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28 lines
735 B
C++
28 lines
735 B
C++
// Copyright Louis Dionne 2013-2022
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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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#include <boost/hana/adjust_if.hpp>
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#include <boost/hana/assert.hpp>
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#include <boost/hana/config.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/tuple.hpp>
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namespace hana = boost::hana;
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BOOST_HANA_CONSTEXPR_LAMBDA auto negative = [](auto x) {
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return x < 0;
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};
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BOOST_HANA_CONSTEXPR_LAMBDA auto negate = [](auto x) {
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return -x;
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};
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int main() {
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BOOST_HANA_CONSTEXPR_CHECK(
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hana::adjust_if(hana::make_tuple(-3, -2, -1, 0, 1, 2, 3), negative, negate)
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==
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hana::make_tuple(3, 2, 1, 0, 1, 2, 3)
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);
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}
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