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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/hana/example/map/searchable.cpp | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/map/searchable.cpp b/src/boost/libs/hana/example/map/searchable.cpp new file mode 100644 index 000000000..4f51e704e --- /dev/null +++ b/src/boost/libs/hana/example/map/searchable.cpp @@ -0,0 +1,30 @@ +// 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/at_key.hpp> +#include <boost/hana/equal.hpp> +#include <boost/hana/find.hpp> +#include <boost/hana/integral_constant.hpp> +#include <boost/hana/map.hpp> +#include <boost/hana/optional.hpp> +#include <boost/hana/pair.hpp> +#include <boost/hana/type.hpp> +namespace hana = boost::hana; + + +constexpr auto m = hana::make_map( + hana::make_pair(hana::type_c<int>, 'i'), + hana::make_pair(hana::type_c<float>, 'f') +); +static_assert(hana::find(m, hana::type_c<int>) == hana::just('i'), ""); +static_assert(hana::find(m, hana::type_c<float>) == hana::just('f'), ""); +BOOST_HANA_CONSTANT_CHECK(hana::find(m, hana::type_c<void>) == hana::nothing); +BOOST_HANA_CONSTANT_CHECK(hana::find(m, hana::int_c<3>) == hana::nothing); + +// operator[] is equivalent to at_key +static_assert(m[hana::type_c<int>] == 'i', ""); +static_assert(m[hana::type_c<float>] == 'f', ""); + +int main() { } |