diff options
Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/hana/example/detail/wrong.cpp | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/detail/wrong.cpp b/src/boost/libs/hana/example/detail/wrong.cpp new file mode 100644 index 000000000..2b603c623 --- /dev/null +++ b/src/boost/libs/hana/example/detail/wrong.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 <boost/hana/detail/wrong.hpp> +namespace hana = boost::hana; + + +template <typename T, typename U> +struct base_template { + // Can't write this because the assertion would always fire up: + // static_assert(false, "..."); + + // So instead we write this: + static_assert(hana::detail::wrong<base_template<T, U>>::value, + "base_template does not have a valid default definition"); +}; + +template <> +struct base_template<int, int> { + // something useful +}; + +int main() { } |