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861345b4 | 1 | ;;; -*-lisp-*- |
2 | ;;; | |
861345b4 | 3 | ;;; Option parser, standard issue |
4 | ;;; | |
5 | ;;; (c) 2005 Straylight/Edgeware | |
6 | ;;; | |
7 | ||
8 | ;;;----- Licensing notice --------------------------------------------------- | |
9 | ;;; | |
10 | ;;; This program is free software; you can redistribute it and/or modify | |
11 | ;;; it under the terms of the GNU General Public License as published by | |
12 | ;;; the Free Software Foundation; either version 2 of the License, or | |
13 | ;;; (at your option) any later version. | |
b2c12b4e | 14 | ;;; |
861345b4 | 15 | ;;; This program is distributed in the hope that it will be useful, |
16 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;;; GNU General Public License for more details. | |
b2c12b4e | 19 | ;;; |
861345b4 | 20 | ;;; You should have received a copy of the GNU General Public License |
21 | ;;; along with this program; if not, write to the Free Software Foundation, | |
22 | ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | ||
02866e07 MW |
24 | ;;;-------------------------------------------------------------------------- |
25 | ;;; Packages. | |
26 | ||
0b3651e5 | 27 | (defpackage #:optparse |
77f935da | 28 | (:use #:common-lisp #:mdw.base #:mdw.sys-base)) |
861345b4 | 29 | |
0b3651e5 | 30 | (in-package #:optparse) |
861345b4 | 31 | |
77f935da MW |
32 | ;; Re-export symbols from sys-base. |
33 | (export '(exit *program-name* *command-line*)) | |
34 | ||
02866e07 | 35 | ;;;-------------------------------------------------------------------------- |
861345b4 | 36 | ;;; Standard error-reporting functions. |
37 | ||
77f935da | 38 | (export 'moan) |
861345b4 | 39 | (defun moan (msg &rest args) |
40 | "Report an error message in the usual way." | |
41 | (format *error-output* "~&~A: ~?~%" *program-name* msg args)) | |
5fa07b7a | 42 | |
77f935da | 43 | (export 'die) |
861345b4 | 44 | (defun die (&rest args) |
45 | "Report an error message and exit." | |
46 | (apply #'moan args) | |
47 | (exit 1)) | |
48 | ||
02866e07 | 49 | ;;;-------------------------------------------------------------------------- |
861345b4 | 50 | ;;; The main option parser. |
51 | ||
77f935da | 52 | (export '*options*) |
b3bc3745 | 53 | (defvar *options* nil) |
5fa07b7a | 54 | |
77f935da MW |
55 | (export '(option optionp make-option |
56 | opt-short-name opt-long-name opt-tag opt-negated-tag | |
57 | opt-arg-name opt-arg-optional-p opt-documentation)) | |
d977f44b MW |
58 | (defstruct (option |
59 | (:predicate optionp) | |
60 | (:conc-name opt-) | |
61 | (:print-function | |
62 | (lambda (o s k) | |
63 | (declare (ignore k)) | |
64 | (print-unreadable-object (o s :type t) | |
65 | (format s "~@[-~C, ~]~@[--~A~]~ | |
66 | ~*~@[~2:*~:[=~A~;[=~A]~]~]~ | |
67 | ~@[ ~S~]" | |
68 | (opt-short-name o) | |
69 | (opt-long-name o) | |
70 | (opt-arg-optional-p o) | |
71 | (opt-arg-name o) | |
72 | (opt-documentation o))))) | |
73 | (:constructor %make-option) | |
74 | (:constructor make-option | |
75 | (long-name short-name | |
76 | &optional arg-name | |
77 | &key (tag (intern (string-upcase long-name) :keyword)) | |
78 | negated-tag | |
79 | arg-optional-p | |
80 | doc (documentation doc)))) | |
861345b4 | 81 | "Describes a command-line option. Slots: |
82 | ||
0ff9df03 MW |
83 | LONG-NAME The option's long name. If this is null, the `option' is |
84 | just a banner to be printed in the program's help text. | |
861345b4 | 85 | |
0ff9df03 MW |
86 | TAG The value to be returned if this option is encountered. If |
87 | this is a function, instead, the function is called with the | |
88 | option's argument or nil. | |
861345b4 | 89 | |
0ff9df03 MW |
90 | NEGATED-TAG As for TAG, but used if the negated form of the option is |
91 | found. If this is nil (the default), the option cannot be | |
b2c12b4e | 92 | negated. |
861345b4 | 93 | |
0ff9df03 MW |
94 | SHORT-NAME The option's short name. This must be a single character, or |
95 | nil if the option has no short name. | |
861345b4 | 96 | |
0ff9df03 MW |
97 | ARG-NAME The name of the option's argument, a string. If this is nil, |
98 | the option doesn't accept an argument. The name is shown in | |
99 | the help text. | |
861345b4 | 100 | |
0ff9df03 MW |
101 | ARG-OPTIONAL-P |
102 | If non-nil, the option's argument is optional. This is | |
103 | ignored unless ARG-NAME is non-null. | |
861345b4 | 104 | |
0ff9df03 MW |
105 | DOCUMENTATION |
106 | The help text for this option. It is automatically line- | |
107 | wrapped. If nil, the option is omitted from the help | |
108 | text. | |
861345b4 | 109 | |
0ff9df03 | 110 | Usually, one won't use make-option, but use the option macro instead." |
77f935da MW |
111 | (long-name nil :type (or null string) :read-only t) |
112 | (tag nil :type t :read-only t) | |
113 | (negated-tag nil :type t :read-only t) | |
114 | (short-name nil :type (or null character) :read-only t) | |
115 | (arg-name nil :type (or null string) :read-only t) | |
116 | (arg-optional-p nil :type t :read-only t) | |
ba92c444 | 117 | (documentation nil :type (or null string) :read-only t)) |
77f935da MW |
118 | |
119 | (export '(option-parser option-parser-p make-option-parser | |
120 | op-options op-non-option op-long-only-p | |
121 | op-numeric-p op-negated-numeric-p op-negated-p)) | |
d977f44b MW |
