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From: Paul Eggert <eggert@cs.ucla.edu>
To: "Mattias Engdegård" <mattiase@acm.org>
Cc: emacs-devel <emacs-devel@gnu.org>
Subject: Re: Emacs regexp scan (Sep 29)
Date: Fri, 4 Oct 2019 14:42:41 -0700	[thread overview]
Message-ID: <02405f0d-788f-1b87-0269-b06eb2d67ff8@cs.ucla.edu> (raw)
In-Reply-To: <1697CA97-B2E6-4202-B14D-99DCF93954FD@acm.org>

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Thanks, I installed the attached patch, which I hope fixes all the bugs 
and style glitches uncovered by that scan, along with some other style 
glitches I noticed in the neighborhood.

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From 57556fa21da431b47b2f3842ddb61273f5d39820 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Fri, 4 Oct 2019 14:38:22 -0700
Subject: [PATCH] Fix bugs found by 2019-09-29 regexp scanner
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Problems reported by Mattias Engdegård in:
https://lists.gnu.org/r/emacs-devel/2019-09/threads.html
* lisp/calendar/iso8601.el (iso8601--year-match)
(iso8601--full-date-match, iso8601--without-day-match)
(iso8601--week-date-match, iso8601--ordinal-date-match)
(iso8601--zone-match):
* lisp/textmodes/rst.el (rst-re-alist-def):
Put ‘-’ at the end of bracketed ranges, following the style
suggestion in the Elisp manual.
(iso8601--time-match): Use \([0-9]*\) instead of \([0-9]+\)?
to pacify the regexp scanner.
(iso8601-parse-time): Adjust accordingly.
* lisp/language/burmese.el (burmese-composable-pattern):
* lisp/language/indian.el (devanagari-composable-pattern)
(bengali-composable-pattern, gurmukhi-composable-pattern)
(gujarati-composable-pattern, oriya-composable-pattern)
(telugu-composable-pattern, kannada-composable-pattern)
(malayalam-composable-pattern):
Prefer [ab] to [a-b] when the characters differ by 1,
to pacify the regexp scanner.
* lisp/language/burmese.el (burmese-composable-pattern):
Fix missing-‘\u’ typos.
* lisp/language/indian.el (gurmukhi-composable-pattern):
Fix missing-‘\’ typo.
* lisp/language/tibetan.el (tibetan-regexp):
Quote ‘+’ in regexp to pacify the regexp scanner.  Simplify.
* lisp/textmodes/rst.el (rst-re-alist-def): Fix ‘[]-'...]’
typo by putting the ‘-’ at end of the bracketed expression.
---
 lisp/calendar/iso8601.el | 18 ++++++-------
 lisp/language/burmese.el |  4 +--
 lisp/language/indian.el  | 58 ++++++++++++++++++++--------------------
 lisp/language/tibetan.el | 23 +++++++---------
 lisp/textmodes/rst.el    |  8 +++---
 5 files changed, 54 insertions(+), 57 deletions(-)

diff --git a/lisp/calendar/iso8601.el b/lisp/calendar/iso8601.el
index 3ff91d910c..78a94d47be 100644
--- a/lisp/calendar/iso8601.el
+++ b/lisp/calendar/iso8601.el
@@ -62,17 +62,17 @@ iso8601--concat-regexps
              regexps "\\|"))
 
