mirror of
https://github.com/boostorg/hana.git
synced 2026-02-21 15:12:21 +00:00
42 lines
1.5 KiB
C++
42 lines
1.5 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/functional.hpp>
|
|
|
|
#include <boost/hana/detail/assert.hpp>
|
|
#include <boost/hana/detail/constexpr.hpp>
|
|
#include <boost/hana/detail/minimal/comparable.hpp>
|
|
|
|
#include <tuple>
|
|
using namespace boost::hana;
|
|
|
|
|
|
BOOST_HANA_CONSTEXPR_LAMBDA auto f = [](auto ...x) {
|
|
return std::make_tuple('f', x...);
|
|
};
|
|
|
|
BOOST_HANA_CONSTEXPR_LAMBDA auto g = [](auto x) {
|
|
return std::make_tuple('g', x);
|
|
};
|
|
|
|
template <int i>
|
|
constexpr auto x = detail::minimal::comparable<>(i);
|
|
|
|
int main() {
|
|
BOOST_HANA_CONSTEXPR_ASSERT(on(f, g)() == f());
|
|
BOOST_HANA_CONSTEXPR_ASSERT(on(f, g)(x<0>) == f(g(x<0>)));
|
|
BOOST_HANA_CONSTEXPR_ASSERT(on(f, g)(x<0>, x<1>) == f(g(x<0>), g(x<1>)));
|
|
BOOST_HANA_CONSTEXPR_ASSERT(on(f, g)(x<0>, x<1>, x<2>) == f(g(x<0>), g(x<1>), g(x<2>)));
|
|
BOOST_HANA_CONSTEXPR_ASSERT(on(f, g)(x<0>, x<1>, x<2>, x<3>) == f(g(x<0>), g(x<1>), g(x<2>), g(x<3>)));
|
|
|
|
// check the infix version
|
|
BOOST_HANA_CONSTEXPR_ASSERT((f ^on^ g)() == f());
|
|
BOOST_HANA_CONSTEXPR_ASSERT((f ^on^ g)(x<0>) == f(g(x<0>)));
|
|
BOOST_HANA_CONSTEXPR_ASSERT((f ^on^ g)(x<0>, x<1>) == f(g(x<0>), g(x<1>)));
|
|
BOOST_HANA_CONSTEXPR_ASSERT((f ^on^ g)(x<0>, x<1>, x<2>) == f(g(x<0>), g(x<1>), g(x<2>)));
|
|
BOOST_HANA_CONSTEXPR_ASSERT((f ^on^ g)(x<0>, x<1>, x<2>, x<3>) == f(g(x<0>), g(x<1>), g(x<2>), g(x<3>)));
|
|
}
|