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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
//
//===----------------------------------------------------------------------===//
// <tuple>
// template <class... Types> class tuple;
// UNSUPPORTED: c++03
// Test the following constructors:
// (1) tuple(Types const&...)
// (2) tuple(UTypes&&...)
// Test that (1) short circuits before evaluating the copy constructor of the
// second argument. Constructor (2) should be selected.
#include <tuple>
#include <utility>
#include <cassert>
#include "test_macros.h"
struct NonConstCopyable {
NonConstCopyable() = default;
explicit NonConstCopyable(int v) : value(v) {}
NonConstCopyable(NonConstCopyable&) = default;
NonConstCopyable(NonConstCopyable const&) = delete;
int value;
};
template <class T>
struct BlowsUpOnConstCopy {
BlowsUpOnConstCopy() = default;
constexpr BlowsUpOnConstCopy(BlowsUpOnConstCopy const&) {
static_assert(!std::is_same<T, T>::value, "");
}
BlowsUpOnConstCopy(BlowsUpOnConstCopy&) = default;
};
int main(int, char**) {
NonConstCopyable v(42);
BlowsUpOnConstCopy<int> b;
std::tuple<NonConstCopyable, BlowsUpOnConstCopy<int>> t(v, b);
assert(std::get<0>(t).value == 42);
return 0;
}
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