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1 | // Copyright Louis Dionne 2013-2016 |
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 | } |