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9f0e9918f4
* module/ice-9/boot-9.scm (default-pre-unwind-handler): Rename from default-lazy-handler. (pre-unwind-handler-dispatch): Rename from lazy-hadler-dispatch. (error-catching-loop): Adjust caller. * module/system/repl/repl.scm (default-pre-unwind-handler): Remove this definition, in favor of the default one in boot-9. (default-catch-handler): Don't do a vm-backtrace, as we will soon be relying on core machinery to do that for us. (call-with-backtrace): Start a new stack for the thunk. (with-backtrace): Macro version of call-with-backtrace. (start-repl): Use with-backtrace for brevity. Start a stack with #t as the tag instead of repl-eval, because all traces of repl-eval are gone after it does a tail-call. * module/ice-9/debugger.scm: * module/ice-9/debugging/traps.scm: * module/ice-9/stack-catch.scm: Adapt to s/lazy/pre-unwind/ in boot-9.scm.
43 lines
1.8 KiB
Scheme
43 lines
1.8 KiB
Scheme
;;; installed-scm-file
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;;;; Copyright (C) 2001, 2006 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 2.1 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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;;;;
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(define-module (ice-9 stack-catch)
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:export (stack-catch))
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(define (stack-catch key thunk handler)
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"Like @code{catch}, invoke @var{thunk} in the dynamic context of
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@var{handler} for exceptions matching @var{key}, but also save the
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current stack state in the @var{the-last-stack} fluid, for the purpose
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of debugging or re-throwing of an error. If thunk throws to the
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symbol @var{key}, then @var{handler} is invoked this way:\n
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@example
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(handler key args ...)
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@end example\n
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@var{key} is a symbol or #t.\n
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@var{thunk} takes no arguments. If @var{thunk} returns normally, that
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is the return value of @code{catch}.\n
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Handler is invoked outside the scope of its own @code{catch}. If
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@var{handler} again throws to the same key, a new handler from further
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up the call chain is invoked.\n
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If the key is @code{#t}, then a throw to @emph{any} symbol will match
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this call to @code{catch}."
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(catch key
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thunk
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handler
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pre-unwind-handler-dispatch))
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