lisp/calc/calc-aent.el

   1 ;;; calc-aent.el --- algebraic entry functions for Calc
   2
   3 ;; Copyright (C) 1990, 1991, 1992, 1993, 2001 Free Software Foundation, Inc.
   4
   5 ;; Author: Dave Gillespie <daveg@synaptics.com>
   6 ;; Maintainers: D. Goel <deego@gnufans.org>
   7 ;;              Colin Walters <walters@debian.org>
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is distributed in the hope that it will be useful,
  12 ;; but WITHOUT ANY WARRANTY.  No author or distributor
  13 ;; accepts responsibility to anyone for the consequences of using it
  14 ;; or for whether it serves any particular purpose or works at all,
  15 ;; unless he says so in writing.  Refer to the GNU Emacs General Public
  16 ;; License for full details.
  17
  18 ;; Everyone is granted permission to copy, modify and redistribute
  19 ;; GNU Emacs, but only under the conditions described in the
  20 ;; GNU Emacs General Public License.   A copy of this license is
  21 ;; supposed to have been given to you along with GNU Emacs so you
  22 ;; can know your rights and responsibilities.  It should be in a
  23 ;; file named COPYING.  Among other things, the copyright notice
  24 ;; and this notice must be preserved on all copies.
  25
  26 ;;; Commentary:
  27
  28 ;;; Code:
  29
  30 ;; This file is autoloaded from calc.el.
  31 (require 'calc)
  32
  33 (require 'calc-macs)
  34 (eval-when-compile '(require calc-macs))
  35
  36 (defun calc-Need-calc-aent () nil)
  37
  38
  39 (defun calc-do-quick-calc ()
  40   (calc-check-defines)
  41   (if (eq major-mode 'calc-mode)
  42       (calc-algebraic-entry t)
  43     (let (buf shortbuf)
  44       (save-excursion
  45         (calc-create-buffer)
  46         (let* ((calc-command-flags nil)
  47                (calc-dollar-values calc-quick-prev-results)
  48                (calc-dollar-used 0)
  49                (enable-recursive-minibuffers t)
  50                (calc-language (if (memq calc-language '(nil big))
  51                                   'flat calc-language))
  52                (entry (calc-do-alg-entry "" "Quick calc: " t))
  53                (alg-exp (mapcar (function
  54                                  (lambda (x)
  55                                    (if (and (not calc-extensions-loaded)
  56                                             calc-previous-alg-entry
  57                                             (string-match
  58                                              "\\`[-0-9._+*/^() ]+\\'"
  59                                              calc-previous-alg-entry))
  60                                        (calc-normalize x)
  61                                      (calc-extensions)
  62                                      (math-evaluate-expr x))))
  63                                 entry)))
  64           (when (and (= (length alg-exp) 1)
  65                      (eq (car-safe (car alg-exp)) 'calcFunc-assign)
  66                      (= (length (car alg-exp)) 3)
  67                      (eq (car-safe (nth 1 (car alg-exp))) 'var))
  68             (calc-extensions)
  69             (set (nth 2 (nth 1 (car alg-exp))) (nth 2 (car alg-exp)))
  70             (calc-refresh-evaltos (nth 2 (nth 1 (car alg-exp))))
  71             (setq alg-exp (list (nth 2 (car alg-exp)))))
  72           (setq calc-quick-prev-results alg-exp
  73                 buf (mapconcat (function (lambda (x)
  74                                            (math-format-value x 1000)))
  75                                alg-exp
  76                                " ")
  77                 shortbuf buf)
  78           (if (and (= (length alg-exp) 1)
  79                    (memq (car-safe (car alg-exp)) '(nil bigpos bigneg))
  80                    (< (length buf) 20)
  81                    (= calc-number-radix 10))
  82               (setq buf (concat buf "  ("
  83                                 (let ((calc-number-radix 16))
  84                                   (math-format-value (car alg-exp) 1000))
  85                                 ", "
  86                                 (let ((calc-number-radix 8))
  87                                   (math-format-value (car alg-exp) 1000))
  88                                 (if (and (integerp (car alg-exp))
  89                                          (> (car alg-exp) 0)
  90                                          (< (car alg-exp) 127))
  91                                     (format ", \"%c\"" (car alg-exp))
  92                                   "")
  93                                 ")")))
  94           (if (and (< (length buf) (frame-width)) (= (length entry) 1)
  95                    calc-extensions-loaded)
  96               (let ((long (concat (math-format-value (car entry) 1000)
  97                                   " =>  " buf)))
  98                 (if (<= (length long) (- (frame-width) 8))
  99                     (setq buf long))))
 100           (calc-handle-whys)
 101           (message "Result: %s" buf)))
 102       (if (eq last-command-char 10)
 103           (insert shortbuf)
 104         (setq kill-ring (cons shortbuf kill-ring))
 105         (when (> (length kill-ring) kill-ring-max)
 106           (setcdr (nthcdr (1- kill-ring-max) kill-ring) nil))
 107         (setq kill-ring-yank-pointer kill-ring)))))
 108
 109 (defun calc-do-calc-eval (str separator args)
 110   (calc-check-defines)
 111   (catch 'calc-error
 112     (save-excursion
 113       (calc-create-buffer)
 114       (cond
 115        ((and (consp str) (not (symbolp (car str))))
 116         (let ((calc-language nil)
 117               (math-expr-opers math-standard-opers)
 118               (calc-internal-prec 12)
 119               (calc-word-size 32)
 120               (calc-symbolic-mode nil)
 121               (calc-matrix-mode nil)
 122               (calc-angle-mode 'deg)
 123               (calc-number-radix 10)
 124               (calc-leading-zeros nil)
 125               (calc-group-digits nil)
 126               (calc-point-char ".")
