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54 lines
1.9 KiB
C++
54 lines
1.9 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/bool.hpp>
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#include <boost/hana/comparable/comparable.hpp>
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#include <boost/hana/core/is_a.hpp>
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#include <boost/hana/detail/assert.hpp>
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#include <boost/hana/detail/constexpr.hpp>
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#include <boost/hana/ext/std/tuple.hpp>
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#include <boost/hana/foreign.hpp>
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#include <boost/hana/integral.hpp>
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#include <boost/hana/iterable/iterable.hpp>
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#include <boost/hana/logical/logical.hpp>
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#include <boost/hana/maybe.hpp>
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#include <boost/hana/monad/monad.hpp>
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#include <boost/hana/range.hpp>
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#include <boost/hana/tuple.hpp>
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#include <tuple>
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using namespace boost::hana;
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int main() {
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//! [standard]
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BOOST_HANA_CONSTANT_ASSERT( is_a<Foldable, Maybe>);
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BOOST_HANA_CONSTANT_ASSERT(!is_a<Logical, Maybe>);
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BOOST_HANA_CONSTANT_ASSERT(!is_a<Foldable, int>);
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BOOST_HANA_CONSTANT_ASSERT( are<Comparable, int, long>);
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//! [standard]
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//! [alternate]
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BOOST_HANA_CONSTEXPR_LAMBDA auto row = tuple;
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BOOST_HANA_CONSTEXPR_LAMBDA auto check_table = [](auto ...headers) {
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return [=](auto ...rows) {
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auto row_is_correct = [=](auto row) {
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return tuple(headers(head(row))...) == tail(row);
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};
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BOOST_HANA_CONSTANT_ASSERT(all(tuple(rows...), row_is_correct));
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};
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};
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check_table( is_a<Logical>, is_an<Iterable>, is_a<Monad> )(
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row(just(1), false_, false_, true_ ),
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row(tuple(1, '2', 3.3), false_, true_, true_ ),
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row(std::make_tuple("abc", 'd'), false_, true_, true_ ),
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row(long_<12>, true_, false_, false_ ),
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row(range(int_<-4>, int_<15>), false_, true_, false_ )
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);
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//! [alternate]
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}
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