| 1 | // A bare-bones llvm::Optional reimplementation. |
| 2 | |
| 3 | template <typename T> struct MyOptionalStorage { |
| 4 | MyOptionalStorage(T val) : value(val), hasVal(true) {} |
| 5 | MyOptionalStorage() {} |
| 6 | T value; |
| 7 | bool hasVal = false; |
| 8 | }; |
| 9 | |
| 10 | template <typename T> struct MyOptional { |
| 11 | MyOptionalStorage<T> Storage; |
| 12 | MyOptional(T val) : Storage(val) {} |
| 13 | MyOptional() {} |
| 14 | T &operator*() { return Storage.value; } |
| 15 | }; |
| 16 | |
| 17 | void stop() {} |
| 18 | |
| 19 | int main(int argc, char **argv) { |
| 20 | MyOptional<int> x, y = 42; |
| 21 | stop(); // break here |
| 22 | return *y; |
| 23 | } |
| 24 | |