738 lines
28 KiB
Scheme
738 lines
28 KiB
Scheme
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;;; exceptions.ss
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;;; Copyright 1984-2017 Cisco Systems, Inc.
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;;;
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;;; Licensed under the Apache License, Version 2.0 (the "License");
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;;; you may not use this file except in compliance with the License.
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;;; You may obtain a copy of the License at
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;;;
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;;; http://www.apache.org/licenses/LICENSE-2.0
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;;;
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;;; Unless required by applicable law or agreed to in writing, software
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;;; distributed under the License is distributed on an "AS IS" BASIS,
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;;; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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;;; See the License for the specific language governing permissions and
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;;; limitations under the License.
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#|
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TODO:
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- teach default handler to:
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- squirrel away continuation for debug as &continuation simple condition
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- say something about calling debug (if &continuation is included)
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- teach reset to handle closing of ports, etc., in system error chain
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- wire into existing error-handling mechanisms, or visa versa
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- replace error calls as appropriate with violation calls,
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syntax-violation calls, etc.
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- fix: unbound variables show up as #{b *top*:b}
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(~:s in message is supposed to take care of this but format isn't being called)
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- mats for system violations and errors
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- deal with error? and warning? mats
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|#
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(begin
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(let ()
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(define (warning-only? c)
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(and (warning? c) (not (serious-condition? c))))
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(let ()
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(define $display-condition
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(lambda (c op prefix? use-cache?)
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(module (print-source)
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(include "types.ss")
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(define (print-position op prefix src start?)
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(call-with-values
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(lambda () ((current-locate-source-object-source) src start? use-cache?))
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(case-lambda
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[()
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(let ([sfd (source-sfd src)]
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[fp (if start? (source-bfp src) (source-efp src))])
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(fprintf op "~a~a char ~a of ~a" prefix
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(if (eq? start? 'near) "near" "at")
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fp (source-file-descriptor-name sfd)))]
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[(path line char)
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(fprintf op "~a~a line ~a, char ~a of ~a" prefix
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(if (eq? start? 'near) "near" "at")
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line char path)])))
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(define (print-source op prefix c)
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(cond
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[($src-condition? c)
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(let ([src ($src-condition-src c)])
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(when (source? src)
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(print-position op prefix src ($src-condition-start c))))]
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[(source-condition? c)
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(let ([form (source-condition-form c)])
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(parameterize ([print-level 3] [print-length 6])
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(fprintf op "~a~s" prefix (syntax->datum form)))
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(let-values ([(src start?) ($syntax->src form)])
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(when src (print-position op " " src start?))))]
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[(syntax-violation? c)
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(let ([form (syntax-violation-form c)]
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[subform (syntax-violation-subform c)])
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(parameterize ([print-level 3] [print-length 6])
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(if subform
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(fprintf op "~a~s in ~s" prefix (syntax->datum subform) (syntax->datum form))
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(fprintf op "~a~s" prefix (syntax->datum form))))
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(let-values ([(src start?) ($syntax->src subform)])
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(if src
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(print-position op " " src start?)
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(let-values ([(src start?) ($syntax->src form)])
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(when src (print-position op " " src start?))))))])))
