Bracket-Like Characters

In ICU4J, here is draft code that gets the opening and closing bracket-like characters. I threw them into a Map, but you can adapt it to the format you want. If you need C++, there are corresponding methods in ICU4C that do the same thing. For help, please join the icu-support mailing list.

static final UnicodeSet INITIAL_PUNCTUATION = new UnicodeSet("[[:Ps:][:Pi:]-[༺༼᚛‘‚‛“„‟〝]]").freeze();

private static <T extends Map<Integer, Integer>> T getMatchingBraces(T output) {

for (String start : INITIAL_PUNCTUATION) {

int startChar = start.codePointAt(0);

String end = UCharacter.getStringPropertyValue(UProperty.BIDI_MIRRORING_GLYPH, startChar, UProperty.NameChoice.SHORT);

if (end == null) {

continue;

}

output.put(startChar, end.codePointAt(0));

}

return output;

}

Known issues are listed at the end of this page.

Here is a listing:

( ) LEFT PARENTHESIS

[ ] LEFT SQUARE BRACKET

{ } LEFT CURLY BRACKET

⁅ ⁆ LEFT SQUARE BRACKET WITH QUILL

⁽ ⁾ SUPERSCRIPT LEFT PARENTHESIS

₍ ₎ SUBSCRIPT LEFT PARENTHESIS

〈 〉 LEFT-POINTING ANGLE BRACKET

❨ ❩ MEDIUM LEFT PARENTHESIS ORNAMENT

❪ ❫ MEDIUM FLATTENED LEFT PARENTHESIS ORNAMENT

❬ ❭ MEDIUM LEFT-POINTING ANGLE BRACKET ORNAMENT

❮ ❯ HEAVY LEFT-POINTING ANGLE QUOTATION MARK ORNAMENT

❰ ❱ HEAVY LEFT-POINTING ANGLE BRACKET ORNAMENT

❲ ❳ LIGHT LEFT TORTOISE SHELL BRACKET ORNAMENT

❴ ❵ MEDIUM LEFT CURLY BRACKET ORNAMENT

⟅ ⟆ LEFT S-SHAPED BAG DELIMITER

⟦ ⟧ MATHEMATICAL LEFT WHITE SQUARE BRACKET

⟨ ⟩ MATHEMATICAL LEFT ANGLE BRACKET

⟪ ⟫ MATHEMATICAL LEFT DOUBLE ANGLE BRACKET

⟬ ⟭ MATHEMATICAL LEFT WHITE TORTOISE SHELL BRACKET

⟮ ⟯ MATHEMATICAL LEFT FLATTENED PARENTHESIS

⦃ ⦄ LEFT WHITE CURLY BRACKET

⦅ ⦆ LEFT WHITE PARENTHESIS

⦇ ⦈ Z NOTATION LEFT IMAGE BRACKET

⦉ ⦊ Z NOTATION LEFT BINDING BRACKET

⦋ ⦌ LEFT SQUARE BRACKET WITH UNDERBAR

⦍ ⦐ LEFT SQUARE BRACKET WITH TICK IN TOP CORNER

⦏ ⦎ LEFT SQUARE BRACKET WITH TICK IN BOTTOM CORNER

⦑ ⦒ LEFT ANGLE BRACKET WITH DOT

⦓ ⦔ LEFT ARC LESS-THAN BRACKET

⦕ ⦖ DOUBLE LEFT ARC GREATER-THAN BRACKET

⦗ ⦘ LEFT BLACK TORTOISE SHELL BRACKET

⧘ ⧙ LEFT WIGGLY FENCE

⧚ ⧛ LEFT DOUBLE WIGGLY FENCE

⧼ ⧽ LEFT-POINTING CURVED ANGLE BRACKET

⸂ ⸃ LEFT SUBSTITUTION BRACKET

⸄ ⸅ LEFT DOTTED SUBSTITUTION BRACKET

⸉ ⸊ LEFT TRANSPOSITION BRACKET

⸌ ⸍ LEFT RAISED OMISSION BRACKET

⸜ ⸝ LEFT LOW PARAPHRASE BRACKET

⸠ ⸡ LEFT VERTICAL BAR WITH QUILL

⸢ ⸣ TOP LEFT HALF BRACKET

⸤ ⸥ BOTTOM LEFT HALF BRACKET

⸦ ⸧ LEFT SIDEWAYS U BRACKET

⸨ ⸩ LEFT DOUBLE PARENTHESIS

〈 〉 LEFT ANGLE BRACKET

《 》 LEFT DOUBLE ANGLE BRACKET

「 」 LEFT CORNER BRACKET

『 』 LEFT WHITE CORNER BRACKET

【 】 LEFT BLACK LENTICULAR BRACKET

〔 〕 LEFT TORTOISE SHELL BRACKET

〖 〗 LEFT WHITE LENTICULAR BRACKET

〘 〙 LEFT WHITE TORTOISE SHELL BRACKET

〚 〛 LEFT WHITE SQUARE BRACKET

﹙ ﹚ SMALL LEFT PARENTHESIS

﹛ ﹜ SMALL LEFT CURLY BRACKET

﹝ ﹞ SMALL LEFT TORTOISE SHELL BRACKET

（ ） FULLWIDTH LEFT PARENTHESIS

［ ］ FULLWIDTH LEFT SQUARE BRACKET

｛ ｝ FULLWIDTH LEFT CURLY BRACKET

｟ ｠ FULLWIDTH LEFT WHITE PARENTHESIS

｢ ｣ HALFWIDTH LEFT CORNER BRACKET

(see below)

Known Issues

The characters http://unicode.org/cldr/utility/list-unicodeset.jsp?a=[༺༼᚛‘‚‛“„‟〝] were removed by hand; that list would have to be updated for each release of Unicode.

The following may also behave like the curly quotes, and should be removed from the above (or, rather, have their language-specific behavior in an environment that permits it).

‹ › SINGLE LEFT-POINTING ANGLE QUOTATION MARK

« » LEFT-POINTING DOUBLE ANGLE QUOTATION MARK

The code doesn't generate the right results for the following, so they would also need to be hand-tuned to fix them.

﴾ ﴾ ORNATE LEFT PARENTHESIS

︗ ︗ PRESENTATION FORM FOR VERTICAL LEFT WHITE LENTICULAR BRACKET

︵ ︵ PRESENTATION FORM FOR VERTICAL LEFT PARENTHESIS

︷ ︷ PRESENTATION FORM FOR VERTICAL LEFT CURLY BRACKET

︹ ︹ PRESENTATION FORM FOR VERTICAL LEFT TORTOISE SHELL BRACKET

︻ ︻ PRESENTATION FORM FOR VERTICAL LEFT BLACK LENTICULAR BRACKET

︽ ︽ PRESENTATION FORM FOR VERTICAL LEFT DOUBLE ANGLE BRACKET

︿ ︿ PRESENTATION FORM FOR VERTICAL LEFT ANGLE BRACKET

﹁ ﹁ PRESENTATION FORM FOR VERTICAL LEFT CORNER BRACKET

﹃ ﹃ PRESENTATION FORM FOR VERTICAL LEFT WHITE CORNER BRACKET

﹇ ﹇ PRESENTATION FORM FOR VERTICAL LEFT SQUARE BRACKET