122 | (defstruct (option-parser |
123 | (:conc-name op-) | |
124 | (:constructor make-option-parser | |
125 | (&key ((:args argstmp) (cdr *command-line*)) | |
126 | (options *options*) | |
127 | (non-option :skip) | |
128 | ((:numericp numeric-p)) | |
129 | negated-numeric-p | |
130 | long-only-p | |
131 | &aux (args (cons nil argstmp)) | |
132 | (next args) | |
133 | (negated-p (or negated-numeric-p | |
134 | (some #'opt-negated-tag | |
135 | options)))))) | |
861345b4 | 136 | "An option parser object. Slots: |
137 | ||
0ff9df03 | 138 | ARGS The arguments to be parsed. Usually this will be |
5a64d91b | 139 | *command-line*. |
861345b4 | 140 | |
0ff9df03 | 141 | OPTIONS List of option structures describing the acceptable options. |
861345b4 | 142 | |
0ff9df03 MW |
143 | NON-OPTION Behaviour when encountering a non-option argument. The |
144 | default is :skip. Allowable values are: | |
145 | :skip -- pretend that it appeared after the option | |
146 | arguments; this is the default behaviour of GNU getopt | |
147 | :stop -- stop parsing options, leaving the remaining | |
148 | command line unparsed | |
149 | :return -- return :non-option and the argument word | |
861345b4 | 150 | |
0ff9df03 MW |
151 | NUMERIC-P Non-nil tag (as for options) if numeric options (e.g., -43) |
152 | are to be allowed. The default is nil. (Anomaly: the | |
153 | keyword for this argument is :numericp.) | |
861345b4 | 154 | |
0ff9df03 MW |
155 | NEGATED-NUMERIC-P |
156 | Non-nil tag (as for options) if numeric options (e.g., -43) | |
157 | can be negated. This is not the same thing as a negative | |
158 | numeric option! | |
861345b4 | 159 | |
0ff9df03 MW |
160 | LONG-ONLY-P A misnomer inherited from GNU getopt. Whether to allow |
161 | long options to begin with a single dash. Short options are | |
162 | still allowed, and may be cuddled as usual. The default is | |
163 | nil." | |
861345b4 | 164 | (args nil :type list) |
77f935da MW |
165 | (options nil :type list :read-only t) |
166 | (non-option :skip :type (or function (member :skip :stop :return)) | |
167 | :read-only t) | |
861345b4 | 168 | (next nil :type list) |
169 | (short-opt nil :type (or null string)) | |
170 | (short-opt-index 0 :type fixnum) | |
171 | (short-opt-neg-p nil :type t) | |
77f935da MW |
172 | (long-only-p nil :type t :read-only t) |
173 | (numeric-p nil :type t :read-only t) | |
174 | (negated-numeric-p nil :type t :read-only t) | |
ba92c444 | 175 | (negated-p nil :type t :read-only t)) |
861345b4 | 176 | |
77f935da | 177 | (export 'option-parse-error) |
861345b4 | 178 | (define-condition option-parse-error (error simple-condition) |
179 | () | |
0ff9df03 MW |
180 | (:documentation |
181 | "Indicates an error found while parsing options. Probably not that | |
182 | useful.")) | |
861345b4 | 183 | |
184 | (defun option-parse-error (msg &rest args) | |
185 | "Signal an option-parse-error with the given message and arguments." | |
186 | (error (make-condition 'option-parse-error | |
187 | :format-control msg | |
188 | :format-arguments args))) | |
189 | ||
77f935da | 190 | (export 'option-parse-remainder) |
861345b4 | 191 | (defun option-parse-remainder (op) |
192 | "Returns the unparsed remainder of the command line." | |
193 | (cdr (op-args op))) | |
194 | ||
77f935da | 195 | (export 'option-parse-return) |
b3bc3745 MW |
196 | (defun option-parse-return (tag &optional argument) |
197 | "Should be called from an option handler: forces a return from the | |
198 | immediately enclosing `option-parse-next' with the given TAG and | |
199 | ARGUMENT." | |
200 | (throw 'option-parse-return (values tag argument))) | |
201 | ||
77f935da | 202 | (export 'option-parse-next) |
861345b4 | 203 | (defun option-parse-next (op) |
204 | "The main option-parsing function. OP is an option-parser object, | |
0ff9df03 MW |
205 | initialized appropriately. Returns two values, OPT and ARG: OPT is the |
206 | tag of the next option read, and ARG is the argument attached to it, or | |
207 | nil if there was no argument. If there are no more options, returns nil | |
208 | twice. Options whose TAG is a function aren't returned; instead, the tag | |
209 | function is called, with the option argument (or nil) as the only | |
210 | argument. It is safe for tag functions to throw out of option-parse-next, | |
211 | if they desparately need to. (This is the only way to actually get | |
212 | option-parse-next to return a function value, should that be what you | |
b3bc3745 | 213 | want. See `option-parse-return' for a way of doing this.) |
0ff9df03 MW |
214 | |
215 | While option-parse-next is running, there is a restart `skip-option' which | |
216 | moves on to the next option. Error handlers should use this to resume | |
217 | after parsing errors." | |
b3bc3745 MW |
218 | (labels ((ret (opt &optional arg) |
219 | (return-from option-parse-next (values opt arg))) | |
220 | (finished () | |
221 | (setf (op-next op) nil) | |
222 | (ret nil nil)) | |
223 | (peek-arg () | |
224 | (cadr (op-next op))) | |
225 | (more-args-p () | |
226 | (and (op-next op) | |
227 | (cdr (op-next op)))) | |
228 | (skip-arg () | |
229 | (setf (op-next op) (cdr (op-next op)))) | |
230 | (eat-arg () | |
231 | (setf (cdr (op-next op)) (cddr (op-next op)))) | |
232 | (get-arg () | |
233 | (prog1 (peek-arg) (eat-arg))) | |
234 | (process-option (o name negp &key arg argfunc) | |
