refactor(core): export types from primitives

export Version type and a type for linkedSignal previous value so they can be used for the Wiz implementations

(cherry picked from commit 104f7d5)

Author: tsc036

goldens/public-api/core/primitives/signals/index.api.md

@@ -20,10 +20,7 @@ export interface BaseEffectNode extends ReactiveNode {
 }
 
 // @public (undocumented)
-export type ComputationFn<S, D> = (source: S, previous?: {
-    source: S;
-    value: D;
-}) => D;
+export type ComputationFn<S, D> = (source: S, previous?: PreviousValue<S, D>) => D;
 
 // @public
 export interface ComputedNode<T> extends ReactiveNode {
@@ -101,6 +98,12 @@ export function linkedSignalSetFn<S, D>(node: LinkedSignalNode<S, D>, newValue:
 // @public (undocumented)
 export function linkedSignalUpdateFn<S, D>(node: LinkedSignalNode<S, D>, updater: (value: D) => D): void;
 
+// @public (undocumented)
+export type PreviousValue<S, D> = {
+    source: S;
+    value: D;
+};
+
 // @public
 export function producerAccessed(node: ReactiveNode): void;
 
@@ -220,6 +223,11 @@ export function untracked<T>(nonReactiveReadsFn: () => T): T;
 // @public
 export type ValueEqualityFn<T> = (a: T, b: T) => boolean;
 
+// @public (undocumented)
+export type Version = number & {
+    __brand: 'Version';
+};
+
 // @public (undocumented)
 export interface Watch {
     // (undocumented)

packages/core/primitives/signals/index.ts

@@ -13,6 +13,7 @@ export {
   ComputationFn,
   LinkedSignalNode,
   LinkedSignalGetter,
+  PreviousValue,
   createLinkedSignal,
   linkedSignalSetFn,
   linkedSignalUpdateFn,
@@ -45,6 +46,7 @@ export {
   runPostProducerCreatedFn,
   setActiveConsumer,
   setPostProducerCreatedFn,
+  Version,
 } from './src/graph';
 export {
   SIGNAL_NODE,

packages/core/primitives/signals/src/graph.ts

@@ -18,7 +18,7 @@ declare const ngDevMode: boolean | undefined;
 let activeConsumer: ReactiveNode | null = null;
 let inNotificationPhase = false;
 
-type Version = number & {__brand: 'Version'};
+export type Version = number & {__brand: 'Version'};
 
 /**
  * Global epoch counter. Incremented whenever a source signal is set.

packages/core/primitives/signals/src/linked_signal.ts

@@ -25,7 +25,8 @@ import {signalSetFn, signalUpdateFn} from './signal';
 // global `ngDevMode` type is defined.
 declare const ngDevMode: boolean | undefined;
 
-export type ComputationFn<S, D> = (source: S, previous?: {source: S; value: D}) => D;
+export type ComputationFn<S, D> = (source: S, previous?: PreviousValue<S, D>) => D;
+export type PreviousValue<S, D> = {source: S; value: D};
 
 export interface LinkedSignalNode<S, D> extends ReactiveNode {
   /**