4 ms·

Can you expand on how errdefer works in zig? I'm not familiar.

• Jtsummers 2y ago
  https://ziglang.org/documentation/master/#errdefer https://ziglang.org/documentation/master/#errdefer defer always executes on scope exit, errdefer executes on an error exit. In principle, this is similar to the logic of a try/catch/finally: try { // whatever } catch { // errdefer would belong here } finally { // defer would happen here }
• loeg 2y ago
  Zig has a special / compiler-known ADT for "value OR error". This is similar to Result<T,E> in Rust. Or in C++, e.g., folly::Expected<T,E>. The Zig one is so special and compiler-blessed that there is special syntax for defer blocks that only run when the function return is an error variant of that result ADT -- errdefer.