Discussion :

[simoelasimo]

bonjour,

j' ai un probleme avec for_each ou peu etre pas?

voici mon code

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
 
bool          parse_page::regex_callback(const boost::match_results<std::string::const_iterator>& what)
{
  this->a++;
  cout << what[0] << endl;
  cout << what[1] << endl;
  cout << what[2] << endl;
  return true;
}
 
void          parse_page::find_url(string page)
{
  boost::regex expression("<a href=\"(/|\\./|\\.)?([^\"]*)\"");
  boost::sregex_iterator m1(page.begin(), page.end(), expression);
  boost::sregex_iterator m2;
  for_each(m1, m2, &parse_page::regex_callback);
  cout << "nb_link; " << a << endl;
}

et voici l erreur de compilation qui pose probleme

g++ parse_page.cpp wgetter.cpp main.cpp -lboost_regex -lboost_system -lpthread
/usr/include/c++/4.3/bits/stl_algo.h: In function ‘_Funct std::for_each(_IIter, _IIter, _Funct) [with _IIter = boost::regex_iterator<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >, _Funct = bool (parse_page::*)(const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&)]’:
parse_page.cpp:25: instantiated from here
/usr/include/c++/4.3/bits/stl_algo.h:3791: error: must use ‘.*’ or ‘->*’ to call pointer-to-member function in ‘__f (...)’
make: *** [all] Erreur 1

comprend pas besoin d aide

j ai essayer en suivant le tuto http://r0d.developpez.com/articles/algos-stl/#LI-C

mais ca veu toujour pas avez vous des idee a ce sujet?

[3DArchi]

Bonjour,
Ton problème est dans le foncteur du for_each:

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

 for_each(m1, m2, &parse_page::regex_callback);

Pour une fonction membre, passe par un bind pour créé un foncteur:

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

 for_each(m1, m2,boost::bind(&parse_page::regex_callback,_1));

[simoelasimo]

merci de votre reponse

mais ca ne fonctionne toujour pas

g++ parse_page.cpp wgetter.cpp main.cpp -lboost_regex -lboost_system -lpthread -lboost
/usr/include/boost/mem_fn.hpp: In member function ‘const R& boost::_mfi::dm<R, T>::call(U&, const void*) const [with U = const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >, R = bool ()(const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&), T = parse_page]’:
/usr/include/boost/mem_fn.hpp:352: instantiated from ‘const R& boost::_mfi::dm<R, T>::operator()(const U&) const [with U = boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >, R = bool ()(const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&), T = parse_page]’
/usr/include/boost/bind.hpp:222: instantiated from ‘R boost::_bi::list1<A1>::operator()(boost::_bi::type<R>, F&, A&, long int) [with R = bool (&)(const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&), F = boost::_mfi::dm<bool ()(const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&), parse_page>, A = boost::_bi::list1<const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&>, A1 = boost::arg<1>]’
/usr/include/boost/bind/bind_template.hpp:47: instantiated from ‘typename boost::_bi::result_traits<R, F>::type boost::_bi::bind_t<R, F, L>::operator()(const A1&) [with A1 = boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >, R = bool (&)(const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&), F = boost::_mfi::dm<bool ()(const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&), parse_page>, L = boost::_bi::list1<boost::arg<1> >]’
/usr/include/c++/4.3/bits/stl_algo.h:3791: instantiated from ‘_Funct std::for_each(_IIter, _IIter, _Funct) [with _IIter = boost::regex_iterator<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, char, boost::regex_traits<char, boost::cpp_regex_traits<char> > >, _Funct = boost::_bi::bind_t<bool (&)(const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&), boost::_mfi::dm<bool ()(const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&), parse_page>, boost::_bi::list1<boost::arg<1> > >]’
parse_page.cpp:26: instantiated from here
/usr/include/boost/mem_fn.hpp:333: error: no matching function for call to ‘get_pointer(const boost::match_results<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > >&)’

[3DArchi]

(Décidément, je suis fatigué ce matin).
C'est plutôt quelque chose comme ça:

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

for_each(m1, m2,boost::bind(&parse_page::regex_callback,this,_1));

[simoelasimo]

merci