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28 lines
848 B
C++
28 lines
848 B
C++
/*
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@copyright Louis Dionne 2015
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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/equal.hpp>
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#include <boost/hana/tap.hpp>
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#include <boost/hana/tuple.hpp>
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#include <sstream>
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namespace hana = boost::hana;
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int main() {
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std::stringstream before, after;
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auto xs = hana::make_tuple(1, 2, 3)
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| hana::tap<hana::tuple_tag>([&](auto x) { before << x << ' '; })
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| [](auto x) { return hana::make_tuple(x, -x); }
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| hana::tap<hana::tuple_tag>([&](auto x) { after << x << ' '; });
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BOOST_HANA_RUNTIME_CHECK(before.str() == "1 2 3 ");
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BOOST_HANA_RUNTIME_CHECK(after.str() == "1 -1 2 -2 3 -3 ");
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BOOST_HANA_RUNTIME_CHECK(xs == hana::make_tuple(1, -1, 2, -2, 3, -3));
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}
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