Update doc/syntax.html.
Fixes #235.
Change-Id: If89c3120aee012a3b40d44995abdd604cc0ad7ef
Reviewed-on: https://code-review.googlesource.com/c/re2/+/51977
Reviewed-by: Paul Wankadia <junyer@google.com>
diff --git a/doc/syntax.html b/doc/syntax.html
index aa08b11..8a268a1 100644
--- a/doc/syntax.html
+++ b/doc/syntax.html
@@ -47,6 +47,10 @@
<tr><td><code><font color=#808080>x{-n}</font></code></td><td>(≡ <code>x{n}?</code>) <font size=-2>VIM</font></td></tr>
<tr><td><code><font color=#808080>x=</font></code></td><td>(≡ <code>x?</code>) <font size=-2>VIM</font></td></tr>
<tr><td></td></tr>
+<tr><td colspan=2>Implementation restriction: The counting forms <code>x{n,m}</code>, <code>x{n,}</code>, and <code>x{n}</code></td></tr>
+<tr><td colspan=2>reject forms that create a minimum or maximum repetition count above 1000.</td></tr>
+<tr><td colspan=2>Unlimited repetitions are not subject to this restriction.</td></tr>
+<tr><td></td></tr>
<tr><td colspan=2><b>Possessive repetitions:</b></td></tr>
<tr><td><code><font color=#808080>x*+</font></code></td><td>zero or more <code>x</code>, possessive </td></tr>
<tr><td><code><font color=#808080>x++</font></code></td><td>one or more <code>x</code>, possessive </td></tr>
@@ -56,10 +60,10 @@
<tr><td><code><font color=#808080>x{n}+</font></code></td><td>exactly <code>n</code> <code>x</code>, possessive </td></tr>
<tr><td></td></tr>
<tr><td colspan=2><b>Grouping:</b></td></tr>
-<tr><td><code>(re)</code></td><td>numbered capturing group</td></tr>
-<tr><td><code>(?P<name>re)</code></td><td>named & numbered capturing group</td></tr>
-<tr><td><code><font color=#808080>(?<name>re)</font></code></td><td>named & numbered capturing group </td></tr>
-<tr><td><code><font color=#808080>(?'name're)</font></code></td><td>named & numbered capturing group </td></tr>
+<tr><td><code>(re)</code></td><td>numbered capturing group (submatch)</td></tr>
+<tr><td><code>(?P<name>re)</code></td><td>named & numbered capturing group (submatch)</td></tr>
+<tr><td><code><font color=#808080>(?<name>re)</font></code></td><td>named & numbered capturing group (submatch) </td></tr>
+<tr><td><code><font color=#808080>(?'name're)</font></code></td><td>named & numbered capturing group (submatch) </td></tr>
<tr><td><code>(?:re)</code></td><td>non-capturing group</td></tr>
<tr><td><code>(?flags)</code></td><td>set flags within current group; non-capturing</td></tr>
<tr><td><code>(?flags:re)</code></td><td>set flags during re; non-capturing</td></tr>
@@ -80,8 +84,8 @@
<tr><td><code>^</code></td><td>at beginning of text or line (<code>m</code>=true)</td></tr>
<tr><td><code>$</code></td><td>at end of text (like <code>\z</code> not <code>\Z</code>) or line (<code>m</code>=true)</td></tr>
