Module errors 

Shared error-domain model and naming policy.

Every errors: domain declared anywhere in the API is flattened into a single, de-duplicated list (all) so all backends surface the same typed errors, and the idiomatic naming policy is centralized here so we never again emit drift like KEY_NOT_FOUNDError (raw SCREAMING_SNAKE with a naive Error suffix) in one language and keyNotFound in another.

Backends pick the brand/suffix that matches their ecosystem (ERROR_BRAND for Swift/Python/TS/C++/Ruby/Go, EXCEPTION_BRAND for Kotlin/.NET/Dart) and case-convert each code’s ResolvedError::raw_name through the helpers below.

Structs

ResolvedError

A single error code, flattened across the whole API.

Constants

BRAND_STEM

Canonical brand stem. Always WeaveFFI (uppercase FFI) — never the heck-derived Weaveffi that several generators used to emit.

ERROR_BRAND

Base error type for ecosystems that use the Error suffix (Swift, Python, TypeScript/Node, C++, Ruby, Go).

EXCEPTION_BRAND

Base exception type for ecosystems that use the Exception suffix (Kotlin/Android, .NET, Dart).

Functions

all

All error codes declared anywhere in the API, in module-declaration order (depth-first), de-duplicated by raw_name (first occurrence wins). Returns an empty vec when the API declares no error domains.

has_domains

Whether the API declares any error domains at all.

pascal

PascalCase form of a raw error code name, with no suffix. KEY_NOT_FOUND → KeyNotFound. Use for languages whose error variants are nested types/cases (Kotlin sealed subclasses, etc.) rather than standalone *Error classes.

type_name

PascalCase + exactly one suffix, avoiding doubled or SCREAMING suffixes. ("KEY_NOT_FOUND", "Error") → KeyNotFoundError; ("AlreadyError", "Error") → AlreadyError.