 (defconst iso8601--year-match
-  "\\([-+]\\)?\\([0-9][0-9][0-9][0-9]\\)")
+  "\\([+-]\\)?\\([0-9][0-9][0-9][0-9]\\)")
 (defconst iso8601--full-date-match
-  "\\([-+]\\)?\\([0-9][0-9][0-9][0-9]\\)-?\\([0-9][0-9]\\)-?\\([0-9][0-9]\\)")
+  "\\([+-]\\)?\\([0-9][0-9][0-9][0-9]\\)-?\\([0-9][0-9]\\)-?\\([0-9][0-9]\\)")
 (defconst iso8601--without-day-match
-  "\\([-+]\\)?\\([0-9][0-9][0-9][0-9]\\)-\\([0-9][0-9]\\)")
+  "\\([+-]\\)?\\([0-9][0-9][0-9][0-9]\\)-\\([0-9][0-9]\\)")
 (defconst iso8601--outdated-date-match
   "--\\([0-9][0-9]\\)-?\\([0-9][0-9]\\)")
 (defconst iso8601--week-date-match
-  "\\([-+]\\)?\\([0-9][0-9][0-9][0-9]\\)-?W\\([0-9][0-9]\\)-?\\([0-9]\\)?")
+  "\\([+-]\\)?\\([0-9][0-9][0-9][0-9]\\)-?W\\([0-9][0-9]\\)-?\\([0-9]\\)?")
 (defconst iso8601--ordinal-date-match
-  "\\([-+]\\)?\\([0-9][0-9][0-9][0-9]\\)-?\\([0-9][0-9][0-9]\\)")
+  "\\([+-]\\)?\\([0-9][0-9][0-9][0-9]\\)-?\\([0-9][0-9][0-9]\\)")
 (defconst iso8601--date-match
   (iso8601--concat-regexps
    (list iso8601--year-match
@@ -83,10 +83,10 @@ iso8601--date-match
          iso8601--ordinal-date-match)))
 
 (defconst iso8601--time-match
-  "\\([0-9][0-9]\\):?\\([0-9][0-9]\\)?:?\\([0-9][0-9]\\)?[.,]?\\([0-9]+\\)?")
+  "\\([0-9][0-9]\\):?\\([0-9][0-9]\\)?:?\\([0-9][0-9]\\)?[.,]?\\([0-9]*\\)")
 
 (defconst iso8601--zone-match
-  "\\(Z\\|\\([-+]\\)\\([0-9][0-9]\\):?\\([0-9][0-9]\\)?\\)")
+  "\\(Z\\|\\([+-]\\)\\([0-9][0-9]\\):?\\([0-9][0-9]\\)?\\)")
 
