120 lines
3.6 KiB
C++
120 lines
3.6 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <array>
|
|
|
|
// implicitly generated array constructors / assignment operators
|
|
|
|
#include <array>
|
|
#include <type_traits>
|
|
#include <cassert>
|
|
#include "test_macros.h"
|
|
|
|
// In C++03 the copy assignment operator is not deleted when the implicitly
|
|
// generated operator would be ill-formed; like in the case of a struct with a
|
|
// const member.
|
|
#if TEST_STD_VER < 11
|
|
# define TEST_NOT_COPY_ASSIGNABLE(T) ((void)0)
|
|
#else
|
|
# define TEST_NOT_COPY_ASSIGNABLE(T) static_assert(!std::is_copy_assignable<T>::value, "")
|
|
#endif
|
|
|
|
struct NoDefault {
|
|
TEST_CONSTEXPR NoDefault(int) { }
|
|
};
|
|
|
|
struct NonTrivialCopy {
|
|
TEST_CONSTEXPR NonTrivialCopy() { }
|
|
TEST_CONSTEXPR NonTrivialCopy(NonTrivialCopy const&) { }
|
|
TEST_CONSTEXPR_CXX14 NonTrivialCopy& operator=(NonTrivialCopy const&) { return *this; }
|
|
};
|
|
|
|
TEST_CONSTEXPR_CXX14 bool tests()
|
|
{
|
|
{
|
|
typedef std::array<double, 3> Array;
|
|
Array array = {1.1, 2.2, 3.3};
|
|
Array copy = array;
|
|
copy = array;
|
|
static_assert(std::is_copy_constructible<Array>::value, "");
|
|
static_assert(std::is_copy_assignable<Array>::value, "");
|
|
}
|
|
{
|
|
typedef std::array<double const, 3> Array;
|
|
Array array = {1.1, 2.2, 3.3};
|
|
Array copy = array; (void)copy;
|
|
static_assert(std::is_copy_constructible<Array>::value, "");
|
|
TEST_NOT_COPY_ASSIGNABLE(Array);
|
|
}
|
|
{
|
|
typedef std::array<double, 0> Array;
|
|
Array array = {};
|
|
Array copy = array;
|
|
copy = array;
|
|
static_assert(std::is_copy_constructible<Array>::value, "");
|
|
static_assert(std::is_copy_assignable<Array>::value, "");
|
|
}
|
|
{
|
|
// const arrays of size 0 should disable the implicit copy assignment operator.
|
|
typedef std::array<double const, 0> Array;
|
|
Array array = {};
|
|
Array copy = array; (void)copy;
|
|
static_assert(std::is_copy_constructible<Array>::value, "");
|
|
TEST_NOT_COPY_ASSIGNABLE(Array);
|
|
}
|
|
{
|
|
typedef std::array<NoDefault, 0> Array;
|
|
Array array = {};
|
|
Array copy = array;
|
|
copy = array;
|
|
static_assert(std::is_copy_constructible<Array>::value, "");
|
|
static_assert(std::is_copy_assignable<Array>::value, "");
|
|
}
|
|
{
|
|
typedef std::array<NoDefault const, 0> Array;
|
|
Array array = {};
|
|
Array copy = array; (void)copy;
|
|
static_assert(std::is_copy_constructible<Array>::value, "");
|
|
TEST_NOT_COPY_ASSIGNABLE(Array);
|
|
}
|
|
|
|
// Make sure we can implicitly copy a std::array of a non-trivially copyable type
|
|
{
|
|
typedef std::array<NonTrivialCopy, 0> Array;
|
|
Array array = {};
|
|
Array copy = array;
|
|
copy = array;
|
|
static_assert(std::is_copy_constructible<Array>::value, "");
|
|
}
|
|
{
|
|
typedef std::array<NonTrivialCopy, 1> Array;
|
|
Array array = {};
|
|
Array copy = array;
|
|
copy = array;
|
|
static_assert(std::is_copy_constructible<Array>::value, "");
|
|
}
|
|
{
|
|
typedef std::array<NonTrivialCopy, 2> Array;
|
|
Array array = {};
|
|
Array copy = array;
|
|
copy = array;
|
|
static_assert(std::is_copy_constructible<Array>::value, "");
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int main(int, char**)
|
|
{
|
|
tests();
|
|
#if TEST_STD_VER >= 14
|
|
static_assert(tests(), "");
|
|
#endif
|
|
return 0;
|
|
}
|