On Mon, April 23, 2007 19:34, Joaquín Mª López Muñoz wrote:
I don't know what the problem is but it looks like there's more to it than you described. Please see the attached compilable snippet mimicking your scenario: it works OK for GCC 3.2, and it uses the string const& version of create_type(). Do you observe otherwise? When you say that the former fails: do you mean you get a compiler error? If so, what's it like?
Well, what I mean is the following sample: #include <boost/array.hpp> #include <boost/multi_index_container.hpp> #include <boost/multi_index/hashed_index.hpp> #include <boost/multi_index/member.hpp> #include <utility> #include <string> #include <iostream> namespace mi=boost::multi_index; typedef int some_type; typedef std::pair<std::string, some_type const*> key_value_pair; //actually this is a predefined type boost::array<key_value_pair, 5> predefined_types = { key_value_pair("test1", NULL) , key_value_pair("test2", NULL) , key_value_pair("test3", NULL) , key_value_pair("test4", NULL) , key_value_pair("test5", NULL) }; struct hash{}; //tag used to retrieve values typedef mi::multi_index_container < key_value_pair, mi::indexed_by < mi::hashed_unique < mi::tag<hash>, BOOST_MULTI_INDEX_MEMBER(key_value_pair, std::string, first) >
types_map;
types_map types_(predefined_types.begin(), predefined_types.end()); inline void create_type(std::string const& name) { types_.insert(std::make_pair<std::string, some_type const*>(name, NULL)); } inline bool has_type(std::string const& name) { types_map::index<hash>::type::const_iterator i=types_.get<hash>().find(name), end = types_.get<hash>().end(); return i!=end; } int main() { //std::string s("hello"); //create_type(s); std::string s2("test3"); std::cout << "multi_index instance contains string \""+s2+"\": " << (has_type(s2)?"yes":"no"); } But in a clean environment it works fine and 'has_type' finds the string. May be I have some globally available identifier, which returns the wrong string, and therefore fails... I will double check it and get back to this post if I identify smth. Many thanks for your great support! With Kind Regards, Ovanes Markarian