Function hoist

packages/core/src/effect/layer-node.ts:211–248

(
  root: Node<A, E, any>,
  tag: T,
  replacements?: ValidReplacements<Items>,
)

}

export function hoist<A, E, T extends Tag, const Items extends Replacements = readonly []>(
  root: Node<A, E, any>,
  tag: T,
  replacements?: ValidReplacements<Items>,
): {
  readonly node: Node<A, E>
  readonly hoisted: Node<unknown, E>
} {
  const hoisted = new Map<string, AnyNode>()
  const replacementMap = replacementMapFrom(replacements)

  const node = walk<AnyNode>(
    root,
    (node, context) => {
      if (node.kind === "group") {
        return { ...node, dependencies: node.dependencies.map(context.visit) }
      }
      if (node.tag === tag) {
        const existing = hoisted.get(node.name)
        if (existing && existing !== node) {
          throw new Error(`Tag ${tag} has conflicting implementations for ${node.name}`)
        }
        hoisted.set(node.name, node)
        return group([])
      }
      if (node.kind === "unbound") {
        return node
      }
      return { ...node, dependencies: node.dependencies.map(context.visit) }
    },
    { resolve: (node) => replacementMap.get(node.name) ?? node },
  )

  return {
    node: node as Node<A, E>,
    hoisted: group(Array.from(hoisted.values())) as Node<unknown, E>,
  }
}

export function compile<A, E, const Items extends Replacements = readonly []>(
  root: Node<A, E, any>,