Created
August 7, 2011 11:33
Revisions
-
randomphrase revised this gist
Apr 16, 2014 . 1 changed file with 3 additions and 4 deletions.There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -34,8 +34,8 @@ struct NumberInEnglish typedef char_<'-'> dash; typedef vector< string<>, // use Ones vector string<>, // use Teens vector string<'twen','ty'>, string<'thir','ty'>, string<'four','ty'>, @@ -76,8 +76,7 @@ struct NumberInEnglish typename copy< joint_view< typename push_back<typename at<Tens, divides<n, ten> >::type, dash>::type, typename at<Ones, modulus<n, ten> >::type>, back_inserter<string<> > >::type, typename at<Tens, divides<n, ten> >::type -
Aug 7, 2011 . 1 changed file with 13 additions and 6 deletions.There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -24,8 +24,11 @@ using namespace boost::mpl; template <typename n> struct NumberInEnglish { // Can't handle >= 100 BOOST_MPL_ASSERT(( less<n, int_<100> > )); typedef int_<10> ten; typedef int_<20> twenty; typedef char_<'-'> dash; @@ -91,10 +94,10 @@ struct ToString >::type type; }; BOOST_MPL_ASSERT(( equal< NumberInEnglish<int_<4> >::type, string<'four'> > )); BOOST_MPL_ASSERT(( equal< NumberInEnglish<int_<14> >::type, string<'four','teen'> > )); BOOST_MPL_ASSERT(( equal< NumberInEnglish<int_<20> >::type, string<'twen','ty'> > )); BOOST_MPL_ASSERT(( equal< NumberInEnglish<int_<44> >::type, string<'four','ty-f','our'> > )); template <typename n> struct CountBottles @@ -104,7 +107,7 @@ struct CountBottles typedef typename copy< joint_view< typename push_back< typename NumberInEnglish<n>::type, char_<' '> >::type, typename if_< equal_to<n, int_<1> >, Bottle, @@ -115,6 +118,10 @@ struct CountBottles >::type type; }; BOOST_MPL_ASSERT(( equal< CountBottles<int_<0> >::type, string<'no m','ore ','bott','les'> > )); BOOST_MPL_ASSERT(( equal< CountBottles<int_<1> >::type, string<'one ','bott','le'> > )); BOOST_MPL_ASSERT(( equal< CountBottles<int_<14> >::type, string<'four','teen',' bot','tles'> > )); template <typename n> struct Verse { -
Aug 7, 2011 .There are no files selected for viewing
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,186 @@ #include <boost/mpl/assert.hpp> #include <boost/mpl/at.hpp> #include <boost/mpl/back_inserter.hpp> #include <boost/mpl/copy.hpp> #include <boost/mpl/divides.hpp> #include <boost/mpl/empty_sequence.hpp> #include <boost/mpl/equal.hpp> #include <boost/mpl/equal_to.hpp> #include <boost/mpl/fold.hpp> #include <boost/mpl/for_each.hpp> #include <boost/mpl/if.hpp> #include <boost/mpl/joint_view.hpp> #include <boost/mpl/less.hpp> #include <boost/mpl/minus.hpp> #include <boost/mpl/modulus.hpp> #include <boost/mpl/push_back.hpp> #include <boost/mpl/range_c.hpp> #include <boost/mpl/string.hpp> #include <boost/mpl/transform.hpp> #include <boost/mpl/vector.hpp> #include <iostream> using namespace boost::mpl; template <typename n> struct ToString { typedef int_<10> ten; typedef int_<20> twenty; typedef char_<'-'> dash; typedef vector< string<>, // not used string<>, // not used string<'twen','ty'>, string<'thir','ty'>, string<'four','ty'>, string<'fift','y'>, string<'sixt','y'>, string<'seve','nty'>, string<'eigh','ty'>, string<'nine','ty'> > Tens; typedef vector< string<'no ','more'>, string<'one'>, string<'two'>, string<'thre','e'>, string<'four'>, string<'five'>, string<'six'>, string<'seve','n'>, string<'eigh','t'>, string<'nine'> > Ones; typedef vector< string<'ten'>, string<'elev','en'>, string<'twel','ve'>, string<'thir','teen'>, string<'four','teen'>, string<'fift','een'>, string<'sixt','een'>, string<'seve','ntee','n'>, string<'eigh','teen'>, string<'nine','teen'> > Teens; typedef if_< modulus<n, ten>, typename copy< joint_view< typename push_back<typename at<Tens, divides<n, ten> >::type, dash>::type, typename at<Ones, modulus<n, ten> >::type >, back_inserter<string<> > >::type, typename at<Tens, divides<n, ten> >::type > DoubleDigit; typedef typename if_< less<n, ten>, typename at<Ones, n>::type, typename if_< less<n, twenty>, typename at<Teens, minus<n, ten> >::type, typename DoubleDigit::type >::type >::type type; }; BOOST_MPL_ASSERT(( equal< ToString<int_<4> >::type, string<'four'> > )); BOOST_MPL_ASSERT(( equal< ToString<int_<14> >::type, string<'four','teen'> > )); BOOST_MPL_ASSERT(( equal< ToString<int_<20> >::type, string<'twen','ty'> > )); BOOST_MPL_ASSERT(( equal< ToString<int_<44> >::type, string<'four','ty-f','our'> > )); template <typename n> struct CountBottles { typedef string<'bott','le'> Bottle; typedef typename copy< joint_view< typename push_back< typename ToString<n>::type, char_<' '> >::type, typename if_< equal_to<n, int_<1> >, Bottle, push_back<Bottle, char_<'s'> >::type >::type >, back_inserter<string<> > >::type type; }; template <typename n> struct Verse { typedef string<'\n'> NL; typedef string<',\n'> CommaNL; typedef string<' of ','beer'> OfBeer; typedef string<' on ','the ','wall'> OnTheWall; typedef string<'take',' one',' dow','n, p','ass ','it a','roun','d,\n'> TakeOneDownPassItAround; typedef typename transform< vector< typename CountBottles<n>::type, OfBeer, OnTheWall, CommaNL, typename CountBottles<n>::type, OfBeer, CommaNL, TakeOneDownPassItAround, typename CountBottles<typename prior<n>::type>::type, OfBeer, NL, NL >, c_str<_1> >::type strings; }; struct PrintValue { PrintValue(std::ostream& os) : os_(os) {} std::ostream& os_; template <typename T> void operator() (T t) { os_ << T::value; } }; template <typename n> std::ostream& operator<< (std::ostream& os, Verse<n> verse) { boost::mpl::for_each<typename Verse<n>::strings>(PrintValue(os)); }; struct PrintTo { PrintTo(std::ostream& os) : os_(os) {} std::ostream& os_; template <typename T> void operator() (T t) { os_ << t; } }; int main() { boost::mpl::for_each< range_c<int, 1, 100>, lambda< Verse<minus<int_<100>, _1> > >::type>( PrintTo(std::cout)); return 0; }