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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// template<class... TArgs, class... BoundArgs>
// requires constructible_from<T, TArgs...> &&
// constructible_from<Bound, BoundArgs...>
// constexpr explicit repeat_view(piecewise_construct_t,
// tuple<TArgs...> value_args, tuple<BoundArgs...> bound_args = tuple<>{});
#include <ranges>
#include <cassert>
#include <concepts>
#include <tuple>
#include <utility>
struct C {};
struct B {
int v;
};
struct A {
int x = 111;
int y = 222;
constexpr A() = default;
constexpr A(B b) : x(b.v), y(b.v + 1) {}
constexpr A(int _x, int _y) : x(_x), y(_y) {}
};
static_assert(std::constructible_from<std::ranges::repeat_view<A, int>,
std::piecewise_construct_t,
std::tuple<int, int>,
std::tuple<int>>);
static_assert(std::constructible_from<std::ranges::repeat_view<A, int>,
std::piecewise_construct_t,
std::tuple<B>,
std::tuple<int>>);
static_assert(std::constructible_from<std::ranges::repeat_view<A, int>,
std::piecewise_construct_t,
std::tuple<>,
std::tuple<int>>);
static_assert(std::constructible_from<std::ranges::repeat_view<A>,
std::piecewise_construct_t,
std::tuple<int, int>,
std::tuple<std::unreachable_sentinel_t>>);
static_assert(std::constructible_from<std::ranges::repeat_view<A>,
std::piecewise_construct_t,
std::tuple<B>,
std::tuple<std::unreachable_sentinel_t>>);
static_assert(std::constructible_from<std::ranges::repeat_view<A>,
std::piecewise_construct_t,
std::tuple<>,
std::tuple<std::unreachable_sentinel_t>>);
static_assert(!std::constructible_from<std::ranges::repeat_view<A, int>,
std::piecewise_construct_t,
std::tuple<C>,
std::tuple<int>>);
static_assert(!std::constructible_from<std::ranges::repeat_view<A>,
std::piecewise_construct_t,
std::tuple<C>,
std::tuple<std::unreachable_sentinel_t>>);
static_assert(!std::constructible_from<std::ranges::repeat_view<A, int>,
std::piecewise_construct_t,
std::tuple<int, int, int>,
std::tuple<int>>);
static_assert(!std::constructible_from<std::ranges::repeat_view<A>,
std::piecewise_construct_t,
std::tuple<int, int, int>,
std::tuple<std::unreachable_sentinel_t>>);
static_assert(
!std::constructible_from<std::ranges::repeat_view<A>, std::piecewise_construct_t, std::tuple<B>, std::tuple<int>>);
constexpr bool test() {
{
std::ranges::repeat_view<A, int> rv(std::piecewise_construct, std::tuple{}, std::tuple{3});
assert(rv.size() == 3);
assert(rv[0].x == 111);
assert(rv[0].y == 222);
assert(rv.begin() + 3 == rv.end());
}
{
std::ranges::repeat_view<A> rv(std::piecewise_construct, std::tuple{}, std::tuple{std::unreachable_sentinel});
assert(rv[0].x == 111);
assert(rv[0].y == 222);
assert(rv.begin() + 300 != rv.end());
}
{
std::ranges::repeat_view<A, int> rv(std::piecewise_construct, std::tuple{1, 2}, std::tuple{3});
assert(rv.size() == 3);
assert(rv[0].x == 1);
assert(rv[0].y == 2);
assert(rv.begin() + 3 == rv.end());
}
{
std::ranges::repeat_view<A> rv(std::piecewise_construct, std::tuple{1, 2}, std::tuple{std::unreachable_sentinel});
assert(rv[0].x == 1);
assert(rv[0].y == 2);
assert(rv.begin() + 300 != rv.end());
}
{
std::ranges::repeat_view<A, int> rv(std::piecewise_construct, std::tuple{B{11}}, std::tuple{3});
assert(rv.size() == 3);
assert(rv[0].x == 11);
assert(rv[0].y == 12);
assert(rv.begin() + 3 == rv.end());
}
{
std::ranges::repeat_view<A> rv(std::piecewise_construct, std::tuple{B{10}}, std::tuple{std::unreachable_sentinel});
assert(rv[0].x == 10);
assert(rv[0].y == 11);
assert(rv.begin() + 300 != rv.end());
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
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