Letting us redefine functions, reactively

src/runtime-js.ts

@@ -1,3 +1,7 @@
+import { tokenize } from './lexer'
+import { Parser } from './parser'
+import { recompile } from './compiler'
+
 export const store: Record<string, any> = {};
 
 export const _rt = {
@@ -42,7 +46,11 @@ export const _rt = {
     },
     rebind: (name: string, pathOrValue: any, maybeValue?: any) => {
         if (maybeValue === undefined) {
-            store[name] = pathOrValue;
+            if (pathOrValue && pathOrValue.ast) {
+                recompile(name, pathOrValue._ast);
+            } else {
+                store[name] = pathOrValue;
+            }
         } else {
             const path = pathOrValue as string[];
             let obj = store[name];
@@ -109,5 +117,12 @@ export const _rt = {
             default:
                 return { width: 0, height: 0 };
         }
+    },
+    redefine: (name: string) => (code: string) => {
+        const tokens = tokenize(`_tmp = ${code};`);
+        const parser = new Parser(tokens, "");
+        const defs = parser.parse();
+        recompile(name, defs[0]. body);
+        return { _tag: 'Ok' };
     }
 }