235 | (cond ((not (opt-arg-name o)) | |
236 | (when arg | |
237 | (option-parse-error | |
238 | "Option `~A' does not accept arguments" | |
239 | name))) | |
240 | (arg) | |
241 | (argfunc | |
242 | (setf arg (funcall argfunc))) | |
243 | ((opt-arg-optional-p o)) | |
244 | ((more-args-p) | |
245 | (setf arg (get-arg))) | |
246 | (t | |
247 | (option-parse-error "Option `~A' requires an argument" | |
d977f44b | 248 | name))) |
b3bc3745 MW |
249 | (let ((how (if negp (opt-negated-tag o) (opt-tag o)))) |
250 | (if (functionp how) | |
251 | (funcall how arg) | |
252 | (ret how arg)))) | |
253 | (process-long-option (arg start negp) | |
254 | (when (and (not negp) | |
255 | (op-negated-p op) | |
256 | (> (length arg) (+ start 3)) | |
257 | (string= arg "no-" | |
258 | :start1 start :end1 (+ start 3))) | |
259 | (incf start 3) | |
260 | (setf negp t)) | |
261 | (let* ((matches nil) | |
262 | (eqpos (position #\= arg :start start)) | |
263 | (len (or eqpos (length arg))) | |
264 | (optname (subseq arg 0 len)) | |
265 | (len-2 (- len start))) | |
266 | (dolist (o (op-options op)) | |
267 | (cond ((or (not (stringp (opt-long-name o))) | |
268 | (and negp (not (opt-negated-tag o))) | |
269 | (< (length (opt-long-name o)) len-2) | |
270 | (string/= optname (opt-long-name o) | |
271 | :start1 start :end2 len-2))) | |
272 | ((= (length (opt-long-name o)) len-2) | |
273 | (setf matches (list o)) | |
274 | (return)) | |
275 | (t | |
276 | (push o matches)))) | |
277 | (cond ((null matches) | |
278 | (option-parse-error "Unknown option `~A'" optname)) | |
279 | ((cdr matches) | |
280 | (option-parse-error | |
544a637d MW |
281 | #.(concatenate 'string |
282 | "Ambiguous long option `~A' -- " | |
283 | "could be any of:" | |
284 | "~{~%~8T--~A~}") | |
b3bc3745 MW |
285 | optname |
286 | (mapcar #'opt-long-name matches)))) | |
287 | (process-option (car matches) | |
288 | optname | |
289 | negp | |
290 | :arg (and eqpos | |
291 | (subseq arg (1+ eqpos))))))) | |
292 | (catch 'option-parse-return | |
293 | (loop | |
294 | (with-simple-restart (skip-option "Skip this bogus option.") | |
295 | (cond | |
296 | ;; | |
297 | ;; We're embroiled in short options: handle them. | |
298 | ((op-short-opt op) | |
299 | (if (>= (op-short-opt-index op) (length (op-short-opt op))) | |
300 | (setf (op-short-opt op) nil) | |
301 | (let* ((str (op-short-opt op)) | |
302 | (i (op-short-opt-index op)) | |
303 | (ch (char str i)) | |
304 | (negp (op-short-opt-neg-p op)) | |
305 | (name (format nil "~C~A" (if negp #\+ #\-) ch)) | |
306 | (o (find ch (op-options op) :key #'opt-short-name))) | |
307 | (incf i) | |
308 | (setf (op-short-opt-index op) i) | |
309 | (when (or (not o) | |
310 | (and negp (not (opt-negated-tag o)))) | |
311 | (option-parse-error "Unknown option `~A'" name)) | |
312 | (process-option o | |
313 | name | |
314 | negp | |
315 | :argfunc | |
316 | (and (< i (length str)) | |
317 | (lambda () | |
318 | (prog1 | |
319 | (subseq str i) | |
320 | (setf (op-short-opt op) | |
321 | nil)))))))) | |
322 | ;; | |
323 | ;; End of the list. Say we've finished. | |
324 | ((not (more-args-p)) | |
325 | (finished)) | |
326 | ;; | |
327 | ;; Process the next option. | |
328 | (t | |
329 | (let ((arg (peek-arg))) | |
330 | (cond | |
331 | ;; | |
332 | ;; Non-option. Decide what to do. | |
333 | ((or (<= (length arg) 1) | |
334 | (and (char/= (char arg 0) #\-) | |
335 | (or (char/= (char arg 0) #\+) | |
336 | (not (op-negated-p op))))) | |
337 | (case (op-non-option op) | |
338 | (:skip (skip-arg)) | |
339 | (:stop (finished)) | |
340 | (:return (eat-arg) | |
341 | (ret :non-option arg)) | |
342 | (t (eat-arg) | |
343 | (funcall (op-non-option op) arg)))) | |
344 | ;; | |
345 | ;; Double-hyphen. Stop right now. | |
346 | ((string= arg "--") | |
347 | (eat-arg) | |
348 | (finished)) | |
349 | ;; | |
350 | ;; Numbers. Check these before long options, since `--43' | |
351 | ;; is not a long option. | |
352 | ((and (op-numeric-p op) | |
353 | (or (char= (char arg 0) #\-) | |
354 | (op-negated-numeric-p op)) | |
355 | (or (and (digit-char-p (char arg 1)) | |
356 | (every #'digit-char-p (subseq arg 2))) | |
357 | (and (or (char= (char arg 1) #\-) | |
358 | (char= (char arg 1) #\+)) | |
359 | (>= (length arg) 3) | |
360 | (digit-char-p (char arg 2)) | |
361 | (every #'digit-char-p (subseq arg 3))))) | |
362 | (eat-arg) | |
363 | (let ((negp (char= (char arg 0) #\+)) | |
364 | (num (parse-integer arg :start 1))) | |
365 | (when (and negp (eq (op-negated-numeric-p op) :-)) | |
366 | (setf num (- num)) | |
367 | (setf negp nil)) | |
368 | (let ((how (if negp | |
369 | (op-negated-numeric-p op) | |
370 | (op-numeric-p op)))) | |
371 | (if (functionp how) | |
372 | (funcall how num) | |
373 | (ret (if negp :negated-numeric :numeric) num))))) | |
374 | ;; | |
375 | ;; Long option. Find the matching option-spec and process | |
376 | ;; it. | |
377 | ((and (char= (char arg 0) #\-) | |
378 | (char= (char arg 1) #\-)) | |
379 | (eat-arg) | |
380 | (process-long-option arg 2 nil)) | |
381 | ;; | |
382 | ;; Short options. All that's left. | |
383 | (t | |
384 | (eat-arg) | |
385 | (let ((negp (char= (char arg 0) #\+)) | |
386 | (ch (char arg 1))) | |
387 | (cond ((and (op-long-only-p op) | |
388 | (not (member ch (op-options op) | |
389 | :key #'opt-short-name))) | |
390 | (process-long-option arg 1 negp)) | |