 127               (calc-frac-format '(":" nil))
 128               (calc-prefer-frac nil)
 129               (calc-hms-format "%s@ %s' %s\"")
 130               (calc-date-format '((H ":" mm C SS pp " ")
 131                                   Www " " Mmm " " D ", " YYYY))
 132               (calc-float-format '(float 0))
 133               (calc-full-float-format '(float 0))
 134               (calc-complex-format nil)
 135               (calc-matrix-just nil)
 136               (calc-full-vectors t)
 137               (calc-break-vectors nil)
 138               (calc-vector-commas ",")
 139               (calc-vector-brackets "[]")
 140               (calc-matrix-brackets '(R O))
 141               (calc-complex-mode 'cplx)
 142               (calc-infinite-mode nil)
 143               (calc-display-strings nil)
 144               (calc-simplify-mode nil)
 145               (calc-display-working-message 'lots)
 146               (strp (cdr str)))
 147           (while strp
 148             (set (car strp) (nth 1 strp))
 149             (setq strp (cdr (cdr strp))))
 150           (calc-do-calc-eval (car str) separator args)))
 151        ((eq separator 'eval)
 152         (eval str))
 153        ((eq separator 'macro)
 154         (calc-extensions)
 155         (let* ((calc-buffer (current-buffer))
 156                (calc-window (get-buffer-window calc-buffer))
 157                (save-window (selected-window)))
 158           (if calc-window
 159               (unwind-protect
 160                   (progn
 161                     (select-window calc-window)
 162                     (calc-execute-kbd-macro str nil (car args)))
 163                 (and (window-point save-window)
 164                      (select-window save-window)))
 165             (save-window-excursion
 166               (select-window (get-largest-window))
 167               (switch-to-buffer calc-buffer)
 168               (calc-execute-kbd-macro str nil (car args)))))
 169         nil)
 170        ((eq separator 'pop)
 171         (or (not (integerp str))
 172             (= str 0)
 173             (calc-pop (min str (calc-stack-size))))
 174         (calc-stack-size))
 175        ((eq separator 'top)
 176         (and (integerp str)
 177              (> str 0)
 178              (<= str (calc-stack-size))
 179              (math-format-value (calc-top-n str (car args)) 1000)))
 180        ((eq separator 'rawtop)
 181         (and (integerp str)
 182              (> str 0)
 183              (<= str (calc-stack-size))
 184              (calc-top-n str (car args))))
 185        (t
 186         (let* ((calc-command-flags nil)
 187                (calc-next-why nil)
 188                (calc-language (if (memq calc-language '(nil big))
 189                                   'flat calc-language))
 190                (calc-dollar-values (mapcar
 191                                     (function
 192                                      (lambda (x)
 193                                        (if (stringp x)
 194                                            (progn
 195                                              (setq x (math-read-exprs x))
 196                                              (if (eq (car-safe x)
 197                                                      'error)
 198                                                  (throw 'calc-error
 199                                                         (calc-eval-error
 200                                                          (cdr x)))
 201                                                (car x)))
 202                                          x)))
 203                                     args))
 204                (calc-dollar-used 0)
 205                (res (if (stringp str)
 206                         (math-read-exprs str)
 207                       (list str)))
 208                buf)
 209           (if (eq (car res) 'error)
 210               (calc-eval-error (cdr res))
 211             (setq res (mapcar 'calc-normalize res))
 212             (and (memq 'clear-message calc-command-flags)
 213                  (message ""))
 214             (cond ((eq separator 'pred)
 215                    (calc-extensions)
 216                    (if (= (length res) 1)
 217                        (math-is-true (car res))
 218                      (calc-eval-error '(0 "Single value expected"))))
 219                   ((eq separator 'raw)
 220                    (if (= (length res) 1)
 221                        (car res)
 222                      (calc-eval-error '(0 "Single value expected"))))
 223                   ((eq separator 'list)
 224                    res)
 225                   ((memq separator '(num rawnum))
 226                    (if (= (length res) 1)
 227                        (if (math-constp (car res))
 228                            (if (eq separator 'num)
 229                                (math-format-value (car res) 1000)
 230                              (car res))
 231                          (calc-eval-error
 232                           (list 0
 233                                 (if calc-next-why
 234                                     (calc-explain-why (car calc-next-why))
 235                                   "Number expected"))))
 236                      (calc-eval-error '(0 "Single value expected"))))
 237                   ((eq separator 'push)
 238                    (calc-push-list res)
 239                    nil)
 240                   (t (while res
 241                        (setq buf (concat buf
 242                                          (and buf (or separator ", "))
 243                                          (math-format-value (car res) 1000))
 244                              res (cdr res)))
 245                      buf)))))))))
 246
 247 (defun calc-eval-error (msg)
 248   (if (and (boundp 'calc-eval-error)
 249            calc-eval-error)
 250       (if (eq calc-eval-error 'string)
 251           (nth 1 msg)
 252         (error "%s" (nth 1 msg)))
 253     msg))
 254
 255
 256 ;;;; Reading an expression in algebraic form.
 257
 258 (defun calc-auto-algebraic-entry (&optional prefix)
 259   (interactive "P")
 260   (calc-algebraic-entry prefix t))
 261
 262 (defun calc-algebraic-entry (&optional prefix auto)
 263   (interactive "P")
 264   (calc-wrapper
 265    (let ((calc-language (if prefix nil calc-language))
 266          (math-expr-opers (if prefix math-standard-opers math-expr-opers)))
 267      (calc-alg-entry (and auto (char-to-string last-command-char))))))
 268
 269 (defun calc-alg-entry (&optional initial prompt)
 270   (let* ((sel-mode nil)
 271          (calc-dollar-values (mapcar 'calc-get-stack-element
 272                                      (nthcdr calc-stack-top calc-stack)))
 273          (calc-dollar-used 0)
