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e10cf6b9c7
* libguile/deprecated.h:
* libguile/deprecated.c (scm_internal_lazy_catch, scm_lazy_catch):
Deprecate, and print out a nasty warning that people should change to
with-throw-handler.
* libguile/throw.h:
* libguile/throw.c (scm_c_with_throw_handler): Deprecate the use of the
lazy_catch_p argument, printing out a nasty warning if someone
actually passes 1 as that argument. The combination of the pre-unwind
and post-unwind handlers should be sufficient.
* test-suite/tests/exceptions.test: Remove lazy-catch tests, as they are
deprecated. Two of them fail:
* throw/catch: effect of lazy-catch unwinding on throw to another key
* throw/catch: repeat of previous test but with lazy-catch
Hopefully people are not depending on this behavior, and the warning is
sufficiently nasty for people to switch. We will see.
* test-suite/tests/eval.test ("promises"): Use with-throw-handler
instead of lazy-catch.
* doc/ref/api-debug.texi:
* doc/ref/api-control.texi: Update to remove references to lazy-catch,
folding in the useful bits to with-throw-handler.
365 lines
8.8 KiB
Scheme
365 lines
8.8 KiB
Scheme
;;;; exceptions.test --- tests for Guile's exception handling -*- scheme -*-
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;;;; Copyright (C) 2001, 2003, 2004, 2006, 2010 Free Software Foundation, Inc.
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;;;;
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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(use-modules (test-suite lib))
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(define-macro (throw-test title result . exprs)
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`(pass-if ,title
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(equal? ,result
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(letrec ((stack '())
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(push (lambda (val)
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(set! stack (cons val stack)))))
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(begin ,@exprs)
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;;(display ,title)
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;;(display ": ")
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;;(write (reverse stack))
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;;(newline)
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(reverse stack)))))
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(with-test-prefix "throw/catch"
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(with-test-prefix "wrong type argument"
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(pass-if-exception "(throw 1)"
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exception:wrong-type-arg
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(throw 1)))
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(with-test-prefix "wrong number of arguments"
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(pass-if-exception "(throw)"
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exception:wrong-num-args
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(throw))
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(pass-if-exception "throw 1 / catch 0"
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exception:wrong-num-args
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(catch 'a
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(lambda () (throw 'a))
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(lambda () #f)))
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(pass-if-exception "throw 2 / catch 1"
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exception:wrong-num-args
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(catch 'a
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(lambda () (throw 'a 2))
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(lambda (x) #f)))
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(pass-if-exception "throw 1 / catch 2"
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exception:wrong-num-args
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(catch 'a
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(lambda () (throw 'a))
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(lambda (x y) #f)))
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(pass-if-exception "throw 3 / catch 2"
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exception:wrong-num-args
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(catch 'a
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(lambda () (throw 'a 2 3))
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(lambda (y x) #f)))
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(pass-if-exception "throw 1 / catch 2+"
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exception:wrong-num-args
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(catch 'a
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(lambda () (throw 'a))
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(lambda (x y . rest) #f))))
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(with-test-prefix "with pre-unwind handler"
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(pass-if "pre-unwind fluid state"
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(equal? '(inner outer arg)
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(let ((fluid-parm (make-fluid))
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(inner-val #f))
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(fluid-set! fluid-parm 'outer)
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(catch 'misc-exc
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(lambda ()
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(with-fluids ((fluid-parm 'inner))
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(throw 'misc-exc 'arg)))
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(lambda (key . args)
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(list inner-val
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(fluid-ref fluid-parm)
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(car args)))
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(lambda (key . args)
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(set! inner-val (fluid-ref fluid-parm))))))))
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(throw-test "normal catch"
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'(1 2)
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(catch 'a
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(lambda ()
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(push 1)
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(throw 'a))
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(lambda (key . args)
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(push 2))))
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(throw-test "catch and with-throw-handler"
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'(1 2 3 4)
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(catch 'a
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(lambda ()
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(push 1)
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(with-throw-handler
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'a
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(lambda ()
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(push 2)
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(throw 'a))
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(lambda (key . args)
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(push 3))))
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(lambda (key . args)
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(push 4))))
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(throw-test "catch with rethrowing throw-handler"
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'(1 2 3 4)
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(catch 'a
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(lambda ()
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(push 1)
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(with-throw-handler
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'a
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(lambda ()
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(push 2)
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(throw 'a))
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(lambda (key . args)
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(push 3)
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(apply throw key args))))
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(lambda (key . args)
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(push 4))))
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(throw-test "catch with pre-unwind handler"
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'(1 3 2)
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(catch 'a
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(lambda ()
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(push 1)
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(throw 'a))
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(lambda (key . args)
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(push 2))
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(lambda (key . args)
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(push 3))))
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(throw-test "catch with rethrowing pre-unwind handler"
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'(1 3 2)
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(catch 'a
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(lambda ()
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(push 1)
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(throw 'a))
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(lambda (key . args)
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(push 2))
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(lambda (key . args)
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(push 3)
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(apply throw key args))))
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(throw-test "catch with throw handler"
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'(1 2 3 4)
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(catch 'a
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(lambda ()
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(push 1)
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(with-throw-handler 'a
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(lambda ()
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(push 2)
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(throw 'a))
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(lambda (key . args)
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(push 3))))
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(lambda (key . args)
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(push 4))))
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(throw-test "catch with rethrowing throw handler"
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'(1 2 3 4)
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(catch 'a
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(lambda ()
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(push 1)
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(with-throw-handler 'a
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(lambda ()
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(push 2)
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(throw 'a))
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(lambda (key . args)
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(push 3)
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(apply throw key args))))
