Scroll to navigation

std::match_results::length(3) C++ Standard Libary std::match_results::length(3)

NAME

std::match_results::length - std::match_results::length

Synopsis


difference_type length( size_type n = 0 ) const; (since C++11)


Returns the length of the specified sub-match.


If n == 0, the length of the entire matched expression is returned.


If n > 0 && n < size(), the length of n^th sub-match is returned.


if n >= size(), a length of the unmatched match is returned.


The call is equivalent to (*this)[n].length().

Parameters


n - integral number specifying which match to examine

Return value


The length of the specified match or sub-match.

See also


operator[] returns specified sub-match
(public member function)
length returns the length of the match (if any)
(public member function of std::sub_match<BidirIt>)

2024.06.10 http://cppreference.com