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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03
// <tuple>
// See llvm.org/PR20855
#include <functional>
#include <tuple>
#include <string>
#include <cassert>
#include "test_macros.h"
#if TEST_HAS_BUILTIN_IDENTIFIER(__reference_binds_to_temporary)
# define ASSERT_REFERENCE_BINDS_TEMPORARY(...) static_assert(__reference_binds_to_temporary(__VA_ARGS__), "")
# define ASSERT_NOT_REFERENCE_BINDS_TEMPORARY(...) static_assert(!__reference_binds_to_temporary(__VA_ARGS__), "")
#else
# define ASSERT_REFERENCE_BINDS_TEMPORARY(...) static_assert(true, "")
# define ASSERT_NOT_REFERENCE_BINDS_TEMPORARY(...) static_assert(true, "")
#endif
template <class Tp>
struct ConvertsTo {
using RawTp = typename std::remove_cv< typename std::remove_reference<Tp>::type>::type;
operator Tp() const {
return static_cast<Tp>(value);
}
mutable RawTp value;
};
struct Base {};
struct Derived : Base {};
static_assert(std::is_same<decltype("abc"), decltype(("abc"))>::value, "");
ASSERT_REFERENCE_BINDS_TEMPORARY(std::string const&, decltype("abc"));
ASSERT_REFERENCE_BINDS_TEMPORARY(std::string const&, decltype(("abc")));
ASSERT_REFERENCE_BINDS_TEMPORARY(std::string const&, const char*&&);
ASSERT_NOT_REFERENCE_BINDS_TEMPORARY(int&, const ConvertsTo<int&>&);
ASSERT_NOT_REFERENCE_BINDS_TEMPORARY(const int&, ConvertsTo<int&>&);
ASSERT_NOT_REFERENCE_BINDS_TEMPORARY(Base&, Derived&);
static_assert(std::is_constructible<int&, std::reference_wrapper<int>>::value, "");
static_assert(std::is_constructible<int const&, std::reference_wrapper<int>>::value, "");
template <class T> struct CannotDeduce {
using type = T;
};
template <class ...Args>
void F(typename CannotDeduce<std::tuple<Args...>>::type const&) {}
void compile_tests() {
{
F<int, int const&>(std::make_tuple(42, 42));
}
{
F<int, int const&>(std::make_tuple<const int&, const int&>(42, 42));
std::tuple<int, int const&> t(std::make_tuple<const int&, const int&>(42, 42));
}
{
auto fn = &F<int, std::string const&>;
fn(std::tuple<int, std::string const&>(42, std::string("a")));
fn(std::make_tuple(42, std::string("a")));
}
{
Derived d;
std::tuple<Base&, Base const&> t(d, d);
}
{
ConvertsTo<int&> ct;
std::tuple<int, int&> t(42, ct);
}
}
void allocator_tests() {
std::allocator<void> alloc;
int x = 42;
{
std::tuple<int&> t(std::ref(x));
assert(&std::get<0>(t) == &x);
std::tuple<int&> t1(std::allocator_arg, alloc, std::ref(x));
assert(&std::get<0>(t1) == &x);
}
{
auto r = std::ref(x);
auto const& cr = r;
std::tuple<int&> t(r);
assert(&std::get<0>(t) == &x);
std::tuple<int&> t1(cr);
assert(&std::get<0>(t1) == &x);
std::tuple<int&> t2(std::allocator_arg, alloc, r);
assert(&std::get<0>(t2) == &x);
std::tuple<int&> t3(std::allocator_arg, alloc, cr);
assert(&std::get<0>(t3) == &x);
}
{
std::tuple<int const&> t(std::ref(x));
assert(&std::get<0>(t) == &x);
std::tuple<int const&> t2(std::cref(x));
assert(&std::get<0>(t2) == &x);
std::tuple<int const&> t3(std::allocator_arg, alloc, std::ref(x));
assert(&std::get<0>(t3) == &x);
std::tuple<int const&> t4(std::allocator_arg, alloc, std::cref(x));
assert(&std::get<0>(t4) == &x);
}
{
auto r = std::ref(x);
auto cr = std::cref(x);
std::tuple<int const&> t(r);
assert(&std::get<0>(t) == &x);
std::tuple<int const&> t2(cr);
assert(&std::get<0>(t2) == &x);
std::tuple<int const&> t3(std::allocator_arg, alloc, r);
assert(&std::get<0>(t3) == &x);
std::tuple<int const&> t4(std::allocator_arg, alloc, cr);
assert(&std::get<0>(t4) == &x);
}
}
int main() {
compile_tests();
allocator_tests();
}
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