[keep it simple] do not inject merge to cell -- just use the global m…

…erge

- 也许用多线程的 C 实现时，cell 才应该有自己的局部 merge 函数

src/cell/Cell.ts

@@ -1,28 +1,16 @@
-import { merge } from "../merge/index.js"
 import type { Propagator } from "../propagator/index.js"
 import { nothing, type Nothing } from "./Nothing.js"
 
-export type Merge<T> = (content: T | Nothing, increment: any) => T | Nothing
-
 export type Cell<T> = {
   "@type": "Cell"
   content: T | Nothing
   propagators: Array<Propagator>
-  merge: Merge<T>
 }
 
-export function Cell<T>(
-  content?: T,
-  options: {
-    merge: Merge<T>
-  } = {
-    merge,
-  },
-): Cell<T> {
+export function Cell<T>(content?: T): Cell<T> {
   return {
     "@type": "Cell",
     content: content || nothing,
     propagators: [],
-    merge: options.merge,
   }
 }

src/cell/put.ts

@@ -1,9 +1,9 @@
-import { detectMergeConflict } from "../merge/index.js"
+import { detectMergeConflict, merge } from "../merge/index.js"
 import { schedule } from "../scheduler/index.js"
 import { type Cell } from "./Cell.js"
 
 export function put<T>(cell: Cell<T>, increment?: T): void {
-  const newContent = cell.merge(cell.content, increment)
+  const newContent = merge(cell.content, increment)
   if (newContent === cell.content) {
     return
   }