1234567891011121314151617181920212223242526272829303132333435363738 |
- // Copyright Louis Dionne 2013-2017
- // 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/assert.hpp>
- #include <boost/hana/comparing.hpp>
- #include <boost/hana/equal.hpp>
- #include <boost/hana/tuple.hpp>
- #include <boost/hana/type.hpp>
- #include <boost/hana/unique.hpp>
- #include <string>
- namespace hana = boost::hana;
- using namespace std::literals;
- // unique without a predicate
- constexpr auto types = hana::tuple_t<int, float, float, char, int, int, int, double>;
- BOOST_HANA_CONSTANT_CHECK(
- hana::unique(types) == hana::tuple_t<int, float, char, int, double>
- );
- int main() {
- // unique with a predicate
- auto objects = hana::make_tuple(1, 2, "abc"s, 'd', "efg"s, "hij"s, 3.4f);
- BOOST_HANA_RUNTIME_CHECK(
- hana::unique(objects, [](auto const& t, auto const& u) {
- return hana::typeid_(t) == hana::typeid_(u);
- })
- == hana::make_tuple(1, "abc"s, 'd', "efg"s, 3.4f)
- );
- // unique.by is syntactic sugar
- BOOST_HANA_RUNTIME_CHECK(
- hana::unique.by(hana::comparing(hana::typeid_), objects) ==
- hana::make_tuple(1, "abc"s, 'd', "efg"s, 3.4f)
- );
- }
|