391 | (t | |
392 | (setf (op-short-opt op) arg | |
393 | (op-short-opt-index op) 1 | |
394 | (op-short-opt-neg-p op) negp)))))))))))))) | |
861345b4 | 395 | |
77f935da | 396 | (export 'option-parse-try) |
861345b4 | 397 | (defmacro option-parse-try (&body body) |
398 | "Report errors encountered while parsing options, and continue struggling | |
0ff9df03 MW |
399 | along. Also establishes a restart `stop-parsing'. Returns t if parsing |
400 | completed successfully, or nil if errors occurred." | |
861345b4 | 401 | (with-gensyms (retcode) |
402 | `(let ((,retcode t)) | |
403 | (restart-case | |
404 | (handler-bind | |
405 | ((option-parse-error | |
406 | (lambda (cond) | |
407 | (setf ,retcode nil) | |
408 | (moan "~A" cond) | |
409 | (dolist (rn '(skip-option stop-parsing)) | |
410 | (let ((r (find-restart rn))) | |
411 | (when r (invoke-restart r))))))) | |
412 | ,@body) | |
413 | (stop-parsing () | |
414 | :report "Give up parsing options." | |
415 | (setf ,retcode nil))) | |
416 | ,retcode))) | |
417 | ||
77f935da | 418 | (export 'with-unix-error-reporting) |
861345b4 | 419 | (defmacro with-unix-error-reporting ((&key) &body body) |
420 | "Evaluate BODY with errors reported in the standard Unix fashion." | |
421 | (with-gensyms (cond) | |
422 | `(handler-case | |
423 | (progn ,@body) | |
424 | (simple-condition (,cond) | |
5fa07b7a | 425 | (apply #'die |
4da88bb9 MW |
426 | (simple-condition-format-control ,cond) |
427 | (simple-condition-format-arguments ,cond))) | |
861345b4 | 428 | (error (,cond) |
429 | (die "~A" ,cond))))) | |
430 | ||
02866e07 | 431 | ;;;-------------------------------------------------------------------------- |
861345b4 | 432 | ;;; Standard option handlers. |
433 | ||
77f935da | 434 | (export 'defopthandler) |
861345b4 | 435 | (defmacro defopthandler (name (var &optional (arg (gensym))) |
436 | (&rest args) | |
437 | &body body) | |
438 | "Define an option handler function NAME. Option handlers update a | |
0ff9df03 MW |
439 | generalized variable, which may be referred to as VAR in the BODY, based |
440 | on some parameters (the ARGS) and the value of an option-argument named | |
441 | ARG." | |
861345b4 | 442 | (let ((func (intern (format nil "OPTHANDLER/~:@(~A~)" name)))) |
8f801ae8 | 443 | (with-parsed-body (body decls docs) body |
2c13c1cd MW |
444 | `(progn |
445 | (setf (get ',name 'opthandler) ',func) | |
446 | (defun ,func (,var ,arg ,@args) | |
447 | ,@docs ,@decls | |
570ab748 | 448 | (declare (ignorable ,arg)) |
2c13c1cd | 449 | (with-locatives ,var |
2c13c1cd MW |
450 | ,@body)) |
451 | ',name)))) | |
861345b4 | 452 | |
453 | (defun parse-c-integer (string &key radix (start 0) end) | |
454 | "Parse STRING, or at least the parts of it between START and END, according | |
0ff9df03 MW |
455 | to the standard C rules. Well, almost: the 0 and 0x prefixes are |
456 | accepted, but so too are 0o (Haskell) and 0b (original); also RADIX_DIGITS | |
457 | is accepted, for any radix between 2 and 36. Prefixes are only accepted | |
458 | if RADIX is nil. Returns two values: the integer parsed (or nil if there | |
459 | wasn't enough for a sensible parse), and the index following the | |
460 | characters of the integer." | |
2af61873 | 461 | (setf-default end (length string)) |
202c91a3 MW |
462 | (labels ((simple (i r goodp sgn) |
463 | (multiple-value-bind | |
464 | (a i) | |
465 | (if (and (< i end) | |
466 | (digit-char-p (char string i) r)) | |
467 | (parse-integer string | |
468 | :start i :end end | |
469 | :radix r | |
470 | :junk-allowed t) | |
471 | (values nil i)) | |
472 | (values (if a (* sgn a) (and goodp 0)) i))) | |
861345b4 | 473 | (get-radix (i r sgn) |
202c91a3 | 474 | (cond (r (simple i r nil sgn)) |
861345b4 | 475 | ((>= i end) (values nil i)) |
476 | ((and (char= (char string i) #\0) | |
477 | (>= (- end i) 2)) | |
478 | (case (char string (1+ i)) | |
202c91a3 MW |
479 | (#\x (simple (+ i 2) 16 nil sgn)) |
480 | (#\o (simple (+ i 2) 8 nil sgn)) | |
481 | (#\b (simple (+ i 2) 2 nil sgn)) | |
482 | (t (simple (1+ i) 8 t sgn)))) | |
861345b4 | 483 | (t |
484 | (multiple-value-bind | |
202c91a3 MW |
485 | (r i) |
486 | (simple i 10 nil +1) | |
861345b4 | 487 | (cond ((not r) (values nil i)) |
488 | ((and (< i end) | |
489 | (char= (char string i) #\_) | |
490 | (<= 2 r 36)) | |
202c91a3 | 491 | (simple (1+ i) r nil sgn)) |
861345b4 | 492 | (t |
493 | (values (* r sgn) i)))))))) | |
494 | (cond ((>= start end) (values nil start)) | |
495 | ((char= (char string start) #\-) | |
496 | (get-radix (1+ start) radix -1)) | |
497 | ((char= (char string start) #\+) | |
498 | (get-radix (1+ start) radix +1)) | |
499 | (t | |
500 | (get-radix start radix +1))))) | |
501 | ||
77f935da | 502 | (export 'invoke-option-handler) |
861345b4 | 503 | (defun invoke-option-handler (handler loc arg args) |
504 | "Call the HANDLER function, giving it LOC to update, the option-argument | |
0ff9df03 | 505 | ARG, and the remaining ARGS." |
861345b4 | 506 | (apply (if (functionp handler) handler |
507 | (fdefinition (get handler 'opthandler))) | |
508 | loc | |
509 | arg | |
510 | args)) | |
511 | ||
5fa07b7a MW |
512 | ;;;-------------------------------------------------------------------------- |
513 | ;;; Built-in option handlers. | |
514 | ||
77f935da | 515 | (export 'set) |
861345b4 | 516 | (defopthandler set (var) (&optional (value t)) |
