You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// UNSUPPORTED: c++98, c++03, c++11, c++14
|
|
// <optional>
|
|
|
|
// template <class T, class U> constexpr bool operator< (const optional<T>& x, const optional<U>& y);
|
|
|
|
#include <optional>
|
|
|
|
#include "test_macros.h"
|
|
|
|
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(int, char**) {
|
|
{
|
|
typedef optional<X> O;
|
|
|
|
constexpr O o1; // disengaged
|
|
constexpr O o2; // disengaged
|
|
constexpr O o3{1}; // engaged
|
|
constexpr O o4{2}; // engaged
|
|
constexpr O o5{1}; // engaged
|
|
|
|
static_assert(!(o1 < o1), "");
|
|
static_assert(!(o1 < o2), "");
|
|
static_assert((o1 < o3), "");
|
|
static_assert((o1 < o4), "");
|
|
static_assert((o1 < o5), "");
|
|
|
|
static_assert(!(o2 < o1), "");
|
|
static_assert(!(o2 < o2), "");
|
|
static_assert((o2 < o3), "");
|
|
static_assert((o2 < o4), "");
|
|
static_assert((o2 < o5), "");
|
|
|
|
static_assert(!(o3 < o1), "");
|
|
static_assert(!(o3 < o2), "");
|
|
static_assert(!(o3 < o3), "");
|
|
static_assert((o3 < o4), "");
|
|
static_assert(!(o3 < o5), "");
|
|
|
|
static_assert(!(o4 < o1), "");
|
|
static_assert(!(o4 < o2), "");
|
|
static_assert(!(o4 < o3), "");
|
|
static_assert(!(o4 < o4), "");
|
|
static_assert(!(o4 < o5), "");
|
|
|
|
static_assert(!(o5 < o1), "");
|
|
static_assert(!(o5 < o2), "");
|
|
static_assert(!(o5 < o3), "");
|
|
static_assert((o5 < o4), "");
|
|
static_assert(!(o5 < o5), "");
|
|
}
|
|
{
|
|
using O1 = optional<int>;
|
|
using O2 = optional<long>;
|
|
constexpr O1 o1(42);
|
|
static_assert(o1 < O2(101), "");
|
|
static_assert(!(O2(101) < o1), "");
|
|
}
|
|
{
|
|
using O1 = optional<int>;
|
|
using O2 = optional<const int>;
|
|
constexpr O1 o1(42);
|
|
static_assert(o1 < O2(101), "");
|
|
static_assert(!(O2(101) < o1), "");
|
|
}
|
|
|
|
return 0;
|
|
}
|