/usr/share/hol88-2.02.19940316/lisp/f-parser.l is in hol88-source 2.02.19940316-28.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; HOL 88 Version 2.0 ;;;
;;; ;;;
;;; FILE NAME: f-parser.l ;;;
;;; ;;;
;;; DESCRIPTION: System parser ;;;
;;; ;;;
;;; USES FILES: f-franz.l (or f-cl.l), f-constants.l, f-macro.l ;;;
;;; ;;;
;;; University of Cambridge ;;;
;;; Hardware Verification Group ;;;
;;; Computer Laboratory ;;;
;;; New Museums Site ;;;
;;; Pembroke Street ;;;
;;; Cambridge CB2 3QG ;;;
;;; England ;;;
;;; ;;;
;;; COPYRIGHT: University of Edinburgh ;;;
;;; COPYRIGHT: University of Cambridge ;;;
;;; COPYRIGHT: INRIA ;;;
;;; ;;;
;;; REVISION HISTORY: Original code: parser (lisp 1.6) part of Edinburgh ;;;
;;; LCF by M. Gordon, R. Milner and C. Wadsworth (1978) ;;;
;;; Transported by G. Huet in Maclisp on Multics, Fall ;;;
;;; 1981 ;;;
;;; ;;;
;;; V1.4 :idents may not start with ', but may include. ;;;
;;; strings may include% ;;;
;;; ;;;
;;; V2.2 :new-exit instead of err in function parse-failed ;;;
;;; ;;;
;;; V3.1 : |...| notation for literal atoms ;;;
;;; ;;;
;;; to do: ;;;
;;; replace parser completely ;;;
;;; speed it up ;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(eval-when (compile)
#+franz (include "lisp/f-franz")
(include "lisp/f-constants")
(include "lisp/f-macro")
(special %skiplimit %char-buffer %special-letters %special-alphanums
%special-table %ch |%read_sexpr-flag| %syntax-block-enabled))
(eval-when (compile)
(defmacro bounded (lower a upper)
`(and (<= ,lower ,a) (<= ,a ,upper)))) ; bounded
(setq %skiplimit 30) ; number of strings to print when skipping
;;; Object language strings
(setq eq-tok '|==|)
;;; iff-tok removed [TFM 91.01.20]
(setq spec-toks
(list lambda-tok else-tok '|:| '|(| '|)| anticnr-tok condl-tok
'|,| '|.| eq-tok '|<<| '|~| conj-tok disj-tok imp-tok
exists-tok forall-tok endcnrtok))
;;; Meta language symbols
(setq %char-buffer nil)
(defun next-char ()
;; pop %char-buffer if it is non-empty, otherwise read a character.
(cond
(%char-buffer
(prog1
(car %char-buffer)
(setq %char-buffer (cdr %char-buffer))))
(t (nextcn))))
;;; Added by MJCG on 3/3/89 for HOL88.1.01
;;; Function to skip regular comments % ... % and supercomments %< ... >%
;;; Entered after %< read.
(defun skip-comments ()
(prog (ch)
(setq ch (next-char))
(setq %ch (next-char))
loop (cond ((and (= ch cmntchr) (= %ch cmnt-start))
(skip-comments)
(setq %ch (next-char)))
((and (= ch cmnt-end) (= %ch cmntchr))
(return)))
(setq ch %ch)
(setq %ch (next-char))
(go loop)))
;;; get next char
;;; (not possible to skip blanks because of vartypes)
;;; Changed by MJCG on 3/3/89 for HOL88.1.01 to call skip-comments
;;; and use global %ch
(defun gnc ()
(setq %ch (next-char))
(cond ((= %ch cmntchr)
(setq %ch (next-char))
(cond ((= %ch cmntchr))
((= %ch cmnt-start) (skip-comments))
(t (while (not (= (next-char) cmntchr)))))
(gnc))
(t %ch)))
;;; Old code (pre HOL88.1.01)
;;;(defun gnc ()
;;; (let ((ch (next-char)))
;;; (cond ((= ch cmntchr)
;;; (while (not (= (next-char) cmntchr))) ;skip comments
;;; (gnc))
;;; (t ch)))) ;gnc
;;; initialize lexical analyzer
(defun initlean ()
(setq token nil)
(setq tokchs nil)
(setq toktyp nil)
(setq hol-char hol-space)
(setq toklist nil)) ;initlean
;;; get next string
;;; BUG: scans the first number in a quotation as a number instead of an
;;; identifier (see gnt.l).
