algorithm/string -- find_all_regex() gives a compiler error when the result container is vector<iterator_range<string::iterator>>

Start by reproducing the supplied call to boost::find_all_regex with std::vector<boost::iterator_rangestd::string::iterator> and compare it with the std::vectorstd::string case. Read the linked find_all_regex documentation and the function's implementation; done means resolving the documented container mismatch or clearly correcting the documentation, with the reported example covered if tests are available.

The doc says that the container we should pass to this function can be std::vector<boost::iterator_rangestd::string::iterator>. But when I run the program it gives a compile error. But when the result container passed, is a std::vectorstd::string, everything works fine.

First code snippet is using std::vector<boost::iterator_rangestd::string::iterator> as the result.

#include "boost/algorithm/string/split.hpp"
#include "boost/range/iterator_range_core.hpp"
#include <iostream>
#include <boost/algorithm/string.hpp>
#include <boost/algorithm/string/regex.hpp>
#include <vector>

int main(int, char**) {
    
    std::string s("Hello world");
    boost::regex regex("\\w");

    std::vector<boost::iterator_range<std::string::iterator>> result;
    boost::find_all_regex(result, s, regex);

}

Following is the last 3 lines of the compiler error. The whole error is too long.

c:\mingw\include\c++\9.2.0\bits\stl_iterator.h:787:11: note: no known conversion for argument 1 from '__gnu_cxx::__normal_iterator<const char*, std::__cxx11::basic_string >' to 'const __gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string >&'

c:\mingw\include\c++\9.2.0\bits\stl_iterator.h:787:11: note: candidate: 'constexpr __gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string >::__normal_iterator(__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string >&&)'

c:\mingw\include\c++\9.2.0\bits\stl_iterator.h:787:11: note: no known conversion for argument 1 from '__gnu_cxx::__normal_iterator<const char*, std::__cxx11::basic_string >' to '__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string >&&'

Also I ran the same program in Clang compiler too. Still the same result.

But when I run the following program with the container as std::vectorstd::string everything works without a hitch.

#include "boost/algorithm/string/split.hpp"
#include "boost/range/iterator_range_core.hpp"
#include <iostream>
#include <boost/algorithm/string.hpp>
#include <boost/algorithm/string/regex.hpp>
#include <string>
#include <vector>

int main(int, char**) {
    
    std::string s("Hello world");
    boost::regex regex("\\w");

    std::vector<std::string> result;
    boost::find_all_regex(result, s, regex);

}