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- /*=============================================================================
- Copyright (c) 2017 Paul Fultz II
- unpack_uncallable.cpp
- Distributed under the Boost Software License, Version 1.0. (See accompanying
- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- ==============================================================================*/
- #include <boost/hof/unpack.hpp>
- struct foo
- {};
- namespace boost { namespace hof {
- template<>
- struct unpack_sequence<foo>
- {
- template<class F, class S>
- constexpr static auto apply(F&&, S&& s) BOOST_HOF_RETURNS(s.bar);
- };
- }
- int main() {
- boost::hof::unpack(boost::hof::always(1))(foo{});
- }
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