mirror of
https://github.com/boostorg/hana.git
synced 2026-02-21 03:02:11 +00:00
30 lines
899 B
C++
30 lines
899 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/integral.hpp>
|
|
#include <boost/hana/list/instance.hpp>
|
|
#include <boost/hana/map.hpp>
|
|
#include <boost/hana/maybe.hpp>
|
|
#include <boost/hana/pair.hpp>
|
|
#include <boost/hana/type.hpp>
|
|
using namespace boost::hana;
|
|
|
|
|
|
int main() {
|
|
//! [main]
|
|
BOOST_HANA_CONSTANT_ASSERT(lookup(list(int_<1>, type<int>, '3'), type<int>) == just(type<int>));
|
|
BOOST_HANA_CONSTANT_ASSERT(lookup(list(int_<1>, type<int>, '3'), type<void>) == nothing);
|
|
|
|
BOOST_HANA_CONSTEXPR_LAMBDA auto m = map(
|
|
pair(1, 'x'),
|
|
pair(type<float>, 3.3),
|
|
pair(type<char>, type<int>)
|
|
);
|
|
BOOST_HANA_CONSTEXPR_ASSERT(lookup(m, type<float>) == just(3.3));
|
|
//! [main]
|
|
}
|