forked from mirror/libcxx
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.
58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// 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()
|
|
{
|
|
{
|
|
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}}
|
|
}
|
|
}
|