101 lines
2.6 KiB
C++
101 lines
2.6 KiB
C++
/* Boost.MultiIndex example of functions used as key extractors.
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*
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* Copyright 2003-2008 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* See http://www.boost.org/libs/multi_index for library home page.
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*/
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#if !defined(NDEBUG)
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#define BOOST_MULTI_INDEX_ENABLE_INVARIANT_CHECKING
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#define BOOST_MULTI_INDEX_ENABLE_SAFE_MODE
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#endif
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#include <boost/multi_index_container.hpp>
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#include <boost/multi_index/global_fun.hpp>
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#include <boost/multi_index/mem_fun.hpp>
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#include <boost/multi_index/ordered_index.hpp>
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#include <iostream>
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#include <string>
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using namespace boost::multi_index;
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/* A name record consists of the given name (e.g. "Charlie")
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* and the family name (e.g. "Brown"). The full name, calculated
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* by name_record::name() is laid out in the "phonebook order"
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* family name + given_name.
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*/
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struct name_record
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{
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name_record(std::string given_name_,std::string family_name_):
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given_name(given_name_),family_name(family_name_)
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{}
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std::string name()const
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{
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std::string str=family_name;
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str+=" ";
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str+=given_name;
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return str;
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}
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private:
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std::string given_name;
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std::string family_name;
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};
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std::string::size_type name_record_length(const name_record& r)
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{
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return r.name().size();
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}
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/* multi_index_container with indices based on name_record::name()
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* and name_record_length().
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* See Compiler specifics: Use of const_mem_fun_explicit and
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* mem_fun_explicit for info on BOOST_MULTI_INDEX_CONST_MEM_FUN.
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*/
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typedef multi_index_container<
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name_record,
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indexed_by<
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ordered_unique<
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BOOST_MULTI_INDEX_CONST_MEM_FUN(name_record,std::string,name)
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>,
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ordered_non_unique<
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global_fun<const name_record&,std::string::size_type,name_record_length>
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>
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>
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> name_record_set;
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int main()
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{
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name_record_set ns;
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ns.insert(name_record("Joe","Smith"));
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ns.insert(name_record("Robert","Nightingale"));
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ns.insert(name_record("Robert","Brown"));
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ns.insert(name_record("Marc","Tuxedo"));
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/* list the names in ns in phonebook order */
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std::cout<<"Phonenook order\n"
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<<"---------------"<<std::endl;
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for(name_record_set::iterator it=ns.begin();it!=ns.end();++it){
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std::cout<<it->name()<<std::endl;
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}
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/* list the names in ns according to their length*/
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std::cout<<"\nLength order\n"
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<< "------------"<<std::endl;
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for(nth_index<name_record_set,1>::type::iterator it1=get<1>(ns).begin();
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it1!=get<1>(ns).end();++it1){
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std::cout<<it1->name()<<std::endl;
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}
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return 0;
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}
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