 274          (calc-plain-entry t)
 275          (alg-exp (calc-do-alg-entry initial prompt t)))
 276     (if (stringp alg-exp)
 277         (progn
 278           (calc-extensions)
 279           (calc-alg-edit alg-exp))
 280       (let* ((calc-simplify-mode (if (eq last-command-char ?\C-j)
 281                                      'none
 282                                    calc-simplify-mode))
 283              (nvals (mapcar 'calc-normalize alg-exp)))
 284         (while alg-exp
 285           (calc-record (if calc-extensions-loaded (car alg-exp) (car nvals))
 286                        "alg'")
 287           (calc-pop-push-record-list calc-dollar-used
 288                                      (and (not (equal (car alg-exp)
 289                                                       (car nvals)))
 290                                           calc-extensions-loaded
 291                                           "")
 292                                      (list (car nvals)))
 293           (setq alg-exp (cdr alg-exp)
 294                 nvals (cdr nvals)
 295                 calc-dollar-used 0)))
 296       (calc-handle-whys))))
 297
 298 (defun calc-do-alg-entry (&optional initial prompt no-normalize)
 299   (let* ((calc-buffer (current-buffer))
 300          (blink-paren-function 'calcAlg-blink-matching-open)
 301          (alg-exp 'error))
 302     (unless (boundp 'calc-alg-ent-map)
 303       (setq calc-alg-ent-map (copy-keymap minibuffer-local-map))
 304       (define-key calc-alg-ent-map "'" 'calcAlg-previous)
 305       (define-key calc-alg-ent-map "`" 'calcAlg-edit)
 306       (define-key calc-alg-ent-map "\C-m" 'calcAlg-enter)
 307       (define-key calc-alg-ent-map "\C-j" 'calcAlg-enter)
 308       (or calc-emacs-type-19
 309           (let ((i 33))
 310             (setq calc-alg-ent-esc-map (copy-sequence esc-map))
 311             (while (< i 127)
 312               (aset calc-alg-ent-esc-map i 'calcAlg-escape)
 313               (setq i (1+ i))))))
 314     (unless calc-emacs-type-19
 315       (define-key calc-alg-ent-map "\e" nil))
 316     (if (eq calc-algebraic-mode 'total)
 317         (define-key calc-alg-ent-map "\e" calc-alg-ent-esc-map)
 318       (define-key calc-alg-ent-map "\ep" 'calcAlg-plus-minus)
 319       (define-key calc-alg-ent-map "\em" 'calcAlg-mod)
 320       (define-key calc-alg-ent-map "\e=" 'calcAlg-equals)
 321       (define-key calc-alg-ent-map "\e\r" 'calcAlg-equals)
 322       (define-key calc-alg-ent-map "\e%" 'self-insert-command))
 323     (setq calc-aborted-prefix nil)
 324     (let ((buf (read-from-minibuffer (or prompt "Algebraic: ")
 325                                      (or initial "")
 326                                      calc-alg-ent-map nil)))
 327       (when (eq alg-exp 'error)
 328         (when (eq (car-safe (setq alg-exp (math-read-exprs buf))) 'error)
 329           (setq alg-exp nil)))
 330       (setq calc-aborted-prefix "alg'")
 331       (or no-normalize
 332           (and alg-exp (setq alg-exp (mapcar 'calc-normalize alg-exp))))
 333       alg-exp)))
 334
 335 (defun calcAlg-plus-minus ()
 336   (interactive)
 337   (if (calc-minibuffer-contains ".* \\'")
 338       (insert "+/- ")
 339     (insert " +/- ")))
 340
 341 (defun calcAlg-mod ()
 342   (interactive)
 343   (if (not (calc-minibuffer-contains ".* \\'"))
 344       (insert " "))
 345   (if (calc-minibuffer-contains ".* mod +\\'")
 346       (if calc-previous-modulo
 347           (insert (math-format-flat-expr calc-previous-modulo 0))
 348         (beep))
 349     (insert "mod ")))
 350
 351 (defun calcAlg-previous ()
 352   (interactive)
 353   (if (calc-minibuffer-contains "\\`\\'")
 354       (if calc-previous-alg-entry
 355           (insert calc-previous-alg-entry)
 356         (beep))
 357     (insert "'")))
 358
 359 (defun calcAlg-equals ()
 360   (interactive)
 361   (unwind-protect
 362       (calcAlg-enter)
 363     (if (consp alg-exp)
 364         (progn (setq prefix-arg (length alg-exp))
 365                (calc-unread-command ?=)))))
 366
 367 (defun calcAlg-escape ()
 368   (interactive)
 369   (calc-unread-command)
 370   (save-excursion
 371     (calc-select-buffer)
 372     (use-local-map calc-mode-map))
 373   (calcAlg-enter))
 374
 375 (defvar calc-plain-entry nil)
 376 (defun calcAlg-edit ()
 377   (interactive)
 378   (if (or (not calc-plain-entry)
 379           (calc-minibuffer-contains
 380            "\\`\\([^\"]*\"[^\"]*\"\\)*[^\"]*\"[^\"]*\\'"))
 381       (insert "`")
 382     (setq alg-exp (minibuffer-contents))
 383     (and (> (length alg-exp) 0) (setq calc-previous-alg-entry alg-exp))
 384     (exit-minibuffer)))
 385
 386 (defun calcAlg-enter ()
 387   (interactive)
 388   (let* ((str (minibuffer-contents))
 389          (exp (and (> (length str) 0)
 390                    (save-excursion
 391                      (set-buffer calc-buffer)
 392                      (math-read-exprs str)))))
 393     (if (eq (car-safe exp) 'error)
 394         (progn
 395           (goto-char (minibuffer-prompt-end))
 396           (forward-char (nth 1 exp))
 397           (beep)
 398           (calc-temp-minibuffer-message
 399            (concat " [" (or (nth 2 exp) "Error") "]"))
 400           (calc-clear-unread-commands))
 401       (setq alg-exp (if (calc-minibuffer-contains "\\` *\\[ *\\'")
 402                         '((incomplete vec))
 403                       exp))
 404       (and (> (length str) 0) (setq calc-previous-alg-entry str))
 405       (exit-minibuffer))))
 406
 407 (defun calcAlg-blink-matching-open ()
 408   (let ((oldpos (point))
 409         (blinkpos nil))
 410     (save-excursion
 411       (condition-case ()
 412           (setq blinkpos (scan-sexps oldpos -1))
 413         (error nil)))
 414     (if (and blinkpos
 415              (> oldpos (1+ (point-min)))
 416              (or (and (= (char-after (1- oldpos)) ?\))
 417                       (= (char-after blinkpos) ?\[))
 418                  (and (= (char-after (1- oldpos)) ?\])
 419                       (= (char-after blinkpos) ?\()))
 420              (save-excursion
 421                (goto-char blinkpos)
 422                (looking-at ".+\\(\\.\\.\\|\\\\dots\\|\\\\ldots\\)")))
 423         (let ((saved (aref (syntax-table) (char-after blinkpos))))
 424           (unwind-protect
 425               (progn
 426                 (aset (syntax-table) (char-after blinkpos)
 427                       (+ (logand saved 255)
 428                          (lsh (char-after (1- oldpos)) 8)))
 429                 (blink-matching-open))
 430             (aset (syntax-table) (char-after blinkpos) saved)))
 431       (blink-matching-open))))
 432
 433
 434 (defun calc-alg-digit-entry ()
 435   (calc-alg-entry
 436    (cond ((eq last-command-char ?e)
