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Add R6RS `syntax-violation' to (rnrs syntax-case).

* module/rnrs/6/exceptions.scm: Remove dependency on (rnrs syntax-case);
  rewrite guard and guard0 in using syntax-rules in terms of syntax-case.
* module/rnrs/6/syntax-case.scm: Add syntax-violation implementation.
This commit is contained in:
Julian Graham 2010-03-28 19:40:16 -04:00
parent 2359a9a49e
commit 0c7398a7dc
2 changed files with 26 additions and 19 deletions

View file

@ -50,6 +50,18 @@
quasisyntax
unsyntax
unsyntax-splicing
unsyntax-splicing)
(ice-9 optargs)
(rnrs base (6))
(rnrs conditions (6))
(rnrs exceptions (6))
(rnrs records procedural (6)))
syntax-violation)))
(define* (syntax-violation who message form #:optional subform)
(let* ((conditions (list (make-message-condition message)
(make-syntax-violation form subform)))
(conditions (if who
(cons (make-who-condition who) conditions)
conditions)))
(raise (apply condition conditions))))
)