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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/is_a.hpp>
#include <boost/hana/integral_constant.hpp>
#include <boost/hana/value.hpp>
namespace hana = boost::hana;
void function() { }
void function_index(...) { }
int main() {
// times member function
{
int counter = 0;
hana::int_c<3>.times([&] { ++counter; });
BOOST_HANA_RUNTIME_CHECK(counter == 3);
// Call .times with a normal function used to fail.
hana::int_c<3>.times(function);
// make sure times can be accessed as a static member function too
decltype(hana::int_c<5>)::times([]{ });
// make sure xxx.times can be used as a function object
auto z = hana::int_c<5>.times;
(void)z;
}
// times.with_index
{
int index = 0;
hana::int_c<3>.times.with_index([&](auto i) {
static_assert(hana::is_an<hana::integral_constant_tag<int>>(i), "");
BOOST_HANA_RUNTIME_CHECK(hana::value(i) == index);
++index;
});
// Calling .times.with_index with a normal function used to fail.
hana::int_c<3>.times.with_index(function_index);
// make sure times.with_index can be accessed as a static member
// function too
auto times = hana::int_c<5>.times;
decltype(times)::with_index([](auto) { });
// make sure xxx.times.with_index can be used as a function object
auto z = hana::int_c<5>.times.with_index;
(void)z;
// make sure we're calling the function in the right order
int current = 0;
hana::int_c<5>.times.with_index([&](auto i) {
BOOST_HANA_RUNTIME_CHECK(hana::value(i) == current);
++current;
});
}
}
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