<tr><td><code>\A</code></td><td>at beginning of text</td></tr>
-<tr><td><code>\b</code></td><td>at word boundary (<code>\w</code> on one side and <code>\W</code>, <code>\A</code>, or <code>\z</code> on the other)</td></tr>
-<tr><td><code>\B</code></td><td>not a word boundary</td></tr>
+<tr><td><code>\b</code></td><td>at ASCII word boundary (<code>\w</code> on one side and <code>\W</code>, <code>\A</code>, or <code>\z</code> on the other)</td></tr>
+<tr><td><code>\B</code></td><td>not at ASCII word boundary</td></tr>
<tr><td><code><font color=#808080>\G</font></code></td><td>at beginning of subtext being searched <font size=-2>PCRE</font></td></tr>
<tr><td><code><font color=#808080>\G</font></code></td><td>at end of last match <font size=-2>PERL</font></td></tr>
<tr><td><code><font color=#808080>\Z</font></code></td><td>at end of text, or before newline at end of text </td></tr>
@@ -166,7 +170,7 @@
<tr><td><code>[\p{Name}]</code></td><td>named Unicode property inside character class (≡ <code>\p{Name}</code>)</td></tr>
<tr><td><code>[^\p{Name}]</code></td><td>named Unicode property inside negated character class (≡ <code>\P{Name}</code>)</td></tr>
<tr><td></td></tr>
-<tr><td colspan=2><b>Perl character classes:</b></td></tr>
+<tr><td colspan=2><b>Perl character classes (all ASCII-only):</b></td></tr>
<tr><td><code>\d</code></td><td>digits (≡ <code>[0-9]</code>)</td></tr>
<tr><td><code>\D</code></td><td>not digits (≡ <code>[^0-9]</code>)</td></tr>
<tr><td><code>\s</code></td><td>whitespace (≡ <code>[\t\n\f\r ]</code>)</td></tr>
@@ -237,105 +241,158 @@
<tr><td><code>Zs</code></td><td>space separator</td></tr>
<tr><td></td></tr>
<tr><td colspan=2><b>Unicode character class names--scripts:</b></td></tr>
-<tr><td><code>Arabic</code></td><td>Arabic</td></tr>
-<tr><td><code>Armenian</code></td><td>Armenian</td></tr>
-<tr><td><code>Balinese</code></td><td>Balinese</td></tr>
-<tr><td><code>Bamum</code></td><td>Bamum</td></tr>
-<tr><td><code>Batak</code></td><td>Batak</td></tr>
-<tr><td><code>Bengali</code></td><td>Bengali</td></tr>
-<tr><td><code>Bopomofo</code></td><td>Bopomofo</td></tr>
-<tr><td><code>Brahmi</code></td><td>Brahmi</td></tr>
-<tr><td><code>Braille</code></td><td>Braille</td></tr>
-<tr><td><code>Buginese</code></td><td>Buginese</td></tr>
-<tr><td><code>Buhid</code></td><td>Buhid</td></tr>
-<tr><td><code>Canadian_Aboriginal</code></td><td>Canadian Aboriginal</td></tr>
-<tr><td><code>Carian</code></td><td>Carian</td></tr>
-<tr><td><code>Chakma</code></td><td>Chakma</td></tr>
-<tr><td><code>Cham</code></td><td>Cham</td></tr>
-<tr><td><code>Cherokee</code></td><td>Cherokee</td></tr>
-<tr><td><code>Common</code></td><td>characters not specific to one script</td></tr>
