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Diffstat (limited to 'src/boost/libs/hana/example/maximum.cpp')
-rw-r--r-- | src/boost/libs/hana/example/maximum.cpp | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/maximum.cpp b/src/boost/libs/hana/example/maximum.cpp new file mode 100644 index 000000000..b6d377d55 --- /dev/null +++ b/src/boost/libs/hana/example/maximum.cpp @@ -0,0 +1,25 @@ +// 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/equal.hpp> +#include <boost/hana/greater.hpp> +#include <boost/hana/integral_constant.hpp> +#include <boost/hana/maximum.hpp> +#include <boost/hana/tuple.hpp> +namespace hana = boost::hana; + + +int main() { + // without a predicate + BOOST_HANA_CONSTANT_CHECK( + hana::maximum(hana::tuple_c<int, -1, 0, 2, -4, 6, 9>) == hana::int_c<9> + ); + + // with a predicate + auto smallest = hana::maximum(hana::tuple_c<int, -1, 0, 2, -4, 6, 9>, [](auto x, auto y) { + return x > y; // order is reversed! + }); + BOOST_HANA_CONSTANT_CHECK(smallest == hana::int_c<-4>); +} |