X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fdefstruct.lisp;h=fba213aecc2b3cfc66f16221b7c3c851ca9ba067;hb=3120740c3569735b00123b94b61679f56e253ea6;hp=2cd30d7ee7b6bcf04fffa073518e158131e33fad;hpb=31f072311935e32751508ecf824905c6b58a1d95;p=sbcl.git diff --git a/src/code/defstruct.lisp b/src/code/defstruct.lisp index 2cd30d7..fba213a 100644 --- a/src/code/defstruct.lisp +++ b/src/code/defstruct.lisp @@ -26,6 +26,46 @@ (error "Class is not a structure class: ~S" name)) (t res)))) +(defun compiler-layout-ready-p (name) + (let ((layout (info :type :compiler-layout name))) + (and layout (typep (layout-info layout) 'defstruct-description)))) + +(sb!xc:defmacro %make-structure-instance-macro (dd slot-specs &rest slot-vars) + `(truly-the ,(dd-name dd) + ,(if (compiler-layout-ready-p (dd-name dd)) + `(%make-structure-instance ,dd ,slot-specs ,@slot-vars) + ;; Non-toplevel defstructs don't have a layout at compile time, + ;; so we need to construct the actual function at runtime -- but + ;; we cache it at the call site, so that we don't perform quite + ;; so horribly. + `(let* ((cell (load-time-value (list nil))) + (fun (car cell))) + (if (functionp fun) + (funcall fun ,@slot-vars) + (funcall (setf (car cell) + (%make-structure-instance-allocator ,dd ,slot-specs)) + ,@slot-vars)))))) + +(declaim (ftype (sfunction (defstruct-description list) function) + %make-structure-instance-allocator)) +(defun %make-structure-instance-allocator (dd slot-specs) + (let ((vars (make-gensym-list (length slot-specs)))) + (values (compile nil `(lambda (,@vars) + (%make-structure-instance-macro ,dd ',slot-specs ,@vars)))))) + +(defun %make-funcallable-structure-instance-allocator (dd slot-specs) + (when slot-specs + (bug "funcallable-structure-instance allocation with slots unimplemented")) + (let ((name (dd-name dd)) + (length (dd-length dd)) + (nobject (gensym "OBJECT"))) + (values + (compile nil `(lambda () + (let ((,nobject (%make-funcallable-instance ,length))) + (setf (%funcallable-instance-layout ,nobject) + (%delayed-get-compiler-layout ,name)) + ,nobject)))))) + ;;; Delay looking for compiler-layout until the constructor is being ;;; compiled, since it doesn't exist until after the EVAL-WHEN ;;; (COMPILE) stuff is compiled. (Or, in the oddball case when @@ -58,10 +98,6 @@ (error "Class is not a structure class: ~S" ',name)) ,layout)))))) -;;; Get layout right away. -(sb!xc:defmacro compile-time-find-layout (name) - (find-layout name)) - ;;; re. %DELAYED-GET-COMPILER-LAYOUT and COMPILE-TIME-FIND-LAYOUT, above.. ;;; ;;; FIXME: Perhaps both should be defined with DEFMACRO-MUNDANELY? @@ -227,6 +263,7 @@ (raw-type (missing-arg) :type (or symbol cons) :read-only t) ;; What operator is used to access a slot of this type? (accessor-name (missing-arg) :type symbol :read-only t) + (init-vop (missing-arg) :type symbol :read-only t) ;; How many words are each value of this type? (n-words (missing-arg) :type (and index (integer 1)) :read-only t) ;; Necessary alignment in units of words. Note that instances @@ -235,9 +272,6 @@ (alignment 1 :type (integer 1 2) :read-only t)) (defvar *raw-slot-data-list* - #!+hppa - nil - #!-hppa (let ((double-float-alignment ;; white list of architectures that can load unaligned doubles: #!