20 lines
483 B
C++
20 lines
483 B
C++
// Copyright Louis Dionne 2013-2017
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/core/when.hpp>
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#include <type_traits>
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namespace hana = boost::hana;
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template <typename T, typename = hana::when<true>>
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struct base_template;
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template <typename T>
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struct base_template<T, hana::when_valid<typename T::value_type>> {
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// something useful...
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};
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int main() { }
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