-<tr><td><code>Coptic</code></td><td>Coptic</td></tr>
-<tr><td><code>Cuneiform</code></td><td>Cuneiform</td></tr>
-<tr><td><code>Cypriot</code></td><td>Cypriot</td></tr>
-<tr><td><code>Cyrillic</code></td><td>Cyrillic</td></tr>
-<tr><td><code>Deseret</code></td><td>Deseret</td></tr>
-<tr><td><code>Devanagari</code></td><td>Devanagari</td></tr>
-<tr><td><code>Egyptian_Hieroglyphs</code></td><td>Egyptian Hieroglyphs</td></tr>
-<tr><td><code>Ethiopic</code></td><td>Ethiopic</td></tr>
-<tr><td><code>Georgian</code></td><td>Georgian</td></tr>
-<tr><td><code>Glagolitic</code></td><td>Glagolitic</td></tr>
-<tr><td><code>Gothic</code></td><td>Gothic</td></tr>
-<tr><td><code>Greek</code></td><td>Greek</td></tr>
-<tr><td><code>Gujarati</code></td><td>Gujarati</td></tr>
-<tr><td><code>Gurmukhi</code></td><td>Gurmukhi</td></tr>
-<tr><td><code>Han</code></td><td>Han</td></tr>
-<tr><td><code>Hangul</code></td><td>Hangul</td></tr>
-<tr><td><code>Hanunoo</code></td><td>Hanunoo</td></tr>
-<tr><td><code>Hebrew</code></td><td>Hebrew</td></tr>
-<tr><td><code>Hiragana</code></td><td>Hiragana</td></tr>
-<tr><td><code>Imperial_Aramaic</code></td><td>Imperial Aramaic</td></tr>
-<tr><td><code>Inherited</code></td><td>inherit script from previous character</td></tr>
-<tr><td><code>Inscriptional_Pahlavi</code></td><td>Inscriptional Pahlavi</td></tr>
-<tr><td><code>Inscriptional_Parthian</code></td><td>Inscriptional Parthian</td></tr>
-<tr><td><code>Javanese</code></td><td>Javanese</td></tr>
-<tr><td><code>Kaithi</code></td><td>Kaithi</td></tr>
-<tr><td><code>Kannada</code></td><td>Kannada</td></tr>
-<tr><td><code>Katakana</code></td><td>Katakana</td></tr>
-<tr><td><code>Kayah_Li</code></td><td>Kayah Li</td></tr>
-<tr><td><code>Kharoshthi</code></td><td>Kharoshthi</td></tr>
-<tr><td><code>Khmer</code></td><td>Khmer</td></tr>
-<tr><td><code>Lao</code></td><td>Lao</td></tr>
-<tr><td><code>Latin</code></td><td>Latin</td></tr>
-<tr><td><code>Lepcha</code></td><td>Lepcha</td></tr>
-<tr><td><code>Limbu</code></td><td>Limbu</td></tr>
-<tr><td><code>Linear_B</code></td><td>Linear B</td></tr>
-<tr><td><code>Lycian</code></td><td>Lycian</td></tr>
-<tr><td><code>Lydian</code></td><td>Lydian</td></tr>
-<tr><td><code>Malayalam</code></td><td>Malayalam</td></tr>
-<tr><td><code>Mandaic</code></td><td>Mandaic</td></tr>
-<tr><td><code>Meetei_Mayek</code></td><td>Meetei Mayek</td></tr>
-<tr><td><code>Meroitic_Cursive</code></td><td>Meroitic Cursive</td></tr>
-<tr><td><code>Meroitic_Hieroglyphs</code></td><td>Meroitic Hieroglyphs</td></tr>
-<tr><td><code>Miao</code></td><td>Miao</td></tr>
-<tr><td><code>Mongolian</code></td><td>Mongolian</td></tr>
-<tr><td><code>Myanmar</code></td><td>Myanmar</td></tr>
