1 // Copyright 2019 Dmitry Arkhipov 2 // Distributed under the Boost Software License, Version 1.0. (See 3 // accompanying file LICENSE_1_0.txt or copy at 4 // http://www.boost.org/LICENSE_1_0.txt) 5 6 7 #if VERSIONED_API < 2 8 # error "API is too old" 9 #endif 10 main()11 int main() {} 12