nim-error-handling

Nim error propagation works by raising exceptions and letting them bubble up to module boundaries, where low-level errors are translated into actionable messages with bounded context, avoiding ad-hoc result wrappers.

Nim parse helpers should catch CatchableError at the helper boundary and return false, ensuring predictable parse-failure behavior without leaking low-level exceptions to the caller.

Ad-hoc result wrappers in Nim are discouraged because they add unnecessary boilerplate and obscure failure context, whereas raising exceptions and letting them propagate to boundary translation points makes failures more predictable and actionable.

Yes, this Nim error handling approach is designed for multi-step pipelines and APIs, enforcing exception boundaries and translating low-level exceptions at module boundaries to uphold contracts and provide clear context.

Catch CatchableError in Nim only at recoverable helper boundaries, such as boolean parse helpers, to prevent ad-hoc exception handling and ensure failures remain predictable across the pipeline.