Re-add unsafe_ exports as deprecated

To smooth the transition for any packages relying on these exports.

packages/compiler/src/experimental/index.ts

@@ -11,4 +11,5 @@ export {
   mutateSubgraphWithNamespace as unsafe_mutateSubgraphWithNamespace,
 } from "./mutators.js";
 export { Realm as unsafe_Realm } from "./realm.js";
+export { unsafe_useStateMap, unsafe_useStateSet } from "./state-accessor.js";
 export { $ as unsafe_$ } from "./typekit/index.js";

packages/compiler/src/experimental/state-accessor.ts

@@ -0,0 +1,30 @@
+import type { Program } from "../core/program.js";
+import type { Type } from "../core/types.js";
+
+type StateMapGetter<K extends Type, V> = (program: Program, type: K) => V | undefined;
+type StateMapSetter<K extends Type, V> = (program: Program, type: K, value: V) => void;
+type StateMapMapGetter<K extends Type, V> = (program: Program) => Map<K, V>;
+
+/** @deprecated use `useStateMap` from `@typespec/compiler/utils` instead */
+export function unsafe_useStateMap<K extends Type, V>(
+  key: symbol,
+): [StateMapGetter<K, V>, StateMapSetter<K, V>, StateMapMapGetter<K, V>] {
+  const getter = (program: Program, target: K) => program.stateMap(key).get(target);
+  const setter = (program: Program, target: K, value: V) =>
+    program.stateMap(key).set(target, value);
+  const mapGetter = (program: Program) => program.stateMap(key);
+  return [getter, setter, mapGetter as any];
+}
+
+type StateSetGetter<K extends Type> = (program: Program, type: K) => boolean;
+type StateSetSetter<K extends Type> = (program: Program, type: K) => void;
+
+/** @deprecated use `useStateSet` from `@typespec/compiler/utils` instead */
+export function unsafe_useStateSet<K extends Type>(
+  key: symbol,
+): [StateSetGetter<K>, StateSetSetter<K>] {
+  const getter = (program: Program, target: K) => program.stateSet(key).has(target);
+  const setter = (program: Program, target: K) => program.stateSet(key).add(target);
+
+  return [getter, setter];
+}