30 lines
785 B
C++
30 lines
785 B
C++
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// Copyright Jason Rice 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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#include <boost/hana/bool.hpp>
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#include <boost/hana/find_if.hpp>
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#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/map.hpp>
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namespace hana = boost::hana;
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struct is_last {
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template <typename N>
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constexpr auto operator()(N) const {
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return hana::bool_c<N::value == <%= input_size %>>;
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}
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};
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struct undefined {};
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int main() {
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constexpr auto map = hana::make_map(
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<%= (1..input_size).map { |n|
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"hana::make_pair(hana::int_c<#{n}>, undefined{})"
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}.join(', ') %>
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);
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constexpr auto result = hana::find_if(map, is_last{});
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(void)result;
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}
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