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// { dg-do compile { target c++20 } }
#include <tuple>
// PR libstdc++/102270 - std::tuple<>::swap missing constexpr specifier
constexpr bool swap_empty_tuple()
{
std::tuple<> t, u;
t.swap(u);
return true;
}
static_assert( swap_empty_tuple() );
#include <testsuite_allocator.h>
constexpr bool construct_using_allocator()
{
using Alloc = __gnu_test::SimpleAllocator<int>;
Alloc a;
const int i = 0;
struct X0a {
using allocator_type = Alloc;
/* not constexpr */ X0a() { }
constexpr X0a(allocator_type) { }
};
std::tuple<X0a> t0a(std::allocator_arg, a);
std::tuple<X0a, X0a> t00a(std::allocator_arg, a);
struct X0b {
using allocator_type = Alloc;
/* not constexpr */ X0b() { }
constexpr X0b(std::allocator_arg_t, allocator_type) { }
};
std::tuple<X0b> t0b(std::allocator_arg, a);
std::tuple<X0b, X0b> t00b(std::allocator_arg, a);
struct X1a {
using allocator_type = Alloc;
/* not constexpr */ X1a(int) { }
constexpr X1a(int, allocator_type) { }
};
std::tuple<X1a> t1a(std::allocator_arg, a, 1);
std::tuple<X1a, X1a> t11a(std::allocator_arg, a, 1, i);
struct X1b {
using allocator_type = Alloc;
/* not constexpr */ X1b(int) { }
constexpr X1b(std::allocator_arg_t, allocator_type, int) { }
};
std::tuple<X1b> t1b(std::allocator_arg, a, 1);
std::tuple<X1b, X1b> t11b(std::allocator_arg, a, 1, i);
std::tuple<X1a, X1a, X1b, X1b> t1a1b(std::allocator_arg, a, 1, i, 1, i);
const int c = 0;
std::tuple<int, int> tii(std::allocator_arg, a, c, c);
return true;
}
static_assert( construct_using_allocator() );
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