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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/hana/example/core/when_valid.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/core/when_valid.cpp b/src/boost/libs/hana/example/core/when_valid.cpp new file mode 100644 index 000000000..2ed680fab --- /dev/null +++ b/src/boost/libs/hana/example/core/when_valid.cpp @@ -0,0 +1,19 @@ +// 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/core/when.hpp> + +#include <type_traits> +namespace hana = boost::hana; + + +template <typename T, typename = hana::when<true>> +struct base_template; + +template <typename T> +struct base_template<T, hana::when_valid<typename T::value_type>> { + // something useful... +}; + +int main() { } |