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// 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/detail/first_unsatisfied_index.hpp>
#include <boost/hana/not_equal.hpp>
#include <laws/base.hpp>
#include <type_traits>
namespace hana = boost::hana;
using hana::test::ct_eq;
struct poison {
poison() = default;
poison(poison const&) = delete;
};
int main() {
auto predicate = [](auto x) {
static_assert(!std::is_same<poison, decltype(x)>::value, "");
return hana::not_equal(x, ct_eq<9>{});
};
using Find = hana::detail::first_unsatisfied_index<decltype(predicate)>;
static_assert(decltype(Find{}())::value == 0, "");
static_assert(decltype(Find{}(ct_eq<9>{}))::value == 0, "");
static_assert(decltype(Find{}(ct_eq<0>{}))::value == 1, "");
static_assert(decltype(Find{}(ct_eq<9>{}, poison{}))::value == 0, "");
static_assert(decltype(Find{}(ct_eq<0>{}, ct_eq<9>{}))::value == 1, "");
static_assert(decltype(Find{}(ct_eq<0>{}, ct_eq<1>{}))::value == 2, "");
static_assert(decltype(Find{}(ct_eq<9>{}, poison{}, poison{}))::value == 0, "");
static_assert(decltype(Find{}(ct_eq<0>{}, ct_eq<9>{}, poison{}))::value == 1, "");
static_assert(decltype(Find{}(ct_eq<0>{}, ct_eq<1>{}, ct_eq<9>{}))::value == 2, "");
static_assert(decltype(Find{}(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}))::value == 3, "");
static_assert(decltype(Find{}(ct_eq<9>{}, poison{}, poison{}, poison{}))::value == 0, "");
static_assert(decltype(Find{}(ct_eq<0>{}, ct_eq<9>{}, poison{}, poison{}))::value == 1, "");
static_assert(decltype(Find{}(ct_eq<0>{}, ct_eq<1>{}, ct_eq<9>{}, poison{}))::value == 2, "");
static_assert(decltype(Find{}(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<9>{}))::value == 3, "");
static_assert(decltype(Find{}(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}))::value == 4, "");
}
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