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