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(cond
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[(and (format-condition? c)
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(guard (ignore [#t #f])
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($report-string #f
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(and prefix? (if (warning-only? c) "warning" "exception"))
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(and (who-condition? c) (condition-who c))
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(condition-message c)
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(condition-irritants c)))) =>
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(lambda (s)
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(display s op)
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(print-source op " " c))]
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[(message-condition? c)
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(let ([irritants (if (irritants-condition? c) (condition-irritants c) '())])
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(case (and (list? irritants) (length irritants))
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[(0)
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($report-string op
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(and prefix? (if (warning-only? c) "warning" "exception"))
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(and (who-condition? c) (condition-who c))
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"~a"
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(list (condition-message c)))]
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[(1)
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($report-string op
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(and prefix? (if (warning-only? c) "warning" "exception"))
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(and (who-condition? c) (condition-who c))
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"~a with irritant ~s"
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(list (condition-message c) (car irritants)))]
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[else
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($report-string op
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(and prefix? (if (warning-only? c) "warning" "exception"))
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(and (who-condition? c) (condition-who c))
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"~a with irritants ~s"
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(list (condition-message c) irritants))]))
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(print-source op " " c)]
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[else
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(fprintf op "Exception occurred")
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(cond
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[(condition? c)
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(print-source op " " c)
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(let ([x* (simple-conditions c)])
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(cond
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[(null? x*)
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(fprintf op " with empty condition\n")]
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[else
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(fprintf op " with condition components:")
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(for-each
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(lambda (x i)
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(let ([rtd (#3%record-rtd x)])
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(define (print-field i)
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(if (csv7:record-field-accessible? rtd i)
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(parameterize ([print-level 3] [print-length 6])
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(fprintf op ": ~s" ((csv7:record-field-accessor rtd i) x)))
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(fprintf op ": (inaccessible)")))
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(fprintf op "\n~3d. ~a" i (csv7:record-type-name (#3%record-rtd x)))
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(if (record-type-opaque? rtd)
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(fprintf op " (opaque)")
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(let ([name* (csv7:record-type-field-names rtd)])
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(if (fx= (length name*) 1)
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(print-field 0)
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(for-each
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(lambda (name i)
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(fprintf op "\n ~s" name)
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(print-field i))
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name* (iota (length name*))))))))
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x* (iota (length x*)))]))]
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[else (parameterize ([print-level 3] [print-length 6])
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(fprintf op " with non-condition value ~s" c))])])))
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(set-who! display-condition
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(case-lambda
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[(c) ($display-condition c (current-output-port) #t #f)]
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[(c op)
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(unless (and (output-port? op) (textual-port? op))
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($oops who "~s is not a textual output port" op))
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($display-condition c op #t #f)]))
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(set! $make-source-oops
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(lambda (who msg expr)
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#`(assertion-violation '#,who
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#,(call-with-string-output-port
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(lambda (p)
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($display-condition (condition
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(make-syntax-violation expr #f)
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(make-message-condition msg))
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p #f #t)))))))
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(set! default-exception-handler
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(lambda (c)
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(let ([cep (console-error-port)])
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(with-exception-handler
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(lambda (c)
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(if (i/o-error? c)
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(begin
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(debug-condition c)
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(if (debug-on-exception) (debug))
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(reset))
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(raise-continuable c)))
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(lambda ()
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; only I/O to cep in handler-protected code---not (debug), not (reset).
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(fresh-line cep)
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(display-condition c cep)
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(newline cep)
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(unless (or (warning-only? c) (debug-on-exception) (= ($cafe) 0) (not (interactive?)))
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(display-string "Type (debug) to enter the debugger.\n" cep))
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(flush-output-port cep))))
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(unless (warning-only? c)
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(debug-condition c)
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(if (debug-on-exception) (debug))
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(reset)))))
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(define debug-on-exception
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(make-parameter #f
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(lambda (x) (and x #t))))
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(define base-exception-handler
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($make-thread-parameter
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default-exception-handler
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(lambda (p)
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(unless (procedure? p) ($oops 'default-exception-handler "~s is not a procedure" p))
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p)))
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(let ()
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(define create-exception-stack
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(lambda (p)
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(let ([ls (list p)])
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(set-cdr! ls ls)
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ls)))
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(define default-handler
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(lambda (x)
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((base-exception-handler) x)))
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(define-threaded handler-stack (create-exception-stack default-handler))
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(let ()
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(define-record-type exception-state
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(nongenerative)
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(opaque #t)
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(sealed #t)
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(fields (immutable stack)))
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(set-who! create-exception-state
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(case-lambda
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[() (make-exception-state (create-exception-stack default-handler))]
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[(p)
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(unless (procedure? p) ($oops who "~s is not a procedure" p))
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(make-exception-state (create-exception-stack p))]))
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(set-who! current-exception-state
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(case-lambda
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[() (make-exception-state handler-stack)]
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[(x)
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(unless (exception-state? x)
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($oops who "~s is not an exception state" x))
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(set! handler-stack (exception-state-stack x))])))
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(set-who! with-exception-handler
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(lambda (handler thunk)
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(unless (procedure? handler) ($oops who "~s is not a procedure" handler))
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(unless (procedure? thunk) ($oops who "~s is not a procedure" thunk))
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(fluid-let ([handler-stack (cons handler handler-stack)])
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(thunk))))
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(set-who! raise
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(lambda (obj)
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(let ([handler (car handler-stack)])
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(fluid-let ([handler-stack (cdr handler-stack)])
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(handler obj)
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(raise (make-non-continuable-violation))))))
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(set-who! raise-continuable
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(lambda (obj)
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(let ([handler (car handler-stack)])
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(fluid-let ([handler-stack (cdr handler-stack)])
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(handler obj)))))
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(set-who! $guard
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(lambda (supply-else? guards body)
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(if supply-else?
