30 lines
844 B
C++
30 lines
844 B
C++
// Copyright Louis Dionne 2013-2017
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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/assert.hpp>
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#include <boost/hana/define_struct.hpp>
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#include <boost/hana/fold_left.hpp>
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#include <boost/hana/second.hpp>
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namespace hana = boost::hana;
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struct Classroom {
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BOOST_HANA_DEFINE_STRUCT(Classroom,
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(unsigned short, boys),
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(unsigned short, girls)
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);
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};
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int main() {
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constexpr Classroom compsci{20, 3};
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BOOST_HANA_CONSTEXPR_CHECK(
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hana::fold_left(compsci, 0, [](auto total, auto member) {
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// first(member) is the name of the member, here
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// "boys" or "girls", and second(member) is its value.
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return hana::second(member) + total;
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}) == 23
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);
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}
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