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95 lines
2.5 KiB
C++
95 lines
2.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <array>
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// implicitly generated array constructors / assignment operators
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#include <array>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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// std::array is explicitly allowed to be initialized with A a = { init-list };.
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// Disable the missing braces warning for this reason.
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#include "disable_missing_braces_warning.h"
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// In C++03 the copy assignment operator is not deleted when the implicitly
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// generated operator would be ill-formed; like in the case of a struct with a
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// const member.
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#if TEST_STD_VER < 11
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#define TEST_NOT_COPY_ASSIGNABLE(T) ((void)0)
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#else
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#define TEST_NOT_COPY_ASSIGNABLE(T) static_assert(!std::is_copy_assignable<T>::value, "")
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#endif
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struct NoDefault {
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NoDefault(int) {}
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};
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int main(int, char**) {
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{
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typedef double T;
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typedef std::array<T, 3> C;
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C c = {1.1, 2.2, 3.3};
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C c2 = c;
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c2 = c;
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static_assert(std::is_copy_constructible<C>::value, "");
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static_assert(std::is_copy_assignable<C>::value, "");
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}
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{
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typedef double T;
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typedef std::array<const T, 3> C;
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C c = {1.1, 2.2, 3.3};
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C c2 = c;
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((void)c2);
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static_assert(std::is_copy_constructible<C>::value, "");
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TEST_NOT_COPY_ASSIGNABLE(C);
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}
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{
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typedef double T;
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typedef std::array<T, 0> C;
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C c = {};
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C c2 = c;
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c2 = c;
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static_assert(std::is_copy_constructible<C>::value, "");
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static_assert(std::is_copy_assignable<C>::value, "");
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}
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{
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// const arrays of size 0 should disable the implicit copy assignment operator.
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typedef double T;
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typedef std::array<const T, 0> C;
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C c = {{}};
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C c2 = c;
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((void)c2);
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static_assert(std::is_copy_constructible<C>::value, "");
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TEST_NOT_COPY_ASSIGNABLE(C);
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}
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{
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typedef NoDefault T;
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typedef std::array<T, 0> C;
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C c = {};
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C c2 = c;
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c2 = c;
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static_assert(std::is_copy_constructible<C>::value, "");
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static_assert(std::is_copy_assignable<C>::value, "");
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}
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{
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typedef NoDefault T;
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typedef std::array<const T, 0> C;
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C c = {{}};
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C c2 = c;
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((void)c2);
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static_assert(std::is_copy_constructible<C>::value, "");
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TEST_NOT_COPY_ASSIGNABLE(C);
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}
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return 0;
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}
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