In PCRE2 I got a problem with regular expression /[⚓️]/. It has match for string "⛲️".
Unexpected behaviour persists only inside range.
Can somebody explain why is this happening?
By the way, PCRE1 works just fine: no matches.
Why fountain character matches anchor character in regular expression inside range?
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The
⚓️emoji is a sequence of two Unicode code points:\x{2693}\x{FE0F}. You can test it and see that\x{2693}\x{FE0F}regex matches⚓️.When you place the
\x{2693}\x{FE0F}into a character class, you find a match in both⛲️(=\x{26F2}\x{FE0F}) and⚓️since both contain at least one of the Unicode code points.As a workaround, place the emojis into a non-capturing group rather than a character class, e.g.
(?:⚓️|[a-z0-9])will match a⚓️or a lowercase ASCII letter/digit.