refactor!: overhaul interpreter (#3)

* feat: use ESTree for the AST types

* feat: implement all update, unary, logical and assignment operators

* chore: update remaining nodes

* chore: update examples and tests

* chore: remove trailing spaces

* feat: add support for arrow functions

* chore: update readme and bump deps

README.md

@@ -1,13 +1,9 @@
 [actions]: https://github.com/LuanRT/Jinter/actions
 [say-thanks]: https://saythanks.io/to/LuanRT
 
-<h1 align=center>
-  Jinter
-</h1>
+<h1 align=center>Jinter</h1>
 
-<p align=center>
-   <i>A tiny JavaScript interpreter written in TypeScript</i>
-</p>
+<p align=center>A tiny JavaScript interpreter written in TypeScript
 
 <div align="center">
 
@@ -16,7 +12,7 @@
 
 </div>
 
-> **Note**: This project is experimental and not all JavaScript features are implemented! [^1]
+> **Note**: This project was originally developed for use in [YouTube.js](https://github.com/LuanRT/YouTube.js).
 
 ### Usage
 
@@ -37,38 +33,39 @@ const jinter = new Jinter(code);
 jinter.interpret();
 ```
 ---
-Inject your own functions and variables into the interpreter;
+Inject your own functions and variables into the interpreter:
 ```ts
 // ...
 
-jinter.visitor.on('println', (node: any, visitor: Visitor) => {
-  const args = node.arguments.map((arg: any) => visitor.visitNode(arg));
-  return console.log(...args);
+jinter.visitor.on('println', (node, visitor) => {
+  if (node.type === 'CallExpression' && node.callee.type === 'MemberExpression') {
+    const args = node.arguments.map((arg) => visitor.visitNode(arg));
+    return console.log(...args);
+  }
 });
 
 // Ex: str.toArray();
-jinter.visitor.on('toArray', (node: any, visitor: Visitor) => {
-  const obj = visitor.visitNode(node.callee.object);
-  return obj.split('');      
+jinter.visitor.on('toArray', (node, visitor) => {
+  if (node.type === 'CallExpression' && node.callee.type === 'MemberExpression') {
+    const obj = visitor.visitNode(node.callee.object);
+    return obj.split('');    
+  }  
 });
 
 // Or you can just intercept access to specific nodes;
-jinter.visitor.on('myFn', (node: any, visitor: Visitor) => {
+jinter.visitor.on('myFn', (node, visitor) => {
   console.info('MyFn node just got accessed:', node);
   return 'proceed'; // tells the interpreter to continue execution 
 });
 
 jinter.interpret();
 ```
 
-More examples are available in the [`test`](/test) & [`examples`](/examples) folders.
+For more examples see [`/test`](https://github.com/LuanRT/Jinter/tree/main/test) and [`/examples`](https://github.com/LuanRT/Jinter/tree/main/examples).
 
 ## License
 Distributed under the [MIT](https://choosealicense.com/licenses/mit/) License.
 
-<!-- Footnotes -->
-[^1]: This project was originally developed for use in [YouTube.js](https://github.com/LuanRT/YouTube.js).
-
 <p align="right">
   (<a href="#top">back to top</a>)
 </p>

acorn.d.ts

@@ -1,17 +1,14 @@
 import * as ESTree from 'estree';
 
 declare module 'acorn' {
-  export function parse(s: string, o: Options): ESTree.Program;
+  type ExtendNode<T> = {
+    [K in keyof T]: T[K] extends object ? ExtendNode<T[K]> : T[K];
+  } & (T extends ESTree.Node
+    ? {
+      start: number;
+      end: number;
+    }
+    : unknown);
 
-  // fix type of Comment property 'type'
-  export type AcornComment = Omit<Comment, 'type'> & {
-    type: 'Line' | 'Block';
-  };
-}
-
-declare module 'estree' {
-  interface BaseNodeWithoutComments {
-    start: number;
-    end: number;
-  }
+  export function parse(s: string, o: Options): ExtendNode<ESTree.Program>;
 }

examples/index.ts

@@ -0,0 +1,10 @@
+import fs from 'fs';
+import Jinter from '../dist';
+
+const code = fs.readFileSync('./test-code.js').toString();
+
+const jinter = new Jinter(code);
+jinter.scope.set('ntoken', 'vPIcacaohWtfY_');
+const result = jinter.interpret();
+
+console.info('Transformed sig:', result);