Boost C++ Application Development Cookbook - Second Edition

How to do it...

We do not really need a std::string class here, we only need some lightweight class that does not manage resources and only has a pointer to the character array and array's size. Boost has the boost::string_view class for that.

1. To use the boost::string_view class, include the following header:

#include <boost/utility/string_view.hpp>

2. Change the method's signature:

boost::string_view between(    boost::string_view input,    char starts,    char ends)

3. Change std::string to boost::string_view: everywhere inside the function body:

{    boost::string_view::const_iterator pos_beg         = std::find(input.cbegin(), input.cend(), starts);    if (pos_beg == input.cend()) {        return boost::string_view();    }    ++ pos_beg; boost::string_view::const_iterator ...