517 | "Sets VAR to VALUE; defaults to t." | |
518 | (setf var value)) | |
5fa07b7a | 519 | |
77f935da | 520 | (export 'clear) |
861345b4 | 521 | (defopthandler clear (var) (&optional (value nil)) |
522 | "Sets VAR to VALUE; defaults to nil." | |
523 | (setf var value)) | |
5fa07b7a | 524 | |
77f935da | 525 | (export 'inc) |
861345b4 | 526 | (defopthandler inc (var) (&optional max (step 1)) |
527 | "Increments VAR by STEP (defaults to 1), but not greater than MAX (default | |
0ff9df03 | 528 | nil for no maximum). No errors are signalled." |
861345b4 | 529 | (incf var step) |
530 | (when (>= var max) | |
531 | (setf var max))) | |
5fa07b7a | 532 | |
77f935da | 533 | (export 'dec) |
861345b4 | 534 | (defopthandler dec (var) (&optional min (step 1)) |
535 | "Decrements VAR by STEP (defaults to 1), but not less than MIN (default nil | |
0ff9df03 | 536 | for no maximum). No errors are signalled." |
861345b4 | 537 | (decf var step) |
538 | (when (<= var min) | |
539 | (setf var min))) | |
5fa07b7a | 540 | |
77f935da | 541 | (export 'read) |
861345b4 | 542 | (defopthandler read (var arg) () |
543 | "Stores in VAR the Lisp object found by reading the ARG. Evaluation is | |
0ff9df03 MW |
544 | forbidden while reading ARG. If there is an error during reading, an |
545 | error of type option-parse-error is signalled." | |
861345b4 | 546 | (handler-case |
547 | (let ((*read-eval* nil)) | |
548 | (multiple-value-bind (x end) (read-from-string arg t) | |
549 | (unless (>= end (length arg)) | |
550 | (option-parse-error "Junk at end of argument `~A'" arg)) | |
551 | (setf var x))) | |
552 | (error (cond) | |
553 | (option-parse-error (format nil "~A" cond))))) | |
5fa07b7a | 554 | |
77f935da | 555 | (export 'int) |
861345b4 | 556 | (defopthandler int (var arg) (&key radix min max) |
557 | "Stores in VAR the integer read from the ARG. Integers are parsed | |
0ff9df03 MW |
558 | according to C rules, which is normal in Unix; the RADIX may be nil to |
559 | allow radix prefixes, or an integer between 2 and 36. An | |
560 | option-parse-error is signalled if the ARG is not a valid integer, or if | |
561 | it is not between MIN and MAX (either of which may be nil if no lower | |
562 | resp. upper bound is wanted)." | |
861345b4 | 563 | (multiple-value-bind (v end) (parse-c-integer arg :radix radix) |
564 | (unless (and v (>= end (length arg))) | |
565 | (option-parse-error "Bad integer `~A'" arg)) | |
566 | (when (or (and min (< v min)) | |
567 | (and max (> v max))) | |
568 | (option-parse-error | |
544a637d MW |
569 | #.(concatenate 'string |
570 | "Integer ~A out of range " | |
571 | "(must have ~@[~D <= ~]x~@[ <= ~D~])") | |
861345b4 | 572 | arg min max)) |
573 | (setf var v))) | |
5fa07b7a | 574 | |
77f935da | 575 | (export 'string) |
861345b4 | 576 | (defopthandler string (var arg) () |
577 | "Stores ARG in VAR, just as it is." | |
578 | (setf var arg)) | |
5fa07b7a | 579 | |
77f935da | 580 | (export 'keyword) |
a8bbb2e7 MW |
581 | (defopthandler keyword (var arg) (&optional (valid t)) |
582 | "Converts ARG into a keyword. If VALID is t, then any ARG string is | |
583 | acceptable: the argument is uppercased and interned in the keyword | |
584 | package. If VALID is a list, then we ensure that ARG matches one of the | |
585 | elements of the list; unambigious abbreviations are allowed." | |
586 | (etypecase valid | |
587 | ((member t) | |
588 | (setf var (intern (string-upcase arg) :keyword))) | |
589 | (list | |
590 | (let ((matches nil) | |
591 | (guess (string-upcase arg)) | |
592 | (len (length arg))) | |
593 | (dolist (k valid) | |
594 | (let* ((kn (symbol-name k)) | |
595 | (klen (length kn))) | |
596 | (cond ((string= kn guess) | |
597 | (setf matches (list k)) | |
598 | (return)) | |
599 | ((and (< len klen) | |
600 | (string= guess kn :end2 len)) | |
601 | (push k matches))))) | |
602 | (cond | |
603 | ((null matches) | |
544a637d MW |
604 | (option-parse-error #.(concatenate 'string |
605 | "Argument `~A' invalid: " | |
606 | "must be one of:" | |
607 | "~{~%~8T~(~A~)~}") | |
a8bbb2e7 MW |
608 | arg valid)) |
609 | ((null (cdr matches)) | |
610 | (setf var (car matches))) | |
611 | (t | |
544a637d MW |
612 | (option-parse-error #.(concatenate 'string |
613 | "Argument `~A' ambiguous: " | |
614 | "may be any of:" | |
615 | "~{~%~8T~(~A~)~}") | |
a8bbb2e7 | 616 | arg matches))))))) |
5fa07b7a | 617 | |
77f935da | 618 | (export 'list) |
861345b4 | 619 | (defopthandler list (var arg) (&optional handler &rest handler-args) |
620 | "Collect ARGs in a list at VAR. ARGs are translated by the HANDLER first, | |
0ff9df03 | 621 | if specified. If not, it's as if you asked for `string'." |
861345b4 | 622 | (when handler |
623 | (invoke-option-handler handler (locf arg) arg handler-args)) | |
624 | (setf var (nconc var (list arg)))) | |
625 | ||
5fa07b7a MW |
626 | ;;;-------------------------------------------------------------------------- |
627 | ;;; Option descriptions. | |
628 | ||
77f935da | 629 | (export 'defoptmacro) |
5fa07b7a MW |
630 | (defmacro defoptmacro (name args &body body) |
631 | "Defines an option macro NAME. Option macros should produce a list of | |
0ff9df03 | 632 | expressions producing one option structure each." |
5fa07b7a MW |
633 | `(progn |
634 | (setf (get ',name 'optmacro) (lambda ,args ,@body)) | |
635 | ',name)) | |
