refactor: move deepFreeze and ngDevMode

Author: rainerhahnekamp

modules/signals/src/deep-freeze.ts

@@ -1,3 +1,5 @@
+declare const ngDevMode: boolean;
+
 export function deepFreeze<T>(target: T): T {
   Object.freeze(target);
 
@@ -29,6 +31,10 @@ export function deepFreeze<T>(target: T): T {
   return target;
 }
 
+export function freezeInDevMode<State extends object>(value: State): State {
+  return ngDevMode ? deepFreeze(value) : value;
+}
+
 function hasOwnProperty(
   target: unknown,
   propertyName: string

modules/signals/src/state-source.ts

@@ -8,9 +8,7 @@ import {
   WritableSignal,
 } from '@angular/core';
 import { Prettify } from './ts-helpers';
-import { deepFreeze } from './deep-freeze';
-
-declare const ngDevMode: boolean;
+import { freezeInDevMode } from './deep-freeze';
 
 const STATE_WATCHERS = new WeakMap<Signal<object>, Array<StateWatcher<any>>>();
 
@@ -53,10 +51,6 @@ export function patchState<State extends object>(
   notifyWatchers(stateSource);
 }
 
-function freezeInDevMode<State extends object>(value: State): State {
-  return ngDevMode ? deepFreeze(value) : value;
-}
-
 export function getState<State extends object>(
   stateSource: StateSource<State>
 ): State {