mirror of
https://github.com/boostorg/hana.git
synced 2026-02-20 14:52:11 +00:00
25 lines
689 B
C++
25 lines
689 B
C++
/*
|
|
* Copyright Louis Dionne 2014
|
|
* Distributed under the Boost Software License, Version 1.0.
|
|
* (See accompanying file LICENSE.md or copy at
|
|
* http://www.boost.org/LICENSE_1_0.txt)
|
|
*/
|
|
|
|
#include <boost/hana/maybe.hpp>
|
|
|
|
#include <boost/hana/detail/constexpr.hpp>
|
|
#include <boost/hana/detail/static_assert.hpp>
|
|
#include <boost/hana/integral.hpp>
|
|
using namespace boost::hana;
|
|
|
|
|
|
BOOST_HANA_CONSTEXPR_LAMBDA auto inc = [](auto x) {
|
|
return x + int_<1>;
|
|
};
|
|
|
|
int main() {
|
|
BOOST_HANA_STATIC_ASSERT(fmap(inc, nothing) == nothing);
|
|
BOOST_HANA_STATIC_ASSERT(fmap(inc, just(1)) == just(2));
|
|
BOOST_HANA_STATIC_ASSERT(fmap(inc, just(int_<1>)) == just(int_<2>));
|
|
}
|