(
... )
or \(
... \)
)A group, also known as a subexpression, consists of an open-group operator, any number of other operators, and a close-group operator. Regex treats this sequence as a unit, just as mathematics and programming languages treat a parenthesized expression as a unit.
Therefore, using groups, you can:
|
or \|
)) or a repetition operator (see section Repetition Operators).
If the syntax bit RE_NO_BK_PARENS
is set, then `(' represents
the open-group operator and `)' represents the
close-group operator; otherwise, `\(' and `\)' do.
If the syntax bit RE_UNMATCHED_RIGHT_PAREN_ORD
is set and a
close-group operator has no matching open-group operator, then Regex
considers it to match `)'.
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