-<tr><td><code>New_Tai_Lue</code></td><td>New Tai Lue (aka Simplified Tai Lue)</td></tr>
-<tr><td><code>Nko</code></td><td>Nko</td></tr>
-<tr><td><code>Ogham</code></td><td>Ogham</td></tr>
-<tr><td><code>Ol_Chiki</code></td><td>Ol Chiki</td></tr>
-<tr><td><code>Old_Italic</code></td><td>Old Italic</td></tr>
-<tr><td><code>Old_Persian</code></td><td>Old Persian</td></tr>
-<tr><td><code>Old_South_Arabian</code></td><td>Old South Arabian</td></tr>
-<tr><td><code>Old_Turkic</code></td><td>Old Turkic</td></tr>
-<tr><td><code>Oriya</code></td><td>Oriya</td></tr>
-<tr><td><code>Osmanya</code></td><td>Osmanya</td></tr>
-<tr><td><code>Phags_Pa</code></td><td>'Phags Pa</td></tr>
-<tr><td><code>Phoenician</code></td><td>Phoenician</td></tr>
-<tr><td><code>Rejang</code></td><td>Rejang</td></tr>
-<tr><td><code>Runic</code></td><td>Runic</td></tr>
-<tr><td><code>Saurashtra</code></td><td>Saurashtra</td></tr>
-<tr><td><code>Sharada</code></td><td>Sharada</td></tr>
-<tr><td><code>Shavian</code></td><td>Shavian</td></tr>
-<tr><td><code>Sinhala</code></td><td>Sinhala</td></tr>
-<tr><td><code>Sora_Sompeng</code></td><td>Sora Sompeng</td></tr>
-<tr><td><code>Sundanese</code></td><td>Sundanese</td></tr>
-<tr><td><code>Syloti_Nagri</code></td><td>Syloti Nagri</td></tr>
-<tr><td><code>Syriac</code></td><td>Syriac</td></tr>
-<tr><td><code>Tagalog</code></td><td>Tagalog</td></tr>
-<tr><td><code>Tagbanwa</code></td><td>Tagbanwa</td></tr>
-<tr><td><code>Tai_Le</code></td><td>Tai Le</td></tr>
-<tr><td><code>Tai_Tham</code></td><td>Tai Tham</td></tr>
-<tr><td><code>Tai_Viet</code></td><td>Tai Viet</td></tr>
-<tr><td><code>Takri</code></td><td>Takri</td></tr>
-<tr><td><code>Tamil</code></td><td>Tamil</td></tr>
-<tr><td><code>Telugu</code></td><td>Telugu</td></tr>
-<tr><td><code>Thaana</code></td><td>Thaana</td></tr>
-<tr><td><code>Thai</code></td><td>Thai</td></tr>
-<tr><td><code>Tibetan</code></td><td>Tibetan</td></tr>
-<tr><td><code>Tifinagh</code></td><td>Tifinagh</td></tr>
-<tr><td><code>Ugaritic</code></td><td>Ugaritic</td></tr>
-<tr><td><code>Vai</code></td><td>Vai</td></tr>
-<tr><td><code>Yi</code></td><td>Yi</td></tr>
+<tr><td colspan=2>Adlam</td></tr>
+<tr><td colspan=2>Ahom</td></tr>
+<tr><td colspan=2>Anatolian_Hieroglyphs</td></tr>
+<tr><td colspan=2>Arabic</td></tr>
+<tr><td colspan=2>Armenian</td></tr>
+<tr><td colspan=2>Avestan</td></tr>
+<tr><td colspan=2>Balinese</td></tr>
+<tr><td colspan=2>Bamum</td></tr>
+<tr><td colspan=2>Bassa_Vah</td></tr>
+<tr><td colspan=2>Batak</td></tr>
+<tr><td colspan=2>Bengali</td></tr>
+<tr><td colspan=2>Bhaiksuki</td></tr>
+<tr><td colspan=2>Bopomofo</td></tr>
+<tr><td colspan=2>Brahmi</td></tr>
+<tr><td colspan=2>Braille</td></tr>
+<tr><td colspan=2>Buginese</td></tr>
