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hana/example/functional/placeholder.cpp
2014-06-18 10:06:19 -04:00

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783 B
C++

/*
@copyright Louis Dionne 2014
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
*/
#include <boost/hana/detail/constexpr.hpp>
#include <boost/hana/detail/static_assert.hpp>
#include <boost/hana/functional.hpp>
using namespace boost::hana;
int main() {
//! [main]
BOOST_HANA_CONSTEXPR_LAMBDA auto plus = _ + _;
BOOST_HANA_STATIC_ASSERT(plus(1, 2) == 1 + 2);
BOOST_HANA_CONSTEXPR_LAMBDA auto increment = _ + 1;
BOOST_HANA_STATIC_ASSERT(increment(1) == 2);
BOOST_HANA_CONSTEXPR_LAMBDA auto double_ = 2 * _;
BOOST_HANA_STATIC_ASSERT(double_(1) == 2);
// Extra arguments are ignored.
BOOST_HANA_STATIC_ASSERT(double_(1, "ignored") == 2);
//! [main]
}