module/rnrs/syntax-case.scm

   1 ;;; syntax-case.scm --- R6RS support for `syntax-case' macros
   2
   3 ;;      Copyright (C) 2010 Free Software Foundation, Inc.
   4 ;;
   5 ;; This library is free software; you can redistribute it and/or
   6 ;; modify it under the terms of the GNU Lesser General Public
   7 ;; License as published by the Free Software Foundation; either
   8 ;; version 3 of the License, or (at your option) any later version.
   9 ;;
  10 ;; This library is distributed in the hope that it will be useful,
  11 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 ;; Lesser General Public License for more details.
  14 ;;
  15 ;; You should have received a copy of the GNU Lesser General Public
  16 ;; License along with this library; if not, write to the Free Software
  17 ;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18 \f
  19
  20 (library (rnrs syntax-case (6))
  21   (export make-variable-transformer
  22           syntax-case
  23           syntax
  24
  25           identifier?
  26           bound-identifier=?
  27           free-identifier=?
  28
  29           syntax->datum
  30           datum->syntax
  31           generate-temporaries
  32           with-syntax
  33
  34           quasisyntax
  35           unsyntax
  36           unsyntax-splicing
  37
  38           syntax-violation)
  39   (import (only (guile) make-variable-transformer
  40                         syntax-case
  41                         syntax
  42
  43                         identifier?
  44                         bound-identifier=?
  45                         free-identifier=?
  46
  47                         syntax->datum
  48                         datum->syntax
  49                         generate-temporaries
  50                         with-syntax
  51
  52                         quasisyntax
  53                         unsyntax
  54                         unsyntax-splicing)
  55           (ice-9 optargs)
  56           (rnrs base (6))
  57           (rnrs conditions (6))
  58           (rnrs exceptions (6))
  59           (rnrs records procedural (6)))
  60
  61   (define* (syntax-violation who message form #:optional subform)
  62     (let* ((conditions (list (make-message-condition message)
  63                              (make-syntax-violation form subform)))
  64            (conditions (if who
  65                            (cons (make-who-condition who) conditions)
  66                            conditions)))
  67       (raise (apply condition conditions))))
  68 )