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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// REQUIRES: c++11
// <utility>
// Test that only the default constructor is constexpr in C++11
#include <utility>
#include <cassert>
struct ExplicitT {
constexpr explicit ExplicitT(int x) : value(x) {}
constexpr explicit ExplicitT(ExplicitT const& o) : value(o.value) {}
int value;
};
struct ImplicitT {
constexpr ImplicitT(int x) : value(x) {}
constexpr ImplicitT(ImplicitT const& o) : value(o.value) {}
int value;
};
int main(int, char**)
{
{
using P = std::pair<int, int>;
constexpr int x = 42;
constexpr P default_p{};
constexpr P copy_p(default_p);
constexpr P const_U_V(x, x); // expected-error {{must be initialized by a constant expression}}
constexpr P U_V(42, 101); // expected-error {{must be initialized by a constant expression}}
}
{
using P = std::pair<ExplicitT, ExplicitT>;
constexpr std::pair<int, int> other;
constexpr ExplicitT e(99);
constexpr P const_U_V(e, e); // expected-error {{must be initialized by a constant expression}}
constexpr P U_V(42, 101); // expected-error {{must be initialized by a constant expression}}
constexpr P pair_U_V(other); // expected-error {{must be initialized by a constant expression}}
}
{
using P = std::pair<ImplicitT, ImplicitT>;
constexpr std::pair<int, int> other;
constexpr ImplicitT i = 99;
constexpr P const_U_V = {i, i}; // expected-error {{must be initialized by a constant expression}}
constexpr P U_V = {42, 101}; // expected-error {{must be initialized by a constant expression}}
constexpr P pair_U_V = other; // expected-error {{must be initialized by a constant expression}}
}
return 0;
}
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