 (defconst iso8601--full-time-match
   (concat "\\(" (replace-regexp-in-string "(" "(?:" iso8601--time-match) "\\)"
@@ -142,7 +142,7 @@ iso8601-parse
 (defun iso8601-parse-date (string)
   "Parse STRING (in ISO 8601 format) and return a `decode-time' value."
   (cond
-   ;; Just a year: [-+]YYYY.
+   ;; Just a year: [+-]YYYY.
    ((iso8601--match iso8601--year-match string)
     (iso8601--decoded-time
      :year (iso8601--adjust-year (match-string 1 string)
@@ -236,7 +236,7 @@ iso8601-parse-time
                            (string-to-number (match-string 2 time))))
               (second (and (match-string 3 time)
                            (string-to-number (match-string 3 time))))
-              (fraction (and (match-string 4 time)
+	      (fraction (and (not (zerop (length (match-string 4 time))))
                              (string-to-number (match-string 4 time)))))
           (when (and fraction
                      (eq form t))
diff --git a/lisp/language/burmese.el b/lisp/language/burmese.el
index 25425ec485..7f2a99a41a 100644
--- a/lisp/language/burmese.el
+++ b/lisp/language/burmese.el
@@ -39,11 +39,11 @@
 (defvar burmese-composable-pattern
   (let ((table
 	 '(("K" . "[\u1004\u105A]\u103A\u1039") ; KINZI sequence
-	   ("C" . "[\u1000-\u102A\u103F\u1041-\u1049\u104E\u105A-\u105D\u1061\u1065-\u1066\u106E\u1071\u1075\u1081\u108E\uAA60-\uAA6F\uAA71-\uAA76]") ; consonant and vowel letter
+	   ("C" . "[\u1000-\u102A\u103F\u1041-\u1049\u104E\u105A-\u105D\u1061\u1065\u1066\u106E\u1071\u1075\u1081\u108E\uAA60-\uAA6F\uAA71-\uAA76]") ; consonant and vowel letter
 	   ("V" . "\u1039")					   ; VIRAMA
 	   ("A" . "\u103A")					   ; ASAT
 	   ("S" . "[\u1000-\u1019\u101C\u101E\u1020\u1021\u105A]") ; subscript
-	   ("M" . "[\u103B-\u103E\105E-\1060]") ; medial
+	   ("M" . "[\u103B-\u103E\u105E-\u1060]") ; medial
 	   ("v" . "[\u102B-\u103A\u103C-\u103E\u1062-\u1064\u1067-\u106D\u1071-\u1074\u1082-\u108D\u108F\u109A\u109C\uAA70]"))) ; vowel sign, etc.
 	(regexp "\\(K\\)?C\\(VS\\)?\\(VS\\)?A?M*v*"))
     (let ((case-fold-search nil))
diff --git a/lisp/language/indian.el b/lisp/language/indian.el
index f1e61a354c..4013faca7c 100644
--- a/lisp/language/indian.el
+++ b/lisp/language/indian.el
@@ -139,14 +139,14 @@ devanagari-composable-pattern
   (let ((table
 	 '(("a" . "[\u0900-\u0902]")	; vowel modifier (above)
 	   ("A" . "\u0903")		; vowel modifier (post)
-	   ("V" . "[\u0904-\u0914\u0960-\u0961\u0972]") ; independent vowel
+	   ("V" . "[\u0904-\u0914\u0960\u0961\u0972]") ; independent vowel
 	   ("C" . "[\u0915-\u0939\u0958-\u095F\u0979-\u097F]") ; consonant
 	   ("R" . "\u0930")		; RA
 	   ("n" . "\u093C")		; NUKTA
-	   ("v" . "[\u093E-\u094C\u094E\u0955\u0962-\u0963]") ; vowel sign
+	   ("v" . "[\u093E-\u094C\u094E\u0955\u0962\u0963]") ; vowel sign
 	   ("H" . "\u094D")		; HALANT
-	   ("s" . "[\u0951-\u0952]")	; stress sign
-	   ("t" . "[\u0953-\u0954]")	; accent
+	   ("s" . "[\u0951\u0952]")	; stress sign
+	   ("t" . "[\u0953\u0954]")	; accent
 	   ("N" . "\u200C")		; ZWNJ
 	   ("J" . "\u200D")		; ZWJ
 	   ("X" . "[\u0900-\u097F]"))))	; all coverage
@@ -166,13 +166,13 @@ devanagari-composable-pattern
 (defconst bengali-composable-pattern
   (let ((table
 	 '(("a" . "\u0981")		; SIGN CANDRABINDU
-	   ("A" . "[\u0982-\u0983]")	; SIGN ANUSVARA .. VISARGA
-	   ("V" . "[\u0985-\u0994\u09E0-\u09E1]") ; independent vowel
+	   ("A" . "[\u0982\u0983]")	; SIGN ANUSVARA .. VISARGA
+	   ("V" . "[\u0985-\u0994\u09E0\u09E1]") ; independent vowel
 	   ("C" . "[\u0995-\u09B9\u09DC-\u09DF\u09F1]") ; consonant
-	   ("B" . "[\u09AC\u09AF-\u09B0\u09F0]")		; BA, YA, RA
+	   ("B" . "[\u09AC\u09AF\u09B0\u09F0]")		; BA, YA, RA
 	   ("R" . "[\u09B0\u09F0]")		; RA
 	   ("n" . "\u09BC")		; NUKTA
-	   ("v" . "[\u09BE-\u09CC\u09D7\u09E2-\u09E3]") ; vowel sign
+	   ("v" . "[\u09BE-\u09CC\u09D7\u09E2\u09E3]") ; vowel sign
 	   ("H" . "\u09CD")		; HALANT
 	   ("T" . "\u09CE")		; KHANDA TA
 	   ("N" . "\u200C")		; ZWNJ
@@ -195,11 +195,11 @@ bengali-composable-pattern
 
 (defconst gurmukhi-composable-pattern
   (let ((table
-	 '(("a" . "[\u0A01-\u0A02\u0A70]") ; SIGN ADAK BINDI .. BINDI, TIPPI
+	 '(("a" . "[\u0A01\u0A02\u0A70]") ; SIGN ADAK BINDI .. BINDI, TIPPI
 	   ("A" . "\u0A03")		; SIGN VISARGA
 	   ("V" . "[\u0A05-\u0A14]")	; independent vowel
 	   ("C" . "[\u0A15-\u0A39\u0A59-\u0A5E]")	; consonant
-	   ("Y" . "[\u0A2F-u0A30\u0A35\u0A39]") ; YA, RA, VA, HA
+	   ("Y" . "[\u0A2F-\u0A30\u0A35\u0A39]") ; YA, RA, VA, HA
 	   ("n" . "\u0A3C")		; NUKTA
 	   ("v" . "[\u0A3E-\u0A4C]")	; vowel sign
 	   ("H" . "\u0A4D")		; VIRAMA
@@ -221,13 +221,13 @@ gurmukhi-composable-pattern
 