(defun gnt ()
(setq cflag (spacep hol-char)) ;for vartypes (berk)
(setq ptoken token)
(setq ptokchs tokchs)
(setq ptoktyp toktyp)
(setq pchar hol-char)
(while (spacep hol-char)(setq pchar (setq hol-char (gnc))));remove spacing
(setq toktyp 1)
(cond ((letterp hol-char) (setq tokchs (list hol-char)) ;ident
(ident))
((digitp hol-char) (setq tokchs (list hol-char)) ;number (ML only)
(if (eq lang1 'ml1) (numb) (ident)))
((= hol-char tokqt) (setq tokchs nil) ;string
(tcn))
(t (setq toktyp 2)
(setq hol-char (gnc))
(setq token (ascii pchar))
(if (and(eq token scolon-sym)(= hol-char lf)) ;multics: lines end
(setq hol-char (gnc))) ; with lf was (prog2 (gnc)(gnc))
(while (memq hol-char (get token 'double))
(setq token (concat token (ascii hol-char)))
(setq hol-char (gnc)))))
token) ;gnt
(defun numb ()
;;scan a number and return its numeric value
(let ((accu (- hol-char #/0)))
(while (digitp (setq hol-char (next-char)))
(setq accu (+ (* accu 10) (- hol-char #/0))))
(setq token accu))) ; numb
(defun ident ()
;; scan an identifier as a symbol (used also for numbers in OL)
(while (alphanump (setq hol-char (gnc)))
(push hol-char tokchs))
(setq token (imploden (reverse tokchs)))) ;ident
;;; Changed nconc to append to fix RJB bug (MJCG 12/11/89)
(defun tcn ()
(while (not (= (setq hol-char (next-char)) tokqt))
(if (= hol-char escape)
(setq tokchs (append (escape-rtn (next-char)) tokchs))
(push hol-char tokchs)))
(newr toklist (imploden (reverse tokchs)))
(setq hol-char (gnc))
(setq token tokflag)) ; tcn
(defun escape-rtn (char)
(cond ((= char #/0) (itrate hol-space 10))
((digitp char) (itrate hol-space (- char #/0)))
((get (ascii char) 'stringmacro))
(t (list char)))) ;escape-rtn
(defun vartype-rtn ()
(prog (n)
(if cflag (return mul-sym))
(setq n 1)
loop (ifn (or (numberp token) (= toktyp 1) (eq token mul-sym))
(return (imploden (itrate multiply n))))
(gnt)
(when (and (eq ptoken mul-sym) (not cflag))
(setq n (add1 n))
(go loop))
(return (imploden (nconc (itrate multiply n) (exploden ptoken))))
)) ;vartype-rtn
(setq token nil)
(setq ptoken nil)
(setq tokchs nil)
(setq ptokchs nil)
(setq toktyp nil)
(setq ptoktyp nil)
(setq hol-char hol-space)
;;; MJCG 27/10/88 for HOL88
(setq %special-letters nil)
(setq %special-alphanums nil)
(defun charp (ch)
(bounded #/! ch #/~)) ; charp
(defun upperp (ch)
(bounded #/A ch #/Z)) ; upperp
(defun lowerp (ch)
(bounded #/a ch #/z)) ; lowerp
;;; MJCG 27/10/88 for HOL88
;;; Added %special-letters
(defun letterp (ch)
(or (upperp ch) (lowerp ch) (memq ch %special-letters))) ; letterp
(defun digitp (ch)
(bounded #/0 ch #/9)) ; digitp
;;; MJCG 27/10/88 for HOL88
;;; Added %special-alphanums
(defun alphanump (ch)
(or (upperp ch)
(lowerp ch)
(digitp ch)
(= ch #/')
(= ch #/_)
(memq ch %special-letters)
(memq ch %special-alphanums))) ; alphanump
(defun spacep (ch)
(memq ch (list hol-space cr lf tab ff))) ; spacep
;;; set up token escape codes
(putprop '|L| (list lf) 'stringmacro)
(putprop '|F| (list ff) 'stringmacro)
(putprop '|R| (list cr) 'stringmacro)
(putprop '|S| (list hol-space) 'stringmacro)
(putprop '|T| (list tab) 'stringmacro)
;;; set up lexical analysis of multi-character special symbols
;;; ideally should be divided ML from OL
;;; MJCG 27/10/88 for HOL88
;;; Function for setting up double property and recording the
;;; result in %special-table (a disembodied property list)
(setq %special-table #+franz (list 'special-table) #-franz nil)
(defun put-double (x l)
(prog2
#+franz
(putprop %special-table (union l (get %special-table x)) x)
#-franz
(setf (getf %special-table x) (union l (getf %special-table x)))
(putprop x (union l (get x 'double)) 'double)))
(eval-when (load)
(put-double '|=| '(#/> #/=))
(put-double '|-| '(#/>))
(put-double '|<| '(#/< #/=))
(put-double '|:| '(#/=))
(put-double '|?| '(#/? #/\))
(put-double '|;| '(#/;))
(put-double '|:| '(#/:))
(put-double '|!| '(#/! #/\))
(put-double '|/| '(#/\))
(put-double '\\ '(#//))
(put-double '|==| '(#/>))
(put-double '|<=| '(#/>)))
(defun unop (op code)
(putprop op code lang1)) ;unop
(defun bnop (op code)
(putprop op code lang2)) ;bnop
(defun binop (op lp code)
(putprop op code lang2) (putprop op lp langlp)) ;binop
;;; check for expected token, return rslt if OK
;;; the token is expected AFTER the parsing of rslt
