int compare_string(Left const &l,Char const *begin)
{
Char const *end = begin;
while(*end!=0)
end++;
return compare_text(l.begin(),l.end(),begin,end);
}
int compare_text(Left const &l,Right const &r)
{
return compare_text(l.begin(),l.end(),r.begin(),r.end());
}