blob: c8fead5e05f2d8a919228304f110c62300dc4b65 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
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/core/when.hpp>
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::first_type>> { };
template <typename T>
struct base_template<T, hana::when_valid<typename T::second_type>> { };
struct First { struct first_type; };
struct Second { struct second_type; };
template struct base_template<First>;
template struct base_template<Second>;
int main() { }
|
