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;;; -*- Mode: Lisp; Syntax: Common-Lisp; Package: "CONDITIONS"; Base: 10 -*- |
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(in-package "CONDITIONS" :USE '("LISP" #+(and clos (not pcl)) "CLOS" #+pcl "PCL")) |
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#+kcl |
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(eval-when (compile load eval) |
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(when (fboundp 'remove-clcs-symbols) |
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(remove-clcs-symbols)) |
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) |
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;DEFINE-CONDITION |
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;MAKE-CONDITION |
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;condition printing |
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;(define-condition CONDITION ...) |
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;CONDITIONP |
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;CONDITION-CLASS-P |
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;SIMPLE-CONDITION-P |
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;SIMPLE-CONDITION-CLASS-P |
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#-(or clos pcl) |
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(progn |
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(DEFUN CONDITION-PRINT (CONDITION STREAM DEPTH) |
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DEPTH ;ignored |
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(COND (*PRINT-ESCAPE* |
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(FORMAT STREAM "#<~S.~D>" (TYPE-OF CONDITION) (UNIQUE-ID CONDITION))) |
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(T |
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(CONDITION-REPORT CONDITION STREAM)))) |
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(DEFSTRUCT (CONDITION :CONC-NAME |
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(:CONSTRUCTOR |Constructor for CONDITION|) |
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(:PREDICATE NIL) |
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(:PRINT-FUNCTION CONDITION-PRINT)) |
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(-DUMMY-SLOT- NIL)) |
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(EVAL-WHEN (EVAL COMPILE LOAD) |
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(DEFMACRO PARENT-TYPE (CONDITION-TYPE) `(GET ,CONDITION-TYPE 'PARENT-TYPE)) |
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(DEFMACRO SLOTS (CONDITION-TYPE) `(GET ,CONDITION-TYPE 'SLOTS)) |
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(DEFMACRO CONC-NAME (CONDITION-TYPE) `(GET ,CONDITION-TYPE 'CONC-NAME)) |
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(DEFMACRO REPORT-FUNCTION (CONDITION-TYPE) `(GET ,CONDITION-TYPE 'REPORT-FUNCTION)) |
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(DEFMACRO MAKE-FUNCTION (CONDITION-TYPE) `(GET ,CONDITION-TYPE 'MAKE-FUNCTION)) |
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);NEHW-LAVE |
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(DEFUN CONDITION-REPORT (CONDITION STREAM) |
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(DO ((TYPE (TYPE-OF CONDITION) (PARENT-TYPE TYPE))) |
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((NOT TYPE) (FORMAT STREAM "The condition ~A occurred." (TYPE-OF CONDITION))) |
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(LET ((REPORTER (REPORT-FUNCTION TYPE))) |
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(WHEN REPORTER |
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(FUNCALL REPORTER CONDITION STREAM) |
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(RETURN NIL))))) |
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(SETF (MAKE-FUNCTION 'CONDITION) '|Constructor for CONDITION|) |
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(DEFUN MAKE-CONDITION (TYPE &REST SLOT-INITIALIZATIONS) |
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(LET ((FN (MAKE-FUNCTION TYPE))) |
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(COND ((NOT FN) (ERROR 'SIMPLE-TYPE-ERROR |
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:DATUM TYPE |
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:EXPECTED-TYPE '(SATISFIES MAKE-FUNCTION) |
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:FORMAT-STRING "Not a condition type: ~S" |
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:FORMAT-ARGUMENTS (LIST TYPE))) |
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(T (APPLY FN SLOT-INITIALIZATIONS))))) |
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(EVAL-WHEN (EVAL COMPILE LOAD) ;Some utilities that are used at macro expansion time |
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(DEFUN PARSE-NEW-AND-USED-SLOTS (SLOTS PARENT-TYPE) |
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(LET ((NEW '()) (USED '())) |
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(DOLIST (SLOT SLOTS) |
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(IF (SLOT-USED-P (CAR SLOT) PARENT-TYPE) |
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(PUSH SLOT USED) |
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(PUSH SLOT NEW))) |
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(VALUES NEW USED))) |
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(DEFUN SLOT-USED-P (SLOT-NAME TYPE) |
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(COND ((EQ TYPE 'CONDITION) NIL) |
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((NOT TYPE) (ERROR "The type ~S does not inherit from CONDITION." TYPE)) |
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((ASSOC SLOT-NAME (SLOTS TYPE))) |
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(T |
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(SLOT-USED-P SLOT-NAME (PARENT-TYPE TYPE))))) |
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);NEHW-LAVE |
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(DEFMACRO DEFINE-CONDITION (NAME (PARENT-TYPE) SLOT-SPECS &REST OPTIONS) |
