artemist/mes
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Minimal syntactic exception support.

Browse source 
* module/mes/catch.mes: New file.
* tests/catch.test: New file.
* GNUmakefile (TEST): Add it.
This commit is contained in:
Jan Nieuwenhuizen 2016-12-17 22:21:46 +01:00
parent 4744b315c9
commit a8b16ba013
3 changed files with 91 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
GNUmakefile
View file

@ -61,6 +61,7 @@ TESTS:=\
tests/cwv.test\
tests/optargs.test\
tests/fluids.test\
tests/catch.test\
tests/psyntax.test\
tests/let-syntax.test\
tests/record.test\

43
module/mes/catch.mes Normal file
View file

@ -0,0 +1,43 @@
;;; -*-scheme-*-
;;; Mes --- Maxwell Equations of Software
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of Mes.
;;;
;;; Mes is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; Mes is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with Mes. If not, see <http://www.gnu.org/licenses/>.
(mes-use-module (mes let))
(define (make-exception key . args)
(cons* '*exception* key args))
(define (exception? o)
(and (pair? o) (eq? (car o) '*exception*)))
(define (exception-key o)
(if (exception? o) (cadr o)))
(define (exception-args o)
(if (exception? o) (cddr o)))
(define (catch key thunk handler)
(let ((result (thunk)))
(if (and (exception? result)
(or (eq? key (exception-key result))
(eq? key #t)))
(handler (exception-key result) (exception-args result))
result)))
(define throw make-exception)

47
tests/catch.test Executable file
View file

@ -0,0 +1,47 @@
#! /bin/sh
# -*-scheme-*-
echo ' ()' | cat $(dirname $0)/../module/mes/base-0.mes $0 /dev/stdin | $(dirname $0)/../scripts/mes $MES_FLAGS "$@"
#paredit:||
exit $?
!#
;;; -*-scheme-*-
;;; Mes --- Maxwell Equations of Software
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of Mes.
;;;
;;; Mes is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; Mes is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with Mes. If not, see <http://www.gnu.org/licenses/>.
(mes-use-module (mes catch))
(mes-use-module (mes test))
(pass-if "first dummy" #t)
(pass-if-not "second dummy" #f)
(when (not guile?)
(pass-if "throw"
(exception? (make-exception #t))))
(pass-if "catch"
(catch #t
(lambda ()
(throw #t)
;;#f
)
(lambda (key . args)
#t)))
(result 'report)