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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/hana/test/experimental/view/transformed/length.cpp | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/experimental/view/transformed/length.cpp b/src/boost/libs/hana/test/experimental/view/transformed/length.cpp new file mode 100644 index 000000000..516df7da8 --- /dev/null +++ b/src/boost/libs/hana/test/experimental/view/transformed/length.cpp @@ -0,0 +1,49 @@ +// 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/experimental/view.hpp> +#include <boost/hana/integral_constant.hpp> +#include <boost/hana/length.hpp> + +#include <support/seq.hpp> +namespace hana = boost::hana; + + +template <int> struct undefined { }; + +int main() { + auto container = ::seq; + + { + auto storage = container(); + auto transformed = hana::experimental::transformed(storage, undefined<99>{}); + BOOST_HANA_CONSTANT_CHECK(hana::equal( + hana::length(transformed), + hana::size_c<0> + )); + }{ + auto storage = container(undefined<0>{}); + auto transformed = hana::experimental::transformed(storage, undefined<99>{}); + BOOST_HANA_CONSTANT_CHECK(hana::equal( + hana::length(transformed), + hana::size_c<1> + )); + }{ + auto storage = container(undefined<0>{}, undefined<1>{}); + auto transformed = hana::experimental::transformed(storage, undefined<99>{}); + BOOST_HANA_CONSTANT_CHECK(hana::equal( + hana::length(transformed), + hana::size_c<2> + )); + }{ + auto storage = container(undefined<0>{}, undefined<1>{}, undefined<2>{}); + auto transformed = hana::experimental::transformed(storage, undefined<99>{}); + BOOST_HANA_CONSTANT_CHECK(hana::equal( + hana::length(transformed), + hana::size_c<3> + )); + } +} |