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Unroll mp_fold.

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This commit is contained in:
Peter Dimov
2017-03-24 17:21:38 +02:00
parent 2bf9bad934
commit e488469e9a
2 changed files with 26 additions and 0 deletions
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21
test/mp_fold.cpp
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@@ -9,6 +9,7 @@
#include <boost/mp11/algorithm.hpp>
#include <boost/mp11/list.hpp>
#include <boost/mp11/integral.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
#include <tuple>
@@ -53,5 +54,25 @@ int main()
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold<std::tuple<X1, X2, X3, X4>, mp_list<>, mp_push_front>, mp_list<X4, X3, X2, X1>>));
}
using boost::mp11::mp_iota_c;
using boost::mp11::mp_reverse;
using boost::mp11::mp_size_t;
using boost::mp11::mp_plus;
{
int const N = 37;
using L = mp_iota_c<N>;
using R1 = mp_fold<L, mp_list<>, mp_push_back>;
BOOST_TEST_TRAIT_TRUE((std::is_same<R1, L>));
using R2 = mp_fold<L, mp_list<>, mp_push_front>;
BOOST_TEST_TRAIT_TRUE((std::is_same<R2, mp_reverse<L>>));
using R3 = mp_fold<L, mp_size_t<0>, mp_plus>;
BOOST_TEST_TRAIT_TRUE((std::is_same<R3, mp_size_t<N*(N-1)/2>>));
}
return boost::report_errors();
}