+(or x86 x86-64 ppc) 1 @@ -246,9 +280,11 @@ (list (make-raw-slot-data :raw-type 'sb!vm:word :accessor-name '%raw-instance-ref/word + :init-vop 'sb!vm::raw-instance-init/word :n-words 1) (make-raw-slot-data :raw-type 'single-float :accessor-name '%raw-instance-ref/single + :init-vop 'sb!vm::raw-instance-init/single ;; KLUDGE: On 64 bit architectures, we ;; could pack two SINGLE-FLOATs into the ;; same word if raw slots were indexed @@ -262,23 +298,33 @@ :n-words 1) (make-raw-slot-data :raw-type 'double-float :accessor-name '%raw-instance-ref/double + :init-vop 'sb!vm::raw-instance-init/double :alignment double-float-alignment :n-words (/ 8 sb!vm:n-word-bytes)) (make-raw-slot-data :raw-type 'complex-single-float :accessor-name '%raw-instance-ref/complex-single + :init-vop 'sb!vm::raw-instance-init/complex-single :n-words (/ 8 sb!vm:n-word-bytes)) (make-raw-slot-data :raw-type 'complex-double-float :accessor-name '%raw-instance-ref/complex-double + :init-vop 'sb!vm::raw-instance-init/complex-double :alignment double-float-alignment :n-words (/ 16 sb!vm:n-word-bytes)) #!+long-float (make-raw-slot-data :raw-type long-float :accessor-name '%raw-instance-ref/long + :init-vop 'sb!vm::raw-instance-init/long :n-words #!+x86 3 #!+sparc 4) #!+long-float (make-raw-slot-data :raw-type complex-long-float :accessor-name '%raw-instance-ref/complex-long + :init-vop 'sb!vm::raw-instance-init/complex-long :n-words #!+x86 6 #!+sparc 8))))) +(defun raw-slot-words (type) + (let ((rsd (find type *raw-slot-data-list* :key #'raw-slot-data-raw-type))) + (if rsd + (raw-slot-data-n-words rsd) + (error "Invalid raw slot type: ~S" type)))) ;;;; the legendary DEFSTRUCT macro itself (both CL:DEFSTRUCT and its ;;;; close personal friend SB!XC:DEFSTRUCT) @@ -295,8 +341,8 @@ (declare (notinline find-classoid)) ,@(let ((pf (dd-print-function defstruct)) (po (dd-print-object defstruct)) - (x (gensym)) - (s (gensym))) + (x (sb!xc:gensym "OBJECT")) + (s (sb!xc:gensym "STREAM"))) ;; Giving empty :PRINT-OBJECT or :PRINT-FUNCTION options ;; leaves PO or PF equal to NIL. The user-level effect is ;; to generate a PRINT-OBJECT method specialized for the type, @@ -333,7 +379,8 @@ `((setf (structure-classoid-constructor (find-classoid ',name)) #',def-con)))))))) -;;; shared logic for CL:DEFSTRUCT and SB!XC:DEFSTRUCT +;;; shared logic for host macroexpansion for SB!XC:DEFSTRUCT and +;;; cross-compiler macroexpansion for CL:DEFSTRUCT (defmacro !expander-for-defstruct (name-and-options slot-descriptions expanding-into-code-for-xc-host-p) @@ -383,7 +430,10 @@ (append (typed-accessor-definitions dd) (typed-predicate-definitions dd) (typed-copier-definitions dd) - (constructor-definitions dd))) + (constructor-definitions dd) + (when (dd-doc dd) + `((setf (fdocumentation ',(dd-name dd) 'structure) + ',(dd-doc dd)))))) ',name))))) (sb!xc:defmacro defstruct (name-and-options &rest slot-descriptions) @@ -475,7 +525,8 @@ (let ((inherited (accessor-inherited-data name defstruct))) (cond ((not inherited) - (stuff `(declaim (inline ,name (setf ,name)))) + (stuff `(declaim (inline ,name ,@(unless (dsd-read-only slot) + `((setf ,name)))))) ;; FIXME: The arguments in the next two DEFUNs should ;; be gensyms. (Otherwise e.g. if NEW-VALUE happened to ;; be the name of a special variable, things could get @@ -564,11 +615,14 @@ (defun parse-defstruct-name-and-options (name-and-options) (destructuring-bind (name &rest options) name-and-options (aver name) ; A null name doesn't seem to make sense here. - (let ((dd (make-defstruct-description name))) + (let ((dd (make-defstruct-description name)) + (predicate-named-p nil)) (dolist (option options) (cond ((eq option :named) (setf (dd-named dd) t)) ((consp option) + (when (and (eq (car option) :predicate) (second option)) + (setf predicate-named-p t)) (parse-1-dd-option option dd)) ((member option '(:conc-name :constructor :copier :predicate)) (parse-1-dd-option (list option) dd)) @@ -588,6 +642,9 @@ ;; make that messy, alas.) (incf (dd-length dd)))) (t + ;; In case we are here, :TYPE is specified. + (when (and predicate-named-p (not (dd-named dd))) + (error ":PREDICATE cannot be used with :TYPE unless :NAMED is also specified.")) (require-no-print-options-so-far dd) (when (dd-named dd) (incf (dd-length dd))) @@ -681,7 +738,8 @@ ;;x#-sb-xc-host ;;x(when (and (fboundp accessor-name) ;;x (not (accessor-inherited-data accessor-name defstruct))) - ;;x (style-warn "redefining ~S in DEFSTRUCT" accessor-name))) + ;;x (style-warn "redefining ~/sb-impl::print-symbol-with-prefix/ ~ + ;; in DEFSTRUCT" accessor-name))) ;; which was done until sbcl-0.8.11.18 or so, is wrong: it causes ;; a warning at MACROEXPAND time, when instead the warning should ;; occur not just because the code was constructed, but because it @@ -871,13 +929,13 @@ (unless (eq (classoid-layout classoid) layout) (register-layout layout))) (t + (%redefine-defstruct classoid old-layout layout) (let ((old-dd (layout-info old-layout))) (when (defstruct-description-p old-dd) (dolist (slot (dd-slots old-dd)) (fmakunbound (dsd-accessor-name slot)) (unless (dsd-read-only slot) (fmakunbound `(setf ,(dsd-accessor-name slot))))))) - (%redefine-defstruct classoid old-layout layout) (setq layout (classoid-layout classoid)))) (setf (find-classoid (dd-name dd)) classoid) @@ -929,9 +987,54 @@ ;;; Return a LAMBDA form which can be used to set a slot. (defun slot-setter-lambda-form (dd dsd) - `(lambda (new-value instance) - ,(funcall (nth-value 1 (slot-accessor-transforms dd dsd)) - '(dummy new-value instance)))) + ;; KLUDGE: Evaluating the results of SLOT-ACCESSOR-TRANSFORMS needs + ;; a lexenv. + (let ((sb!c:*lexenv* (if (boundp 'sb!c:*lexenv*) + sb!c:*lexenv* + (sb!c::make-null-lexenv)))) + `(lambda (new-value instance) + ,(funcall (nth-value 1 (slot-accessor-transforms dd dsd)) + '(dummy new-value instance))))) + +;;; Blow away all the compiler info for the structure CLASS. Iterate +;;; over this type, clearing the compiler structure type info, and +;;; undefining all the associated functions. If SUBCLASSES-P, also do +;;; the same for subclasses. FIXME: maybe rename UNDEFINE-FUN-NAME to +;;; UNDECLARE-FUNCTION-NAME? +(defun undeclare-structure (classoid subclasses-p) + (let ((info (layout-info (classoid-layout classoid)))) + (when (defstruct-description-p info) + (let ((type (dd-name info))) + (remhash type *typecheckfuns*) + (setf (info :type :compiler-layout type) nil) + (undefine-fun-name (dd-copier-name info)) + (undefine-fun-name (dd-predicate-name info)) + (dolist (slot (dd-slots info)) + (let ((fun (dsd-accessor-name slot))) + (unless (accessor-inherited-data fun info) + (undefine-fun-name fun) + (unless (dsd-read-only slot) + (undefine-fun-name `(setf ,fun))))))) + ;; Clear out the SPECIFIER-TYPE cache so that subsequent + ;; references are unknown types. + (values-specifier-type-cache-clear))) + (when subclasses-p + (let ((subclasses (classoid-subclasses classoid))) + (when subclasses + (collect ((subs)) + (dohash ((classoid layout) + subclasses + :locked t) + (declare (ignore layout)) + (undeclare-structure classoid nil) + (subs (classoid-proper-name classoid))) + ;; Is it really necessary to warn about + ;; undeclaring functions for subclasses? + (when (subs) + (warn "undeclaring functions for old subclasses ~ + of ~S:~% ~S" + (classoid-name classoid) + (subs)))))))) ;;; core compile-time setup of any class with a LAYOUT, used even by ;;; !DEFSTRUCT-WITH-ALTERNATE-METACLASS weirdosities @@ -954,22 +1057,21 @@ (info :type :compiler-layout (dd-name dd)) (ensure-structure-class dd inherits - (if clayout-p "previously compiled" "current") - "compiled" + (if clayout-p + "The most recently compiled" + "The current") + "the most recently loaded" :compiler-layout clayout)) (cond (old-layout - (undefine-structure (layout-classoid old-layout)) - (when (and (classoid-subclasses classoid) - (not (eq layout old-layout))) - (collect ((subs)) - (dohash (classoid layout (classoid-subclasses classoid)) - (declare (ignore layout)) - (undefine-structure classoid) - (subs (classoid-proper-name classoid))) - (when (subs) - (warn "removing old subclasses of ~S:~% ~S" - (classoid-name classoid) - (subs)))))) + (undeclare-structure (layout-classoid old-layout) + (and (classoid-subclasses classoid) + (not (eq layout old-layout)))) + (setf (layout-invalid layout) nil) + ;; FIXME: it might be polite to hold onto old-layout and + ;; restore it at the end of the file. -- RMK 2008-09-19 + ;; (International Talk Like a Pirate Day). + (warn "~@" + classoid)) (t (unless (eq (classoid-layout classoid) layout) (register-layout layout :invalidate nil)) @@ -1025,6 +1127,7 @@ (let* ((accessor-name (dsd-accessor-name dsd)) (dsd-type (dsd-type dsd))) (when accessor-name + (setf (info :function :structure-accessor accessor-name) dd) (let ((inherited (accessor-inherited-data accessor-name dd))) (cond ((not inherited) @@ -1134,6 +1237,22 @@ :destruct-layout old-layout)))) (values)) +(declaim (inline dd-layout-length)) +(defun dd-layout-length (dd) + (+ (dd-length dd) (dd-raw-length dd))) + +(declaim (ftype (sfunction (defstruct-description) index) dd-instance-length)) +(defun dd-instance-length (dd) + ;; Make sure the object ends at a two-word boundary. Note that this does + ;; not affect the amount of memory used, since the allocator would add the + ;; same padding anyway. However, raw slots are indexed from the length of + ;; the object as indicated in the header, so the pad word needs to be + ;; included in that length to guarantee proper alignment of raw double float + ;; slots, necessary for (at least) the SPARC backend. + (let ((layout-length (dd-layout-length dd))) + (declare (type index layout-length)) + (+ layout-length (mod (1+ layout-length) 2)))) + ;;; This is called when we are about to define a structure class. It ;;; returns a (possibly new) class object and the layout which should ;;; be used for the new definition (may be the current layout, and @@ -1155,7 +1274,7 @@ (lambda (x) (sb!xc:typep x 'structure-classoid)) (lambda (x) - (sb!xc:typep x (find-classoid class)))) + (sb!xc:typep x (classoid-name (find-classoid class))))) (fdefinition constructor))) (setf (classoid-direct-superclasses class) (case (dd-name info) @@ -1171,8 +1290,7 @@ (let ((new-layout (make-layout :classoid class :inherits inherits :depthoid (length inherits) - :length (+ (dd-length info) - (dd-raw-length info)) + :length (dd-layout-length info) :n-untagged-slots (dd-raw-length info) :info info)) (old-layout (or compiler-layout old-layout))) @@ -1211,28 +1329,6 @@ (error "shouldn't happen! strange thing in LAYOUT-INFO:~% ~S" old-layout) (values class new-layout old-layout))))))))) - -;;; Blow away all the compiler info for the structure CLASS. Iterate -;;; over this type, clearing the compiler structure type info, and -;;; undefining all the associated functions. -(defun undefine-structure (class) - (let ((info (layout-info (classoid-layout class)))) - (when (defstruct-description-p info) - (let ((type (dd-name info))) - (remhash type *typecheckfuns*) - (setf (info :type :compiler-layout type) nil) - (undefine-fun-name (dd-copier-name info)) - (undefine-fun-name (dd-predicate-name info)) - (dolist (slot (dd-slots info)) - (let ((fun (dsd-accessor-name slot))) - (unless (accessor-inherited-data fun info) - (undefine-fun-name fun) - (unless (dsd-read-only slot) - (undefine-fun-name `(setf ,fun))))))) - ;; Clear out the SPECIFIER-TYPE cache so that subsequent - ;; references are unknown types. - (values-specifier-type-cache-clear))) - (values)) ;;; Return a list of pairs (name . index). Used for :TYPE'd ;;; constructors to find all the names that we have to splice in & @@ -1296,29 +1392,60 @@ (loop for dsd in (dd-slots