636 | ||
77f935da | 637 | (export 'parse-option-form) |
861345b4 | 638 | (compile-time-defun parse-option-form (form) |
639 | "Does the heavy lifting for parsing an option form. See the docstring for | |
0ff9df03 | 640 | the `option' macro for details of the syntax." |
861345b4 | 641 | (flet ((doc (form) |
642 | (cond ((stringp form) form) | |
643 | ((null (cdr form)) (car form)) | |
644 | (t `(format nil ,@form)))) | |
645 | (docp (form) | |
646 | (or (stringp form) | |
647 | (and (consp form) | |
648 | (stringp (car form)))))) | |
5fa07b7a MW |
649 | (cond ((stringp form) |
650 | `(%make-option :documentation ,form)) | |
651 | ((not (listp form)) | |
652 | (error "option form must be string or list")) | |
653 | ((and (docp (car form)) (null (cdr form))) | |
654 | `(%make-option :documentation ,(doc (car form)))) | |
655 | (t | |
656 | (let (long-name short-name | |
657 | arg-name arg-optional-p | |
658 | tag negated-tag | |
659 | doc) | |
660 | (dolist (f form) | |
661 | (cond ((and (or (not tag) (not negated-tag)) | |
662 | (or (keywordp f) | |
663 | (and (consp f) | |
664 | (member (car f) '(lambda function))))) | |
665 | (if tag | |
666 | (setf negated-tag f) | |
667 | (setf tag f))) | |
668 | ((and (not long-name) | |
669 | (or (rationalp f) | |
670 | (symbolp f) | |
671 | (stringp f))) | |
672 | (setf long-name (if (stringp f) f | |
673 | (format nil "~(~A~)" f)))) | |
674 | ((and (not short-name) | |
675 | (characterp f)) | |
676 | (setf short-name f)) | |
677 | ((and (not doc) | |
678 | (docp f)) | |
679 | (setf doc (doc f))) | |
680 | ((and (consp f) (symbolp (car f))) | |
681 | (case (car f) | |
b3bc3745 MW |
682 | (:short-name (setf short-name (cadr f))) |
683 | (:long-name (setf long-name (cadr f))) | |
684 | (:tag (setf tag (cadr f))) | |
685 | (:negated-tag (setf negated-tag (cadr f))) | |
5fa07b7a MW |
686 | (:arg (setf arg-name (cadr f))) |
687 | (:opt-arg (setf arg-name (cadr f)) | |
688 | (setf arg-optional-p t)) | |
689 | (:doc (setf doc (doc (cdr f)))) | |
690 | (t (let ((handler (get (car f) 'opthandler))) | |
691 | (unless handler | |
692 | (error "No handler `~S' defined." (car f))) | |
693 | (let* ((var (cadr f)) | |
694 | (arg (gensym)) | |
695 | (thunk `#'(lambda (,arg) | |
696 | (,handler (locf ,var) | |
697 | ,arg | |
698 | ,@(cddr f))))) | |
699 | (if tag | |
700 | (setf negated-tag thunk) | |
701 | (setf tag thunk))))))) | |
702 | (t | |
703 | (error "Unexpected thing ~S in option form." f)))) | |
704 | `(make-option ,long-name ,short-name ,arg-name | |
d977f44b MW |
705 | ,@(and arg-optional-p `(:arg-optional-p t)) |
706 | ,@(and tag `(:tag ,tag)) | |
707 | ,@(and negated-tag `(:negated-tag ,negated-tag)) | |
708 | ,@(and doc `(:documentation ,doc)))))))) | |
861345b4 | 709 | |
77f935da | 710 | (export 'options) |
861345b4 | 711 | (defmacro options (&rest optlist) |
712 | "More convenient way of initializing options. The OPTLIST is a list of | |
0ff9df03 | 713 | OPTFORMS. Each OPTFORM is one of the following: |
5fa07b7a | 714 | |
0ff9df03 | 715 | STRING A banner to print. |
5fa07b7a | 716 | |
0ff9df03 | 717 | SYMBOL or (SYMBOL STUFF...) |
b2c12b4e | 718 | If SYMBOL is an optform macro, the result of invoking it. |
5fa07b7a | 719 | |
0ff9df03 | 720 | (...) A full option-form. See below. |
5fa07b7a | 721 | |
b3bc3745 MW |
722 | Full option-forms are a list of the following kinds of items. |
723 | ||
724 | (:short-name CHAR) | |
725 | (:long-name STRING) | |
726 | (:arg STRING) | |
727 | (:tag TAG) | |
728 | (:negated-tag TAG) | |
729 | (:doc STRING) | |
730 | Set the appropriate slot of the option to the given value. | |
731 | The argument is evaluated. | |
861345b4 | 732 | |
b3bc3745 MW |
733 | (:doc FORMAT-CONTROL ARGUMENTS...) |
734 | As for (:doc (format nil FORMAT-CONTROL ARGUMENTS...)). | |
735 | ||
736 | KEYWORD, (function ...), (lambda ...) | |
0ff9df03 MW |
737 | If no TAG is set yet, then as a TAG; otherwise as the |
738 | NEGATED-TAG. | |
861345b4 | 739 | |
0ff9df03 MW |
740 | STRING (or SYMBOL or RATIONAL) |
741 | If no LONG-NAME seen yet, then the LONG-NAME. For symbols | |
742 | and rationals, the item is converted to a string and squashed | |
743 | to lower-case. | |
861345b4 | 744 | |
b3bc3745 | 745 | CHARACTER If no SHORT-NAME, then the SHORT-NAME. |
861345b4 | 746 | |
0ff9df03 MW |
747 | STRING or (STRING STUFF...) |
748 | If no DOCUMENTATION set yet, then the DOCUMENTATION string, | |
b3bc3745 | 749 | as for (:doc STRING STUFF...) |
861345b4 | 750 | |
b3bc3745 | 751 | (:opt-arg NAME) |
0ff9df03 | 752 | Set the ARG-NAME, and also set ARG-OPTIONAL-P. |
861345b4 | 753 | |
0ff9df03 MW |
754 | (HANDLER VAR ARGS...) |
755 | If no TAG is set yet, attach the HANDLER to this option, | |
756 | giving it ARGS. Otherwise, set the NEGATED-TAG." | |
b3bc3745 | 757 | |
5fa07b7a MW |
758 | `(list ,@(mapcan (lambda (form) |
759 | (multiple-value-bind | |
760 | (sym args) | |
761 | (cond ((symbolp form) (values form nil)) | |
762 | ((and (consp form) (symbolp (car form))) | |
763 | (values (car form) (cdr form))) | |
764 | (t (values nil nil))) | |
765 | (let ((macro (and sym (get sym 'optmacro)))) | |
766 | (if macro | |
767 | (apply macro args) | |
768 | (list (parse-option-form form)))))) | |
861345b4 | 769 | optlist))) |
770 | ||
02866e07 | 771 | ;;;-------------------------------------------------------------------------- |
