Error payloads in Zig
3 months ago
- #Error Handling
- #Zig
- #Diagnostics
- Error payloads in Zig are handled using a union(enum)-based Diagnostics type for each function.
- The Diagnostics type can be defined inline, and the errorset is generated inline from the Diagnostic’s enum tag.
- A wrapper type around an optional payload is generated, with methods to manage error contexts.
- The `withContext` method is used to set a payload while returning an error.
- Call sites can avoid boilerplate by using the `call` method, which handles error payload copying automatically.
- Explicit type annotations may be needed for ZLS (Zig Language Server) to infer types correctly.