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66 lines
1.8 KiB
C++
66 lines
1.8 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/assert.hpp>
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#include <boost/hana/detail/constexpr.hpp>
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#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/range.hpp>
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#include <boost/hana/tuple.hpp>
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using namespace boost::hana;
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int main() {
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{
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//! [comparable]
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// empty ranges are equal
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BOOST_HANA_CONSTANT_CHECK(range(int_<6>, int_<6>) == range(int_<0>, int_<0>));
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// otherwise, ranges are equal if and only if they span the same interval
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BOOST_HANA_CONSTANT_CHECK(range(int_<2>, int_<5>) == range(int_<2>, int_<5>));
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BOOST_HANA_CONSTANT_CHECK(range(int_<0>, int_<3>) != range(int_<-1>, int_<3>));
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//! [comparable]
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}{
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//! [foldable]
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BOOST_HANA_CONSTANT_CHECK(foldl(range(int_<0>, int_<4>), int_<0>, plus) == int_<6>);
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BOOST_HANA_CONSTANT_CHECK(unpack(range(int_<-2>, int_<2>), tuple) == tuple(int_<-2>, int_<-1>, int_<0>, int_<1>));
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//! [foldable]
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}{
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//! [iterable]
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constexpr auto r = range(int_<0>, int_<1000>);
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BOOST_HANA_CONSTANT_CHECK(head(r) == int_<0>);
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BOOST_HANA_CONSTANT_CHECK(last(r) == int_<999>);
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BOOST_HANA_CONSTANT_CHECK(!is_empty(r));
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BOOST_HANA_CONSTANT_CHECK(is_empty(range(int_<3>, int_<3>)));
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//! [iterable]
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}{
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//! [range_c]
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BOOST_HANA_CONSTANT_CHECK(head(range_c<int, 0, 5>) == int_<0>);
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BOOST_HANA_CONSTANT_CHECK(last(range_c<unsigned long, 0, 5>) == ulong<4>);
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BOOST_HANA_CONSTANT_CHECK(tail(range_c<int, 0, 5>) == range(int_<1>, int_<5>));
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//! [range_c]
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}{
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//! [range]
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using namespace literals;
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BOOST_HANA_CONSTANT_CHECK(head(range(0_c, 5_c)) == 0_c);
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BOOST_HANA_CONSTANT_CHECK(last(range(0_c, 5_c)) == 4_c);
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BOOST_HANA_CONSTANT_CHECK(tail(range(0_c, 5_c)) == range(1_c, 5_c));
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//! [range]
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}
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}
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