Add copyright, clean up parser.scm

diff --git a/mudsync/parser.scm b/mudsync/parser.scm
index fb88210a41ed67052ceba5818b7048287169ef01..51e07c899b888d1bb89e9cd9036489d30002a3cc 100644 (file)
--- a/mudsync/parser.scm
+++ b/mudsync/parser.scm
@@ -1,3 +1,21 @@
+;;; Mudsync --- Live hackable MUD
+;;; Copyright © 2016 Christopher Allan Webber <cwebber@dustycloud.org>
+;;;
+;;; This file is part of Mudsync.
+;;;
+;;; Mudsync is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; Mudsync is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with Mudsync.  If not, see <http://www.gnu.org/licenses/>.
+
 (use-modules (rx irregex)
              (ice-9 match))
 
@@ -13,18 +31,6 @@
              (irregex-match-names rx-match))
         #f)))
 
-
-;; definite and indefinite, but not partitive articles
-(define article '(or "the" "a" "an"))
-(define preposition '(or "with" "in" "on" "out of" "at"))
-
-(define split-verb-and-rest-irx
-  (sre->irregex
-   `(: (* space) (=> verb (+ alphanum))
-       (? (+ space) (=> rest (* any))))))
-
-;; TODO: we could make this MUCH FASTER if we didn't use irregex
-;;   for this step!
 (define (split-verb-and-rest string)
   (let* ((trimmed (string-trim-both string))
          (first-space (string-index trimmed #\space)))
@@ -39,17 +45,26 @@
 (define match-string
   '(seq #\" (* (or (~ #\\ #\") (seq #\\ any))) #\"))
 
+;; definite and indefinite, but not partitive articles
+(define article '(or "the" "a" "an"))
+(define preposition '(or "with" "in" "on" "out of" "at"))
+
 (define indirect-irx
   (sre->irregex
-   `(: (? (: ,article (+ space)))  ; possibly an article (ignored)
-       (=> direct-object (* any))  ; direct object
-       (+ space) (=> preposition ,preposition) (+ space)
-       (? (: ,article (+ space)))
-       (=> indirect-object (+ any)))))
+   `(: (? (: ,preposition (+ space)))  ; possibly a preposition (ignored)
+       (? (: ,article (+ space)))      ; possibly an article (ignored)
+       (=> direct-object (* any))      ; direct object (kept)
+       (+ space)
+       (=> preposition ,preposition)   ; main preposition (kept)
+       (+ space)
+       (? (: ,article (+ space)))      ; possibly an article (ignored)
+       (=> indirect-object (+ any))))) ; indirect object (kept)
 
 (define direct-irx
-  `(: (? (: ,article (+ space)))    ; possibly an article (ignored)
-      (=> direct-object (* any))))  ; direct object
+  (sre->irregex
+   `(: (? (: ,preposition (+ space)))  ; possibly a preposition (ignored)
+       (? (: ,article (+ space)))     ; possibly an article (ignored)
+       (=> direct-object (* any)))))  ; direct object (kept)
 
 
 (define say-example "say I really need to get going.")