dd) and val in values do (setf (elt vals (dsd-index dsd)) (if (eq val '.do-not-initialize-slot.) 0 val))) - `(defun ,cons-name ,arglist (declare ,@(mapcar (lambda (var type) `(type ,type ,var)) vars types)) (list ,@vals)))) (defun create-structure-constructor (dd cons-name arglist vars types values) - (let* ((instance (gensym "INSTANCE"))) + ;; The difference between the two implementations here is that on all + ;; platforms we don't have the appropriate RAW-INSTANCE-INIT VOPS, which + ;; must be able to deal with immediate values as well -- unlike + ;; RAW-INSTANCE-SET VOPs, which never end up seeing immediate values. With + ;; some additional cleverness we might manage without them and just a single + ;; implementation here, though -- figure out a way to ensure that on those + ;; platforms we always still get a non-immediate TN in every case... + ;; + ;; Until someone does that, this means that instances with raw slots can be + ;; DX allocated only on platforms with those additional VOPs. + #!+raw-instance-init-vops + (let* ((slot-values nil) + (slot-specs + (mapcan (lambda (dsd value) + (unless (eq value '.do-not-initialize-slot.) + (push value slot-values) + (list (list* :slot (dsd-raw-type dsd) (dsd-index dsd))))) + (dd-slots dd) + values))) `(defun ,cons-name ,arglist - (declare ,@(mapcar (lambda (var type) `(type ,type ,var)) - vars types)) - (let ((,instance (truly-the ,(dd-name dd) - (%make-instance-with-layout - (%delayed-get-compiler-layout ,(dd-name dd)))))) - ,@(mapcar (lambda (dsd value) - ;; (Note that we can't in general use the - ;; ordinary named slot setter function here - ;; because the slot might be :READ-ONLY, so we - ;; whip up new LAMBDA representations of slot - ;; setters for the occasion.) - (unless (eq value '.do-not-initialize-slot.) - `(,(slot-setter-lambda-form dd dsd) ,value ,instance))) - (dd-slots dd) - values) - ,instance)))) + (declare ,@(mapcar (lambda (var type) `(type ,type ,var)) vars types)) + (%make-structure-instance-macro ,dd ',slot-specs ,@(reverse slot-values)))) + #!-raw-instance-init-vops + (let ((instance (gensym "INSTANCE")) slot-values slot-specs raw-slots raw-values) + (mapc (lambda (dsd value) + (unless (eq value '.do-not-initialize-slot.) + (let ((raw-type (dsd-raw-type dsd))) + (cond ((eq t raw-type) + (push value slot-values) + (push (list* :slot raw-type (dsd-index dsd)) slot-specs)) + (t + (push value raw-values) + (push dsd raw-slots)))))) + (dd-slots dd) + values) + `(defun ,cons-name ,arglist + (declare ,@(mapcar (lambda (var type) `(type ,type ,var)) vars types)) + ,(if raw-slots + `(let ((,instance (%make-structure-instance-macro ,dd ',slot-specs ,@slot-values))) + ,@(mapcar (lambda (dsd value) + ;; (Note that we can't in general use the + ;; ordinary named slot setter function here + ;; because the slot might be :READ-ONLY, so we + ;; whip up new LAMBDA representations of slot + ;; setters for the occasion.) + `(,(slot-setter-lambda-form dd dsd) ,value ,instance)) + raw-slots + raw-values) + ,instance) + `(%make-structure-instance-macro ,dd ',slot-specs ,@slot-values))))) ;;; Create a default (non-BOA) keyword constructor. (defun create-keyword-constructor (defstruct creator) @@ -1327,7 +1454,7 @@ (types) (vals)) (dolist (slot (dd-slots defstruct)) - (let ((dum (gensym)) + (let ((dum (sb!xc:gensym "DUM")) (name (dsd-name slot))) (arglist `((,(keywordicate name) ,dum) ,(dsd-default slot))) (types (dsd-type slot)) @@ -1415,22 +1542,26 @@ (when auxp (arglist '&aux) (dolist (arg aux) - (arglist arg) (if (proper-list-of-length-p arg 2) - (let ((var (first arg))) - (vars var) - (types (get-slot var))) - (skipped-vars (if (consp arg) (first arg) arg)))))) + (let ((var (first arg))) + (arglist arg) + (vars var) + (types (get-slot var))) + (skipped-vars (if (consp arg) (first arg) arg)))))) (funcall creator defstruct (first boa) (arglist) (vars) (types) (loop for slot in (dd-slots defstruct) for name = (dsd-name slot) collect (cond ((find name (skipped-vars) :test #'string=) + ;; CLHS 3.4.6 Boa Lambda Lists (setf (dsd-safe-p slot) nil) '.do-not-initialize-slot.) ((or (find (dsd-name slot) (vars) :test #'string=) - (dsd-default slot))))))))) + (let ((type (dsd-type slot))) + (if (eq t type) + (dsd-default slot) + `(the ,type ,(dsd-default slot)))))))))))) ;;; Grovel the constructor options, and decide what constructors (if ;;; any) to create. @@ -1548,6 +1679,49 @@ (dd-type dd) dd-type) dd)) +;;; make !DEFSTRUCT-WITH-ALTERNATE-METACLASS compilable by the host +;;; lisp, installing the information we need to reason about the +;;; structures (layouts and classoids). +;;; +;;; FIXME: we should share the parsing and the DD construction between +;;; this and the cross-compiler version, but my brain was too small to +;;; get that right. -- CSR, 2006-09-14 +#+sb-xc-host +(defmacro !defstruct-with-alternate-metaclass + (class-name &key + (slot-names (missing-arg)) + (boa-constructor (missing-arg)) + (superclass-name (missing-arg)) + (metaclass-name (missing-arg)) + (metaclass-constructor (missing-arg)) + (dd-type (missing-arg)) + predicate + (runtime-type-checks-p t)) + + (declare (type (and list (not null)) slot-names)) + (declare (type (and symbol (not null)) + boa-constructor + superclass-name + metaclass-name + metaclass-constructor)) + (declare (type symbol predicate)) + (declare (type (member structure funcallable-structure) dd-type)) + (declare (ignore boa-constructor predicate runtime-type-checks-p)) + + (let* ((dd (make-dd-with-alternate-metaclass + :class-name class-name + :slot-names slot-names + :superclass-name superclass-name + :metaclass-name metaclass-name + :metaclass-constructor metaclass-constructor + :dd-type dd-type))) + `(progn + + (eval-when (:compile-toplevel :load-toplevel :execute) + (%compiler-set-up-layout ',dd ',(inherits-for-structure dd)))))) + +(sb!xc:proclaim '(special *defstruct-hooks*)) + (sb!xc:defmacro !defstruct-with-alternate-metaclass (class-name &key (slot-names (missing-arg)) @@ -1577,16 +1751,13 @@ :dd-type dd-type)) (dd-slots (dd-slots dd)) (dd-length (1+ (length slot-names))) - (object-gensym (gensym "OBJECT")) - (new-value-gensym (gensym "NEW-VALUE-")) + (object-gensym (sb!xc:gensym "OBJECT")) + (new-value-gensym (sb!xc:gensym "NEW-VALUE-")) (delayed-layout-form `(%delayed-get-compiler-layout ,class-name))) (multiple-value-bind (raw-maker-form raw-reffer-operator) (ecase dd-type (structure - (values `(let ((,object-gensym (%make-instance ,dd-length))) - (setf (%instance-layout ,object-gensym) - ,delayed-layout-form) - ,object-gensym) + (values `(%make-structure-instance-macro ,dd nil) '%instance-ref)) (funcallable-structure (values `(let ((,object-gensym @@ -1645,7 +1816,11 @@ ;; code, which knows how to generate inline type tests ;; for the whole CMU CL INSTANCE menagerie. `(defun ,predicate (,object-gensym) - (typep ,object-gensym ',class-name))))))) + (typep ,object-gensym ',class-name))) + + (when (boundp '*defstruct-hooks*) + (dolist (fun *defstruct-hooks*) + (funcall fun (find-classoid ',(dd-name dd))))))))) ;;;; finalizing bootstrapping @@ -1680,4 +1855,12 @@ (inherits (inherits-for-structure dd))) (%compiler-defstruct dd inherits))) +;;; finding these beasts +(defun find-defstruct-description (name &optional (errorp t)) + (let ((info (layout-info (classoid-layout (find-classoid name errorp))))) + (if (defstruct-description-p info) + info + (when errorp + (error "No DEFSTRUCT-DESCRIPTION for ~S." name))))) + (/show0 "code/defstruct.lisp end of file")