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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.
//
//===----------------------------------------------------------------------===//
// <tuple>
// template <class... Types> class tuple;
// template <class Alloc, class... UTypes>
// tuple(allocator_arg_t, const Alloc& a, UTypes&&...);
// UNSUPPORTED: c++98, c++03
#include <tuple>
#include <cassert>
#include "MoveOnly.h"
#include "allocators.h"
#include "../alloc_first.h"
#include "../alloc_last.h"
struct NoDefault { NoDefault() = delete; };
// Make sure the _Up... constructor SFINAEs out when the types that
// are not explicitly initialized are not all default constructible.
// Otherwise, std::is_constructible would return true but instantiating
// the constructor would fail.
void test_default_constructible_extension_sfinae()
{
{
typedef std::tuple<MoveOnly, NoDefault> Tuple;
static_assert(!std::is_constructible<
Tuple,
std::allocator_arg_t, A1<int>, MoveOnly
>::value, "");
static_assert(std::is_constructible<
Tuple,
std::allocator_arg_t, A1<int>, MoveOnly, NoDefault
>::value, "");
}
{
typedef std::tuple<MoveOnly, MoveOnly, NoDefault> Tuple;
static_assert(!std::is_constructible<
Tuple,
std::allocator_arg_t, A1<int>, MoveOnly, MoveOnly
>::value, "");
static_assert(std::is_constructible<
Tuple,
std::allocator_arg_t, A1<int>, MoveOnly, MoveOnly, NoDefault
>::value, "");
}
{
// Same idea as above but with a nested tuple
typedef std::tuple<MoveOnly, NoDefault> Tuple;
typedef std::tuple<MoveOnly, Tuple, MoveOnly, MoveOnly> NestedTuple;
static_assert(!std::is_constructible<
NestedTuple,
std::allocator_arg_t, A1<int>, MoveOnly, MoveOnly, MoveOnly, MoveOnly
>::value, "");
static_assert(std::is_constructible<
NestedTuple,
std::allocator_arg_t, A1<int>, MoveOnly, Tuple, MoveOnly, MoveOnly
>::value, "");
}
{
typedef std::tuple<MoveOnly, int> Tuple;
typedef std::tuple<MoveOnly, Tuple, MoveOnly, MoveOnly> NestedTuple;
static_assert(std::is_constructible<
NestedTuple,
std::allocator_arg_t, A1<int>, MoveOnly, MoveOnly, MoveOnly, MoveOnly
>::value, "");
static_assert(std::is_constructible<
NestedTuple,
std::allocator_arg_t, A1<int>, MoveOnly, Tuple, MoveOnly, MoveOnly
>::value, "");
}
}
int main()
{
{
std::tuple<MoveOnly> t(std::allocator_arg, A1<int>(), MoveOnly(0));
assert(std::get<0>(t) == 0);
}
{
std::tuple<MoveOnly, MoveOnly> t(std::allocator_arg, A1<int>(),
MoveOnly(0), MoveOnly(1));
assert(std::get<0>(t) == 0);
assert(std::get<1>(t) == 1);
}
{
std::tuple<MoveOnly, MoveOnly, MoveOnly> t(std::allocator_arg, A1<int>(),
MoveOnly(0),
1, 2);
assert(std::get<0>(t) == 0);
assert(std::get<1>(t) == 1);
assert(std::get<2>(t) == 2);
}
{
alloc_first::allocator_constructed = false;
alloc_last::allocator_constructed = false;
std::tuple<int, alloc_first, alloc_last> t(std::allocator_arg,
A1<int>(5), 1, 2, 3);
assert(std::get<0>(t) == 1);
assert(alloc_first::allocator_constructed);
assert(std::get<1>(t) == alloc_first(2));
assert(alloc_last::allocator_constructed);
assert(std::get<2>(t) == alloc_last(3));
}
// extensions
{
std::tuple<MoveOnly, MoveOnly, MoveOnly> t(std::allocator_arg, A1<int>(),
0, 1);
assert(std::get<0>(t) == 0);
assert(std::get<1>(t) == 1);
assert(std::get<2>(t) == MoveOnly());
}
{
std::tuple<MoveOnly, MoveOnly, MoveOnly> t(std::allocator_arg, A1<int>(),
0);
assert(std::get<0>(t) == 0);
assert(std::get<1>(t) == MoveOnly());
assert(std::get<2>(t) == MoveOnly());
}
// Check that SFINAE is properly applied with the default reduced arity
// constructor extensions.
test_default_constructible_extension_sfinae();
}
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