operator<< (std::sub_match)

From cppreference.com
template < class CharT, class Traits, class BidirIt >

std:: basic_ostream < CharT,Traits > &
operator << ( std:: basic_ostream < CharT,Traits > & os,

const sub_match < BidirIt > & m ) ;
(since C++11)

Writes the representation of the matched subsequence m to the output stream os .

Equivalent to os << m. str ( ) .

Parameters

os - output stream to write the representation to
m - a sub-match object to output

Return value

os

Example