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((call/cc
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(lambda (kouter)
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(let ([original-handler-stack handler-stack])
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(with-exception-handler
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(lambda (arg)
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((call/cc
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(lambda (kinner)
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(kouter
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(lambda ()
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(guards arg
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(lambda ()
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(kinner
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(lambda ()
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(fluid-let ([handler-stack original-handler-stack])
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(raise-continuable arg))))))))))))
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(lambda ()
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(call-with-values
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body
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(case-lambda
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[(x) (lambda () x)]
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[vals (lambda () (apply values vals))]))))))))
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((call/cc
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(lambda (k)
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(with-exception-handler
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(lambda (arg) (k (lambda () (guards arg))))
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(lambda ()
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(call-with-values
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body
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(case-lambda
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[(x) (lambda () x)]
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[vals (lambda () (apply values vals))]))))))))))
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)
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(define-syntax guard
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(syntax-rules (else)
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[(_ (var clause ... [else e1 e2 ...]) b1 b2 ...)
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(identifier? #'var)
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($guard #f (lambda (var) (cond clause ... [else e1 e2 ...]))
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(lambda () b1 b2 ...))]
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[(_ (var clause1 clause2 ...) b1 b2 ...)
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(identifier? #'var)
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($guard #t (lambda (var p) (cond clause1 clause2 ... [else (p)]))
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(lambda () b1 b2 ...))]))
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(let ()
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; redefine here to get local predicate
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(define-record-type (&condition $make-simple-condition $simple-condition?)
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(nongenerative #{&condition oyb459ue1fphfx4-a}))
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(define-record-type (compound-condition make-compound-condition compound-condition?)
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(nongenerative)
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(sealed #t)
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(fields (immutable components)))
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(define (check-&condition-subtype! who rtd)
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(unless (record-type-descriptor? rtd)
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($oops who "~s is not a record type descriptor" rtd))
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(unless (let f ([rtd rtd])
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(or (eq? rtd (type-descriptor &condition))
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(let ([rtd (record-type-parent rtd)])
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(and rtd (f rtd)))))
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($oops who "~s does not describe a subtype of &condition" rtd)))
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(record-writer (type-descriptor &condition)
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(lambda (x p wr)
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(fprintf p "#<condition ~a>" (csv7:record-type-name (#3%record-rtd x)))))
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(record-writer (type-descriptor compound-condition)
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(lambda (x p wr)
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(fprintf p "#<compound condition>")))
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(set-who! $compound-condition? compound-condition?)
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(set-who! $compound-condition-components compound-condition-components)
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(set-who! condition
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(case-lambda
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[(x)
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(unless (or ($simple-condition? x) (compound-condition? x))
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($oops who "~s is not a condition" x))
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x]
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[x*
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(let ([ls (fold-right
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(lambda (x ls)
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(cond
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[($simple-condition? x) (cons x ls)]
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[(compound-condition? x) (append (compound-condition-components x) ls)]
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[else ($oops who "~s is not a condition" x)]))
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||
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'()
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x*)])
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(if (fx= (length ls) 1)
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(car ls)
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(make-compound-condition ls)))]))
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||
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(set-who! simple-conditions
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(lambda (x)
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|
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(cond
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||
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[($simple-condition? x) (list x)]
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||
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[(compound-condition? x) (compound-condition-components x)]
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[else ($oops who "~s is not a condition" x)])))
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|
|
(set! condition?
