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307d3d0ec8
- Split type class instances into separate files - Instances provided automatically by a type class are actually MCDs - Test each instance in a single file, not one file per method - Refactor the operator system to fix the ADL-related bug.
31 lines
752 B
C++
31 lines
752 B
C++
/*
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@copyright Louis Dionne 2014
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/hana/functional.hpp>
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#include <boost/hana/tuple.hpp>
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#include <cassert>
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using namespace boost::hana;
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int main() {
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//! [main]
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auto cheap_tie = [](auto& ...vars) {
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return partial(flip(unpack), [&vars...](auto ...values) {
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// Using an initializer list sequences the assignments.
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int dummy[] = {((vars = values), 0)...};
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(void)dummy;
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});
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};
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int a = 0;
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char b = '\0';
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double c = 0;
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cheap_tie(a, b, c)(list(1, '2', 3.3));
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assert(a == 1 && b == '2' && c == 3.3);
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//! [main]
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}
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