mirror of
https://github.com/boostorg/hana.git
synced 2026-02-22 15:32:11 +00:00
40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
/*
|
|
@copyright Louis Dionne 2014
|
|
Distributed under the Boost Software License, Version 1.0.
|
|
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
|
|
*/
|
|
|
|
#include <boost/hana/iterable/mcd.hpp>
|
|
|
|
#include <boost/hana/detail/constexpr.hpp>
|
|
#include <boost/hana/detail/minimal/comparable.hpp>
|
|
#include <boost/hana/detail/minimal/iterable.hpp>
|
|
#include <boost/hana/detail/static_assert.hpp>
|
|
|
|
#include <tuple>
|
|
using namespace boost::hana;
|
|
|
|
|
|
BOOST_HANA_CONSTEXPR_LAMBDA auto f = [](auto x, auto s) {
|
|
return std::make_tuple(x, s);
|
|
};
|
|
|
|
template <int i>
|
|
constexpr auto x = detail::minimal::comparable<>(i);
|
|
|
|
template <typename mcd>
|
|
void test() {
|
|
constexpr auto iterable = detail::minimal::iterable<mcd>;
|
|
constexpr auto s = x<-1>;
|
|
|
|
BOOST_HANA_STATIC_ASSERT(foldr(f, s, iterable()) == s);
|
|
BOOST_HANA_STATIC_ASSERT(foldr(f, s, iterable(x<0>)) == f(x<0>, s));
|
|
BOOST_HANA_STATIC_ASSERT(foldr(f, s, iterable(x<0>, x<1>)) == f(x<0>, f(x<1>, s)));
|
|
BOOST_HANA_STATIC_ASSERT(foldr(f, s, iterable(x<0>, x<1>, x<2>)) == f(x<0>, f(x<1>, f(x<2>, s))));
|
|
BOOST_HANA_STATIC_ASSERT(foldr(f, s, iterable(x<0>, x<1>, x<2>, x<3>)) == f(x<0>, f(x<1>, f(x<2>, f(x<3>, s)))));
|
|
}
|
|
|
|
int main() {
|
|
test<Iterable::mcd>();
|
|
}
|