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- ;;; installed-scm-file
-
- ;;;; Copyright (C) 2001 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., 59 Temple Place, Suite 330,
- ;;;; Boston, MA 02111-1307 USA
- ;;;;
- ;;;; As a special exception, the Free Software Foundation gives permission
- ;;;; for additional uses of the text contained in its release of GUILE.
- ;;;;
- ;;;; The exception is that, if you link the GUILE library with other files
- ;;;; to produce an executable, this does not by itself cause the
- ;;;; resulting executable to be covered by the GNU General Public License.
- ;;;; Your use of that executable is in no way restricted on account of
- ;;;; linking the GUILE library code into it.
- ;;;;
- ;;;; This exception does not however invalidate any other reasons why
- ;;;; the executable file might be covered by the GNU General Public License.
- ;;;;
- ;;;; This exception applies only to the code released by the
- ;;;; Free Software Foundation under the name GUILE. If you copy
- ;;;; code from other Free Software Foundation releases into a copy of
- ;;;; GUILE, as the General Public License permits, the exception does
- ;;;; not apply to the code that you add in this way. To avoid misleading
- ;;;; anyone as to the status of such modified files, you must delete
- ;;;; this exception notice from them.
- ;;;;
- ;;;; If you write modifications of your own for GUILE, it is your choice
- ;;;; whether to permit this exception to apply to your modifications.
- ;;;; If you do not wish that, delete this exception notice.
- ;;;;
-
- (define-module (ice-9 stack-catch)
- :export (stack-catch))
-
- (define (stack-catch key thunk handler)
- "Like @code{catch}, invoke @var{thunk} in the dynamic context of
- @var{handler} for exceptions matching @var{key}, but also save the
- current stack state in the @var{the-last-stack} fluid, for the purpose
- of debugging or re-throwing of an error. If thunk throws to the
- symbol @var{key}, then @var{handler} is invoked this way:\n
- @example
- (handler key args ...)
- @end example\n
- @var{key} is a symbol or #t.\n
- @var{thunk} takes no arguments. If @var{thunk} returns normally, that
- is the return value of @code{catch}.\n
- Handler is invoked outside the scope of its own @code{catch}. If
- @var{handler} again throws to the same key, a new handler from further
- up the call chain is invoked.\n
- If the key is @code{#t}, then a throw to @emph{any} symbol will match
- this call to @code{catch}."
- (catch key
- (lambda ()
- (lazy-catch key
- thunk
- lazy-handler-dispatch))
- handler))
-