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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
// <propagate_const>
// template <class T> constexpr bool operator==(const propagate_const<T>& x, const propagate_const<T>& y);
// template <class T> constexpr bool operator==(const T& x, const propagate_const<T>& y);
// template <class T> constexpr bool operator==(const propagate_const<T>& x, const T& y);
#include <experimental/propagate_const>
#include "propagate_const_helpers.h"
#include <cassert>
using std::experimental::propagate_const;
using std::nullptr_t;
constexpr bool operator==(const X &lhs, const X &rhs) {
return lhs.i_ == rhs.i_;
}
constexpr bool operator==(const X &, const nullptr_t &) {
return false;
}
constexpr bool operator==(const nullptr_t &, const X &) {
return false;
}
int main() {
constexpr X x1_1(1);
constexpr X x2_1(1);
constexpr X x3_2(2);
static_assert(x1_1 == x1_1, "");
static_assert(x1_1 == x2_1, "");
static_assert(!(x1_1 == x3_2), "");
typedef propagate_const<X> P;
constexpr P p1_1(1);
constexpr P p2_1(1);
constexpr P p3_2(2);
static_assert(p1_1 == p1_1, "");
static_assert(p1_1 == p2_1, "");
static_assert(!(p1_1 == p3_2), "");
static_assert(x1_1 == p1_1, "");
static_assert(!(x1_1 == p3_2), "");
static_assert(p1_1 == x1_1, "");
static_assert(!(p1_1 == x3_2), "");
static_assert(!(p1_1==nullptr),"");
static_assert(!(nullptr==p1_1),"");
}
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