This time, it does not apply to a dot but to a non-capturing group (? (The only exception is Tcl, which treats all groups inside lookahead as non-capturing.) We can safely do this because we know that a non-{character will never make us roll over the {END} delimiter. If it contains capturing groups then those groups will capture as normal and backreferences to them will work normally, even outside the lookahead. Using regular expressions on Windows hasn’t been particularly easy, as the standard command-line tools have provided very little support to these powerful beasts. The name can contain letters and numbers but must start with a letter. They allow you to apply regex operators to the entire grouped regex. are either pure, non-capturing groups that do not capture text and do not count towards the group total, or named-capturing group. Nice job! For good and for bad, for all times eternal, Group 2 is assigned to the second capture group from the left of the pattern as you read the regex. For example / (?
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