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Files
hana/example/maybe/traversable.cpp
Louis Dionne 26af39f3d9 Flip the arguments of several methods.
Flipped:
- traverse
- fmap, adjust, fill, replace
- drop_while, drop_until
- take_while, take_until
2014-08-29 10:24:19 -04:00

34 lines
790 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/assert.hpp>
#include <boost/hana/detail/constexpr.hpp>
#include <boost/hana/foreign.hpp>
#include <boost/hana/maybe.hpp>
#include <boost/hana/tuple.hpp>
using namespace boost::hana;
int main() {
//! [main]
BOOST_HANA_CONSTEXPR_LAMBDA auto replicate3 = [](auto x) {
return tuple(x, x, x);
};
BOOST_HANA_CONSTEXPR_ASSERT(
traverse<Tuple>(just(1), replicate3)
==
tuple(just(1), just(1), just(1))
);
BOOST_HANA_CONSTANT_ASSERT(
traverse<Tuple>(nothing, replicate3)
==
tuple(nothing)
);
//! [main]
}