Import guile-1.8 as multiple upstream tarball component

[lilypond.git] / guile18 / test-suite / tests / dynamic-scope.test

diff --git a/guile18/test-suite/tests/dynamic-scope.test b/guile18/test-suite/tests/dynamic-scope.test
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+;;;;                                                          -*- scheme -*-
+;;;; dynamic-scop.test --- test suite for dynamic scoping constructs
+;;;;
+;;;; Copyright (C) 2001, 2006 Free Software Foundation, Inc.
+;;;; 
+;;;; This program 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, or (at your option)
+;;;; any later version.
+;;;; 
+;;;; This program 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 this software; see the file COPYING.  If not, write to
+;;;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;;;; Boston, MA 02110-1301 USA
+
+(define-module (test-suite test-dynamic-scope)
+  :use-module (test-suite lib))
+
+
+(define exception:missing-expr
+  (cons 'syntax-error "Missing expression"))
+(define exception:bad-binding
+  (cons 'syntax-error "Bad binding"))
+(define exception:duplicate-binding
+  (cons 'syntax-error "Duplicate binding"))
+
+(define global-a 0)
+(define (fetch-global-a) global-a)
+
+(with-test-prefix "dynamic scope"
+
+  (pass-if "@bind binds"
+    (= (@bind ((global-a 1)) (fetch-global-a)) 1))
+
+  (pass-if "@bind unbinds"
+    (begin
+      (set! global-a 0)
+      (@bind ((global-a 1)) (fetch-global-a))
+      (= global-a 0)))
+
+  (pass-if-exception "duplicate @binds"
+    exception:duplicate-binding
+    (eval '(@bind ((a 1) (a 2)) (+ a a))
+         (interaction-environment)))
+
+  (pass-if-exception "@bind missing expression"
+    exception:missing-expr
+    (eval '(@bind ((global-a 1)))
+         (interaction-environment)))
+
+  (pass-if-exception "@bind bad bindings"
+    exception:bad-binding
+    (eval '(@bind (a) #f)
+         (interaction-environment)))
+
+  (pass-if-exception "@bind bad bindings"
+    exception:bad-binding
+    (eval '(@bind ((a)) #f)
+         (interaction-environment)))
+
+  (pass-if "@bind and dynamic-wind"
+    (letrec ((co-routine #f)
+            (spawn (lambda (proc)
+                     (set! co-routine proc)))
+            (yield (lambda (val)
+                     (call-with-current-continuation
+                      (lambda (k)
+                        (let ((next co-routine))
+                          (set! co-routine k)
+                          (next val)))))))
+      
+      (spawn (lambda (val)
+              (@bind ((global-a 'inside))
+                (yield global-a)
+                (yield global-a))))
+
+      (set! global-a 'outside)
+      (let ((inside-a (yield #f)))
+       (let ((outside-a global-a))
+         (let ((inside-a2 (yield #f)))
+           (and (eq? inside-a 'inside)
+                (eq? outside-a 'outside)
+                (eq? inside-a2 'inside))))))))
+
+
+