|
||
|
|
(lambda (x)
|
||
|
|
(or ($simple-condition? x) (compound-condition? x))))
|
||
|
|
|
||
|
|
(set-who! condition-predicate
|
||
|
|
(lambda (rtd)
|
||
|
|
(check-&condition-subtype! who rtd)
|
||
|
|
(let ([p? (lambda (x) (record? x rtd))])
|
||
|
|
(lambda (x)
|
||
|
|
(or (p? x)
|
||
|
|
(and (compound-condition? x)
|
||
|
|
(ormap p? (compound-condition-components x))))))))
|
||
|
|
|
||
|
|
(set-who! condition-accessor
|
||
|
|
(lambda (rtd proc)
|
||
|
|
(define accessor-error
|
||
|
|
(lambda (x rtd)
|
||
|
|
($oops 'generated-condition-accessor
|
||
|
|
"~s is not a condition of the type represented by ~s"
|
||
|
|
x rtd)))
|
||
|
|
(check-&condition-subtype! who rtd)
|
||
|
|
(rec generated-condition-accessor
|
||
|
|
(lambda (x)
|
||
|
|
(cond
|
||
|
|
[(record? x rtd) (proc x)]
|
||
|
|
[(compound-condition? x)
|
||
|
|
(let f ([ls (compound-condition-components x)])
|
||
|
|
(if (null? ls)
|
||
|
|
(accessor-error x rtd)
|
||
|
|
(let ([x (car ls)])
|
||
|
|
(if (record? x rtd)
|
||
|
|
(proc x)
|
||
|
|
(f (cdr ls))))))]
|
||
|
|
[else (accessor-error x rtd)]))))))
|
||
|
|
|
||
|
|
(define-syntax define-condition-type
|
||
|
|
(lambda (x)
|
||
|
|
(syntax-case x ()
|
||
|
|
[(_ type-name super-type constructor predicate? (field-name accessor) ...)
|
||
|
|
(with-syntax ([($accessor ...) (generate-temporaries #'(accessor ...))]
|
||
|
|
[msg (format "~~s is not a condition of type ~a" (datum type-name))])
|
||
|
|
#'(begin
|
||
|
|
(define-record-type (type-name constructor $predicate?)
|
||
|
|
(nongenerative)
|
||
|
|
(parent super-type)
|
||
|
|
(fields (immutable field-name $accessor) ...))
|
||
|
|
(define predicate?
|
||
|
|
(lambda (x)
|
||
|
|
(or ($predicate? x)
|
||
|
|
(and ($compound-condition? x)
|
||
|
|
(ormap $predicate? ($compound-condition-components x))))))
|
||
|
|
(define accessor
|
||
|
|
(lambda (x)
|
||
|
|
(define accessor-error (lambda (x) ($oops 'accessor msg x)))
|
||
|
|
(cond
|
||
|
|
[($predicate? x) ($accessor x)]
|
||
|
|
[($compound-condition? x)
|
||
|
|
(let f ([ls ($compound-condition-components x)])
|
||
|
|
(if (null? ls)
|
||
|
|
(accessor-error x)
|
||
|
|
(let ([x (car ls)])
|
||
|
|
(if ($predicate? x)
|
||
|
|
($accessor x)
|
||
|
|
(f (cdr ls))))))]
|
||
|
|
[else (accessor-error x)])))
|
||
|
|
...))])))
|
||
|
|
|
||
|
|
(eval-when (compile)
|
||
|
|
(define-syntax define-system-condition-type
|
||
|
|
(lambda (x)
|
||
|
|
(syntax-case x ()
|
||
|
|
[(_ type-name super-type uid constructor predicate? (field-name accessor) ...)
|
||
|
|
(with-syntax ([($accessor ...) (generate-temporaries #'(accessor ...))]
|
||
|
|
[msg (format "~~s is not a condition of type ~a" (datum type-name))])
|
||
|
|
#'(begin
|
||
|
|
(define-record-type (type-name constructor $predicate?)
|
||
|
|
(nongenerative uid)
|
||
|
|
(parent super-type)
|
||
|
|
(fields (immutable field-name $accessor) ...))
|
||
|
|
(define predicate?
