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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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// <optional>
// template <class T> constexpr bool operator>=(const optional<T>& x, const T& v);
// template <class T> constexpr bool operator>=(const T& v, const optional<T>& x);
#include <optional>
using std::optional;
struct X {
int i_;
constexpr X(int i) : i_(i) {}
};
constexpr bool operator>=(const X& lhs, const X& rhs) {
return lhs.i_ >= rhs.i_;
}
int main() {
{
typedef X T;
typedef optional<T> O;
constexpr T val(2);
constexpr O o1; // disengaged
constexpr O o2{1}; // engaged
constexpr O o3{val}; // engaged
static_assert(!(o1 >= T(1)), "");
static_assert((o2 >= T(1)), ""); // equal
static_assert((o3 >= T(1)), "");
static_assert(!(o2 >= val), "");
static_assert((o3 >= val), ""); // equal
static_assert(!(o3 >= T(3)), "");
static_assert((T(1) >= o1), "");
static_assert((T(1) >= o2), ""); // equal
static_assert(!(T(1) >= o3), "");
static_assert((val >= o2), "");
static_assert((val >= o3), ""); // equal
static_assert((T(3) >= o3), "");
}
{
using O = optional<int>;
constexpr O o1(42);
static_assert(o1 >= 42l, "");
static_assert(!(11l >= o1), "");
}
{
using O = optional<const int>;
constexpr O o1(42);
static_assert(o1 >= 42, "");
static_assert(!(11 >= o1), "");
}
}
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