mdw@git.distorted.org.uk Git - sod/blob - src/class-output.lisp

   1 ;;; -*-lisp-*-
   2 ;;;
   3 ;;; Output for classes
   4 ;;;
   5 ;;; (c) 2009 Straylight/Edgeware
   6 ;;;
   7
   8 ;;;----- Licensing notice ---------------------------------------------------
   9 ;;;
  10 ;;; This file is part of the Sensible Object Design, an object system for C.
  11 ;;;
  12 ;;; SOD is free software; you can redistribute it and/or modify
  13 ;;; it under the terms of the GNU General Public License as published by
  14 ;;; the Free Software Foundation; either version 2 of the License, or
  15 ;;; (at your option) any later version.
  16 ;;;
  17 ;;; SOD is distributed in the hope that it will be useful,
  18 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;;; GNU General Public License for more details.
  21 ;;;
  22 ;;; You should have received a copy of the GNU General Public License
  23 ;;; along with SOD; if not, write to the Free Software Foundation,
  24 ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25
  26 (cl:in-package #:sod)
  27
  28 ;;;--------------------------------------------------------------------------
  29 ;;; Walking the layout tree.
  30
  31 (defmethod hook-output progn ((class sod-class) reason sequencer)
  32   (with-slots ((ilayout %ilayout) vtables methods effective-methods) class
  33     (hook-output ilayout reason sequencer)
  34     (dolist (method methods) (hook-output method reason sequencer))
  35     (dolist (method effective-methods) (hook-output method reason sequencer))
  36     (dolist (vtable vtables) (hook-output vtable reason sequencer))))
  37
  38 (defmethod hook-output progn ((ilayout ilayout) reason sequencer)
  39   (with-slots (ichains) ilayout
  40     (dolist (ichain ichains) (hook-output ichain reason sequencer))))
  41
  42 (defmethod hook-output progn ((ichain ichain) reason sequencer)
  43   (dolist (item (ichain-body ichain))
  44     (hook-output item reason sequencer)))
  45
  46 (defmethod hook-output progn ((islots islots) reason sequencer)
  47   (dolist (slot (islots-slots islots))
  48     (hook-output slot reason sequencer)))
  49
  50 (defmethod hook-output progn ((vtable vtable) reason sequencer)
  51   (with-slots (body) vtable
  52     (dolist (item body) (hook-output item reason sequencer))))
  53
  54 (defmethod hook-output progn ((vtmsgs vtmsgs) reason sequencer)
  55   (with-slots (entries) vtmsgs
  56     (dolist (entry entries) (hook-output entry reason sequencer))))
  57
  58 ;;;--------------------------------------------------------------------------
  59 ;;; Classes.
  60
  61 (defmethod hook-output progn ((class sod-class) (reason (eql :h)) sequencer)
  62
  63   ;; Main output sequencing.
  64   (sequence-output (stream sequencer)
  65
  66     :constraint
  67     ((:classes :start)
  68      (class :banner)
  69      (class :islots :start) (class :islots :slots) (class :islots :end)
  70      (class :vtmsgs :start) (class :vtmsgs :end)
  71      (class :vtables :start) (class :vtables :end)
  72      (class :vtable-externs) (class :vtable-externs-after)
  73      (class :methods :start) (class :methods) (class :methods :end)
  74      (class :ichains :start) (class :ichains :end)
  75      (class :ilayout :start) (class :ilayout :slots) (class :ilayout :end)
  76      (class :conversions)
  77      (class :message-macros)
  78      (class :object)
  79      (:classes :end))
  80
  81     (:typedefs
  82      (format stream "typedef struct ~A ~A;~%"
  83              (ichain-struct-tag class (sod-class-chain-head class)) class))
  84
  85     ((class :banner)
  86      (banner (format nil "Class ~A" class) stream))
  87     ((class :vtable-externs-after)
  88      (terpri stream))
  89
  90     ((class :vtable-externs)
  91      (format stream "/* Vtable structures. */~%"))
  92
  93     ((class :object)
  94      (let ((metaclass (sod-class-metaclass class))
  95            (metaroot (find-root-metaclass class)))
  96        (format stream "/* The class object. */~@
  97                        extern const struct ~A ~A__classobj;~@
  98                        #define ~:*~A__class (&~:*~A__classobj.~A.~A)~2%"
  99                (ilayout-struct-tag metaclass) class
 100                (sod-class-nickname (sod-class-chain-head metaroot))
 101                (sod-class-nickname metaroot)))))
 102
 103   ;; Maybe generate an islots structure.
