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@@ -2,4 +2,65 @@
 
 源码--》词法分析--》生成词法数组--》语法parser--》ast树
 
-浏览器会把源码转换成ast树再转换成字节码
\ No newline at end of file
+浏览器会把源码转换成ast树再转换成字节码
+
+![debugger](./img/1.png)
+
+## ast 构建细节
+
+遍历源码进行分词算法生成`tokens`数组，再遍历`tokens`数组进行语法解析，最终生成ast树，顶层是一个`Program`程序，
+start代码开始位置，end是代码结束位置，body是具体代码内容。
+
+![debugger](./img/2.png)
+
+主要的代码映射关系`Identifier`标识符是a,`init`初始化为1
+
+```json
+{
+  "type": "VariableDeclaration",
+  "start": 0,
+  "end": 10,
+  "declarations": [
+    {
+      "type": "VariableDeclarator",
+      "start": 4,
+      "end": 9,
+      "id": {
+        "type": "Identifier",
+        "start": 4,
+        "end": 5,
+        "name": "a"
+      },
+      "init": {
+        "type": "Literal",
+        "start": 8,
+        "end": 9,
+        "value": 1,
+        "raw": "1"
+      }
+    }
+  ],
+  "kind": "var"
+}
+```
+
+为什么要分词生成`tokens`数组
+
+![debugger](./img/3.png)
+
+## babel 核心模块
+
+![debugger](./img/4.png)
+
+## 理解path和node
+
+path就是路径，node就是节点，找到某个node节点必须通过path，所有node节点都是绝对路径
+
+![debugger](./img/5.png)
+
+## path api
+
+node可以通过path上api进行操作的
+
+![debugger](./img/6.png)
+
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diff --git a/猿人学练习/23综合离谱的protobuf与jsvmp/23.py b/猿人学练习/23综合离谱的protobuf与jsvmp/23.py
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+++ b/猿人学练习/23综合离谱的protobuf与jsvmp/23.py
@@ -0,0 +1,4 @@
+import pywasm
+vm = pywasm.load("./main.wasm")
+r = vm.exec("encode", [12312431240, 312431423214])
+print(r)