Re: Problem with regular expression (newbie). Solution

3 Apr 2003

      --- In Boost-Users@yahoogroups.com, "aitors2002" <aitors2002@y...> wrote:
...
Hello, the next program doesn't work. It should print all the lines except the ones starting with '#'.
It does work in perl : 
$ perl -ne 'print unless /^\s*\#/' a.cc
why ?
Thank you
                              aitor
-------------------
// a.cc
#include<iostream>
#include<fstream>
#include<string>
#include<vector>
#include<boost/regex.hpp>
int main() {
using namespace std;
ifstream f("a.cc");
  string l;
  vector<string> v;
  static const boost::regex r("^\\s*\\#", boost::regbase::escape_in_lists | 
                                                            boost::regbase::perl);
while(f) {
    getline(f,l,'\n');
    if (boost::regex_match(l,r)) continue;
    v.push_back(l);
  }
  for(vector<string>::const_iterator it = v.begin();
      it != v.end(); ++it)
    cout << *it << endl;
}
Hello again,

the problem was because of using regex_match instead of regex_search, 
since regex_match requires that the whole string matches.

Thank you for the help

                         aitor