 104   (when (sod-class-slots class)
 105     (dolist (slot (sod-class-slots class))
 106       (hook-output slot 'islots sequencer))
 107     (sequence-output (stream sequencer)
 108       ((class :islots :start)
 109        (format stream "/* Instance slots. */~@
 110                        struct ~A {~%"
 111                (islots-struct-tag class)))
 112       ((class :islots :end)
 113        (format stream "};~2%"))))
 114
 115   ;; Declare the direct methods.
 116   (when (sod-class-methods class)
 117     (sequence-output (stream sequencer)
 118       ((class :methods :start)
 119        (format stream "/* Direct methods. */~%"))
 120       ((class :methods :end)
 121        (terpri stream))))
 122
 123   ;; Provide upcast macros which do the right thing.
 124   (when (sod-class-direct-superclasses class)
 125     (sequence-output (stream sequencer)
 126       ((class :conversions)
 127        (let ((chain-head (sod-class-chain-head class)))
 128          (format stream "/* Conversion macros. */~%")
 129          (dolist (super (cdr (sod-class-precedence-list class)))
 130            (let ((super-head (sod-class-chain-head super)))
 131              (format stream "#define ~:@(~A__CONV_~A~)(_obj) ((~A *)~
 132                                      ~:[SOD_XCHAIN(~A, (_obj))~;(_obj)~])~%"
 133                      class (sod-class-nickname super) super
 134                      (eq chain-head super-head)
 135                      (sod-class-nickname super-head))))
 136          (terpri stream)))))
 137
 138   ;; Provide convenience macros for sending the newly defined messages.  (The
 139   ;; macros work on all subclasses too.)
 140   ;;
 141   ;; We need each message's method entry type for this, so we need to dig it
 142   ;; out of the vtmsgs structure.  Indeed, the vtmsgs for this class contains
 143   ;; entries for precisely the messages we want to make macros for.
 144   (when (sod-class-messages class)
 145     (sequence-output (stream sequencer)
 146       ((class :message-macros)
 147        (let* ((vtable (find (sod-class-chain-head class)
 148                             (sod-class-vtables class)
 149                             :key #'vtable-chain-head))
 150               (vtmsgs (find-if (lambda (item)
 151                                  (and (typep item 'vtmsgs)
 152                                       (eql (vtmsgs-class item) class)))
 153                                (vtable-body vtable))))
 154          (format stream "/* Message invocation macros. */~%")
 155          (dolist (entry (vtmsgs-entries vtmsgs))
 156            (let* ((type (method-entry-function-type entry))
 157                   (args (c-function-arguments type))
 158                   (in-names nil) (out-names nil) (varargsp nil) (me "me"))
 159              (do ((args args (cdr args)))
 160                  ((endp args))
 161                (let* ((raw-name (princ-to-string (argument-name (car args))))
 162                       (name (if (find raw-name
 163                                       (list "_vt"
 164                                             (sod-class-nickname class)
 165                                             (method-entry-slot-name entry))
 166                                       :test #'string=)
 167                                 (format nil "sod__a_~A" raw-name)
 168                                 raw-name)))
 169                  (cond ((and (cdr args) (eq (cadr args) :ellipsis))
 170                         (setf varargsp t)
 171                         (unless in-names (setf me "SOD__CAR(__VA_ARGS__)"))
 172                         (push (format nil "/*~A*/ ..." name) in-names)
 173                         (push "__VA_ARGS__" out-names)
 174                         (return))
 175                        (t
 176                         (push name in-names)
 177                         (push name out-names)))))
 178              (when varargsp
 179                (format stream "#if __STDC_VERSION__ >= 199901~%"))
 180              (format stream "#define ~A(~{~A~^, ~}) ~
 181                                    ~A->_vt->~A.~A(~{~A~^, ~})~%"
 182                      (message-macro-name class entry)
 183                      (nreverse in-names)
 184                      me
 185                      (sod-class-nickname class)
 186                      (method-entry-slot-name entry)
 187                      (nreverse out-names))
 188              (when varargsp
 189                (format stream "#endif~%"))))
 190          (terpri stream)))))
 191
 192   ;; Generate vtmsgs structure for all superclasses.
 193   (hook-output (car (sod-class-vtables class)) 'vtmsgs sequencer))
 194
 195 ;;;--------------------------------------------------------------------------
 196 ;;; Instance structure.
