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29 lines
794 B
C++
29 lines
794 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/assert.hpp>
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#include <boost/hana/foreign.hpp>
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#include <boost/hana/tuple.hpp>
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#include <sstream>
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using namespace boost::hana;
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int main() {
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//! [main]
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std::stringstream before, after;
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auto xs = tuple(1, 2, 3)
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| tap<Tuple>([&](auto x) { before << x << ' '; })
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| [](auto x) { return tuple(x, -x); }
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| tap<Tuple>([&](auto x) { after << x << ' '; });
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BOOST_HANA_RUNTIME_ASSERT(before.str() == "1 2 3 ");
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BOOST_HANA_RUNTIME_ASSERT(after.str() == "1 -1 2 -2 3 -3 ");
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BOOST_HANA_RUNTIME_ASSERT(xs == tuple(1, -1, 2, -2, 3, -3));
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//! [main]
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}
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