60 lines
2.1 KiB
C++
60 lines
2.1 KiB
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/core/to.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/ext/std/integral_constant.hpp>
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#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/string.hpp>
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#include <type_traits>
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namespace hana = boost::hana;
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constexpr char const empty[] = "";
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constexpr char const a[] = "a";
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constexpr char const ab[] = "ab";
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constexpr char const abc[] = "abc";
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constexpr char const abcd[] = "abcd";
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int main() {
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{
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auto string = hana::to<hana::string_tag>(hana::integral_constant<char const*, empty>{});
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BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<>));
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}
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{
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auto string = hana::to<hana::string_tag>(hana::integral_constant<char const*, a>{});
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BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a'>));
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}
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{
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auto string = hana::to<hana::string_tag>(hana::integral_constant<char const*, ab>{});
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BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a', 'b'>));
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}
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{
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auto string = hana::to<hana::string_tag>(hana::integral_constant<char const*, abc>{});
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BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a', 'b', 'c'>));
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}
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{
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auto string = hana::to<hana::string_tag>(hana::integral_constant<char const*, abcd>{});
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BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a', 'b', 'c', 'd'>));
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}
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// Make sure it also works with std::integral_constant, for example
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{
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auto string = hana::to<hana::string_tag>(std::integral_constant<char const*, abcd>{});
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BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a', 'b', 'c', 'd'>));
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}
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// Make sure the `to_string` shortcut works
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{
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auto string = hana::to_string(hana::integral_constant<char const*, abcd>{});
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BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a', 'b', 'c', 'd'>));
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}
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}
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