 437           (if (> calc-number-radix 14) (format "%d.^" calc-number-radix) "1e"))
 438          ((eq last-command-char ?#) (format "%d#" calc-number-radix))
 439          ((eq last-command-char ?_) "-")
 440          ((eq last-command-char ?@) "0@ ")
 441          (t (char-to-string last-command-char)))))
 442
 443 (defun calcDigit-algebraic ()
 444   (interactive)
 445   (if (calc-minibuffer-contains ".*[@oh] *[^'m ]+[^'m]*\\'")
 446       (calcDigit-key)
 447     (setq calc-digit-value (minibuffer-contents))
 448     (exit-minibuffer)))
 449
 450 (defun calcDigit-edit ()
 451   (interactive)
 452   (calc-unread-command)
 453   (setq calc-digit-value (minibuffer-contents))
 454   (exit-minibuffer))
 455
 456
 457 ;;; Algebraic expression parsing.   [Public]
 458
 459 (defun math-read-exprs (exp-str)
 460   (let ((exp-pos 0)
 461         (exp-old-pos 0)
 462         (exp-keep-spaces nil)
 463         exp-token exp-data)
 464     (if calc-language-input-filter
 465         (setq exp-str (funcall calc-language-input-filter exp-str)))
 466     (while (setq exp-token (string-match "\\.\\.\\([^.]\\|.[^.]\\)" exp-str))
 467       (setq exp-str (concat (substring exp-str 0 exp-token) "\\dots"
 468                             (substring exp-str (+ exp-token 2)))))
 469     (math-build-parse-table)
 470     (math-read-token)
 471     (let ((val (catch 'syntax (math-read-expr-list))))
 472       (if (stringp val)
 473           (list 'error exp-old-pos val)
 474         (if (equal exp-token 'end)
 475             val
 476           (list 'error exp-old-pos "Syntax error"))))))
 477
 478 (defun math-read-expr-list ()
 479   (let* ((exp-keep-spaces nil)
 480          (val (list (math-read-expr-level 0)))
 481          (last val))
 482     (while (equal exp-data ",")
 483       (math-read-token)
 484       (let ((rest (list (math-read-expr-level 0))))
 485         (setcdr last rest)
 486         (setq last rest)))
 487     val))
 488
 489 (defvar calc-user-parse-table nil)
 490 (defvar calc-last-main-parse-table nil)
 491 (defvar calc-last-lang-parse-table nil)
 492 (defvar calc-user-tokens nil)
 493 (defvar calc-user-token-chars nil)
 494
 495 (defun math-build-parse-table ()
 496   (let ((mtab (cdr (assq nil calc-user-parse-tables)))
 497         (ltab (cdr (assq calc-language calc-user-parse-tables))))
 498     (or (and (eq mtab calc-last-main-parse-table)
 499              (eq ltab calc-last-lang-parse-table))
 500         (let ((p (append mtab ltab))
 501               (toks nil))
 502           (setq calc-user-parse-table p)
 503           (setq calc-user-token-chars nil)
 504           (while p
 505             (math-find-user-tokens (car (car p)))
 506             (setq p (cdr p)))
 507           (setq calc-user-tokens (mapconcat 'identity
 508                                             (sort (mapcar 'car toks)
 509                                                   (function (lambda (x y)
 510                                                               (> (length x)
 511                                                                  (length y)))))
 512                                             "\\|")
 513                 calc-last-main-parse-table mtab
 514                 calc-last-lang-parse-table ltab)))))
 515
 516 (defun math-find-user-tokens (p)   ; uses "toks"
 517   (while p
 518     (cond ((and (stringp (car p))
 519                 (or (> (length (car p)) 1) (equal (car p) "$")
 520                     (equal (car p) "\""))
 521                 (string-match "[^a-zA-Z0-9]" (car p)))
 522            (let ((s (regexp-quote (car p))))
 523              (if (string-match "\\`[a-zA-Z0-9]" s)
 524                  (setq s (concat "\\<" s)))
 525              (if (string-match "[a-zA-Z0-9]\\'" s)
 526                  (setq s (concat s "\\>")))
 527              (or (assoc s toks)
 528                  (progn
 529                    (setq toks (cons (list s) toks))
 530                    (or (memq (aref (car p) 0) calc-user-token-chars)
 531                        (setq calc-user-token-chars
 532                              (cons (aref (car p) 0)
 533                                    calc-user-token-chars)))))))
 534           ((consp (car p))
 535            (math-find-user-tokens (nth 1 (car p)))
 536            (or (eq (car (car p)) '\?)
 537                (math-find-user-tokens (nth 2 (car p))))))
 538     (setq p (cdr p))))
 539
 540 (defun math-read-token ()
 541   (if (>= exp-pos (length exp-str))
 542       (setq exp-old-pos exp-pos
 543             exp-token 'end
 544             exp-data "\000")
 545     (let ((ch (aref exp-str exp-pos)))
 546       (setq exp-old-pos exp-pos)
 547       (cond ((memq ch '(32 10 9))
 548              (setq exp-pos (1+ exp-pos))
 549              (if exp-keep-spaces
 550                  (setq exp-token 'space
 551                        exp-data " ")
 552                (math-read-token)))
 553             ((and (memq ch calc-user-token-chars)
 554                   (let ((case-fold-search nil))
 555                     (eq (string-match calc-user-tokens exp-str exp-pos)
 556                         exp-pos)))
 557              (setq exp-token 'punc
 558                    exp-data (math-match-substring exp-str 0)
 559                    exp-pos (match-end 0)))
 560             ((or (and (>= ch ?a) (<= ch ?z))
 561                  (and (>= ch ?A) (<= ch ?Z)))
 562              (string-match (if (memq calc-language '(c fortran pascal maple))
 563                                "[a-zA-Z0-9_#]*"
 564                              "[a-zA-Z0-9'#]*")
 565                            exp-str exp-pos)
 566              (setq exp-token 'symbol
 567                    exp-pos (match-end 0)
 568                    exp-data (math-restore-dashes
 569                              (math-match-substring exp-str 0)))
 570              (if (eq calc-language 'eqn)
 571                  (let ((code (assoc exp-data math-eqn-ignore-words)))
 572                    (cond ((null code))
 573                          ((null (cdr code))
 574                           (math-read-token))
 575                          ((consp (nth 1 code))
 576                           (math-read-token)
 577                           (if (assoc exp-data (cdr code))
 578                               (setq exp-data (format "%s %s"
 579                                                      (car code) exp-data))))
 580                          ((eq (nth 1 code) 'punc)
 581                           (setq exp-token 'punc
 582                                 exp-data (nth 2 code)))
 583                          (t
 584                           (math-read-token)
 585                           (math-read-token))))))
 586             ((or (and (>= ch ?0) (<= ch ?9))
 587                  (and (eq ch '?\.)
