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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <iterator>
// struct bidirectional_iterator_tag : public forward_iterator_tag {};
#include <iterator>
#include <type_traits>
int main()
{
std::bidirectional_iterator_tag tag;
static_assert((std::is_base_of<std::forward_iterator_tag,
std::bidirectional_iterator_tag>::value), "");
static_assert((!std::is_base_of<std::output_iterator_tag,
std::bidirectional_iterator_tag>::value), "");
}