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(lambda (key . args)
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(push 4))))
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(throw-test "effect of with-throw-handler not-unwinding on throw to another key"
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'(1 2 3 5 4 6)
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(catch 'a
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(lambda ()
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(push 1)
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(with-throw-handler 'b
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(lambda ()
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(push 2)
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(catch 'a
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(lambda ()
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(push 3)
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(throw 'b))
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(lambda (key . args)
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(push 4))))
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(lambda (key . args)
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(push 5)
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(throw 'a)))
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(push 6))
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(lambda (key . args)
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(push 7))))
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(throw-test "with-throw-handler chaining"
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'(1 2 3 4 6 8)
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(catch 'a
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(lambda ()
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(push 1)
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(with-throw-handler 'a
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(lambda ()
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(push 2)
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(with-throw-handler 'a
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(lambda ()
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(push 3)
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(throw 'a))
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(lambda (key . args)
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(push 4)))
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(push 5))
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(lambda (key . args)
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(push 6)))
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(push 7))
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(lambda (key . args)
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(push 8))))
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(throw-test "throw handlers throwing to each other recursively"
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'(1 2 3 4 8 6 10 12)
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(catch #t
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(lambda ()
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(push 1)
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(with-throw-handler 'a
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(lambda ()
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(push 2)
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(with-throw-handler 'b
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(lambda ()
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(push 3)
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(with-throw-handler 'c
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(lambda ()
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(push 4)
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(throw 'b)
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(push 5))
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(lambda (key . args)
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(push 6)
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(throw 'a)))
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(push 7))
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(lambda (key . args)
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(push 8)
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(throw 'c)))
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(push 9))
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(lambda (key . args)
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(push 10)
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(throw 'b)))
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(push 11))
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(lambda (key . args)
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(push 12))))
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(throw-test "throw handler throwing to lexically inside catch"
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'(1 2 7 5 4 6 9)
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(with-throw-handler 'a
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(lambda ()
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(push 1)
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(catch 'b
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(lambda ()
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(push 2)
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(throw 'a)
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(push 3))
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(lambda (key . args)
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(push 4))
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(lambda (key . args)
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(push 5)))
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(push 6))
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(lambda (key . args)
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(push 7)
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(throw 'b)
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(push 8)))
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(push 9))
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(throw-test "reuse of same throw handler after lexically inside catch"
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'(0 1 2 7 5 4 6 7 10)
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(catch 'b
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(lambda ()
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(push 0)
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(with-throw-handler 'a
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(lambda ()
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(push 1)
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(catch 'b
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(lambda ()
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(push 2)
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(throw 'a)
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(push 3))
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(lambda (key . args)
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(push 4))
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(lambda (key . args)
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(push 5)))
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(push 6)
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(throw 'a))
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(lambda (key . args)
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(push 7)
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(throw 'b)
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(push 8)))
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(push 9))
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(lambda (key . args)
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(push 10))))
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(throw-test "again but with two chained throw handlers"
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'(0 1 11 2 13 7 5 4 12 13 7 10)
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(catch 'b
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(lambda ()
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(push 0)
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(with-throw-handler 'a
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(lambda ()
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(push 1)
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(with-throw-handler 'a
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(lambda ()
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(push 11)
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(catch 'b
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(lambda ()
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(push 2)
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(throw 'a)
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(push 3))
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(lambda (key . args)
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(push 4))
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(lambda (key . args)
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(push 5)))
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(push 12)
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(throw 'a))
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(lambda (key . args)
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(push 13)))
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(push 6))
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(lambda (key . args)
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(push 7)
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(throw 'b)))
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(push 9))
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(lambda (key . args)
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(push 10))))
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)
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(with-test-prefix "false-if-exception"
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(pass-if (false-if-exception #t))
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(pass-if (not (false-if-exception #f)))
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(pass-if (not (false-if-exception (error "xxx"))))
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;; Not yet working.
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;;
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;; (with-test-prefix "in empty environment"
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;; ;; an environment with no bindings at all
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;; (define empty-environment
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;; (make-module 1))
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;;
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;; (pass-if "#t"
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;; (eval `(,false-if-exception #t)
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;; empty-environment))
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;; (pass-if "#f"
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;; (not (eval `(,false-if-exception #f)
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;; empty-environment)))
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;; (pass-if "exception"
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;; (not (eval `(,false-if-exception (,error "xxx"))
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;; empty-environment))))
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)
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