 588                       (eq (string-match "\\.[0-9]" exp-str exp-pos) exp-pos))
 589                  (and (eq ch '?_)
 590                       (eq (string-match "_\\.?[0-9]" exp-str exp-pos) exp-pos)
 591                       (or (eq exp-pos 0)
 592                           (and (memq calc-language '(nil flat big unform
 593                                                          tex eqn))
 594                                (eq (string-match "[^])}\"a-zA-Z0-9'$]_"
 595                                                  exp-str (1- exp-pos))
 596                                    (1- exp-pos))))))
 597              (or (and (eq calc-language 'c)
 598                       (string-match "0[xX][0-9a-fA-F]+" exp-str exp-pos))
 599                  (string-match "_?\\([0-9]+.?0*@ *\\)?\\([0-9]+.?0*' *\\)?\\(0*\\([2-9]\\|1[0-4]\\)\\(#\\|\\^\\^\\)[0-9a-dA-D.]+[eE][-+_]?[0-9]+\\|0*\\([2-9]\\|[0-2][0-9]\\|3[0-6]\\)\\(#\\|\\^\\^\\)[0-9a-zA-Z:.]+\\|[0-9]+:[0-9:]+\\|[0-9.]+\\([eE][-+_]?[0-9]+\\)?\"?\\)?" exp-str exp-pos))
 600              (setq exp-token 'number
 601                    exp-data (math-match-substring exp-str 0)
 602                    exp-pos (match-end 0)))
 603             ((eq ch ?\$)
 604              (if (and (eq calc-language 'pascal)
 605                       (eq (string-match
 606                            "\\(\\$[0-9a-fA-F]+\\)\\($\\|[^0-9a-zA-Z]\\)"
 607                            exp-str exp-pos)
 608                           exp-pos))
 609                  (setq exp-token 'number
 610                        exp-data (math-match-substring exp-str 1)
 611                        exp-pos (match-end 1))
 612                (if (eq (string-match "\\$\\([1-9][0-9]*\\)" exp-str exp-pos)
 613                        exp-pos)
 614                    (setq exp-data (- (string-to-int (math-match-substring
 615                                                      exp-str 1))))
 616                  (string-match "\\$+" exp-str exp-pos)
 617                  (setq exp-data (- (match-end 0) (match-beginning 0))))
 618                (setq exp-token 'dollar
 619                      exp-pos (match-end 0))))
 620             ((eq ch ?\#)
 621              (if (eq (string-match "#\\([1-9][0-9]*\\)" exp-str exp-pos)
 622                      exp-pos)
 623                  (setq exp-data (string-to-int
 624                                  (math-match-substring exp-str 1))
 625                        exp-pos (match-end 0))
 626                (setq exp-data 1
 627                      exp-pos (1+ exp-pos)))
 628              (setq exp-token 'hash))
 629             ((eq (string-match "~=\\|<=\\|>=\\|<>\\|/=\\|\\+/-\\|\\\\dots\\|\\\\ldots\\|\\*\\*\\|<<\\|>>\\|==\\|!=\\|&&&\\||||\\|!!!\\|&&\\|||\\|!!\\|:=\\|::\\|=>"
 630                                exp-str exp-pos)
 631                  exp-pos)
 632              (setq exp-token 'punc
 633                    exp-data (math-match-substring exp-str 0)
 634                    exp-pos (match-end 0)))
 635             ((and (eq ch ?\")
 636                   (string-match "\\(\"\\([^\"\\]\\|\\\\.\\)*\\)\\(\"\\|\\'\\)" exp-str exp-pos))
 637              (if (eq calc-language 'eqn)
 638                  (progn
 639                    (setq exp-str (copy-sequence exp-str))
 640                    (aset exp-str (match-beginning 1) ?\{)
 641                    (if (< (match-end 1) (length exp-str))
 642                        (aset exp-str (match-end 1) ?\}))
 643                    (math-read-token))
 644                (setq exp-token 'string
 645                      exp-data (math-match-substring exp-str 1)
 646                      exp-pos (match-end 0))))
 647             ((and (= ch ?\\) (eq calc-language 'tex)
 648                   (< exp-pos (1- (length exp-str))))
 649              (or (string-match "\\\\hbox *{\\([a-zA-Z0-9]+\\)}" exp-str exp-pos)
 650                  (string-match "\\(\\\\\\([a-zA-Z]+\\|[^a-zA-Z]\\)\\)" exp-str exp-pos))
 651              (setq exp-token 'symbol
 652                    exp-pos (match-end 0)
 653                    exp-data (math-restore-dashes
 654                              (math-match-substring exp-str 1)))
 655              (let ((code (assoc exp-data math-tex-ignore-words)))
 656                (cond ((null code))
 657                      ((null (cdr code))
 658                       (math-read-token))
 659                      ((eq (nth 1 code) 'punc)
 660                       (setq exp-token 'punc
 661                             exp-data (nth 2 code)))
 662                      ((and (eq (nth 1 code) 'mat)
 663                            (string-match " *{" exp-str exp-pos))
 664                       (setq exp-pos (match-end 0)
 665                             exp-token 'punc
 666                             exp-data "[")
 667                       (let ((right (string-match "}" exp-str exp-pos)))
 668                         (and right
 669                              (setq exp-str (copy-sequence exp-str))
 670                              (aset exp-str right ?\])))))))
 671             ((and (= ch ?\.) (eq calc-language 'fortran)
 672                   (eq (string-match "\\.[a-zA-Z][a-zA-Z][a-zA-Z]?\\."