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(LET ((CONSTRUCTOR (LET ((*PACKAGE* *THIS-PACKAGE*)) ;Bind for the INTERN -and- the FORMAT |
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(INTERN (FORMAT NIL "Constructor for ~S" NAME))))) |
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(LET ((SLOTS (MAPCAR #'(LAMBDA (SLOT-SPEC) |
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(IF (ATOM SLOT-SPEC) (LIST SLOT-SPEC) SLOT-SPEC)) |
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SLOT-SPECS))) |
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(MULTIPLE-VALUE-BIND (NEW-SLOTS USED-SLOTS) |
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(PARSE-NEW-AND-USED-SLOTS SLOTS PARENT-TYPE) |
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(LET ((CONC-NAME-P NIL) |
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(CONC-NAME NIL) |
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(REPORT-FUNCTION NIL) |
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(DOCUMENTATION NIL)) |
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(DO ((O OPTIONS (CDR O))) |
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((NULL O)) |
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(LET ((OPTION (CAR O))) |
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(CASE (CAR OPTION) ;Should be ECASE |
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(:CONC-NAME (SETQ CONC-NAME-P T) |
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(SETQ CONC-NAME (CADR OPTION))) |
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(:REPORT (SETQ REPORT-FUNCTION (IF (STRINGP (CADR OPTION)) |
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`(LAMBDA (CONDITION STREAM) |
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(DECLARE (IGNORE CONDITION)) |
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(WRITE-STRING ,(CADR OPTION) STREAM)) |
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(CADR OPTION)))) |
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(:DOCUMENTATION (SETQ DOCUMENTATION (CADR OPTION))) |
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(OTHERWISE (CERROR "Ignore this DEFINE-CONDITION option." |
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"Invalid DEFINE-CONDITION option: ~S" OPTION))))) |
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(IF (NOT CONC-NAME-P) (SETQ CONC-NAME (INTERN (FORMAT NIL "~A-" NAME) *PACKAGE*))) |
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;; The following three forms are compile-time side-effects. For now, they affect |
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;; the global environment, but with modified abstractions for PARENT-TYPE, SLOTS, |
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;; and CONC-NAME, the compiler could easily make them local. |
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(SETF (PARENT-TYPE NAME) PARENT-TYPE) |
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(SETF (SLOTS NAME) SLOTS) |
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(SETF (CONC-NAME NAME) CONC-NAME) |
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;; Finally, the expansion ... |
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`(PROGN (DEFSTRUCT (,NAME |
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(:CONSTRUCTOR ,CONSTRUCTOR) |
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(:PREDICATE NIL) |
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(:COPIER NIL) |
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(:PRINT-FUNCTION CONDITION-PRINT) |
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(:INCLUDE ,PARENT-TYPE ,@USED-SLOTS) |
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(:CONC-NAME ,CONC-NAME)) |
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,@NEW-SLOTS) |
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(SETF (DOCUMENTATION ',NAME 'TYPE) ',DOCUMENTATION) |
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(SETF (PARENT-TYPE ',NAME) ',PARENT-TYPE) |
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(SETF (SLOTS ',NAME) ',SLOTS) |
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(SETF (CONC-NAME ',NAME) ',CONC-NAME) |
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(SETF (REPORT-FUNCTION ',NAME) ,(IF REPORT-FUNCTION `#',REPORT-FUNCTION)) |
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(SETF (MAKE-FUNCTION ',NAME) ',CONSTRUCTOR) |
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',NAME)))))) |
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(defun conditionp (object) |
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(typep object 'condition)) |
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(defun condition-class-p (object) |
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(and (symbolp object) |
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(MAKE-FUNCTION object))) |
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) |
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#+(or clos pcl) |
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(progn |
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(eval-when (compile load eval) |
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(defvar *condition-class-list* nil) ; list of (class-name initarg1 type1...) |
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) |
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(DEFMACRO DEFINE-CONDITION (NAME PARENT-LIST SLOT-SPECS &REST OPTIONS) |
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(unless (or parent-list (eq name 'condition)) |
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(setq parent-list (list 'condition))) |
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(let* ((REPORT-FUNCTION nil) |
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(DEFAULT-INITARGS nil) |
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(DOCUMENTATION nil)) |
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(DO ((O OPTIONS (CDR O))) |
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((NULL O)) |
