blob: c782d10a9b4dcbca39ac66682ee979745c623696 [file] [log] [blame]
//===----------------------------------------------------------------------===//
//
// 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, c++11
// <optional>
// constexpr optional(const T& v);
#include <experimental/optional>
#include <type_traits>
#include <cassert>
using std::experimental::optional;
class X
{
int i_;
public:
X(int i) : i_(i) {}
friend bool operator==(const X& x, const X& y) {return x.i_ == y.i_;}
};
class Y
{
int i_;
public:
constexpr Y(int i) : i_(i) {}
friend constexpr bool operator==(const Y& x, const Y& y) {return x.i_ == y.i_;}
};
class Z
{
public:
Z(int) {}
Z(const Z&) {throw 6;}
};
int main()
{
{
typedef int T;
constexpr T t(5);
constexpr optional<T> opt(t);
static_assert(static_cast<bool>(opt) == true, "");
static_assert(*opt == 5, "");
struct test_constexpr_ctor
: public optional<T>
{
constexpr test_constexpr_ctor(const T&) {}
};
}
{
typedef double T;
constexpr T t(3);
constexpr optional<T> opt(t);
static_assert(static_cast<bool>(opt) == true, "");
static_assert(*opt == 3, "");
struct test_constexpr_ctor
: public optional<T>
{
constexpr test_constexpr_ctor(const T&) {}
};
}
{
typedef X T;
const T t(3);
optional<T> opt(t);
assert(static_cast<bool>(opt) == true);
assert(*opt == 3);
}
{
typedef Y T;
constexpr T t(3);
constexpr optional<T> opt(t);
static_assert(static_cast<bool>(opt) == true, "");
static_assert(*opt == 3, "");
struct test_constexpr_ctor
: public optional<T>
{
constexpr test_constexpr_ctor(const T&) {}
};
}
{
typedef Z T;
try
{
const T t(3);
optional<T> opt(t);
assert(false);
}
catch (int i)
{
assert(i == 6);
}
}
}