5fa07b7a | 772 | ;;; Support stuff for help and usage messages. |
861345b4 | 773 | |
774 | (defun print-text (string | |
775 | &optional | |
776 | (stream *standard-output*) | |
777 | &key | |
778 | (start 0) | |
779 | (end nil)) | |
780 | "Prints STRING to a pretty-printed STREAM, breaking it at whitespace and | |
0ff9df03 MW |
781 | newlines in the obvious way. Stuff between square brackets is not broken: |
782 | this makes usage messages work better." | |
861345b4 | 783 | (let ((i start) |
784 | (nest 0) | |
785 | (splitp nil)) | |
786 | (flet ((emit () | |
787 | (write-string string stream :start start :end i) | |
788 | (setf start i))) | |
2af61873 | 789 | (setf-default end (length string)) |
861345b4 | 790 | (loop |
791 | (unless (< i end) | |
792 | (emit) | |
793 | (return)) | |
794 | (let ((ch (char string i))) | |
795 | (cond ((char= ch #\newline) | |
796 | (emit) | |
797 | (incf start) | |
798 | (pprint-newline :mandatory stream)) | |
799 | ((whitespace-char-p ch) | |
800 | (when (zerop nest) | |
801 | (setf splitp t))) | |
802 | (t | |
803 | (when splitp | |
804 | (emit) | |
805 | (pprint-newline :fill stream)) | |
806 | (setf splitp nil) | |
807 | (case ch | |
808 | (#\[ (incf nest)) | |
809 | (#\] (when (plusp nest) (decf nest)))))) | |
810 | (incf i)))))) | |
811 | ||
77f935da | 812 | (export 'simple-usage) |
861345b4 | 813 | (defun simple-usage (opts &optional mandatory-args) |
814 | "Build a simple usage list from a list of options, and (optionally) | |
0ff9df03 | 815 | mandatory argument names." |
861345b4 | 816 | (let (short-simple long-simple short-arg long-arg) |
817 | (dolist (o opts) | |
818 | (cond ((not (and (opt-documentation o) | |
819 | (opt-long-name o)))) | |
820 | ((and (opt-short-name o) (opt-arg-name o)) | |
821 | (push o short-arg)) | |
822 | ((opt-short-name o) | |
823 | (push o short-simple)) | |
824 | ((opt-arg-name o) | |
825 | (push o long-arg)) | |
826 | (t | |
827 | (push o long-simple)))) | |
828 | (list | |
829 | (nconc (and short-simple | |
830 | (list (format nil "[-~{~C~}]" | |
831 | (sort (mapcar #'opt-short-name short-simple) | |
832 | #'char<)))) | |
833 | (and long-simple | |
834 | (mapcar (lambda (o) | |
835 | (format nil "[--~A]" (opt-long-name o))) | |
836 | (sort long-simple #'string< :key #'opt-long-name))) | |
837 | (and short-arg | |
838 | (mapcar (lambda (o) | |
839 | (format nil "~:[[-~C ~A]~;[-~C[~A]]~]" | |
840 | (opt-arg-optional-p o) | |
841 | (opt-short-name o) | |
842 | (opt-arg-name o))) | |
843 | (sort short-arg #'char-lessp | |
844 | :key #'opt-short-name))) | |
845 | (and long-arg | |
846 | (mapcar (lambda (o) | |
847 | (format nil "~:[[--~A ~A]~;[--~A[=~A]]~]" | |
848 | (opt-arg-optional-p o) | |
849 | (opt-long-name o) | |
850 | (opt-arg-name o))) | |
851 | (sort long-arg #'string-lessp | |
852 | :key #'opt-long-name))) | |
853 | (listify mandatory-args))))) | |
854 | ||
77f935da | 855 | (export 'show-usage) |
861345b4 | 856 | (defun show-usage (prog usage &optional (stream *standard-output*)) |
5fa07b7a | 857 | "Basic usage-showing function. PROG is the program name, probably from |
5a64d91b MW |
858 | *command-line*. USAGE is a list of possible usages of the program, each |
859 | of which is a list of items to be supplied by the user. In simple cases, | |
860 | a single string is sufficient." | |
861345b4 | 861 | (pprint-logical-block (stream nil :prefix "Usage: ") |
862 | (dolist (u (listify usage)) | |
89663cc1 MW |
863 | (pprint-logical-block (stream nil |
864 | :prefix (concatenate 'string prog " ")) | |
3dba250d MW |
865 | (format stream "~{~A~^ ~:_~}" (listify u))))) |
866 | (terpri stream)) | |
861345b4 | 867 | |
7f853a8a MW |
868 | (defun show-options-help (opts &optional (stream *standard-output*)) |
869 | "Write help for OPTS to the STREAM. This is the core of the `show-help' | |
870 | function." | |
861345b4 | 871 | (let (newlinep) |
872 | (dolist (o opts) | |
873 | (let ((doc (opt-documentation o))) | |
874 | (cond ((not o)) | |
875 | ((not (opt-long-name o)) | |
876 | (when newlinep | |
877 | (terpri stream) | |
878 | (setf newlinep nil)) | |
879 | (pprint-logical-block (stream nil) | |
880 | (print-text doc stream)) | |
881 | (terpri stream)) | |
882 | (t | |
883 | (setf newlinep t) | |
884 | (pprint-logical-block (stream nil :prefix " ") | |
861345b4 | 885 | (format stream "~:[ ~;-~:*~C,~] --~A" |
886 | (opt-short-name o) | |
887 | (opt-long-name o)) | |
888 | (when (opt-arg-name o) | |
889 | (format stream "~:[=~A~;[=~A]~]" | |
890 | (opt-arg-optional-p o) | |
891 | (opt-arg-name o))) | |
892 | (write-string " " stream) | |
893 | (pprint-tab :line 30 1 stream) | |
89663cc1 | 894 | (pprint-indent :block 30 stream) |
861345b4 | 895 | (print-text doc stream)) |
896 | (terpri stream))))))) | |
897 | ||
77f935da | 898 | (export 'show-help) |
7f853a8a MW |
899 | (defun show-help (prog ver usage opts &optional (stream *standard-output*)) |
900 | "Basic help-showing function. PROG is the program name, probably from | |
5a64d91b MW |
901 | *command-line*. VER is the program's version number. USAGE is a list of |
902 | the possible usages of the program, each of which may be a list of items | |
903 | to be supplied. OPTS is the list of supported options, as provided to the | |
904 | options parser. STREAM is the stream to write on." | |
7f853a8a MW |