 673                                     exp-str exp-pos) exp-pos))
 674              (setq exp-token 'punc
 675                    exp-data (upcase (math-match-substring exp-str 0))
 676                    exp-pos (match-end 0)))
 677             ((and (eq calc-language 'math)
 678                   (eq (string-match "\\[\\[\\|->\\|:>" exp-str exp-pos)
 679                       exp-pos))
 680              (setq exp-token 'punc
 681                    exp-data (math-match-substring exp-str 0)
 682                    exp-pos (match-end 0)))
 683             ((and (eq calc-language 'eqn)
 684                   (eq (string-match "->\\|<-\\|+-\\|\\\\dots\\|~\\|\\^"
 685                                     exp-str exp-pos)
 686                       exp-pos))
 687              (setq exp-token 'punc
 688                    exp-data (math-match-substring exp-str 0)
 689                    exp-pos (match-end 0))
 690              (and (eq (string-match "\\\\dots\\." exp-str exp-pos) exp-pos)
 691                   (setq exp-pos (match-end 0)))
 692              (if (memq (aref exp-data 0) '(?~ ?^))
 693                  (math-read-token)))
 694             ((eq (string-match "%%.*$" exp-str exp-pos) exp-pos)
 695              (setq exp-pos (match-end 0))
 696              (math-read-token))
 697             (t
 698              (if (and (eq ch ?\{) (memq calc-language '(tex eqn)))
 699                  (setq ch ?\())
 700              (if (and (eq ch ?\}) (memq calc-language '(tex eqn)))
 701                  (setq ch ?\)))
 702              (if (and (eq ch ?\&) (eq calc-language 'tex))
 703                  (setq ch ?\,))
 704              (setq exp-token 'punc
 705                    exp-data (char-to-string ch)
 706                    exp-pos (1+ exp-pos)))))))
 707
 708
 709 (defun math-read-expr-level (exp-prec &optional exp-term)
 710   (let* ((x (math-read-factor)) (first t) op op2)
 711     (while (and (or (and calc-user-parse-table
 712                          (setq op (calc-check-user-syntax x exp-prec))
 713                          (setq x op
 714                                op '("2x" ident 999999 -1)))
 715                     (and (setq op (assoc exp-data math-expr-opers))
 716                          (/= (nth 2 op) -1)
 717                          (or (and (setq op2 (assoc
 718                                              exp-data
 719                                              (cdr (memq op math-expr-opers))))
 720                                   (eq (= (nth 3 op) -1)
 721                                       (/= (nth 3 op2) -1))
 722                                   (eq (= (nth 3 op2) -1)
 723                                       (not (math-factor-after)))
 724                                   (setq op op2))
 725                              t))
 726                     (and (or (eq (nth 2 op) -1)
 727                              (memq exp-token '(symbol number dollar hash))
 728                              (equal exp-data "(")
 729                              (and (equal exp-data "[")
 730                                   (not (eq calc-language 'math))
 731                                   (not (and exp-keep-spaces
 732                                             (eq (car-safe x) 'vec)))))
 733                          (or (not (setq op (assoc exp-data math-expr-opers)))
 734                              (/= (nth 2 op) -1))
 735                          (or (not calc-user-parse-table)
 736                              (not (eq exp-token 'symbol))
 737                              (let ((p calc-user-parse-table))
 738                                (while (and p
 739                                            (or (not (integerp
 740                                                      (car (car (car p)))))
 741                                                (not (equal
 742                                                      (nth 1 (car (car p)))
 743                                                      exp-data))))
 744                                  (setq p (cdr p)))
 745                                (not p)))
 746                          (setq op (assoc "2x" math-expr-opers))))
 747                 (not (and exp-term (equal exp-data exp-term)))
 748                 (>= (nth 2 op) exp-prec))
 749       (if (not (equal (car op) "2x"))
 750           (math-read-token))
 751       (and (memq (nth 1 op) '(sdev mod))
 752            (calc-extensions))
 753       (setq x (cond ((consp (nth 1 op))
 754                      (funcall (car (nth 1 op)) x op))
 755                     ((eq (nth 3 op) -1)
 756                      (if (eq (nth 1 op) 'ident)
 757                          x
 758                        (if (eq (nth 1 op) 'closing)
 759                            (if (eq (nth 2 op) exp-prec)
 760                                (progn
 761                                  (setq exp-prec 1000)
 762                                  x)
 763                              (throw 'syntax "Mismatched delimiters"))
 764                          (list (nth 1 op) x))))
 765                     ((and (not first)
 766                           (memq (nth 1 op) math-alg-inequalities)
 767                           (memq (car-safe x) math-alg-inequalities))
 768                      (calc-extensions)
 769                      (math-composite-inequalities x op))
 770                     (t (list (nth 1 op)
 771                              x
 772                              (math-read-expr-level (nth 3 op) exp-term))))
 773             first nil))
 774     x))
 775
 776 (defun calc-check-user-syntax (&optional x prec)
 777   (let ((p calc-user-parse-table)
 778         (matches nil)
 779         match rule)
 780     (while (and p
 781                 (or (not (progn
 782                            (setq rule (car (car p)))
 783                            (if x
 784                                (and (integerp (car rule))
 785                                     (>= (car rule) prec)
 786                                     (equal exp-data
 787                                            (car (setq rule (cdr rule)))))
 788                              (equal exp-data (car rule)))))
 789                     (let ((save-exp-pos exp-pos)
 790                           (save-exp-old-pos exp-old-pos)
 791                           (save-exp-token exp-token)
 792                           (save-exp-data exp-data))
 793                       (or (not (listp
 794                                 (setq matches (calc-match-user-syntax rule))))
 795                           (let ((args (progn
 796                                         (calc-extensions)
 797                                         calc-arg-values))
 798                                 (conds nil)
 799                                 temp)
 800                             (if x
 801                                 (setq matches (cons x matches)))
 802                             (setq match (cdr (car p)))
 803                             (while (and (eq (car-safe match)
 804                                             'calcFunc-condition)
 805                                         (= (length match) 3))
 806                               (setq conds (append (math-flatten-lands
 807                                                    (nth 2 match))
 808                                                   conds)
 809                                     match (nth 1 match)))
 810                             (while (and conds match)
 811                               (calc-extensions)
 812                               (cond ((eq (car-safe (car conds))
 813                                          'calcFunc-let)
 814                                      (setq temp (car conds))
 815                                      (or (= (length temp) 3)
 816                                          (and (= (length temp) 2)
 817                                               (eq (car-safe (nth 1 temp))
 818                                                   'calcFunc-assign)
 819                                               (= (length (nth 1 temp)) 3)
 820                                               (setq temp (nth 1 temp)))
 821                                          (setq match nil))
 822                                      (setq matches (cons
 823                                                     (math-normalize
 824                                                      (math-multi-subst
 825                                                       (nth 2 temp)
 826                                                       args matches))
 827                                                     matches)
 828                                            args (cons (nth 1 temp)
 829                                                       args)))
 830                                     ((and (eq (car-safe (car conds))
 831                                               'calcFunc-matches)
 832                                           (= (length (car conds)) 3))
 833                                      (setq temp (calcFunc-vmatches
 834                                                  (math-multi-subst
 835                                                   (nth 1 (car conds))
 836                                                   args matches)
 837                                                  (nth 2 (car conds))))
 838                                      (if (eq temp 0)
 839                                          (setq match nil)
 840                                        (while (setq temp (cdr temp))
 841                                          (setq matches (cons (nth 2 (car temp))
 842                                                              matches)
 843                                                args (cons (nth 1 (car temp))
 844                                                           args)))))
 845                                     (t
 846                                      (or (math-is-true (math-simplify
 847                                                         (math-multi-subst
 848                                                          (car conds)
 849                                                          args matches)))
 850                                          (setq match nil))))
 851                               (setq conds (cdr conds)))
 852                             (if match
 853                                 (not (setq match (math-multi-subst
 854                                                   match args matches)))
 855                               (setq exp-old-pos save-exp-old-pos
 856                                     exp-token save-exp-token
 857                                     exp-data save-exp-data
 858                                     exp-pos save-exp-pos)))))))
 859       (setq p (cdr p)))
 860     (and p match)))
 861
 862 (defun calc-match-user-syntax (p &optional term)
 863   (let ((matches nil)
 864         (save-exp-pos exp-pos)
 865         (save-exp-old-pos exp-old-pos)
 866         (save-exp-token exp-token)
 867         (save-exp-data exp-data))
 868     (while (and p
 869                 (cond ((stringp (car p))
 870                        (and (equal exp-data (car p))
 871                             (progn
 872                               (math-read-token)
 873                               t)))
 874                       ((integerp (car p))
 875                        (and (setq m (catch 'syntax
 876                                       (math-read-expr-level
 877                                        (car p)
 878                                        (if (cdr p)
 879                                            (if (consp (nth 1 p))
 880                                                (car (nth 1 (nth 1 p)))
 881                                              (nth 1 p))
 882                                          term))))
 883                             (not (stringp m))
 884                             (setq matches (nconc matches (list m)))))
 885                       ((eq (car (car p)) '\?)
