(define (predicate-dispatcher-rules dispatch)
(map list-copy
- ((get-handler-set dispatch 'predicate-dispatcher-rules) 'get-rules)))
+ (((get-handler-set dispatch 'predicate-dispatcher-rules) 'get-rules))))
(define (get-handler-set dispatch caller)
(metadata-handler-set (get-metadata dispatch caller)))
'define-predicate-dispatch-handler)
(guarantee-procedure-of-arity handler (metadata-arity metadata)
'define-predicate-dispatch-handler)
- ((metadata-handler-set metadata) 'set-handler! predicates handler)))
+ (((metadata-handler-set metadata) 'set-handler!) predicates handler)))
(define (define-predicate-dispatch-default-handler dispatch handler)
- ((get-handler-set dispatch 'define-predicate-dispatch-default-handler)
- 'set-default-handler! handler))
+ (((get-handler-set dispatch 'define-predicate-dispatch-default-handler)
+ 'set-default-handler!)
+ handler))
\f
;;;; Handler set implementations
(else (delegate operator))))))
(define (cached-most-specific-handler-set)
- (make-cached-handler-set (most-specific-handler-set) object->tag))
+ (cached-handler-set (most-specific-handler-set) object->tag))
(define (cached-chaining-handler-set)
- (make-cached-handler-set (chaining-handler-set) object->tag))
\ No newline at end of file
+ (cached-handler-set (chaining-handler-set) object->tag))
\ No newline at end of file
--- /dev/null
+#| -*-Scheme-*-
+
+Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
+ 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+ 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016,
+ 2017 Massachusetts Institute of Technology
+
+This file is part of MIT/GNU Scheme.
+
+MIT/GNU Scheme 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 2 of the License, or (at
+your option) any later version.
+
+MIT/GNU Scheme 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 MIT/GNU Scheme; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
+USA.
+
+|#
+
+;;;; Tests for predicate dispatchers
+
+(declare (usual-integrations))
+
+(define-test 'generic-basic
+ (lambda ()
+ (assert-range-error (lambda () (simple-predicate-dispatcher 'foo 0)))
+
+ (define foo
+ (simple-predicate-dispatcher 'foo 1))
+
+ (define-predicate-dispatch-handler foo (list any-object?)
+ (lambda (arg)
+ 'foobar))
+
+ (assert-equal (foo #f) 'foobar)))
+
+(define-test 'generic-example1
+ (lambda ()
+ (define foo
+ (simple-predicate-dispatcher 'foo 2))
+
+ (define-predicate-dispatch-handler foo (list number? number?)
+ (lambda (a b)
+ (+ a b)))
+
+ (let ((symbolic
+ (lambda (a b)
+ (list '+ a b))))
+ (define-predicate-dispatch-handler foo (list number? symbol?) symbolic)
+ (define-predicate-dispatch-handler foo (list symbol? number?) symbolic)
+ (define-predicate-dispatch-handler foo (list symbol? symbol?) symbolic))
+
+ (assert-equal (foo 1 2) 3)
+ (assert-equal (foo 1 'a) '(+ 1 a))
+ (assert-equal (foo 'a 2) '(+ a 2))
+ (assert-equal (foo 'a 'b) '(+ a b))))
\ No newline at end of file