| // PR c++/94074 - wrong modifying const object error for COMPONENT_REF. |
| // { dg-do compile { target c++14 } } |
| |
| typedef decltype (sizeof (0)) size_t; |
| |
| template <typename E, size_t N> |
| struct array |
| { |
| constexpr const E &operator[](size_t n) const noexcept { return elems[n]; } |
| const E elems[N]; |
| }; |
| |
| template <typename T> |
| struct S { |
| using U = array<T, 4>; |
| U m; |
| constexpr S(int) : m{} |
| { |
| const_cast<int &>(const_cast<const U &>(m)[0]) = 42; // { dg-error "modifying a const object" } |
| } |
| }; |
| |
| constexpr S<int> p = { 10 }; // { dg-message "originally declared" } |
