packages/reffuse/src/ReffuseContext.tsx

@@ -1,4 +1,4 @@
-import { Context, Effect, Layer, Runtime } from "effect"
+import { Array, Context, Effect, Layer, Runtime } from "effect"
 import React from "react"
 import * as ReffuseRuntime from "./ReffuseRuntime.js"
 
@@ -60,8 +60,14 @@ export function useMergeAll<
     return React.useMemo(() => Context.mergeAll(...values), values)
 }
 
+export function useMergeAllLayers<
+    const Contexts extends Array.NonEmptyReadonlyArray<ReffuseContext<any>>
+>(
+    ...contexts: Contexts
+): Layer.Layer<{ [K in keyof Contexts]: R<Contexts[K]> }[number]> {
+    const values = Array.map(contexts, v => React.use(v.Context))
 
-const context1 = make<{ readonly service1: true }>()
-const context2 = make<{ readonly service2: true }>()
-
-const res = useMergeAll(context1, context2)
+    return React.useMemo(() => Layer.mergeAll(
+        ...Array.map(values, context => Layer.effectContext(Effect.succeed(context)))
+    ) as Layer.Layer<any>, values)
+}