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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <functional>
// template <class T>
// struct hash
// : public unary_function<T, size_t>
// {
// size_t operator()(T val) const;
// };
// Not very portable
#include <vector>
#include <cassert>
#include <type_traits>
int main()
{
typedef std::vector<bool> T;
typedef std::hash<T> H;
static_assert((std::is_base_of<std::unary_function<T, std::size_t>,
H>::value), "");
bool ba[] = {true, false, true, true, false};
T vb(std::begin(ba), std::end(ba));
H h;
assert(h(vb) != 0);
}
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