 (defconst gujarati-composable-pattern
   (let ((table
-	 '(("a" . "[\u0A81-\u0A82]")	; SIGN CANDRABINDU .. ANUSVARA
+	 '(("a" . "[\u0A81\u0A82]")	; SIGN CANDRABINDU .. ANUSVARA
 	   ("A" . "\u0A83")		; SIGN VISARGA
-	   ("V" . "[\u0A85-\u0A94\u0AE0-\u0AE1]") ; independent vowel
+	   ("V" . "[\u0A85-\u0A94\u0AE0\u0AE1]") ; independent vowel
 	   ("C" . "[\u0A95-\u0AB9]")	; consonant
 	   ("R" . "\u0AB0")		; RA
 	   ("n" . "\u0ABC")		; NUKTA
-	   ("v" . "[\u0ABE-\u0ACC\u0AE2-\u0AE3]") ; vowel sign
+	   ("v" . "[\u0ABE-\u0ACC\u0AE2\u0AE3]") ; vowel sign
 	   ("H" . "\u0ACD")		; VIRAMA
 	   ("N" . "\u200C")		; ZWNJ
 	   ("J" . "\u200D")		; ZWJ
@@ -248,13 +248,13 @@ gujarati-composable-pattern
 (defconst oriya-composable-pattern
   (let ((table
 	 '(("a" . "\u0B01")		; SIGN CANDRABINDU
-	   ("A" . "[\u0B02-\u0B03]")	; SIGN ANUSVARA .. VISARGA
-	   ("V" . "[\u0B05-\u0B14\u0B60-\u0B61]") ; independent vowel
-	   ("C" . "[\u0B15-\u0B39\u0B5C-\u0B5D\u0B71]")	; consonant
-	   ("B" . "[\u0B15-\u0B17\u0B1B-\u0B1D\u0B1F-\u0B21\u0B23-\u0B24\u0B27-\u0B30\u0B32-\u0B35\u0B38-\u0B39]") ; consonant with below form
+	   ("A" . "[\u0B02\u0B03]")	; SIGN ANUSVARA .. VISARGA
+	   ("V" . "[\u0B05-\u0B14\u0B60\u0B61]") ; independent vowel
+	   ("C" . "[\u0B15-\u0B39\u0B5C\u0B5D\u0B71]")	; consonant
+	   ("B" . "[\u0B15-\u0B17\u0B1B-\u0B1D\u0B1F-\u0B21\u0B23\u0B24\u0B27-\u0B30\u0B32-\u0B35\u0B38\u0B39]") ; consonant with below form
 	   ("R" . "\u0B30")		; RA
 	   ("n" . "\u0B3C")		; NUKTA
-	   ("v" . "[\u0B3E-\u0B4C\u0B56-\u0B57\u0B62-\u0B63]") ; vowel sign
+	   ("v" . "[\u0B3E-\u0B4C\u0B56\u0B57\u0B62\u0B63]") ; vowel sign
 	   ("H" . "\u0B4D")		; VIRAMA
 	   ("N" . "\u200C")		; ZWNJ
 	   ("J" . "\u200D")		; ZWJ
@@ -296,9 +296,9 @@ tamil-composable-pattern
 (defconst telugu-composable-pattern
   (let ((table
 	 '(("a" . "[\u0C01-\u0C03]")	; SIGN CANDRABINDU .. VISARGA
-	   ("V" . "[\u0C05-\u0C14\u0C60-\u0C61]") ; independent vowel
-	   ("C" . "[\u0C15-\u0C39\u0C58-\u0C59]") ; consonant
-	   ("v" . "[\u0C3E-\u0C4C\u0C55-\u0C56\u0C62-\u0C63]")	; vowel sign
+	   ("V" . "[\u0C05-\u0C14\u0C60\u0C61]") ; independent vowel
+	   ("C" . "[\u0C15-\u0C39\u0C58\u0C59]") ; consonant
+	   ("v" . "[\u0C3E-\u0C4C\u0C55\u0C56\u0C62\u0C63]")	; vowel sign
 	   ("H" . "\u0C4D")		; VIRAMA
 	   ("N" . "\u200C")		; ZWNJ
 	   ("J" . "\u200D")		; ZWJ
@@ -318,12 +318,12 @@ telugu-composable-pattern
 