|
||
|
|
(lambda (x)
|
||
|
|
(or ($predicate? x)
|
||
|
|
(and ($compound-condition? x)
|
||
|
|
(ormap $predicate? ($compound-condition-components x))))))
|
||
|
|
(define accessor
|
||
|
|
(lambda (x)
|
||
|
|
(define accessor-error (lambda (x) ($oops 'accessor msg x)))
|
||
|
|
(cond
|
||
|
|
[($predicate? x) ($accessor x)]
|
||
|
|
[($compound-condition? x)
|
||
|
|
(let f ([ls ($compound-condition-components x)])
|
||
|
|
(if (null? ls)
|
||
|
|
(accessor-error x)
|
||
|
|
(let ([x (car ls)])
|
||
|
|
(if ($predicate? x)
|
||
|
|
($accessor x)
|
||
|
|
(f (cdr ls))))))]
|
||
|
|
[else (accessor-error x)])))
|
||
|
|
...))])))
|
||
|
|
)
|
||
|
|
|
||
|
|
;;; standard condition types
|
||
|
|
|
||
|
|
;;; taking advantage of body-like semantics of begin to arrange for each
|
||
|
|
;;; condition type's compile-time information to be available for use in
|
||
|
|
;;; defining its child types, even though the system is compiled with
|
||
|
|
;;; (eval-syntax-expanders-when) not including compile.
|
||
|
|
(begin
|
||
|
|
(let-syntax ([a (syntax-rules ()
|
||
|
|
[(_ &condition) ; leave only &condition visible
|
||
|
|
(define-record-type (&condition make-simple-condition simple-condition?)
|
||
|
|
(nongenerative #{&condition oyb459ue1fphfx4-a}))])])
|
||
|
|
(a &condition))
|
||
|
|
|
||
|
|
(define-system-condition-type &message &condition #{&message bwptyckgidgnsihx-a}
|
||
|
|
make-message-condition message-condition?
|
||
|
|
(message condition-message))
|
||
|
|
|
||
|
|
(define-system-condition-type &warning &condition #{&warning bwtai41dgaww3fus-a}
|
||
|
|
make-warning warning?)
|
||
|
|
|
||
|
|
(define-system-condition-type &serious &condition #{&serious bwvzuvr26s58u3l9-a}
|
||
|
|
make-serious-condition serious-condition?)
|
||
|
|
|
||
|
|
(define-system-condition-type &error &serious #{&error bwyo6misxbfkmrdg-a}
|
||
|
|
make-error error?)
|
||
|
|
|
||
|
|
(define-system-condition-type &violation &serious #{&violation bw1eic9intowee4m-a}
|
||
|
|
make-violation violation?)
|
||
|
|
|
||
|
|
(define-system-condition-type &assertion &violation #{&assertion bw33t3z8ebx752vs-a}
|
||
|
|
make-assertion-violation assertion-violation?)
|
||
|
|
|
||
|
|
(define-system-condition-type &irritants &condition #{&irritants bw6s5uqx4t7jxqmy-a}
|
||
|
|
make-irritants-condition irritants-condition?
|
||
|
|
(irritants condition-irritants))
|
||
|
|
|
||
|
|
(define-system-condition-type &who &condition #{&who bw9ihlhnvcgvped6-a}
|
||
|
|
make-who-condition who-condition?
|
||
|
|
(who condition-who))
|
||
|
|
|
||
|
|
(define-system-condition-type &non-continuable &violation #{&non-continuable bxb7tb8dlup7g15e-a}
|
||
|
|
make-non-continuable-violation
|
||
|
|
non-continuable-violation?)
|
||
|
|
|
||
|
|
(define-system-condition-type &implementation-restriction &violation #{&implementation-restriction bxew42y3cczi8pwl-a}
|
||
|
|
make-implementation-restriction-violation
|
||
|
|
implementation-restriction-violation?)
|
||
|
|
|
||
|
|
(define-system-condition-type &lexical &violation #{&lexical bxhmgtps2u8u0dns-a}
|
||
|
|
make-lexical-violation lexical-violation?)