+<tr><td colspan=2>Buhid</td></tr>
+<tr><td colspan=2>Canadian_Aboriginal</td></tr>
+<tr><td colspan=2>Carian</td></tr>
+<tr><td colspan=2>Caucasian_Albanian</td></tr>
+<tr><td colspan=2>Chakma</td></tr>
+<tr><td colspan=2>Cham</td></tr>
+<tr><td colspan=2>Cherokee</td></tr>
+<tr><td colspan=2>Common</td></tr>
+<tr><td colspan=2>Coptic</td></tr>
+<tr><td colspan=2>Cuneiform</td></tr>
+<tr><td colspan=2>Cypriot</td></tr>
+<tr><td colspan=2>Cyrillic</td></tr>
+<tr><td colspan=2>Deseret</td></tr>
+<tr><td colspan=2>Devanagari</td></tr>
+<tr><td colspan=2>Dogra</td></tr>
+<tr><td colspan=2>Duployan</td></tr>
+<tr><td colspan=2>Egyptian_Hieroglyphs</td></tr>
+<tr><td colspan=2>Elbasan</td></tr>
+<tr><td colspan=2>Elymaic</td></tr>
+<tr><td colspan=2>Ethiopic</td></tr>
+<tr><td colspan=2>Georgian</td></tr>
+<tr><td colspan=2>Glagolitic</td></tr>
+<tr><td colspan=2>Gothic</td></tr>
+<tr><td colspan=2>Grantha</td></tr>
+<tr><td colspan=2>Greek</td></tr>
+<tr><td colspan=2>Gujarati</td></tr>
+<tr><td colspan=2>Gunjala_Gondi</td></tr>
+<tr><td colspan=2>Gurmukhi</td></tr>
+<tr><td colspan=2>Han</td></tr>
+<tr><td colspan=2>Hangul</td></tr>
+<tr><td colspan=2>Hanifi_Rohingya</td></tr>
+<tr><td colspan=2>Hanunoo</td></tr>
+<tr><td colspan=2>Hatran</td></tr>
+<tr><td colspan=2>Hebrew</td></tr>
+<tr><td colspan=2>Hiragana</td></tr>
+<tr><td colspan=2>Imperial_Aramaic</td></tr>
+<tr><td colspan=2>Inherited</td></tr>
+<tr><td colspan=2>Inscriptional_Pahlavi</td></tr>
+<tr><td colspan=2>Inscriptional_Parthian</td></tr>
+<tr><td colspan=2>Javanese</td></tr>
+<tr><td colspan=2>Kaithi</td></tr>
+<tr><td colspan=2>Kannada</td></tr>
+<tr><td colspan=2>Katakana</td></tr>
+<tr><td colspan=2>Kayah_Li</td></tr>
+<tr><td colspan=2>Kharoshthi</td></tr>
+<tr><td colspan=2>Khmer</td></tr>
+<tr><td colspan=2>Khojki</td></tr>
+<tr><td colspan=2>Khudawadi</td></tr>
+<tr><td colspan=2>Lao</td></tr>
+<tr><td colspan=2>Latin</td></tr>
+<tr><td colspan=2>Lepcha</td></tr>
+<tr><td colspan=2>Limbu</td></tr>
+<tr><td colspan=2>Linear_A</td></tr>
+<tr><td colspan=2>Linear_B</td></tr>
+<tr><td colspan=2>Lisu</td></tr>
+<tr><td colspan=2>Lycian</td></tr>
+<tr><td colspan=2>Lydian</td></tr>
+<tr><td colspan=2>Mahajani</td></tr>
+<tr><td colspan=2>Makasar</td></tr>
+<tr><td colspan=2>Malayalam</td></tr>
+<tr><td colspan=2>Mandaic</td></tr>
+<tr><td colspan=2>Manichaean</td></tr>
+<tr><td colspan=2>Marchen</td></tr>
+<tr><td colspan=2>Masaram_Gondi</td></tr>
+<tr><td colspan=2>Medefaidrin</td></tr>
+<tr><td colspan=2>Meetei_Mayek</td></tr>
+<tr><td colspan=2>Mende_Kikakui</td></tr>
+<tr><td colspan=2>Meroitic_Cursive</td></tr>
+<tr><td colspan=2>Meroitic_Hieroglyphs</td></tr>
+<tr><td colspan=2>Miao</td></tr>
