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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/hana/example/drop_while.cpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/drop_while.cpp b/src/boost/libs/hana/example/drop_while.cpp new file mode 100644 index 000000000..0e3cf7e74 --- /dev/null +++ b/src/boost/libs/hana/example/drop_while.cpp @@ -0,0 +1,33 @@ +// 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/drop_while.hpp> +#include <boost/hana/equal.hpp> +#include <boost/hana/integral_constant.hpp> +#include <boost/hana/less.hpp> +#include <boost/hana/negate.hpp> +#include <boost/hana/range.hpp> +#include <boost/hana/tuple.hpp> +namespace hana = boost::hana; +using namespace hana::literals; + + +auto negative = [](auto x) { + return x < hana::int_c<0>; +}; + +BOOST_HANA_CONSTANT_CHECK( + hana::drop_while(hana::make_range(hana::int_c<-3>, hana::int_c<6>), negative) + == + hana::make_range(hana::int_c<0>, hana::int_c<6>) +); + +BOOST_HANA_CONSTANT_CHECK( + hana::drop_while(hana::make_tuple(1_c, -2_c, 4_c, 5_c), negative) + == + hana::make_tuple(1_c, -2_c, 4_c, 5_c) +); + +int main() { } |