|
||
|
|
|
||
|
|
(define-system-condition-type &syntax &violation #{&syntax bxkbskgitdh6r1ey-a}
|
||
|
|
make-syntax-violation syntax-violation?
|
||
|
|
(form syntax-violation-form)
|
||
|
|
(subform syntax-violation-subform))
|
||
|
|
|
||
|
|
(define-system-condition-type &undefined &violation #{&undefined bxm04a68jvrijo54-a}
|
||
|
|
make-undefined-violation undefined-violation?)
|
||
|
|
|
||
|
|
;;; io conditions
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o &error #{&i/o bxpqf1xyad0ubcxc-a}
|
||
|
|
make-i/o-error i/o-error?)
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-read &i/o #{&i/o-read bxsfrson0v9520oj-a}
|
||
|
|
make-i/o-read-error i/o-read-error?)
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-write &i/o #{&i/o-write bxu43jfdrejhuofp-a}
|
||
|
|
make-i/o-write-error i/o-write-error?)
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-invalid-position &i/o #{&i/o-invalid-position bxxue953hwstmb6v-a}
|
||
|
|
make-i/o-invalid-position-error
|
||
|
|
i/o-invalid-position-error?
|
||
|
|
(position i/o-error-position))
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-filename &i/o #{&i/o-filename bx0jq0ws8e15dzx4-a}
|
||
|
|
make-i/o-filename-error i/o-filename-error?
|
||
|
|
(filename i/o-error-filename))
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-file-protection &i/o-filename #{&i/o-file-protection bx282rniyxbg5npc-a}
|
||
|
|
make-i/o-file-protection-error
|
||
|
|
i/o-file-protection-error?)
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-file-is-read-only &i/o-file-protection #{&i/o-file-is-read-only bx5yeid8pfksxbgj-a}
|
||
|
|
make-i/o-file-is-read-only-error
|
||
|
|
i/o-file-is-read-only-error?)
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-file-already-exists &i/o-filename #{&i/o-file-already-exists bx8np84yfxt4oy7q-a}
|
||
|
|
make-i/o-file-already-exists-error
|
||
|
|
i/o-file-already-exists-error?)
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-file-does-not-exist &i/o-filename #{&i/o-file-does-not-exist bybc1zvn6f3ggmyw-a}
|
||
|
|
make-i/o-file-does-not-exist-error
|
||
|
|
i/o-file-does-not-exist-error?)
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-port &i/o #{&i/o-port byd2dqmdwycr8ap5-a}
|
||
|
|
make-i/o-port-error i/o-port-error?
|
||
|
|
(pobj i/o-error-port))
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-decoding &i/o-port #{&i/o-decoding bygrphc3ngl3zyhc-a}
|
||
|
|
make-i/o-decoding-error i/o-decoding-error?)
|
||
|
|
|
||
|
|
(define-system-condition-type &i/o-encoding &i/o-port #{&i/o-encoding byjg073tdyvfrl8i-a}
|
||
|
|
make-i/o-encoding-error i/o-encoding-error?
|
||
|
|
(cobj i/o-encoding-error-char))
|
||
|
|
|
||
|
|
;;; arithmetic conditions
|
||
|
|
|
||
|
|
(define-system-condition-type &no-infinities &implementation-restriction #{&no-infinities byl6cyui4g4ri9zq-a}
|
||
|
|
make-no-infinities-violation
|
||
|
|
no-infinities-violation?)
|
||
|
|
|
||
|
|
(define-system-condition-type &no-nans &implementation-restriction #{&no-nans byovopk8uzd3axqx-a}
|
||
|
|
make-no-nans-violation no-nans-violation?)
|
||
|
|
|
||
|
|
;;; Chez Scheme conditions
|
||
|
|
|
||
|
|
(define-system-condition-type &source &condition #{&source byrk0gbylhne2lh4-a}
|
||
|
|
make-source-condition source-condition?
|
||
|
|
(form source-condition-form))
|
||
|
|
|
||
|
|
(define-system-condition-type $&src &condition #{$&src byul0m8re6e47nnb-a}
|
||
|
|
$make-src-condition $src-condition?
