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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/hana/example/lazy/functor.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/lazy/functor.cpp b/src/boost/libs/hana/example/lazy/functor.cpp new file mode 100644 index 000000000..5fa20ab3b --- /dev/null +++ b/src/boost/libs/hana/example/lazy/functor.cpp @@ -0,0 +1,17 @@ +// 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/eval.hpp> +#include <boost/hana/functional/placeholder.hpp> +#include <boost/hana/lazy.hpp> +#include <boost/hana/transform.hpp> +namespace hana = boost::hana; +using hana::_; + + +int main() { + static_assert(hana::eval(hana::transform(hana::make_lazy(4 / _)(1), _ * 3)) == (4 / 1) * 3, ""); + + hana::transform(hana::make_lazy(4 / _)(0), _ * 3); // never evaluated +} |