fix: support getIsAsync for macro

Author: sxzz

src/index.ts

@@ -142,6 +142,7 @@ export function toGenerator<T>(promise: Promise<T> | QuansyncGenerator<T> | T):
 /**
  * @returns `true` if the current context is async, `false` otherwise.
  */
-export function* getIsAsync(): Generator<typeof GET_IS_ASYNC, boolean, unknown> {
-  return !!(yield GET_IS_ASYNC)
-}
+export const getIsAsync = quansync({
+  async: () => Promise.resolve(true),
+  sync: () => false,
+})

test/index.test.ts

@@ -285,7 +285,7 @@ it('call onYield hook', async () => {
 
 it('getIsAsync', async () => {
   const fn = quansync(function* () {
-    const isAsync: boolean = yield* getIsAsync()
+    const isAsync = (yield getIsAsync()) as boolean
     return isAsync
   })
   await expect(fn.async()).resolves.toBe(true)