| 1 | // Copyright Louis Dionne 2013-2022 |
|---|---|
| 2 | // Distributed under the Boost Software License, Version 1.0. |
| 3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) |
| 4 | |
| 5 | #include <boost/hana/assert.hpp> |
| 6 | #include <boost/hana/core/is_a.hpp> |
| 7 | #include <boost/hana/integral_constant.hpp> |
| 8 | #include <boost/hana/value.hpp> |
| 9 | namespace hana = boost::hana; |
| 10 | |
| 11 | |
| 12 | void function() { } |
| 13 | void function_index(...) { } |
| 14 | |
| 15 | int main() { |
| 16 | // times member function |
| 17 | { |
| 18 | int counter = 0; |
| 19 | hana::int_c<3>.times([&] { ++counter; }); |
| 20 | BOOST_HANA_RUNTIME_CHECK(counter == 3); |
| 21 | |
| 22 | // Call .times with a normal function used to fail. |
| 23 | hana::int_c<3>.times(function); |
| 24 | |
| 25 | // make sure times can be accessed as a static member function too |
| 26 | decltype(hana::int_c<5>)::times([]{ }); |
| 27 | |
| 28 | // make sure xxx.times can be used as a function object |
| 29 | auto z = hana::int_c<5>.times; |
| 30 | (void)z; |
| 31 | } |
| 32 | |
| 33 | // times.with_index |
| 34 | { |
| 35 | int index = 0; |
| 36 | hana::int_c<3>.times.with_index([&](auto i) { |
| 37 | static_assert(hana::is_an<hana::integral_constant_tag<int>>(i), ""); |
| 38 | BOOST_HANA_RUNTIME_CHECK(hana::value(i) == index); |
| 39 | ++index; |
| 40 | }); |
| 41 | |
| 42 | // Calling .times.with_index with a normal function used to fail. |
| 43 | hana::int_c<3>.times.with_index(function_index); |
| 44 | |
| 45 | // make sure times.with_index can be accessed as a static member |
| 46 | // function too |
| 47 | auto times = hana::int_c<5>.times; |
| 48 | decltype(times)::with_index([](auto) { }); |
| 49 | |
| 50 | // make sure xxx.times.with_index can be used as a function object |
| 51 | auto z = hana::int_c<5>.times.with_index; |
| 52 | (void)z; |
| 53 | |
| 54 | // make sure we're calling the function in the right order |
| 55 | int current = 0; |
| 56 | hana::int_c<5>.times.with_index([&](auto i) { |
| 57 | BOOST_HANA_RUNTIME_CHECK(hana::value(i) == current); |
| 58 | ++current; |
| 59 | }); |
| 60 | } |
| 61 | } |
| 62 |