How to custom a template ast compiler ?

[tu6ge]

Hi, everyone, I have a new idea, I am trying to use rust to parse vue sfc template to ast, how about the performance. However, I attempted to hijack the official parse method in the following way and failed. Could you please tell me how to configure it correctly.

// vite.config.ts file
import { fileURLToPath, URL } from 'node:url'

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
//import {compileTemplate} from 'vue-template-compiler-rs'
import {transform, generate } from '@vue/compiler-dom'

function compileWithRust(template: string, options: any) {
  const ast_str = compileTemplate(template)  // using Rust compile
  //console.log(ast_str);
  let ast = JSON.parse(ast_str);
  //console.log(ast);
  transform(ast, options)                   // official transform
  return generate(ast, options)             // official codegen
}

// simple mocking compile
function compileTemplate(template: string):string {
  return JSON.stringify({
       "type":0,
        "children":[
            {
                "type":1,
                "tag":"div",
                "tagType":0,
                "isSelfClosing":false,
                "props":[],
                "children":[
                    {
                        "type":2,
                        "content":"msg",
                    }
                ],
                "ns":0,
            }
        ] 
  })
}

// https://vite.dev/config/
export default defineConfig({
  plugins: [
    vue({
      template:{
        compiler:{
          compile: compileWithRust,
          parse: (template:string,options:any)=>{
            //console.log(template);
            const astJson = compileTemplate(template)
            return JSON.parse(astJson)
          }
        },
      },
    }),
  ],
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('./src', import.meta.url))
    },
  },
})

error info:

13:27:29 [vite] Internal server error: Cannot read properties of undefined (reading 'type')
  Plugin: vite:vue
  File: /Users/tu6ge/rust/vue-example/src/App.vue
      at walk (/Users/tu6ge/rust/vue-example/node_modules/.pnpm/@[email protected]/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3031:25)
      at cacheStatic (/Users/tu6ge/rust/vue-example/node_modules/.pnpm/@[email protected]/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3003:3)
      at transform (/Users/tu6ge/rust/vue-example/node_modules/.pnpm/@[email protected]/node_modules/@vue/compiler-core/dist/compiler-core.cjs.js:3478:5)