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31 lines
883 B
C++
31 lines
883 B
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/detail/constexpr.hpp>
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#include <boost/hana/detail/static_assert.hpp>
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#include <boost/hana/list.hpp>
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#include <boost/hana/maybe.hpp>
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#include <type_traits>
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using namespace boost::hana;
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//! @todo
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//! This is unsatisfying. We should be able to say something
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//! like `lift<std::is_integral>`.
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BOOST_HANA_CONSTEXPR_LAMBDA auto is_integral = [](auto x) {
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return bool_<std::is_integral<decltype(x)>::value>;
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};
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BOOST_HANA_CONSTEXPR_LAMBDA auto is_class = [](auto x) {
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return bool_<std::is_class<decltype(x)>::value>;
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};
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int main() {
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BOOST_HANA_STATIC_ASSERT(find(is_integral, list(1.0, 2)) == just(2));
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BOOST_HANA_STATIC_ASSERT(find(is_class, list(1.0, 2)) == nothing);
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}
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