types: typing for ref macros

packages/runtime-core/src/helpers/refMacros.ts

@@ -0,0 +1,21 @@
+import { Ref, UnwrapRef, ShallowUnwrapRef, ComputedRef } from '@vue/reactivity'
+
+export function $ref<T>(arg: T | Ref<T>): UnwrapRef<T>
+export function $ref() {}
+
+declare const ComputedRefMarker: unique symbol
+type ComputedRefValue<T> = T & { [ComputedRefMarker]?: any }
+
+export function $computed<T>(getter: () => T): ComputedRefValue<T>
+export function $computed() {}
+
+export function $fromRefs<T>(source: T): ShallowUnwrapRef<T>
+export function $fromRefs() {
+  return null as any
+}
+
+export function $raw<T>(value: ComputedRefValue<T>): ComputedRef<T>
+export function $raw<T>(value: T): Ref<T>
+export function $raw() {
+  return null as any
+}