Error API

Reference for TaggedError, exhaustive and partial matching, UnhandledException, codec errors, and Panic.

`TaggedError(tag)`

Factory for a generic Error subclass:

class NotFound extends TaggedError("NotFound")<{
  id: string;
  message: string;
}> {}

Instances expose _tag, declared properties, native Error fields, toJSON(), and generator iterator behavior. Concrete classes expose .is(value).

API	Behavior
`matchError(error, handlers)`	Exhaustive match over every `_tag`
`matchError(handlers)(error)`	Data-last exhaustive match
`matchErrorPartial(error, handlers)`	Handle selected tags; return others unchanged
`matchErrorPartial(error, handlers, fallback)`	Handle selected tags; transform others with fallback
`matchErrorPartial(handlers, fallback)(error)`	Data-last partial match

Handler return types are inferred as a union when they differ.

Returned by Result.try and Result.tryPromise when no custom catch translator is supplied.

Returned when a selected serialization schema reports validation issues.

Property	Type
`_tag`	`"ResultSerializationError"`
`value`	`unknown`
`issues`	optional readonly Standard Schema issues

Returned for an invalid serialized envelope or when a selected payload schema reports issues.

Property	Type
`_tag`	`"ResultDeserializationError"`
`value`	`unknown`
`issues`	optional readonly Standard Schema issues; absent for an invalid envelope

Thrown for defects. Exposes _tag: "Panic", message, optional cause, toJSON(), static .is, and generator iterator behavior.

Throws a new Panic and returns never at the type level.