\w+any word character, repeated at least once
\.the literal . (4610 / 568 / 2E16)
push_backthe literal text push_back (case sensitive) \(the literal ( (4010 / 508 / 2816)
.*?any character (except for line terminators), repeated any number of times
\1the text saved by group 1
.*?any character (except for line terminators), repeated any number of times
\)the literal ) (4110 / 518 / 2916)
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string