416 lines
16 KiB
Scheme
416 lines
16 KiB
Scheme
;;; Ikarus Scheme -- A compiler for R6RS Scheme.
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;;; Copyright (C) 2006,2007,2008 Abdulaziz Ghuloum
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;;;
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;;; This program is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License version 3 as
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;;; published by the Free Software Foundation.
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;;;
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;;; This program is distributed in the hope that it will be useful, but
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;;; 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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;;; General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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(library (ikarus conditions)
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(export condition? simple-conditions condition-predicate
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condition condition-accessor print-condition
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;;; too much junk
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make-message-condition message-condition?
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condition-message make-warning warning?
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make-serious-condition serious-condition? make-error
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error? make-violation violation? make-assertion-violation
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assertion-violation? make-irritants-condition
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irritants-condition? condition-irritants
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make-who-condition who-condition? condition-who
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make-non-continuable-violation non-continuable-violation?
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make-implementation-restriction-violation
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implementation-restriction-violation?
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make-lexical-violation lexical-violation?
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make-syntax-violation syntax-violation?
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syntax-violation-form syntax-violation-subform
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make-undefined-violation undefined-violation?
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make-i/o-error i/o-error? make-i/o-read-error
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i/o-read-error? make-i/o-write-error i/o-write-error?
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make-i/o-invalid-position-error
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i/o-invalid-position-error? i/o-error-position
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make-i/o-filename-error i/o-filename-error?
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i/o-error-filename make-i/o-file-protection-error
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i/o-file-protection-error? make-i/o-file-is-read-only-error
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i/o-file-is-read-only-error?
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make-i/o-file-already-exists-error
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i/o-file-already-exists-error?
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make-i/o-file-does-not-exist-error
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i/o-file-does-not-exist-error? make-i/o-port-error
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i/o-port-error? i/o-error-port make-i/o-decoding-error
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i/o-decoding-error? make-i/o-encoding-error
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i/o-encoding-error? i/o-encoding-error-char
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no-infinities-violation? make-no-infinities-violation
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no-nans-violation? make-no-nans-violation
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interrupted-condition? make-interrupted-condition
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&condition-rtd &condition-rcd &message-rtd &message-rcd
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&warning-rtd &warning-rcd &serious-rtd &serious-rcd
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&error-rtd &error-rcd &violation-rtd &violation-rcd
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&assertion-rtd &assertion-rcd &irritants-rtd
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&irritants-rcd &who-rtd &who-rcd &non-continuable-rtd
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&non-continuable-rcd &implementation-restriction-rtd
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&implementation-restriction-rcd &lexical-rtd &lexical-rcd
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&syntax-rtd &syntax-rcd &undefined-rtd &undefined-rcd
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&i/o-rtd &i/o-rcd &i/o-read-rtd &i/o-read-rcd
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&i/o-write-rtd &i/o-write-rcd &i/o-invalid-position-rtd
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&i/o-invalid-position-rcd &i/o-filename-rtd
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&i/o-filename-rcd &i/o-file-protection-rtd
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&i/o-file-protection-rcd &i/o-file-is-read-only-rtd
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&i/o-file-is-read-only-rcd &i/o-file-already-exists-rtd
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&i/o-file-already-exists-rcd &i/o-file-does-not-exist-rtd
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&i/o-file-does-not-exist-rcd &i/o-port-rtd &i/o-port-rcd
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&i/o-decoding-rtd &i/o-decoding-rcd &i/o-encoding-rtd
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&i/o-encoding-rcd &no-infinities-rtd &no-infinities-rcd
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&no-nans-rtd &no-nans-rcd
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&interrupted-rtd &interrupted-rcd
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&i/o-would-block-rtd
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&i/o-would-block-rcd
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make-i/o-would-block-condition
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i/o-would-block-condition?
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i/o-would-block-port
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)
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(import
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(rnrs records inspection)
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(rnrs records procedural)
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(only (rnrs) record-type-descriptor record-constructor-descriptor record-predicate)
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(only (ikarus records procedural) rtd? rtd-subtype?)
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(except (ikarus) define-condition-type condition? simple-conditions
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condition condition-predicate condition-accessor
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print-condition
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;;; more junk
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&condition &message &warning &serious &error &violation
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&assertion &irritants &who &non-continuable
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&implementation-restriction &lexical &syntax &undefined
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&i/o &i/o-read &i/o-write &i/o-invalid-position
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&i/o-filename &i/o-file-protection &i/o-file-is-read-only
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&i/o-file-already-exists &i/o-file-does-not-exist
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&i/o-port &i/o-decoding &i/o-encoding &no-infinities
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&no-nans
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make-message-condition message-condition?
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condition-message make-warning warning?
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make-serious-condition serious-condition? make-error
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error? make-violation violation? make-assertion-violation
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assertion-violation? make-irritants-condition
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irritants-condition? condition-irritants
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make-who-condition who-condition? condition-who
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make-non-continuable-violation non-continuable-violation?
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make-implementation-restriction-violation
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implementation-restriction-violation?
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make-lexical-violation lexical-violation?
