hana/test/assert/constexpr.cpp
2017-01-07 14:14:18 -08:00

31 lines
1.0 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>
namespace hana = boost::hana;
template <bool value>
bool runtime_bool() { return value; }
template <bool value>
constexpr bool constexpr_bool() { return value; }
int main() {
// Make sure it works at function scope
BOOST_HANA_CONSTEXPR_ASSERT(runtime_bool<true>());
BOOST_HANA_CONSTEXPR_ASSERT(constexpr_bool<true>());
BOOST_HANA_CONSTEXPR_ASSERT_MSG(runtime_bool<true>(), "message");
BOOST_HANA_CONSTEXPR_ASSERT_MSG(constexpr_bool<true>(), "message");
// Make sure we can reference a local variable
auto rt_yes = runtime_bool<true>();
constexpr auto cx_yes = constexpr_bool<true>();
BOOST_HANA_CONSTEXPR_ASSERT(rt_yes);
BOOST_HANA_CONSTEXPR_ASSERT(cx_yes);
BOOST_HANA_CONSTEXPR_ASSERT_MSG(rt_yes, "message");
BOOST_HANA_CONSTEXPR_ASSERT_MSG(cx_yes, "message");
}