 197
 198 (defmethod hook-output progn ((slot sod-slot)
 199                               (reason (eql 'islots))
 200                               sequencer)
 201   (sequence-output (stream sequencer)
 202     (((sod-slot-class slot) :islots :slots)
 203      (pprint-logical-block (stream nil :prefix "  " :suffix ";")
 204        (pprint-c-type (sod-slot-type slot) stream (sod-slot-name slot)))
 205      (terpri stream))))
 206
 207 (defmethod hook-output progn ((ilayout ilayout) (reason (eql :h)) sequencer)
 208   (with-slots ((class %class) ichains) ilayout
 209     (sequence-output (stream sequencer)
 210       ((class :ilayout :start)
 211        (format stream "/* Instance layout. */~@
 212                        struct ~A {~%"
 213                (ilayout-struct-tag class)))
 214       ((class :ilayout :end)
 215        (format stream "};~2%")))
 216     (dolist (ichain ichains)
 217       (hook-output ichain 'ilayout sequencer))))
 218
 219 (defmethod hook-output progn ((ichain ichain) (reason (eql :h)) sequencer)
 220   (with-slots ((class %class) chain-head chain-tail) ichain
 221     (when (eq class chain-tail)
 222       (sequence-output (stream sequencer)
 223         :constraint ((class :ichains :start)
 224                      (class :ichain chain-head :start)
 225                      (class :ichain chain-head :slots)
 226                      (class :ichain chain-head :end)
 227                      (class :ichains :end))
 228         ((class :ichain chain-head :start)
 229          (format stream "/* Instance chain structure. */~@
 230                          struct ~A {~%"
 231                  (ichain-struct-tag chain-tail chain-head)))
 232         ((class :ichain chain-head :end)
 233          (format stream "};~2%")
 234          (format stream "/* Union of equivalent superclass chains. */~@
 235                          union ~A {~@
 236                          ~:{  struct ~A ~A;~%~}~
 237                          };~2%"
 238                  (ichain-union-tag chain-tail chain-head)
 239
 240                  ;; Make sure the most specific class is first: only the
 241                  ;; first element of a union can be statically initialized in
 242                  ;; C90.
 243                  (mapcar (lambda (super)
 244                            (list (ichain-struct-tag super chain-head)
 245                                  (sod-class-nickname super)))
 246                          (sod-class-chain chain-tail))))))))
 247
 248 (defmethod hook-output progn ((ichain ichain)
 249                               (reason (eql 'ilayout))
 250                               sequencer)
 251   (with-slots ((class %class) chain-head chain-tail) ichain
 252     (sequence-output (stream sequencer)
 253       ((class :ilayout :slots)
 254        (format stream "  union ~A ~A;~%"
 255                (ichain-union-tag chain-tail chain-head)
 256                (sod-class-nickname chain-head))))))
 257
 258 (defmethod hook-output progn ((vtptr vtable-pointer)
 259                               (reason (eql :h))
 260                               sequencer)
 261   (with-slots ((class %class) chain-head chain-tail) vtptr
 262     (sequence-output (stream sequencer)
 263       ((class :ichain chain-head :slots)
 264        (format stream "  const struct ~A *_vt;~%"
 265                (vtable-struct-tag chain-tail chain-head))))))
 266
 267 (defmethod hook-output progn ((islots islots) (reason (eql :h)) sequencer)
 268   (with-slots ((class %class) subclass slots) islots
 269     (sequence-output (stream sequencer)
 270       ((subclass :ichain (sod-class-chain-head class) :slots)
 271        (format stream "  struct ~A ~A;~%"
 272                (islots-struct-tag class)
 273                (sod-class-nickname class))))))
 274
 275 ;;;--------------------------------------------------------------------------
 276 ;;; Vtable structure.