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make-syntax-violation syntax-violation?
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syntax-violation-form syntax-violation-subform
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make-undefined-violation undefined-violation?
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make-i/o-error i/o-error? make-i/o-read-error
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i/o-read-error? make-i/o-write-error i/o-write-error?
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make-i/o-invalid-position-error
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i/o-invalid-position-error? i/o-error-position
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make-i/o-filename-error i/o-filename-error?
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i/o-error-filename make-i/o-file-protection-error
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i/o-file-protection-error? make-i/o-file-is-read-only-error
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i/o-file-is-read-only-error?
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make-i/o-file-already-exists-error
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i/o-file-already-exists-error?
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make-i/o-file-does-not-exist-error
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i/o-file-does-not-exist-error? make-i/o-port-error
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i/o-port-error? i/o-error-port make-i/o-decoding-error
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i/o-decoding-error? make-i/o-encoding-error
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i/o-encoding-error? i/o-encoding-error-char
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no-infinities-violation? make-no-infinities-violation
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no-nans-violation? make-no-nans-violation
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&i/o-would-block
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make-i/o-would-block-condition
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i/o-would-block-condition?
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i/o-would-block-port
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))
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(define-record-type &condition
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(nongenerative))
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(define &condition-rtd (record-type-descriptor &condition))
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(define &condition-rcd (record-constructor-descriptor &condition))
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(define-record-type compound-condition
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(nongenerative)
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(fields (immutable components))
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(sealed #t)
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(opaque #t))
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(define (condition? x)
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(or (&condition? x)
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(compound-condition? x)))
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(define condition
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(case-lambda
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[() (make-compound-condition '())]
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[(x)
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(if (condition? x)
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x
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(die 'condition "not a condition type" x))]
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[x*
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(let ([ls
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(let f ([x* x*])
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(cond
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[(null? x*) '()]
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[(&condition? (car x*))
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(cons (car x*) (f (cdr x*)))]
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[(compound-condition? (car x*))
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(append (simple-conditions (car x*)) (f (cdr x*)))]
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[else (die 'condition "not a condition" (car x*))]))])
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(cond
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[(null? ls) (make-compound-condition '())]
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[(null? (cdr ls)) (car ls)]
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[else (make-compound-condition ls)]))]))
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(define (simple-conditions x)
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(cond
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[(compound-condition? x) (compound-condition-components x)]
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[(&condition? x) (list x)]
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[else (die 'simple-conditions "not a condition" x)]))
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(define (condition-predicate rtd)
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(unless (rtd? rtd)
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(die 'condition-predicate "not a record type descriptor" rtd))
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(unless (rtd-subtype? rtd (record-type-descriptor &condition))
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(die 'condition-predicate "not a descendant of &condition" rtd))
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(let ([p? (record-predicate rtd)])
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(lambda (x)
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(or (p? x)
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(and (compound-condition? x)
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(let f ([ls (compound-condition-components x)])
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(and (pair? ls)
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(or (p? (car ls))
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(f (cdr ls))))))))))
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(define (condition-accessor rtd proc)
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(unless (rtd? rtd)
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(die 'condition-accessor "not a record type descriptor" rtd))
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(unless (procedure? proc)
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(die 'condition-accessor "not a procedure" proc))
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(unless (rtd-subtype? rtd (record-type-descriptor &condition))
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(die 'condition-accessor "not a descendant of &condition" rtd))
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(let ([p? (record-predicate rtd)])
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(lambda (x)
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(cond
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[(p? x) (proc x)]
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[(compound-condition? x)
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(let f ([ls (compound-condition-components x)])
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(cond
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[(pair? ls)
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(if (p? (car ls))
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(proc (car ls))
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(f (cdr ls)))]
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[else
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(die 'condition-accessor "not a condition of correct type" x rtd)]))]
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[else
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(die 'condition-accessor "not a condition of correct type" x rtd)]))))
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(define-syntax define-condition-type
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(lambda (x)
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(define (mkname name suffix)
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(datum->syntax name
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(string->symbol
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(string-append
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(symbol->string (syntax->datum name))
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suffix))))
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(syntax-case x ()
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[(ctxt name super constructor predicate (field* accessor*) ...)
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(and (identifier? #'name)
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(identifier? #'super)
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(identifier? #'constructor)
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(identifier? #'predicate)
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(andmap identifier? #'(field* ...))
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(andmap identifier? #'(accessor* ...)))
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(with-syntax ([(aux-accessor* ...) (generate-temporaries #'(accessor* ...))]
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[rtd (mkname #'name "-rtd")]
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[rcd (mkname #'name "-rcd")])
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#'(begin
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(define-record-type (name constructor p?)
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(parent super)
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(fields (immutable field* aux-accessor*) ...)
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(nongenerative)
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(sealed #f) (opaque #f))
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(define predicate (condition-predicate (record-type-descriptor name)))
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(define accessor* (condition-accessor (record-type-descriptor name) aux-accessor*))
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...
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(define rtd (record-type-descriptor name))
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(define rcd (record-constructor-descriptor name))))])))
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(define-condition-type &message &condition
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make-message-condition message-condition?
