![]() ![]() For example, if the text "red king" is matched against the pattern: ![]() That is, if an open parenthesis is followed by "?:", the subpattern matched by that pair of parentheses is not counted when computing the backreferences. BBEdit now supports non-capturing parentheses, using the syntax: Sometimes, however, parentheses are needed for only for clustering, not capturing. Is matched against the text "red king", the backreferences will be set as follows: For example, if the following grep pattern: Opening parentheses are counted from left to right to determine the numbers of the captured subpatterns. The portion of the matching pattern contained within the first pair of parentheses is available in the backreference \1, the second in \2, etc. For example, to match any run of non-digit characters:Īs in previous versions of BBEdit, bare parentheses cluster and capture the subpatterns they contain. Another Perl extension supported by BBEdit is negated POSIX-style character classes, which are indicated by a ^ after the colon. The names "ascii" and "word" are Perl extensions the others are defined by the POSIX standard. , without enclosing square brackets, is just a character class consisting of the characters `:', 'a', 'c', 'e', 'p', and 's'. It is easy to forget that POSIX-style character classes are only available inside regular character classes. POSIX-style character class names are case-sensitive. Print printing characters, including space Graph printing characters, excluding space , and are only available inside regular character classes (in other words, inside another set of square brackets). ![]() In replacement patterns, \0 is a backreference to theĮntire match (exactly equivalent to '
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