30 lines
903 B
C++
30 lines
903 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/equal.hpp>
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#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/transform.hpp>
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#include <boost/hana/tuple.hpp>
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#include <string>
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namespace hana = boost::hana;
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using namespace hana::literals;
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struct Fish { std::string name; };
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struct Cat { std::string name; };
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struct Dog { std::string name; };
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int main() {
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hana::tuple<Fish, Cat, Dog> animals{{"Nemo"}, {"Garfield"}, {"Snoopy"}};
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animals[0_c].name = "Moby Dick"; // can modify elements in place, like std::tuple
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auto names = hana::transform(animals, [](auto a) {
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return a.name;
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});
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BOOST_HANA_RUNTIME_CHECK(names == hana::make_tuple("Moby Dick", "Garfield", "Snoopy"));
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}
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