effect-io-ai

Package: effect
Module: SchemaTransformation

SchemaTransformation.passthroughSupertype

Transforms values without changing them, typed so that T extends E, where the decoded type T is a subtype of the encoded type E.

When to use

Use when you need a no-op schema transformation whose decoded side is narrower than the encoded side.

Details

Both decode and encode are no-ops and return a shared singleton transformation.

Example (Passing through supertypes)

import { SchemaTransformation } from "effect"

const t = SchemaTransformation.passthroughSupertype<"a" | "b", string>()

See

• passthrough
• passthroughSubtype

Signature

declare const passthroughSupertype: <T extends E, E>() => Transformation<T, E>

Source

Since v4.0.0