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(LET ((OPTION (CAR O))) |
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(CASE (CAR OPTION) |
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(:REPORT (SETQ REPORT-FUNCTION (IF (STRINGP (CADR OPTION)) |
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`(LAMBDA (CONDITION STREAM) |
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(DECLARE (IGNORE CONDITION)) |
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(WRITE-STRING ,(CADR OPTION) STREAM)) |
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(CADR OPTION)))) |
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(:DEFAULT-INITARGS (SETQ DEFAULT-INITARGS OPTION)) |
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(:DOCUMENTATION (SETQ DOCUMENTATION (CADR OPTION))) |
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(OTHERWISE (CERROR "Ignore this DEFINE-CONDITION option." |
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"Invalid DEFINE-CONDITION option: ~S" OPTION))))) |
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`(progn |
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(eval-when (compile) |
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#+pcl (setq pcl::*defclass-times* '(compile load eval))) |
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,(if default-initargs |
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`(defclass ,name ,parent-list ,slot-specs ,default-initargs) |
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`(defclass ,name ,parent-list ,slot-specs)) |
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(eval-when (compile load eval) |
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(pushnew '(,name ,parent-list |
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,@(mapcan #'(lambda (slot-spec) |
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(let* ((ia (and (consp slot-spec) (getf (cdr slot-spec) ':initarg)))) |
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(when ia |
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(list |
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(cons ia |
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(or (getf (cdr slot-spec) ':type) |
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t)))))) |
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SLOT-SPECS)) |
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*condition-class-list*) |
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#+kcl (setf (get ',name #+akcl 'si::s-data #-akcl 'si::is-a-structure) nil) |
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; (setf (get ',name 'documentation) ',documentation) |
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) |
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,@(when REPORT-FUNCTION |
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`((DEFMETHOD PRINT-OBJECT ((X ,NAME) STREAM) |
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(IF *PRINT-ESCAPE* |
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(CALL-NEXT-METHOD) |
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(,REPORT-FUNCTION X STREAM))))) |
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',NAME))) |
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(eval-when (compile load eval) |
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(define-condition condition () |
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()) |
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#+pcl |
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(when (fboundp 'pcl::proclaim-incompatible-superclasses) |
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(mapc |
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#'pcl::proclaim-incompatible-superclasses |
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'((condition pcl::metaobject)))) |
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) |
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(defun conditionp (object) |
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(typep object 'condition)) |
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(DEFMETHOD PRINT-OBJECT ((X condition) STREAM) |
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(IF *PRINT-ESCAPE* |
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(FORMAT STREAM "#<~S.~D>" (class-name (class-of x)) (UNIQUE-ID x)) |
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(FORMAT STREAM "The condition ~A occurred." (TYPE-OF x)))) |
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(defvar *condition-class* (find-class 'condition)) |
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(defun condition-class-p (TYPE) |
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(when (symbolp TYPE) |
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(setq TYPE (find-class TYPE))) |
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(and (typep TYPE 'standard-class) |
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(member *condition-class* |
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(#+pcl pcl::class-precedence-list |
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#-pcl clos::class-precedence-list |
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type)))) |
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(DEFUN MAKE-CONDITION (TYPE &REST SLOT-INITIALIZATIONS) |
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(unless (condition-class-p TYPE) |
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(ERROR 'SIMPLE-TYPE-ERROR |
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:DATUM TYPE |
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:EXPECTED-TYPE '(SATISFIES condition-class-p) |
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:FORMAT-STRING "Not a condition type: ~S" |
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:FORMAT-ARGUMENTS (LIST TYPE))) |
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(apply #'make-instance TYPE SLOT-INITIALIZATIONS)) |
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) |