| //===----------------------------------------------------------------------===// |
| // |
| // 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. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <array> |
| |
| // implicitly generated array constructors / assignment operators |
| |
| #include <array> |
| #include <type_traits> |
| #include <cassert> |
| #include "test_macros.h" |
| |
| // std::array is explicitly allowed to be initialized with A a = { init-list };. |
| // Disable the missing braces warning for this reason. |
| #include "disable_missing_braces_warning.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 { |
| NoDefault(int) {} |
| }; |
| |
| int main() { |
| { |
| typedef double T; |
| typedef std::array<T, 3> C; |
| C c = {1.1, 2.2, 3.3}; |
| C c2 = c; |
| c2 = c; |
| static_assert(std::is_copy_constructible<C>::value, ""); |
| static_assert(std::is_copy_assignable<C>::value, ""); |
| } |
| { |
| typedef double T; |
| typedef std::array<const T, 3> C; |
| C c = {1.1, 2.2, 3.3}; |
| C c2 = c; |
| ((void)c2); |
| static_assert(std::is_copy_constructible<C>::value, ""); |
| TEST_NOT_COPY_ASSIGNABLE(C); |
| } |
| { |
| typedef double T; |
| typedef std::array<T, 0> C; |
| C c = {}; |
| C c2 = c; |
| c2 = c; |
| static_assert(std::is_copy_constructible<C>::value, ""); |
| static_assert(std::is_copy_assignable<C>::value, ""); |
| } |
| { |
| // const arrays of size 0 should disable the implicit copy assignment operator. |
| typedef double T; |
| typedef std::array<const T, 0> C; |
| C c = {{}}; |
| C c2 = c; |
| ((void)c2); |
| static_assert(std::is_copy_constructible<C>::value, ""); |
| TEST_NOT_COPY_ASSIGNABLE(C); |
| } |
| { |
| typedef NoDefault T; |
| typedef std::array<T, 0> C; |
| C c = {}; |
| C c2 = c; |
| c2 = c; |
| static_assert(std::is_copy_constructible<C>::value, ""); |
| static_assert(std::is_copy_assignable<C>::value, ""); |
| } |
| { |
| typedef NoDefault T; |
| typedef std::array<const T, 0> C; |
| C c = {{}}; |
| C c2 = c; |
| ((void)c2); |
| static_assert(std::is_copy_constructible<C>::value, ""); |
| TEST_NOT_COPY_ASSIGNABLE(C); |
| } |
| |
| } |