51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
// 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/tuple.hpp>
|
|
|
|
#include <string>
|
|
namespace hana = boost::hana;
|
|
|
|
|
|
struct Empty { };
|
|
|
|
int main() {
|
|
{
|
|
using T = hana::tuple<int>;
|
|
const T t(3);
|
|
BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 3);
|
|
}
|
|
{
|
|
using T = hana::tuple<std::string, int>;
|
|
const T t("high", 5);
|
|
BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == "high");
|
|
BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == 5);
|
|
}
|
|
{
|
|
using T = hana::tuple<double, int>;
|
|
constexpr T t(2.718, 5);
|
|
static_assert(hana::at_c<0>(t) == 2.718, "");
|
|
static_assert(hana::at_c<1>(t) == 5, "");
|
|
}
|
|
{
|
|
using T = hana::tuple<Empty>;
|
|
constexpr T t{Empty()};
|
|
constexpr Empty e = hana::at_c<0>(t); (void)e;
|
|
}
|
|
{
|
|
using T = hana::tuple<double&, std::string, int>;
|
|
double d = 1.5;
|
|
const T t(d, "high", 5);
|
|
BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 1.5);
|
|
BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == "high");
|
|
BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t) == 5);
|
|
hana::at_c<0>(t) = 2.5;
|
|
BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 2.5);
|
|
BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == "high");
|
|
BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t) == 5);
|
|
BOOST_HANA_RUNTIME_CHECK(d == 2.5);
|
|
}
|
|
}
|