|
||
|
|
(src $src-condition-src)
|
||
|
|
(start $src-condition-start))
|
||
|
|
|
||
|
|
(define-system-condition-type &format &condition #{&format byxbcdzg5oogzbei-a}
|
||
|
|
make-format-condition format-condition?)
|
||
|
|
|
||
|
|
(define-system-condition-type &continuation &condition #{&continuation dxr8vukkubd1tr8-a}
|
||
|
|
make-continuation-condition continuation-condition?
|
||
|
|
(k condition-continuation))
|
||
|
|
|
||
|
|
(define-system-condition-type $&recompile &error #{&recompile eb5ipy47b8hscnlzoga59k-0}
|
||
|
|
$make-recompile-condition $recompile-condition?
|
||
|
|
(importer-path $recompile-importer-path))
|
||
|
|
)
|
||
|
|
|
||
|
|
(let ()
|
||
|
|
(define avcond (make-assertion-violation))
|
||
|
|
(define econd (make-error))
|
||
|
|
(define wcond (make-warning))
|
||
|
|
(define fcond (make-format-condition))
|
||
|
|
(define favcond (condition avcond fcond))
|
||
|
|
(define fecond (condition econd fcond))
|
||
|
|
(define fwcond (condition wcond fcond))
|
||
|
|
(define ircond (make-implementation-restriction-violation))
|
||
|
|
(define fimpcond (condition ircond fcond))
|
||
|
|
(define flexcond (condition (make-lexical-violation) (make-i/o-read-error) fcond))
|
||
|
|
(define flexcond/ir (condition ircond (make-lexical-violation) (make-i/o-read-error) fcond))
|
||
|
|
|
||
|
|
(define (error-help warning? who whoarg message irritants basecond)
|
||
|
|
(unless (or (eq? whoarg #f) (string? whoarg) (symbol? whoarg))
|
||
|
|
($oops who "invalid who argument ~s (message = ~s, irritants = ~s)" whoarg message irritants))
|
||
|
|
(unless (string? message)
|
||
|
|
($oops who "invalid message argument ~s (who = ~s, irritants = ~s)" message whoarg irritants))
|
||
|
|
(let ([c (if whoarg
|
||
|
|
(if irritants
|
||
|
|
(condition basecond
|
||
|
|
(make-who-condition whoarg)
|
||
|
|
(make-message-condition message)
|
||
|
|
(make-irritants-condition irritants))
|
||
|
|
(condition basecond
|
||
|
|
(make-who-condition whoarg)
|
||
|
|
(make-message-condition message)))
|
||
|
|
(if irritants
|
||
|
|
(condition basecond
|
||
|
|
(make-message-condition message)
|
||
|
|
(make-irritants-condition irritants))
|
||
|
|
(condition basecond
|
||
|
|
(make-message-condition message))))])
|
||
|
|
(if warning?
|
||
|
|
(raise-continuable c)
|
||
|
|
(call/cc
|
||
|
|
(lambda (k)
|
||
|
|
(raise (condition c (make-continuation-condition k))))))))
|
||
|
|
|
||
|
|
(set-who! assertion-violation
|
||
|
|
(lambda (whoarg message . irritants)
|
||
|
|
(error-help #f who whoarg message irritants avcond)))
|
||
|
|
|
||
|
|
(set-who! assertion-violationf
|
||
|
|
(lambda (whoarg message . irritants)
|
||
|
|
(error-help #f who whoarg message irritants favcond)))
|
||
|
|
|
||
|
|
(set-who! $oops
|
||
|
|
(lambda (whoarg message . irritants)
|
||
|
|
(error-help #f who whoarg message irritants favcond)))
|
||
|
|
|
||
|
|
(set-who! $oops/c
|
||
|
|
(lambda (whoarg basecond message . irritants)
|
||
|
|
(error-help #f who whoarg message irritants
|
||
|
|
(condition basecond fcond))))
|
||
|
|
|
||
|
|
(set-who! $impoops
|
||
|
|
(lambda (whoarg message . irritants)
