errorsProcess.make
Source src/Process.ts:3575 lines
export class class ProcessMakeInvalidLayerArgumentclass ProcessMakeInvalidLayerArgument {
name: string;
message: string;
stack: string;
cause: unknown;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
toString: () => string;
toJSON: () => unknown;
_tag: Tag;
argumentIndex: 3 | 4;
reason: string;
}
import DataData.const TaggedError: <"ProcessMakeInvalidLayerArgument">(tag: "ProcessMakeInvalidLayerArgument") => new <A>(args: VoidIfEmpty<{ readonly [P in keyof A as P extends "_tag" ? never : P]: A[P]; }>) => Cause.YieldableError & {
readonly _tag: "ProcessMakeInvalidLayerArgument";
} & Readonly<A>
Creates a tagged error class with a _tag discriminator.
When to use
Use when you need domain errors with discriminated-union handling.
Details
Like
Error
, but instances also carry a readonly _tag property,
enabling Effect.catchTag and Effect.catchTags for tag-based recovery.
The _tag is excluded from the constructor argument. Yielding an instance
inside Effect.gen fails the effect with this error.
Example (Recovering by tag)
import { Data, Effect } from "effect"
class NotFound extends Data.TaggedError("NotFound")<{
readonly resource: string
}> {}
class Forbidden extends Data.TaggedError("Forbidden")<{
readonly reason: string
}> {}
const program = Effect.gen(function*() {
return yield* new NotFound({ resource: "/users/42" })
})
const recovered = program.pipe(
Effect.catchTag("NotFound", (e) =>
Effect.succeed(`missing: ${e.resource}`))
)
TaggedError("ProcessMakeInvalidLayerArgument")<{
/** 1-based index of the invalid argument (`3` or `4`). */
readonly argumentIndex: 3 | 41-based index of the invalid argument (3 or 4).
argumentIndex: 3 | 4;
readonly reason: stringreason: string;
}> {}