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42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
/*
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@copyright Louis Dionne 2014
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/hana/functional.hpp>
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#include <boost/hana/detail/constexpr.hpp>
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#include <boost/hana/detail/minimal/comparable.hpp>
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#include <boost/hana/detail/static_assert.hpp>
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#include <tuple>
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using namespace boost::hana;
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BOOST_HANA_CONSTEXPR_LAMBDA auto f = [](auto ...x) {
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return std::make_tuple('f', x...);
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};
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BOOST_HANA_CONSTEXPR_LAMBDA auto g = [](auto x) {
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return std::make_tuple('g', x);
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};
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template <int i>
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constexpr auto x = detail::minimal::comparable<>(i);
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int main() {
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BOOST_HANA_STATIC_ASSERT(on(f, g)() == f());
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BOOST_HANA_STATIC_ASSERT(on(f, g)(x<0>) == f(g(x<0>)));
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BOOST_HANA_STATIC_ASSERT(on(f, g)(x<0>, x<1>) == f(g(x<0>), g(x<1>)));
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BOOST_HANA_STATIC_ASSERT(on(f, g)(x<0>, x<1>, x<2>) == f(g(x<0>), g(x<1>), g(x<2>)));
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BOOST_HANA_STATIC_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>)));
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// check the infix version
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BOOST_HANA_STATIC_ASSERT((f /on/ g)() == f());
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BOOST_HANA_STATIC_ASSERT((f /on/ g)(x<0>) == f(g(x<0>)));
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BOOST_HANA_STATIC_ASSERT((f /on/ g)(x<0>, x<1>) == f(g(x<0>), g(x<1>)));
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BOOST_HANA_STATIC_ASSERT((f /on/ g)(x<0>, x<1>, x<2>) == f(g(x<0>), g(x<1>), g(x<2>)));
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BOOST_HANA_STATIC_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>)));
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}
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