Error handling in Zig

[kj4tmp]

Allow returning a value with an error

The colloquial meaning of an error is perhaps not well aligned with zig’s error unions. Zig’s error unions could be used to mean “bad thing happened” but it doesn’t fit all use cases. The current design of errors is closer to “a refusal to return a value”. Its like returning null but you have the ability to switch on the errors for control flow. In the issue, Andrew says “error codes are for control flow”. One could also interpret this as “error codes are not informative”, or “error codes are n…