905 | (format stream "~A, version ~A~2%" prog ver) |
906 | (show-usage prog usage stream) | |
907 | (terpri stream) | |
908 | (show-options-help opts stream)) | |
909 | ||
77f935da | 910 | (export 'sanity-check-options-list) |
861345b4 | 911 | (defun sanity-check-option-list (opts) |
912 | "Check the option list OPTS for basic sanity. Reused short and long option | |
0ff9df03 MW |
913 | names are diagnosed. Maybe other problems will be reported later. |
914 | Returns a list of warning strings." | |
861345b4 | 915 | (let ((problems nil) |
916 | (longs (make-hash-table :test #'equal)) | |
917 | (shorts (make-hash-table))) | |
918 | (flet ((problem (msg &rest args) | |
919 | (push (apply #'format nil msg args) problems))) | |
920 | (dolist (o opts) | |
921 | (push o (gethash (opt-long-name o) longs)) | |
922 | (push o (gethash (opt-short-name o) shorts))) | |
923 | (maphash (lambda (k v) | |
924 | (when (and k (cdr v)) | |
925 | (problem "Long name `--~A' reused in ~S" k v))) | |
926 | longs) | |
927 | (maphash (lambda (k v) | |
928 | (when (and k (cdr v)) | |
929 | (problem "Short name `-~C' reused in ~S" k v))) | |
930 | shorts) | |
931 | problems))) | |
932 | ||
5fa07b7a MW |
933 | ;;;-------------------------------------------------------------------------- |
934 | ;;; Full program descriptions. | |
935 | ||
77f935da | 936 | (export '(*help* *version* *usage)) |
b3bc3745 MW |
937 | (defvar *help* nil) |
938 | (defvar *version* "<unreleased>") | |
939 | (defvar *usage* nil) | |
940 | ||
77f935da | 941 | (export 'do-usage) |
b3bc3745 MW |
942 | (defun do-usage (&optional (stream *standard-output*)) |
943 | (show-usage *program-name* *usage* stream)) | |
944 | ||
77f935da | 945 | (export 'die-usage) |
b3bc3745 MW |
946 | (defun die-usage () |
947 | (do-usage *error-output*) | |
948 | (exit 1)) | |
5fa07b7a MW |
949 | |
950 | (defun opt-help (arg) | |
951 | (declare (ignore arg)) | |
952 | (show-help *program-name* *version* *usage* *options*) | |
953 | (typecase *help* | |
954 | (string (terpri) (write-string *help*)) | |
7f853a8a | 955 | (null nil) |
5fa07b7a MW |
956 | ((or function symbol) (terpri) (funcall *help*))) |
957 | (format t "~&") | |
958 | (exit 0)) | |
5fa07b7a MW |
959 | (defun opt-version (arg) |
960 | (declare (ignore arg)) | |
961 | (format t "~A, version ~A~%" *program-name* *version*) | |
962 | (exit 0)) | |
5fa07b7a MW |
963 | (defun opt-usage (arg) |
964 | (declare (ignore arg)) | |
965 | (do-usage) | |
966 | (exit 0)) | |
967 | ||
77f935da | 968 | (export 'help-options) |
b3bc3745 MW |
969 | (defoptmacro help-options (&key (short-help #\h) |
970 | (short-version #\v) | |
971 | (short-usage #\u)) | |
972 | "Inserts a standard help options collection in an options list." | |
973 | (flet ((shortform (char) | |
974 | (and char (list char)))) | |
975 | (mapcar | |
976 | #'parse-option-form | |
977 | `("Help options" | |
978 | (,@(shortform short-help) "help" #'opt-help | |
979 | "Show this help message.") | |
980 | (,@(shortform short-version) "version" #'opt-version | |
981 | ("Show ~A's version number." *program-name*)) | |
982 | (,@(shortform short-usage) "usage" #'opt-usage | |
983 | ("Show a very brief usage summary for ~A." *program-name*)))))) | |
5fa07b7a | 984 | |
77f935da | 985 | (export 'define-program) |
5fa07b7a | 986 | (defun define-program (&key |
b3bc3745 MW |
987 | (program-name nil progp) |
988 | (help nil helpp) | |
989 | (version nil versionp) | |
990 | (usage nil usagep) | |
991 | (full-usage nil fullp) | |
992 | (options nil optsp)) | |
5fa07b7a | 993 | "Sets up all the required things a program needs to have to parse options |
0ff9df03 | 994 | and respond to them properly." |
b3bc3745 MW |
995 | (when progp (setf *program-name* program-name)) |
996 | (when helpp (setf *help* help)) | |
997 | (when versionp (setf *version* version)) | |
998 | (when optsp (setf *options* options)) | |
999 | (cond ((and usagep fullp) (error "conflicting options")) | |
1000 | (usagep (setf *usage* (simple-usage *options* usage))) | |
1001 | (fullp (setf *usage* full-usage)))) | |
1002 | ||
77f935da | 1003 | (export 'do-options) |
b3bc3745 MW |
1004 | (defmacro do-options ((&key (parser '(make-option-parser))) |
1005 | &body clauses) | |
0ff9df03 MW |
1006 | "Handy all-in-one options parser macro. PARSER defaults to a new options |
1007 | parser using the preset default options structure. The CLAUSES are | |
1008 | `case2'-like clauses to match options, and must be exhaustive. If there | |
1009 | is a clause (nil (REST) FORMS...) then the FORMS are evaluated after | |
1010 | parsing is done with REST bound to the remaining command-line arguments." | |
b3bc3745 MW |
1011 | (let*/gensyms (parser) |
1012 | `(progn | |
560e1186 MW |
1013 | (loop |
1014 | (,(if (find t clauses :key #'car) 'case2 'ecase2) | |
b3bc3745 | 1015 | (option-parse-next ,parser) |
560e1186 MW |
1016 | ((nil) () (return)) |
1017 | ,@(remove-if #'null clauses :key #'car))) | |
1018 | ,@(let ((tail (find nil clauses :key #'car))) | |
1019 | (and tail | |
1020 | (destructuring-bind ((&optional arg) &rest forms) (cdr tail) | |
1021 | (if arg | |
b3bc3745 MW |
1022 | (list `(let ((,arg (option-parse-remainder ,parser))) |
1023 | ,@forms)) | |
560e1186 | 1024 | forms))))))) |
5fa07b7a | 1025 | |
861345b4 | 1026 | ;;;----- That's all, folks -------------------------------------------------- |