm:9:10: no matching syntax-rule for sequence
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- [Bug-kawa] [bug #40814] R6RS/R7RS ellipsis escapes,
John Tobey <=