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slevithan/dot-codepoint.js

Created June 13, 2012 01:15
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Dot matches code point
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dot-codepoint.js
// Updated for XRegExp 3.0.0
// Make unescaped dots outside of character classes match any code point rather
// than code unit. Accounts for XRegExp's flag s (aka dotall or singleline).
XRegExp.addToken(/\./, function(match, scope, flags) {
return flags.indexOf("s") > -1 ?
"(?:[\ud800-\udbff][\udc00-\udfff]|[\0-\uffff])" :
"(?:[\ud800-\udbff][\udc00-\udfff]|[\0-\x09\x0b\x0c\x0e-\u2027\u202a-\uffff])";
});
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It should be obvious, but this requires XRegExp (GitHub). Surrogate pairs are used to match code points beyond the BMP (U+010000 to U+10ffff).

Following are the four line breaks not matched by dots unless flag s is used:

  • U+00000a — Line feed — \n
  • U+00000d — Carriage return — \r
  • U+002028 — Line separator
  • U+002029 — Paragraph separator

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