 886                        (setq m (calc-match-user-syntax (nth 1 (car p))))
 887                        (or (nth 2 (car p))
 888                            (setq matches
 889                                  (nconc matches
 890                                         (list
 891                                          (cons 'vec (and (listp m) m))))))
 892                        (or (listp m) (not (nth 2 (car p)))
 893                            (not (eq (aref (car (nth 2 (car p))) 0) ?\$))
 894                            (eq exp-token 'end)))
 895                       (t
 896                        (setq m (calc-match-user-syntax (nth 1 (car p))
 897                                                        (car (nth 2 (car p)))))
 898                        (if (listp m)
 899                            (let ((vec (cons 'vec m))
 900                                  opos mm)
 901                              (while (and (listp
 902                                           (setq opos exp-pos
 903                                                 mm (calc-match-user-syntax
 904                                                     (or (nth 2 (car p))
 905                                                         (nth 1 (car p)))
 906                                                     (car (nth 2 (car p))))))
 907                                          (> exp-pos opos))
 908                                (setq vec (nconc vec mm)))
 909                              (setq matches (nconc matches (list vec))))
 910                          (and (eq (car (car p)) '*)
 911                               (setq matches (nconc matches (list '(vec)))))))))
 912       (setq p (cdr p)))
 913     (if p
 914         (setq exp-pos save-exp-pos
 915               exp-old-pos save-exp-old-pos
 916               exp-token save-exp-token
 917               exp-data save-exp-data
 918               matches "Failed"))
 919     matches))
 920
 921 (defconst math-alg-inequalities
 922   '(calcFunc-lt calcFunc-gt calcFunc-leq calcFunc-geq
 923                 calcFunc-eq calcFunc-neq))
 924
 925 (defun math-remove-dashes (x)
 926   (if (string-match "\\`\\(.*\\)-\\(.*\\)\\'" x)
 927       (math-remove-dashes
 928        (concat (math-match-substring x 1) "#" (math-match-substring x 2)))
 929     x))
 930
 931 (defun math-restore-dashes (x)
 932   (if (string-match "\\`\\(.*\\)[#_]\\(.*\\)\\'" x)
 933       (math-restore-dashes
 934        (concat (math-match-substring x 1) "-" (math-match-substring x 2)))
 935     x))
 936
 937 (defun math-read-if (cond op)
 938   (let ((then (math-read-expr-level 0)))
 939     (or (equal exp-data ":")
 940         (throw 'syntax "Expected ':'"))
 941     (math-read-token)
 942     (list 'calcFunc-if cond then (math-read-expr-level (nth 3 op)))))
 943
 944 (defun math-factor-after ()
 945   (let ((exp-pos exp-pos)
 946         exp-old-pos exp-token exp-data)
 947     (math-read-token)
 948     (or (memq exp-token '(number symbol dollar hash string))
 949         (and (assoc exp-data '(("-") ("+") ("!") ("|") ("/")))
 950              (assoc (concat "u" exp-data) math-expr-opers))
 951         (eq (nth 2 (assoc exp-data math-expr-opers)) -1)
 952         (assoc exp-data '(("(") ("[") ("{"))))))
 953
 954 (defun math-read-factor ()
 955   (let (op)
 956     (cond ((eq exp-token 'number)
 957            (let ((num (math-read-number exp-data)))
 958              (if (not num)
 959                  (progn
 960                    (setq exp-old-pos exp-pos)
 961                    (throw 'syntax "Bad format")))
 962              (math-read-token)
 963              (if (and math-read-expr-quotes
 964                       (consp num))
 965                  (list 'quote num)
 966                num)))
 967           ((and calc-user-parse-table
 968                 (setq op (calc-check-user-syntax)))
 969            op)
 970           ((or (equal exp-data "-")
 971                (equal exp-data "+")
 972                (equal exp-data "!")