(defun check (tok rslt msg)
(cond ((eq tok token) (gnt) rslt) (t (parse-failed msg)))) ;check
(defun parse-failed (msg)
(llprinc msg)
(llterpri)
(llprinc '|skipping: |)
(llprinc ptoken)
(llprinc space-sym)
(llprinc token)
(llprinc space-sym)
(do ((i %skiplimit (1- i)))
((eq token tml-sym) (if (<= i 0) (llprinc '|. . .|)))
(gnt)
(when (> i 0) (llprinc token) (llprinc space-sym)))
(initlean)
(eqsetup)
(persetup)
(scolonsetup)
(hol-persetup) ; defined in: hol-pars.l
(hol-restrictsetup) ; defined in: hol-pars.l
(hol-insetup) ; defined in: parslet.l
(hol-andsetup) ; defined in: parslet.l
(hol-eqsetup) ; defined in: parslet.l
(hol-commasetup) ; defined in: parslist.l
(hol-scolonsetup) ; defined in: parslist.l
(throw-from parse nil)) ;parse-failed
(setq arg1 nil)
;;; Lisp flag that says at least one syntax block is in operation
;;; Set to t by ml-new_syntax_block in hol-pars.l
(setq %syntax-block-enabled nil)
;;; Added 2.2.90 by MJCG for syntax blocks
;;; Grabs raw characters up to (but not including) the terminator
;;; and returns the result imploded into a string
(defun syntax-block-rtn (terminator)
(prog (chars terminator-chars remaining)
(setq chars nil)
(setq terminator-chars (exploden terminator))
loop (setq remaining (cdr terminator-chars))
(while
(not (= (setq hol-char (next-char)) (car terminator-chars)))
(if (= hol-char escape)
(setq chars (append (escape-rtn (next-char)) chars))
(push hol-char chars)))
(ifn remaining (go exit))
(push hol-char chars)
(while
(and remaining (= (setq hol-char (next-char)) (car remaining)))
(setq remaining (cdr remaining))
(push hol-char chars))
(ifn remaining (go exit))
(push hol-char chars)
(go loop)
exit (setq remaining terminator-chars)
(while remaining
(setq remaining (cdr remaining))
(setq chars (cdr chars)))
(setq ptoken terminator)
(setq hol-char (gnc))
(setq token (gnt))
(return (imploden(nreverse chars)))))
;;; Added 2.2.90 by MJCG
;;; Constructs the parse tree of the translation of a syntax block
(defun mk-syntax-block (tok)
`(mk-appn
(mk-var ,(car(get tok 'syntax-block)))
(mk-tokconst ,(syntax-block-rtn (cdr(get tok 'syntax-block))))))
;;; MJCG 10.12.90 for Centaur:
;;; Constructs the parse tree of the translation of an S-expression block
(defun mk-sexpression-block (tok)
(prog (%sexpression terminator)
(setq %sexpression (read))
(setq terminator (cdr(get tok 'sexpression-block)))
(if (eq %sexpression terminator)
(parse-failed "Missing S-expression"))
(gnt)
(cond ((eq token terminator)
(gnt)
(return
(apply (car(get tok 'sexpression-block)) (list %sexpression)))))
(parse-failed (concat "Missing terminator: " terminator))))
;;; MJCG 10.12.90 for Centaur:
;;; Flag to enable input in S-expression form
;;; Modified 13.12.90 by JVT. Moved the addition of |%read_sexpr-flag| to
;;; the %flags list to the file lisp/f-iox-stand.l. The reason being that
;;; %flags is an unknown variable at this stage.
(setq |%read_sexpr-flag| nil)
;;; main parse routine
;;; parses text until reaching level cpl
;;; saves its result in the *special arg1
;;; Modified 2.2.90 by MJCG to handle syntax blocks
;;; Modified 10.2.90 by JVT to fix the syntax blocks for Common Lisp.
;;; -- Involves the adding of a check on numbers because CL doesn't
;;; like one doing a "get" on them (e.g. (get '0 'syntax-block))
;;; MJCG 10.12.90 for Centaur: added support for S-expression input
(defun parse-level (cpl)
(prog (x)
(incf parsedepth)
(cond ((and %syntax-block-enabled
(not (numberp token))
(get token 'syntax-block))
(decf parsedepth)
(return (setq arg1 (mk-syntax-block token))))
((and |%read_sexpr-flag|
(not (numberp token))
(get token 'sexpression-block))
(decf parsedepth)
(return (setq arg1 (mk-sexpression-block token))))
(t
(gnt)))
(setq arg1
(ifn (or (numberp ptoken) (null (setq x (get ptoken lang1))))
(eval x)
(eval atom-rtn)))
loop (setq x (ifn (numberp token) (get token langlp)))
(unless x
(when (lessp cpl juxtlevel) (setq arg1 (eval juxt-rtn)) (go loop))
(decf parsedepth)
(return arg1))
(unless (lessp cpl x) (decf parsedepth) (return arg1))
(if (memq (car arg1) declnconstrs)
(parse-failed '|non top level decln must have IN clause|))
(setq x (get token lang2))
(if (null x)
(parse-failed (catenate '|`| token '|` in the wrong place|)))
(gnt)
(setq arg1 (eval x))
(go loop))) ;parse-level
|