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36 lines
1.1 KiB
C++
36 lines
1.1 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/detail/constexpr.hpp>
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#include <boost/hana/detail/static_assert.hpp>
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#include <boost/hana/functional.hpp>
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#include <boost/hana/list.hpp>
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#include <boost/hana/maybe.hpp>
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#include <boost/hana/trait.hpp>
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#include <boost/hana/type.hpp>
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using namespace boost::hana;
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int main() {
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//! [fusion]
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//! @todo `compose(trait::..., decltype_)` is too verbose. Find an elegant
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//! way to make this easier.
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BOOST_HANA_STATIC_ASSERT(
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find(compose(trait::is_integral, decltype_), list(1.0, 2)) == just(2)
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);
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BOOST_HANA_STATIC_ASSERT(
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find(compose(trait::is_class, decltype_), list(1.0, 2)) == nothing
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);
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//! [fusion]
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//! [mpl]
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BOOST_HANA_CONSTEXPR_LAMBDA auto types = list_t<char, int, unsigned, long, unsigned long>;
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BOOST_HANA_STATIC_ASSERT(find(_ == type<unsigned>, types) == just(type<unsigned>));
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BOOST_HANA_STATIC_ASSERT(find(_ == type<void>, types) == nothing);
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//! [mpl]
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}
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