 (defconst kannada-composable-pattern
   (let ((table
-	 '(("A" . "[\u0C82-\u0C83]")	; SIGN ANUSVARA .. VISARGA
-	   ("V" . "[\u0C85-\u0C94\u0CE0-\u0CE1]") ; independent vowel
-	   ("C" . "[\u0C95-\u0CB9\u0CDE]")	  ; consonant
+	 '(("A" . "[\u0C82\u0C83]")	; SIGN ANUSVARA .. VISARGA
+	   ("V" . "[\u0C85-\u0C94\u0CE0\u0CE1]") ; independent vowel
+	   ("C" . "[\u0C95-\u0CB9\u0CDE]")	 ; consonant
 	   ("R" . "\u0CB0")		; RA
 	   ("n" . "\u0CBC")		; NUKTA
-	   ("v" . "[\u0CBE-\u0CCC\u0CD5-\u0CD6\u0CE2-\u0CE3]") ; vowel sign
+	   ("v" . "[\u0CBE-\u0CCC\u0CD5\u0CD6\u0CE2\u0CE3]") ; vowel sign
 	   ("H" . "\u0CCD")		; VIRAMA
 	   ("N" . "\u200C")		; ZWNJ
 	   ("J" . "\u200D")		; ZWJ
@@ -343,11 +343,11 @@ kannada-composable-pattern
 
 (defconst malayalam-composable-pattern
   (let ((table
-	 '(("A" . "[\u0D02-\u0D03]")	; SIGN ANUSVARA .. VISARGA
-	   ("V" . "[\u0D05-\u0D14\u0D60-\u0D61]") ; independent vowel
+	 '(("A" . "[\u0D02\u0D03]")	; SIGN ANUSVARA .. VISARGA
+	   ("V" . "[\u0D05-\u0D14\u0D60\u0D61]")  ; independent vowel
 	   ("C" . "[\u0D15-\u0D39]")		  ; consonant
-	   ("Y" . "[\u0D2F-\u0D30\u0D32\u0D35]")  ; YA, RA, LA, VA
-	   ("v" . "[\u0D3E-\u0D4C\u0D57\u0D62-\u0D63]")	; postbase matra
+	   ("Y" . "[\u0D2F\u0D30\u0D32\u0D35]")   ; YA, RA, LA, VA
+	   ("v" . "[\u0D3E-\u0D4C\u0D57\u0D62\u0D63]")	; postbase matra
 	   ("H" . "\u0D4D")			  ; SIGN VIRAMA
 	   ("N" . "\u200C")			  ; ZWNJ
 	   ("J" . "\u200D")			  ; ZWJ
diff --git a/lisp/language/tibetan.el b/lisp/language/tibetan.el
index 4be25cecab..b42a1e8fb8 100644
--- a/lisp/language/tibetan.el
+++ b/lisp/language/tibetan.el
@@ -549,19 +549,16 @@ tibetan-precomposition-rule-alist
     ("སྨ" . "ö†°")))
 
