Mighty Bimap

| Home | Libraries | People | FAQ | More

### Mighty Bimap

This is the translator example from the tutorial. In this example the collection type of relation is changed to allow the iteration of the container.

Go to source code

    #include <iostream>
    #include <string>
    #include <boost/bimap/bimap.hpp>
    #include <boost/bimap/list_of.hpp>
    #include <boost/bimap/unordered_set_of.hpp>

    struct english {};
    struct spanish {};

    int main()
    {
        using namespace boost::bimaps;

        typedef bimap
        <
            unordered_set_of< tagged< std::string, spanish > >,
            unordered_set_of< tagged< std::string, english > >,
            list_of_relation

        > translator;

        translator trans;

        // We have to use `push_back` because the collection of relations is
        // a `list_of_relation`

        trans.push_back( translator::value_type("hola"  ,"hello"   ) );
        trans.push_back( translator::value_type("adios" ,"goodbye" ) );
        trans.push_back( translator::value_type("rosa"  ,"rose"    ) );
        trans.push_back( translator::value_type("mesa"  ,"table"   ) );

        std::cout << "enter a word" << std::endl;
        std::string word;
        std::getline(std::cin,word);

        // Search the queried word on the from index (Spanish)

        translator::map_by<spanish>::const_iterator is
            = trans.by<spanish>().find(word);

        if( is != trans.by<spanish>().end() )
        {
            std::cout << word << " is said "
                      << is->get<english>()
                      << " in English" << std::endl;
        }
        else
        {
            // Word not found in Spanish, try our luck in English

            translator::map_by<english>::const_iterator ie
                = trans.by<english>().find(word);

            if( ie != trans.by<english>().end() )
            {
                std::cout << word << " is said "
                          << ie->get<spanish>()
                          << " in Spanish" << std::endl;
            }
            else
            {
                // Word not found, show the possible translations

                std::cout << "No such word in the dictionary"      << std::endl;
                std::cout << "These are the possible translations" << std::endl;

                for( translator::const_iterator
                        i = trans.begin(),
                        i_end = trans.end();

                        i != i_end ; ++i )
                {
                    std::cout << i->get<spanish>()
                              << " <---> "
                              << i->get<english>()
                              << std::endl;
                }
            }
        }
        return 0;
    }