 277
 278 (defmethod hook-output progn ((method sod-method)
 279                               (reason (eql :h))
 280                               sequencer)
 281   (with-slots ((class %class)) method
 282     (sequence-output (stream sequencer)
 283       ((class :methods)
 284        (let ((type (sod-method-function-type method)))
 285          (princ "extern " stream)
 286          (pprint-c-type (commentify-function-type type) stream
 287                         (sod-method-function-name method))
 288          (format stream ";~%"))))))
 289
 290 (defmethod hook-output progn ((vtable vtable) (reason (eql :h)) sequencer)
 291   (with-slots ((class %class) chain-head chain-tail) vtable
 292     (when (eq class chain-tail)
 293       (sequence-output (stream sequencer)
 294         :constraint ((class :vtables :start)
 295                      (class :vtable chain-head :start)
 296                      (class :vtable chain-head :slots)
 297                      (class :vtable chain-head :end)
 298                      (class :vtables :end))
 299         ((class :vtable chain-head :start)
 300          (format stream "/* Vtable structure. */~@
 301                          struct ~A {~%"
 302                  (vtable-struct-tag chain-tail chain-head)))
 303         ((class :vtable chain-head :end)
 304          (format stream "};~2%")
 305          (format stream "/* Union of equivalent superclass vtables. */~@
 306                          union ~A {~@
 307                          ~:{  struct ~A ~A;~%~}~
 308                          };~2%"
 309                  (vtable-union-tag chain-tail chain-head)
 310
 311                  ;; As for the ichain union, make sure the most specific
 312                  ;; class is first.
 313                  (mapcar (lambda (super)
 314                            (list (vtable-struct-tag super chain-head)
 315                                  (sod-class-nickname super)))
 316                          (sod-class-chain chain-tail))))))
 317     (sequence-output (stream sequencer)
 318       ((class :vtable-externs)
 319        (format stream "~@<extern const union ~A ~2I~_~A;~:>~%"
 320                (vtable-union-tag chain-tail chain-head)
 321                (vtable-name class chain-head))))))
 322
 323 (defmethod hook-output progn ((vtmsgs vtmsgs) (reason (eql :h)) sequencer)
 324   (with-slots ((class %class) subclass chain-head chain-tail) vtmsgs
 325     (sequence-output (stream sequencer)
 326       ((subclass :vtable chain-head :slots)
 327        (format stream "  struct ~A ~A;~%"
 328                (vtmsgs-struct-tag subclass class)
 329                (sod-class-nickname class))))))
 330
 331 (defmethod hook-output progn ((vtmsgs vtmsgs)
 332                               (reason (eql 'vtmsgs))
 333                               sequencer)
 334   (when (vtmsgs-entries vtmsgs)
 335     (with-slots ((class %class) subclass) vtmsgs
 336       (sequence-output (stream sequencer)
 337         :constraint ((subclass :vtmsgs :start)
 338                      (subclass :vtmsgs class :start)
 339                      (subclass :vtmsgs class :slots)
 340                      (subclass :vtmsgs class :end)
 341                      (subclass :vtmsgs :end))
 342         ((subclass :vtmsgs class :start)
 343          (format stream "/* Messages protocol from class ~A */~@
 344                          struct ~A {~%"
 345                  class
 346                  (vtmsgs-struct-tag subclass class)))
 347         ((subclass :vtmsgs class :end)
 348          (format stream "};~2%"))))))
 349
 350 (defmethod hook-output progn ((entry method-entry)
 351                               (reason (eql 'vtmsgs))
 352                               sequencer)
 353   (let* ((method (method-entry-effective-method entry))
 354          (message (effective-method-message method))
 355          (class (effective-method-class method))
 356          (function-type (method-entry-function-type entry))
 357          (commented-type (commentify-function-type function-type))
 358          (pointer-type (make-pointer-type commented-type)))
 359     (sequence-output (stream sequencer)
 360       ((class :vtmsgs (sod-message-class message) :slots)
 361        (pprint-logical-block (stream nil :prefix "  " :suffix ";")
 362          (pprint-c-type pointer-type stream (method-entry-slot-name entry)))
 363        (terpri stream)))))
 364
 365 (defmethod hook-output progn ((cptr class-pointer)
 366                               (reason (eql :h))
 367                               sequencer)
 368   (with-slots ((class %class) chain-head metaclass meta-chain-head) cptr
 369     (sequence-output (stream sequencer)
 370       ((class :vtable chain-head :slots)
 371        (format stream "  const ~A *~:[_class~;~:*_cls_~A~];~%"
 372                metaclass
 373                (and (sod-class-direct-superclasses meta-chain-head)
 374                     (sod-class-nickname meta-chain-head)))))))
 375
 376 (defmethod hook-output progn ((boff base-offset) (reason (eql :h)) sequencer)
 377   (with-slots ((class %class) chain-head) boff
 378     (sequence-output (stream sequencer)
 379       ((class :vtable chain-head :slots)
 380        (write-line "  size_t _base;" stream)))))
 381
 382 (defmethod hook-output progn ((choff chain-offset)
 383                               (reason (eql :h))
 384                               sequencer)
 385   (with-slots ((class %class) chain-head target-head) choff
 386     (sequence-output (stream sequencer)
 387       ((class :vtable chain-head :slots)
 388        (format stream "  ptrdiff_t _off_~A;~%"
 389                (sod-class-nickname target-head))))))
 390
 391 ;;;--------------------------------------------------------------------------
 392 ;;; Implementation output.