 (defconst tibetan-regexp
-  (let ((l (list tibetan-precomposed-transcription-alist
-		 tibetan-consonant-transcription-alist
-		 tibetan-vowel-transcription-alist
-		 tibetan-modifier-transcription-alist
-		 tibetan-subjoined-transcription-alist))
-	(separator "\\|")
-	tail pattern)
-    (while l
-      (setq tail (car l) l (cdr l))
-      (while tail
-	(setq pattern (cons separator (cons (car (car tail)) pattern))
-	      tail (cdr tail))))
-    (apply 'concat (nreverse (cdr pattern))))
+  (let (pattern)
+    (dolist (alist (list tibetan-precomposed-transcription-alist
+			 tibetan-consonant-transcription-alist
+			 tibetan-vowel-transcription-alist
+			 tibetan-modifier-transcription-alist
+			 tibetan-subjoined-transcription-alist)
+		   (apply #'concat (nreverse (cdr pattern))))
+      (dolist (key-val alist)
+	(setq pattern (cons "\\|" (cons (regexp-quote (car key-val))
+					pattern))))))
   "Regexp matching a Tibetan transcription of a composable Tibetan sequence.
 The result of matching is to be used for indexing alists at conversion
 from a roman transcription to the corresponding Tibetan character.")
diff --git a/lisp/textmodes/rst.el b/lisp/textmodes/rst.el
index 88c44c06da..b7438fbb10 100644
--- a/lisp/textmodes/rst.el
+++ b/lisp/textmodes/rst.el
@@ -388,8 +388,8 @@ rst-re-alist-def
 				        ; item tag.
 
     ;; Inline markup (`ilm')
-    (ilm-pfx (:alt "^" hws-prt "[-'\"([{<‘“«’/:]"))
-    (ilm-sfx (:alt "$" hws-prt "[]-'\")}>’”»/:.,;!?\\]"))
+    (ilm-pfx (:alt "^" hws-prt "['\"([{<‘“«’/:-]"))
+    (ilm-sfx (:alt "$" hws-prt "[]'\")}>’”»/:.,;!?\\-]"))
 
     ;; Inline markup content (`ilc')
     (ilcsgl-tag "\\S ") ; A single non-white character.
@@ -431,7 +431,7 @@ rst-re-alist-def
     (fld-tag ":" fldnam-tag ":") ; A field marker.
 
     ;; Options (`opt')
-    (optsta-tag (:alt "[-+/]" "--")) ; Start of an option.
+    (optsta-tag (:alt "[+/-]" "--")) ; Start of an option.
     (optnam-tag "\\sw" (:alt "-" "\\sw") "*") ; Name of an option.
     (optarg-tag (:shy "[ =]\\S +")) ; Option argument.
     (optsep-tag (:shy "," hws-prt)) ; Separator between options.
@@ -457,7 +457,7 @@ rst-re-alist-def
 				       ; tag.
 
     ;; Symbol (`sym')
-    (sym-prt "[-+.:_]") ; Non-word part of a symbol.
+    (sym-prt "[+.:_-]") ; Non-word part of a symbol.
     (sym-tag (:shy "\\sw+" (:shy sym-prt "\\sw+") "*"))
 
     ;; URIs (`uri')
-- 
2.21.0


  reply	other threads:[~2019-10-04 21:42 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-29 19:39 Emacs regexp scan (Sep 29) Mattias Engdegård
2019-10-04 21:42 ` Paul Eggert [this message]
2019-10-05  8:10   ` Eli Zaretskii
2019-10-05  9:37     ` Mattias Engdegård
2019-10-05 10:49       ` Eli Zaretskii
2019-10-05 15:16         ` Stefan Monnier
2019-10-05 16:02           ` Eli Zaretskii
2019-10-05  9:52     ` Paul Eggert
2019-10-05 10:59       ` Eli Zaretskii
2019-10-05 15:20         ` Stefan Monnier
2019-10-05 16:03           ` Eli Zaretskii
2019-10-06 13:42             ` Stefan Monnier
2019-10-06 18:01               ` Eli Zaretskii
2019-10-05 19:19         ` Paul Eggert
2019-10-05 19:31           ` Eli Zaretskii
2019-10-05 19:50             ` Paul Eggert
2019-10-06 17:19               ` Eli Zaretskii
2019-10-06 17:33                 ` Paul Eggert
2019-10-06 18:53                   ` Eli Zaretskii
2019-10-06 19:19                     ` Paul Eggert
2019-10-06 19:31                       ` Eli Zaretskii
2019-10-05 16:59     ` Lars Ingebrigtsen
2019-10-05 18:52       ` Paul Eggert
2019-10-05 10:03   ` Mattias Engdegård

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