| 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/fuse.hpp> |
| 7 | #include <boost/hana/tuple.hpp> |
| 8 | namespace hana = boost::hana; |
| 9 | |
| 10 | |
| 11 | auto tie = [](auto& ...vars) { |
| 12 | return hana::fuse([&vars...](auto ...values) { |
| 13 | // Using an initializer list to sequence the assignments. |
| 14 | int dummy[] = {0, ((void)(vars = values), 0)...}; |
| 15 | (void)dummy; |
| 16 | }); |
| 17 | }; |
| 18 | |
| 19 | int main() { |
| 20 | int a = 0; |
| 21 | char b = '\0'; |
| 22 | double c = 0; |
| 23 | |
| 24 | tie(a, b, c)(hana::make_tuple(1, '2', 3.3)); |
| 25 | BOOST_HANA_RUNTIME_CHECK(a == 1 && b == '2' && c == 3.3); |
| 26 | } |
| 27 |