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(message condition-message))
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(define-condition-type &warning &condition
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make-warning warning?)
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(define-condition-type &serious &condition
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make-serious-condition serious-condition?)
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(define-condition-type &error &serious
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make-error error?)
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(define-condition-type &violation &serious
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make-violation violation?)
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(define-condition-type &assertion &violation
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make-assertion-violation assertion-violation?)
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(define-condition-type &irritants &condition
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make-irritants-condition irritants-condition?
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(irritants condition-irritants))
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(define-condition-type &who &condition
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make-who-condition who-condition?
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(who condition-who))
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(define-condition-type &non-continuable &violation
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make-non-continuable-violation non-continuable-violation?)
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(define-condition-type &implementation-restriction &violation
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make-implementation-restriction-violation
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implementation-restriction-violation?)
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(define-condition-type &lexical &violation
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make-lexical-violation lexical-violation?)
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(define-condition-type &syntax &violation
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make-syntax-violation syntax-violation?
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(form syntax-violation-form)
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(subform syntax-violation-subform))
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(define-condition-type &undefined &violation
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make-undefined-violation undefined-violation?)
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(define-condition-type &i/o &error
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make-i/o-error i/o-error?)
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(define-condition-type &i/o-read &i/o
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make-i/o-read-error i/o-read-error?)
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(define-condition-type &i/o-write &i/o
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make-i/o-write-error i/o-write-error?)
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(define-condition-type &i/o-invalid-position &i/o
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make-i/o-invalid-position-error i/o-invalid-position-error?
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(position i/o-error-position))
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(define-condition-type &i/o-filename &i/o
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make-i/o-filename-error i/o-filename-error?
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(filename i/o-error-filename))
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(define-condition-type &i/o-file-protection &i/o-filename
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make-i/o-file-protection-error i/o-file-protection-error?)
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(define-condition-type &i/o-file-is-read-only &i/o-file-protection
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make-i/o-file-is-read-only-error i/o-file-is-read-only-error?)
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(define-condition-type &i/o-file-already-exists &i/o-filename
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make-i/o-file-already-exists-error i/o-file-already-exists-error?)
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(define-condition-type &i/o-file-does-not-exist &i/o-filename
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make-i/o-file-does-not-exist-error i/o-file-does-not-exist-error?)
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(define-condition-type &i/o-port &i/o
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make-i/o-port-error i/o-port-error?
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(port i/o-error-port))
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(define-condition-type &i/o-decoding &i/o-port
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make-i/o-decoding-error i/o-decoding-error?)
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(define-condition-type &i/o-encoding &i/o-port
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make-i/o-encoding-error i/o-encoding-error?
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(char i/o-encoding-error-char))
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(define-condition-type &no-infinities &implementation-restriction
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make-no-infinities-violation no-infinities-violation?)
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(define-condition-type &no-nans &implementation-restriction
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make-no-nans-violation no-nans-violation?)
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;;; ikarus-specific conditions
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(define-condition-type &interrupted &serious
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make-interrupted-condition interrupted-condition?)
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(define-condition-type &i/o-would-block &condition
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make-i/o-would-block-condition i/o-would-block-condition?
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(port i/o-would-block-port))
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(define print-condition
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(let ()
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(define (print-simple-condition x p)
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(let* ([rtd (record-rtd x)]
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[rf (let l ([rtd rtd] [accum '()])
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(if rtd
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(l (record-type-parent rtd)
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(cons
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(cons rtd (record-type-field-names rtd))
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accum))
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(remp (lambda (a) (zero? (vector-length (cdr a))))
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accum)))]
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[rf-len (apply + (map vector-length
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(map cdr rf)))])
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(let ([name (record-type-name rtd)])
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(display name p))
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(case rf-len
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[(0) (newline p)]
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[(1)
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(display ": " p)
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(write ((record-accessor (caar rf) 0) x) p)
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(newline p)]
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[else
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(display ":\n" p)
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(for-each
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(lambda (a)
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(let f ([i 0] [rtd (car a)] [v (cdr a)])
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(unless (= i (vector-length v))
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(display " " p)
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(display (vector-ref v i) p)
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(display ": " p)
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(write ((record-accessor rtd i) x) p)
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(newline)
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(f (+ i 1) rtd v))))
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rf)])))
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(define (print-condition x p)
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(cond
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[(condition? x)
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(let ([ls (simple-conditions x)])
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(if (null? ls)
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(display "Condition object with no further information\n" p)
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(begin
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(display " Condition components:\n" p)
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(let f ([ls ls] [i 1])
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(unless (null? ls)
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(display " " p)
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(display i p)
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(display ". " p)
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(print-simple-condition (car ls) p)
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(f (cdr ls) (+ i 1)))))))]
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[else
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(display " Non-condition object: " p)
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(write x p)
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(newline p)]))
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(case-lambda
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[(x)
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(print-condition x (console-output-port))]
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[(x port)
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(if (output-port? port)
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(print-condition x port)
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(die 'print-condition "not an output port" port))])))
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)
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