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;;;-*- Mode:LISP; Package:CHAOS; Base:10; Syntax:Common-lisp -*-
;;;
;;; Copyright (c) 2000-2015, Toshimi Sawada. All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;;
;;; * Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;;
;;; * Redistributions in binary form must reproduce the above
;;; copyright notice, this list of conditions and the following
;;; disclaimer in the documentation and/or other materials
;;; provided with the distribution.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;;
(in-package :chaos)
#|==============================================================================
System: CHAOS
Module: comlib
File: error.lisp
==============================================================================|#
#-:chaos-debug
(declaim (optimize (speed 3) (safety 0) #-GCL (debug 0)))
#+:chaos-debug
(declaim (optimize (speed 1) (safety 3) #-GCL (debug 3)))
;;; *********************
;;; STANDRD ERROR HANDLER
;;; *********************
;;; - catches tag 'chaos-main-error
;;;
;;; << IMPORTANT ASSUMPTION >>
;;; - every chaos AST evaluators report errors by themselves
;;; and then call 'chaos-error with non-nil value.
;;; << SHOULD >>
;;; - users should do anything with-in a body of `with-chaos-error' or
;;; catch 'chaos-main-error by themselves.
;;;
(declaim (special *suppress-err-handler-msg*))
(defvar *suppress-err-handler-msg* nil)
;;; SIGNAL STANDRD ERROR
;;;
(defun chaos-error (err-value)
(flush-all)
(throw 'chaos-main-error err-value))
;;; HANDLER
;;;
(defun chaos-exit-with-error-code (value)
(let ((exit-status 1))
(if (symbolp value)
(format t "~%** Exiting CafeOBJ due to ~s~%" value)
(setq exit-status 2))
#+:sbcl (sb-ext:exit :code exit-status)
#+:allegro (excl:exit exit-status)
#-(or :sbcl :allegro) (bye-bye-bye)
))
(defun get-chaos-error-proc (val)
(if *cafeobj-batch*
'chaos-exit-with-error-code
(if (symbolp val)
(get val ':chaos-error-handler)
nil)))
(defmacro with-chaos-error ((&optional error-proc) &body body)
(if error-proc
`(let ((ret-val nil))
(let ((val (catch 'chaos-main-error
(setq ret-val
(progn ,@body))
nil)))
(if val
(funcall ,error-proc val)
ret-val)))
`(let ((ret-val nil))
(let ((val (catch 'chaos-main-error
(setq ret-val
(progn ,@body))
nil)))
(if val
(let ((std-proc (get-chaos-error-proc val)))
(if std-proc
(funcall std-proc val)
(chaos-to-top)))
ret-val)))))
(defun chaos-indicate-position ()
(unless *suppress-err-handler-msg*
(when *chaos-input-source* ; nil means may be from terminal
(format t "~%filename: ~a" (namestring *chaos-input-source*))
(when (file-position *standard-input*)
(format t " in top-level form ending at character position: ~d"
(file-position *standard-input*)))
(terpri))))
(defun chaos-to-top (&rest ignore)
(declare (ignore ignore))
(fresh-line)
(chaos-indicate-position)
(unless *suppress-err-handler-msg*
(format t "~%** returning to top level~%"))
(throw 'chaos-top-level-error t))
(defmacro with-chaos-top-error ((&optional error-proc) &body body)
(if error-proc
`(let ((ret-val nil))
(let ((val (catch 'chaos-top-level-error
(setq ret-val
(progn ,@body))
nil)))
(if val
(funcall ,error-proc val)
ret-val)))
`(let ((ret-val nil))
(let ((val (catch 'chaos-top-level-error
(setq ret-val
(progn ,@body))
nil)))
(if val
(let ((std-proc (get-chaos-error-proc val)))
(if std-proc
(funcall std-proc val)
;; we assume no more error handlers.
nil))
ret-val)))))
(defmacro ignoring-chaos-error (&body body)
` (catch 'chaos-top-level-error
(catch 'chaos-main-error
,@body)))
;;; EOF
|