 393
 394 (export '*instance-class*)
 395 (defvar *instance-class* nil
 396   "The class currently being output.
 397
 398    This is bound during the `hook-output' traversal of a class layout for
 399    `:c' output, since some of the objects traversed actually `belong' to
 400    superclasses and there's no other way to find out what the reference class
 401    actually is.
 402
 403    It may be bound at other times.")
 404
 405 (defmethod hook-output progn ((class sod-class) (reason (eql :c)) sequencer)
 406   (sequence-output (stream sequencer)
 407
 408     :constraint
 409     ((:classes :start)
 410      (class :banner)
 411      (class :direct-methods :start) (class :direct-methods :end)
 412      (class :effective-methods)
 413      (class :vtables :start) (class :vtables :end)
 414      (class :object :prepare) (class :object :start) (class :object :end)
 415      (:classes :end))
 416
 417     ((class :banner)
 418      (banner (format nil "Class ~A" class) stream))
 419
 420     ((class :object :start)
 421      (format stream "~
 422 /* The class object. */
 423 const struct ~A ~A__classobj = {~%"
 424              (ilayout-struct-tag (sod-class-metaclass class))
 425              class))
 426     ((class :object :end)
 427      (format stream "};~2%")))
 428
 429   (let ((*instance-class* class))
 430     (hook-output (sod-class-ilayout (sod-class-metaclass class))
 431                  'class sequencer)))
 432
 433 ;;;--------------------------------------------------------------------------
 434 ;;; Direct and effective methods.
 435
 436 (defmethod hook-output progn ((method delegating-direct-method)
 437                               (reason (eql :c))
 438                               sequencer)
 439   (with-slots ((class %class) body) method
 440     (unless body
 441       (return-from hook-output))
 442     (sequence-output (stream sequencer)
 443       ((class :direct-method method :start)
 444        (format stream "#define CALL_NEXT_METHOD (next_method(~{~A~^, ~}))~%"
 445                (mapcar #'argument-name
 446                        (c-function-arguments (sod-method-next-method-type
 447                                               method)))))
 448       ((class :direct-method method :end)
 449        (format stream "#undef CALL_NEXT_METHOD~%")))))
 450
 451 (defmethod hook-output progn ((method sod-method)
 452                               (reason (eql :c))
 453                               sequencer)
 454   (with-slots ((class %class) body) method
 455     (unless body
 456       (return-from hook-output))
 457     (sequence-output (stream sequencer)
 458       :constraint ((class :direct-methods :start)
 459                    (class :direct-method method :start)
 460                    (class :direct-method method :body)
 461                    (class :direct-method method :end)
 462                    (class :direct-methods :end))
 463       ((class :direct-method method :body)
 464        (pprint-c-type (sod-method-function-type method)
 465                       stream
 466                       (sod-method-function-name method))
 467        (format stream "~&{~%")
 468        (write body :stream stream :pretty nil :escape nil)
 469        (format stream "~&}~%"))
 470       ((class :direct-method method :end)
 471        (terpri stream)))))
 472
 473 (defmethod hook-output progn ((method basic-effective-method)
 474                               (reason (eql :c))
 475                               sequencer)
 476   (with-slots ((class %class) functions) method
 477     (sequence-output (stream sequencer)
 478       ((class :effective-methods)
 479        (dolist (func functions)
 480          (write func :stream stream :escape nil :circle nil))))))
 481
 482 ;;;--------------------------------------------------------------------------
 483 ;;; Vtables.
