Error payloads in Zig
Summary
This article explains how to implement error payloads in Zig using a union(enum)-based Diagnostics type for function-level errors, reducing boilerplate at call sites. It demonstrates generating an error set from the payload enum, using withContext to attach payloads, and copying payloads across diagnostics via diag.call. It also covers a BuildDiagnostics pattern to manage multiple error payloads for batch processing and logging.