+<tr><td colspan=2>Modi</td></tr>
+<tr><td colspan=2>Mongolian</td></tr>
+<tr><td colspan=2>Mro</td></tr>
+<tr><td colspan=2>Multani</td></tr>
+<tr><td colspan=2>Myanmar</td></tr>
+<tr><td colspan=2>Nabataean</td></tr>
+<tr><td colspan=2>Nandinagari</td></tr>
+<tr><td colspan=2>New_Tai_Lue</td></tr>
+<tr><td colspan=2>Newa</td></tr>
+<tr><td colspan=2>Nko</td></tr>
+<tr><td colspan=2>Nushu</td></tr>
+<tr><td colspan=2>Nyiakeng_Puachue_Hmong</td></tr>
+<tr><td colspan=2>Ogham</td></tr>
+<tr><td colspan=2>Ol_Chiki</td></tr>
+<tr><td colspan=2>Old_Hungarian</td></tr>
+<tr><td colspan=2>Old_Italic</td></tr>
+<tr><td colspan=2>Old_North_Arabian</td></tr>
+<tr><td colspan=2>Old_Permic</td></tr>
+<tr><td colspan=2>Old_Persian</td></tr>
+<tr><td colspan=2>Old_Sogdian</td></tr>
+<tr><td colspan=2>Old_South_Arabian</td></tr>
+<tr><td colspan=2>Old_Turkic</td></tr>
+<tr><td colspan=2>Oriya</td></tr>
+<tr><td colspan=2>Osage</td></tr>
+<tr><td colspan=2>Osmanya</td></tr>
+<tr><td colspan=2>Pahawh_Hmong</td></tr>
+<tr><td colspan=2>Palmyrene</td></tr>
+<tr><td colspan=2>Pau_Cin_Hau</td></tr>
+<tr><td colspan=2>Phags_Pa</td></tr>
+<tr><td colspan=2>Phoenician</td></tr>
+<tr><td colspan=2>Psalter_Pahlavi</td></tr>
+<tr><td colspan=2>Rejang</td></tr>
+<tr><td colspan=2>Runic</td></tr>
+<tr><td colspan=2>Samaritan</td></tr>
+<tr><td colspan=2>Saurashtra</td></tr>
+<tr><td colspan=2>Sharada</td></tr>
+<tr><td colspan=2>Shavian</td></tr>
+<tr><td colspan=2>Siddham</td></tr>
+<tr><td colspan=2>SignWriting</td></tr>
+<tr><td colspan=2>Sinhala</td></tr>
+<tr><td colspan=2>Sogdian</td></tr>
+<tr><td colspan=2>Sora_Sompeng</td></tr>
+<tr><td colspan=2>Soyombo</td></tr>
+<tr><td colspan=2>Sundanese</td></tr>
+<tr><td colspan=2>Syloti_Nagri</td></tr>
+<tr><td colspan=2>Syriac</td></tr>
+<tr><td colspan=2>Tagalog</td></tr>
+<tr><td colspan=2>Tagbanwa</td></tr>
+<tr><td colspan=2>Tai_Le</td></tr>
+<tr><td colspan=2>Tai_Tham</td></tr>
+<tr><td colspan=2>Tai_Viet</td></tr>
+<tr><td colspan=2>Takri</td></tr>
+<tr><td colspan=2>Tamil</td></tr>
+<tr><td colspan=2>Tangut</td></tr>
+<tr><td colspan=2>Telugu</td></tr>
+<tr><td colspan=2>Thaana</td></tr>
+<tr><td colspan=2>Thai</td></tr>
+<tr><td colspan=2>Tibetan</td></tr>
+<tr><td colspan=2>Tifinagh</td></tr>
+<tr><td colspan=2>Tirhuta</td></tr>
+<tr><td colspan=2>Ugaritic</td></tr>
+<tr><td colspan=2>Vai</td></tr>
+<tr><td colspan=2>Wancho</td></tr>
+<tr><td colspan=2>Warang_Citi</td></tr>
+<tr><td colspan=2>Yi</td></tr>
+<tr><td colspan=2>Zanabazar_Square</td></tr>
<tr><td></td></tr>
<tr><td colspan=2><b>Vim character classes:</b></td></tr>
<tr><td><code><font color=#808080>\i</font></code></td><td>identifier character <font size=-2>VIM</font></td></tr>