 484
 485 (defmethod hook-output progn ((vtable vtable) (reason (eql :c)) sequencer)
 486   (with-slots ((class %class) chain-head chain-tail) vtable
 487     (sequence-output (stream sequencer)
 488       :constraint ((class :vtables :start)
 489                    (class :vtable chain-head :start)
 490                    (class :vtable chain-head :end)
 491                    (class :vtables :end))
 492       ((class :vtable chain-head :start)
 493        (format stream "/* Vtable for ~A chain. */~@
 494                        const union ~A ~A = { {~%"
 495                chain-head
 496                (vtable-union-tag chain-tail chain-head)
 497                (vtable-name class chain-head)))
 498       ((class :vtable chain-head :end)
 499        (format stream "} };~2%")))))
 500
 501 (defmethod hook-output progn ((cptr class-pointer)
 502                               (reason (eql :c))
 503                               sequencer)
 504   (with-slots ((class %class) chain-head metaclass meta-chain-head) cptr
 505     (sequence-output (stream sequencer)
 506       :constraint ((class :vtable chain-head :start)
 507                    (class :vtable chain-head :class-pointer metaclass)
 508                    (class :vtable chain-head :end))
 509       ((class :vtable chain-head :class-pointer metaclass)
 510        (format stream "  /* ~21@A = */ &~A__classobj.~A.~A,~%"
 511                (if (sod-class-direct-superclasses meta-chain-head)
 512                    (format nil "_cls_~A"
 513                            (sod-class-nickname meta-chain-head))
 514                    "_class")
 515                class
 516                (sod-class-nickname meta-chain-head)
 517                (sod-class-nickname metaclass))))))
 518
 519 (defmethod hook-output progn ((boff base-offset) (reason (eql :c)) sequencer)
 520   (with-slots ((class %class) chain-head) boff
 521     (sequence-output (stream sequencer)
 522       :constraint ((class :vtable chain-head :start)
 523                    (class :vtable chain-head :base-offset)
 524                    (class :vtable chain-head :end))
 525       ((class :vtable chain-head :base-offset)
 526        (format stream "  /* ~21@A = */ offsetof(struct ~A, ~A),~%"
 527                "_base"
 528                (ilayout-struct-tag class)
 529                (sod-class-nickname chain-head))))))
 530
 531 (defmethod hook-output progn ((choff chain-offset)
 532                               (reason (eql :c))
 533                               sequencer)
 534   (with-slots ((class %class) chain-head target-head) choff
 535     (sequence-output (stream sequencer)
 536       :constraint ((class :vtable chain-head :start)
 537                    (class :vtable chain-head :chain-offset target-head)
 538                    (class :vtable chain-head :end))
 539       ((class :vtable chain-head :chain-offset target-head)
 540        (format stream "  /* ~21@A = */ SOD_OFFSETDIFF(struct ~A, ~A, ~A),~%"
 541                (format nil "_off_~A" (sod-class-nickname target-head))
 542                (ilayout-struct-tag class)
 543                (sod-class-nickname chain-head)
 544                (sod-class-nickname target-head))))))
 545
 546 (defmethod hook-output progn ((vtmsgs vtmsgs) (reason (eql :c)) sequencer)
 547   (with-slots ((class %class) subclass chain-head) vtmsgs
 548     (sequence-output (stream sequencer)
 549       :constraint ((subclass :vtable chain-head :start)
 550                    (subclass :vtable chain-head :vtmsgs class :start)
 551                    (subclass :vtable chain-head :vtmsgs class :slots)
 552                    (subclass :vtable chain-head :vtmsgs class :end)
 553                    (subclass :vtable chain-head :end))
 554       ((subclass :vtable chain-head :vtmsgs class :start)
 555        (format stream "  { /* Method entries for ~A messages. */~%"
 556                class))
 557       ((subclass :vtable chain-head :vtmsgs class :end)
 558        (format stream "  },~%")))))
 559
 560 (defmethod hook-output progn ((entry method-entry)
 561                               (reason (eql :c))
 562                               sequencer)
 563   (with-slots ((method %method) chain-head chain-tail role) entry
 564     (let* ((message (effective-method-message method))
 565            (class (effective-method-class method))
 566            (super (sod-message-class message)))
 567       (sequence-output (stream sequencer)
 568         ((class :vtable chain-head :vtmsgs super :slots)
 569          (format stream "    /* ~19@A = */ ~A,~%"
 570                  (method-entry-slot-name entry)
 571                  (method-entry-function-name method chain-head role)))))))
 572
 573 ;;;--------------------------------------------------------------------------
 574 ;;; Filling in the class object.