 973                (equal exp-data "|")
 974                (equal exp-data "/"))
 975            (setq exp-data (concat "u" exp-data))
 976            (math-read-factor))
 977           ((and (setq op (assoc exp-data math-expr-opers))
 978                 (eq (nth 2 op) -1))
 979            (if (consp (nth 1 op))
 980                (funcall (car (nth 1 op)) op)
 981              (math-read-token)
 982              (let ((val (math-read-expr-level (nth 3 op))))
 983                (cond ((eq (nth 1 op) 'ident)
 984                       val)
 985                      ((and (Math-numberp val)
 986                            (equal (car op) "u-"))
 987                       (math-neg val))
 988                      (t (list (nth 1 op) val))))))
 989           ((eq exp-token 'symbol)
 990            (let ((sym (intern exp-data)))
 991              (math-read-token)
 992              (if (equal exp-data calc-function-open)
 993                  (let ((f (assq sym math-expr-function-mapping)))
 994                    (math-read-token)
 995                    (if (consp (cdr f))
 996                        (funcall (car (cdr f)) f sym)
 997                      (let ((args (if (or (equal exp-data calc-function-close)
 998                                          (eq exp-token 'end))
 999                                      nil
1000                                    (math-read-expr-list))))
1001                        (if (not (or (equal exp-data calc-function-close)
1002                                     (eq exp-token 'end)))
1003                            (throw 'syntax "Expected `)'"))
1004                        (math-read-token)
1005                        (if (and (eq calc-language 'fortran) args
1006                                 (calc-extensions)
1007                                 (let ((calc-matrix-mode 'scalar))
1008                                   (math-known-matrixp
1009                                    (list 'var sym
1010                                          (intern
1011                                           (concat "var-"
1012                                                   (symbol-name sym)))))))
1013                            (math-parse-fortran-subscr sym args)
1014                          (if f
1015                              (setq sym (cdr f))
1016                            (and (= (aref (symbol-name sym) 0) ?\\)
1017                                 (< (prefix-numeric-value calc-language-option)
1018                                    0)
1019                                 (setq sym (intern (substring (symbol-name sym)
1020                                                              1))))
1021                            (or (string-match "-" (symbol-name sym))
1022                                (setq sym (intern
1023                                           (concat "calcFunc-"
1024                                                   (symbol-name sym))))))
1025                          (cons sym args)))))
1026                (if math-read-expr-quotes
1027                    sym
1028                  (let ((val (list 'var
1029                                   (intern (math-remove-dashes
1030                                            (symbol-name sym)))
1031                                   (if (string-match "-" (symbol-name sym))
1032                                       sym
1033                                     (intern (concat "var-"
1034                                                     (symbol-name sym)))))))
1035                    (let ((v (assq (nth 1 val) math-expr-variable-mapping)))
1036                      (and v (setq val (if (consp (cdr v))
1037                                           (funcall (car (cdr v)) v val)
1038                                         (list 'var
1039                                               (intern
1040                                                (substring (symbol-name (cdr v))
1041                                                           4))
1042                                               (cdr v))))))
1043                    (while (and (memq calc-language '(c pascal maple))
1044                                (equal exp-data "["))
1045                      (math-read-token)
1046                      (setq val (append (list 'calcFunc-subscr val)
1047                                        (math-read-expr-list)))
1048                      (if (equal exp-data "]")
1049                          (math-read-token)
1050                        (throw 'syntax "Expected ']'")))
1051                    val)))))
1052           ((eq exp-token 'dollar)
1053            (let ((abs (if (> exp-data 0) exp-data (- exp-data))))
1054              (if (>= (length calc-dollar-values) abs)
1055                  (let ((num exp-data))
1056                    (math-read-token)
1057                    (setq calc-dollar-used (max calc-dollar-used num))
1058                    (math-check-complete (nth (1- abs) calc-dollar-values)))
1059                (throw 'syntax (if calc-dollar-values
1060                                   "Too many $'s"
1061                                 "$'s not allowed in this context")))))
1062           ((eq exp-token 'hash)
1063            (or calc-hashes-used
1064                (throw 'syntax "#'s not allowed in this context"))
1065            (calc-extensions)
1066            (if (<= exp-data (length calc-arg-values))
1067                (let ((num exp-data))
1068                  (math-read-token)
1069                  (setq calc-hashes-used (max calc-hashes-used num))
1070                  (nth (1- num) calc-arg-values))
1071              (throw 'syntax "Too many # arguments")))
1072           ((equal exp-data "(")
1073            (let* ((exp (let ((exp-keep-spaces nil))
1074                          (math-read-token)
1075                          (if (or (equal exp-data "\\dots")
1076                                  (equal exp-data "\\ldots"))
1077                              '(neg (var inf var-inf))
1078                            (math-read-expr-level 0)))))
1079              (let ((exp-keep-spaces nil))
1080                (cond
1081                 ((equal exp-data ",")
1082                  (progn
1083                    (math-read-token)
1084                    (let ((exp2 (math-read-expr-level 0)))
1085                      (setq exp
1086                            (if (and exp2 (Math-realp exp) (Math-realp exp2))
1087                                (math-normalize (list 'cplx exp exp2))
1088                              (list '+ exp (list '* exp2 '(var i var-i))))))))
1089                 ((equal exp-data ";")
1090                  (progn
1091                    (math-read-token)
1092                    (let ((exp2 (math-read-expr-level 0)))
1093                      (setq exp (if (and exp2 (Math-realp exp)
1094                                         (Math-anglep exp2))
1095                                    (math-normalize (list 'polar exp exp2))
1096                                  (calc-extensions)
1097                                  (list '* exp
1098                                        (list 'calcFunc-exp
1099                                              (list '*
1100                                                    (math-to-radians-2 exp2)
1101                                                    '(var i var-i)))))))))
1102                 ((or (equal exp-data "\\dots")
1103                      (equal exp-data "\\ldots"))
1104                  (progn
1105                    (math-read-token)
1106                    (let ((exp2 (if (or (equal exp-data ")")
1107                                        (equal exp-data "]")
1108                                        (eq exp-token 'end))
1109                                    '(var inf var-inf)
1110                                  (math-read-expr-level 0))))
1111                      (setq exp
1112                            (list 'intv
1113                                  (if (equal exp-data ")") 0 1)
1114                                  exp
1115                                  exp2)))))))
1116              (if (not (or (equal exp-data ")")
1117                           (and (equal exp-data "]") (eq (car-safe exp) 'intv))
1118                           (eq exp-token 'end)))
1119                  (throw 'syntax "Expected `)'"))
1120              (math-read-token)
1121              exp))
1122           ((eq exp-token 'string)
1123            (calc-extensions)
1124            (math-read-string))
1125           ((equal exp-data "[")
1126            (calc-extensions)
1127            (math-read-brackets t "]"))
1128           ((equal exp-data "{")
1129            (calc-extensions)
1130            (math-read-brackets nil "}"))
1131           ((equal exp-data "<")
1132            (calc-extensions)
1133            (math-read-angle-brackets))
1134           (t (throw 'syntax "Expected a number")))))
1135
1136 ;;; arch-tag: 5599e45d-e51e-44bb-9a20-9f4ed8c96c32
1137 ;;; calc-aent.el ends here