|
||
|
|
(error-help #f who whoarg message irritants fimpcond)))
|
||
|
|
|
||
|
|
(set-who! $record-oops
|
||
|
|
(lambda (whoarg nonrec rtd)
|
||
|
|
(unless (record-type-descriptor? rtd)
|
||
|
|
($oops who "~s is not a record-type descriptor" rtd))
|
||
|
|
(when (record? nonrec rtd)
|
||
|
|
($oops who "~s actually is of type ~s" nonrec rtd))
|
||
|
|
(error-help #f who whoarg "~s is not of type ~s" (list nonrec rtd) favcond)))
|
||
|
|
|
||
|
|
(set-who! error
|
||
|
|
(lambda (whoarg message . irritants)
|
||
|
|
(error-help #f who whoarg message irritants econd)))
|
||
|
|
|
||
|
|
(set-who! errorf
|
||
|
|
(lambda (whoarg message . irritants)
|
||
|
|
(error-help #f who whoarg message irritants fecond)))
|
||
|
|
|
||
|
|
(set-who! warning
|
||
|
|
(lambda (whoarg message . irritants)
|
||
|
|
(error-help #t who whoarg message irritants wcond)))
|
||
|
|
|
||
|
|
(set-who! warningf
|
||
|
|
(lambda (whoarg message . irritants)
|
||
|
|
(error-help #t who whoarg message irritants fwcond)))
|
||
|
|
|
||
|
|
(let ()
|
||
|
|
(define (infer-who form)
|
||
|
|
(syntax-case form ()
|
||
|
|
[id (identifier? #'id) (datum id)]
|
||
|
|
[(id . stuff) (identifier? #'id) (datum id)]
|
||
|
|
[_ #f]))
|
||
|
|
(set-who! syntax-violation
|
||
|
|
(case-lambda
|
||
|
|
[(whoarg message form)
|
||
|
|
(error-help #f who (or whoarg (infer-who form)) message #f
|
||
|
|
(condition avcond (make-syntax-violation form #f)))]
|
||
|
|
[(whoarg message form subform)
|
||
|
|
(error-help #f who (or whoarg (infer-who form)) message #f
|
||
|
|
(make-syntax-violation form subform))])))
|
||
|
|
|
||
|
|
(set-who! syntax-error
|
||
|
|
(lambda (form . messages)
|
||
|
|
(for-each
|
||
|
|
(lambda (m) (unless (string? m) ($oops who "~s is not a string" m)))
|
||
|
|
messages)
|
||
|
|
(error-help #f who #f
|
||
|
|
(if (null? messages) "invalid syntax" (apply string-append messages))
|
||
|
|
#f (make-syntax-violation form #f))))
|
||
|
|
|
||
|
|
(set-who! $undefined-violation
|
||
|
|
(lambda (id message)
|
||
|
|
(error-help #f who #f message #f
|
||
|
|
(condition (make-undefined-violation) (make-syntax-violation id #f)))))
|
||
|
|
|
||
|
|
(set-who! $lexical-error
|
||
|
|
(case-lambda
|
||
|
|
[(whoarg msg args port ir?)
|
||
|
|
(error-help #f who whoarg msg args
|
||
|
|
(condition
|
||
|
|
(make-i/o-port-error port)
|
||
|
|
(if ir? flexcond/ir flexcond)))]
|
||
|
|
[(whoarg msg args port src start? ir?)
|
||
|
|
(error-help #f who whoarg msg args
|
||
|
|
(condition
|
||
|
|
(make-i/o-port-error port)
|
||
|
|
(if ir? flexcond/ir flexcond)
|
||
|
|
($make-src-condition src start?)))]))
|
||
|
|
|
||
|
|
(set-who! $source-violation
|
||
|
|
(lambda (whoarg src start? msg . args)
|
||
|
|
(error-help #f who whoarg msg args
|
||
|
|
(if src
|
||
|
|
(condition favcond ($make-src-condition src start?))
|
||
|
|
favcond))))
|
||
|
|
|
||
|
|
(set-who! $source-warning
|
||
|
|
(lambda (whoarg src start? msg . args)
|
||
|
|
(error-help #t who whoarg msg args
|
||
|
|
(if src
|
||
|
|
(condition fwcond ($make-src-condition src start?))
|
||
|
|
fwcond))))
|
||
|
|
)
|
||
|
|
)
|