 575
 576 (defmethod hook-output progn ((ichain ichain)
 577                               (reason (eql 'class))
 578                               sequencer)
 579   (with-slots ((class %class) chain-head) ichain
 580     (sequence-output (stream sequencer)
 581       :constraint ((*instance-class* :object :start)
 582                    (*instance-class* :object chain-head :ichain :start)
 583                    (*instance-class* :object chain-head :ichain :end)
 584                    (*instance-class* :object :end))
 585       ((*instance-class* :object chain-head :ichain :start)
 586        (format stream "  { { /* ~A ichain */~%"
 587                (sod-class-nickname chain-head)))
 588       ((*instance-class* :object chain-head :ichain :end)
 589        (format stream "  } },~%")))))
 590
 591 (defmethod hook-output progn ((islots islots)
 592                               (reason (eql 'class))
 593                               sequencer)
 594   (with-slots ((class %class)) islots
 595     (let ((chain-head (sod-class-chain-head class)))
 596       (sequence-output (stream sequencer)
 597         :constraint ((*instance-class* :object chain-head :ichain :start)
 598                      (*instance-class* :object class :slots :start)
 599                      (*instance-class* :object class :slots)
 600                      (*instance-class* :object class :slots :end)
 601                      (*instance-class* :object chain-head :ichain :end))
 602         ((*instance-class* :object class :slots :start)
 603          (format stream "      { /* Class ~A */~%" class))
 604         ((*instance-class* :object class :slots :end)
 605          (format stream "      },~%"))))))
 606
 607 (defmethod hook-output progn ((vtptr vtable-pointer)
 608                               (reason (eql 'class))
 609                               sequencer)
 610   (with-slots ((class %class) chain-head chain-tail) vtptr
 611     (sequence-output (stream sequencer)
 612       :constraint ((*instance-class* :object chain-head :ichain :start)
 613                    (*instance-class* :object chain-head :vtable)
 614                    (*instance-class* :object chain-head :ichain :end))
 615       ((*instance-class* :object chain-head :vtable)
 616        (format stream "      /* ~17@A = */ &~A.~A,~%"
 617                "_vt"
 618                (vtable-name class chain-head)
 619                (sod-class-nickname chain-tail))))))
 620
 621 (defgeneric find-class-initializer (slot class)
 622   (:method ((slot effective-slot) (class sod-class))
 623     (let ((dslot (effective-slot-direct-slot slot)))
 624       (or (some (lambda (super)
 625                   (find dslot (sod-class-class-initializers super)
 626                         :test #'sod-initializer-slot))
 627                 (sod-class-precedence-list class))
 628           (effective-slot-initializer slot)))))
 629
 630 (defgeneric output-class-initializer (slot instance stream)
 631   (:method ((slot sod-class-effective-slot) (instance sod-class) stream)
 632     (let ((func (effective-slot-initializer-function slot))
 633           (direct-slot (effective-slot-direct-slot slot)))
 634       (if func
 635           (format stream "        /* ~15@A = */ ~A,~%"
 636                   (sod-slot-name direct-slot)
 637                   (funcall func instance))
 638           (call-next-method))))
 639   (:method ((slot effective-slot) (instance sod-class) stream)
 640     (let ((init (find-class-initializer slot instance))
 641           (direct-slot (effective-slot-direct-slot slot)))
 642       (ecase (sod-initializer-value-kind init)
 643         (:simple (format stream "        /* ~15@A = */ ~A,~%"
 644                          (sod-slot-name direct-slot)
 645                          (sod-initializer-value-form init)))
 646         (:compound (format stream "        /* ~15@A = */ ~@<{ ~;~A~; },~:>~%"
 647                            (sod-slot-name direct-slot)
 648                            (sod-initializer-value-form init)))))))
 649
 650 (defmethod hook-output progn ((slot sod-class-effective-slot)
 651                               (reason (eql 'class))
 652                               sequencer)
 653   (let ((instance *instance-class*)
 654         (func (effective-slot-prepare-function slot)))
 655     (when func
 656       (sequence-output (stream sequencer)
 657         ((instance :object :prepare)
 658          (funcall func instance stream))))))
 659
 660 (defmethod hook-output progn ((slot effective-slot)
 661                               (reason (eql 'class))
 662                               sequencer)
 663   (with-slots ((class %class) (dslot slot)) slot
 664     (let ((instance *instance-class*)
 665           (super (sod-slot-class dslot)))
 666       (sequence-output (stream sequencer)
 667         ((instance :object super :slots)
 668          (output-class-initializer slot instance stream))))))
 669
 670 ;;;----- That's all, folks --------------------------------------------------