From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:45:59 +0200 Subject: Adding upstream version 16.2.11+ds. Signed-off-by: Daniel Baumann --- src/boost/libs/hana/example/drop_front.cpp | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) create mode 100644 src/boost/libs/hana/example/drop_front.cpp (limited to 'src/boost/libs/hana/example/drop_front.cpp') diff --git a/src/boost/libs/hana/example/drop_front.cpp b/src/boost/libs/hana/example/drop_front.cpp new file mode 100644 index 000000000..c48388371 --- /dev/null +++ b/src/boost/libs/hana/example/drop_front.cpp @@ -0,0 +1,24 @@ +// 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 +#include +#include +#include +#include +namespace hana = boost::hana; + + +constexpr auto xs = hana::make_tuple(0, '1', 2.0); + +static_assert(hana::drop_front(xs, hana::size_c<0>) == xs, ""); +static_assert(hana::drop_front(xs, hana::size_c<1>) == hana::make_tuple('1', 2.0), ""); +static_assert(hana::drop_front(xs, hana::size_c<2>) == hana::make_tuple(2.0), ""); +BOOST_HANA_CONSTANT_CHECK(hana::drop_front(xs, hana::size_c<3>) == hana::make_tuple()); +BOOST_HANA_CONSTANT_CHECK(hana::drop_front(xs, hana::size_c<4>) == hana::make_tuple()); + +// drop_front(xs) is equivalent to drop_front(xs, size_t<1>) +static_assert(hana::drop_front(xs) == hana::make_tuple('1', 2.0), ""); + +int main() { } -- cgit v1.2.3