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// Copyright Louis Dionne 2013-2017
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#include <boost/hana/assert.hpp>
#include <boost/hana/core/to.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/ext/std/integral_constant.hpp>
#include <boost/hana/integral_constant.hpp>
#include <boost/hana/string.hpp>
#include <type_traits>
namespace hana = boost::hana;
constexpr char const empty[] = "";
constexpr char const a[] = "a";
constexpr char const ab[] = "ab";
constexpr char const abc[] = "abc";
constexpr char const abcd[] = "abcd";
int main() {
{
auto string = hana::to<hana::string_tag>(hana::integral_constant<char const*, empty>{});
BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<>));
}
{
auto string = hana::to<hana::string_tag>(hana::integral_constant<char const*, a>{});
BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a'>));
}
{
auto string = hana::to<hana::string_tag>(hana::integral_constant<char const*, ab>{});
BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a', 'b'>));
}
{
auto string = hana::to<hana::string_tag>(hana::integral_constant<char const*, abc>{});
BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a', 'b', 'c'>));
}
{
auto string = hana::to<hana::string_tag>(hana::integral_constant<char const*, abcd>{});
BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a', 'b', 'c', 'd'>));
}
// Make sure it also works with std::integral_constant, for example
{
auto string = hana::to<hana::string_tag>(std::integral_constant<char const*, abcd>{});
BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a', 'b', 'c', 'd'>));
}
// Make sure the `to_string` shortcut works
{
auto string = hana::to_string(hana::integral_constant<char const*, abcd>{});
BOOST_HANA_CONSTANT_CHECK(hana::equal(string, hana::string_c<'a', 'b', 'c', 'd'>));
}
}
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