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/*=============================================================================
Copyright (c) 2017 Paul Fultz II
implicit.cpp
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#include <boost/hof/implicit.hpp>
#include "test.hpp"
template<class T>
struct auto_caster
{
template<class U>
T operator()(U x)
{
return T(x);
}
};
template<class T>
struct auto_caster_noexcept
{
template<class U>
T operator()(U x) noexcept
{
return T(x);
}
};
struct auto_caster_foo
{
int i;
explicit auto_caster_foo(int ip) : i(ip) {}
};
// TODO: Test template constraint on conversion operator
static constexpr boost::hof::implicit<auto_caster> auto_cast = {};
BOOST_HOF_TEST_CASE()
{
float f = 1.5;
int i = auto_cast(f);
// auto_caster_foo x = 1;
auto_caster_foo x = auto_cast(1);
BOOST_HOF_TEST_CHECK(1 == i);
BOOST_HOF_TEST_CHECK(1 == x.i);
}
#if BOOST_HOF_HAS_NOEXCEPT_DEDUCTION
BOOST_HOF_TEST_CASE()
{
boost::hof::implicit<auto_caster_noexcept> lauto_cast{};
float f = 1.5;
static_assert(noexcept(int(lauto_cast(f))), "noexcept implicit");
}
#endif
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