bitset Standard library class that holds a collection of bits of a size that is known at compile time, and provides operations to test and set the bits in the collection.
cmatch Container of csub_match objects that provides information about the match to a regex on const char* input sequences. The first element in the container describes the overall match results. The subsequent elements describe the results for the subexpressions.
cregex_iterator Like sregex_iterator except that it iterates over an array of char.
csub_match Type that holds the results of a regular expression match to a const char*. Can represent the entire match or a subexpression.