Adding getSource native function

src/compiler.ts

@@ -103,7 +103,7 @@ function sanitize(name: string): string {
 
     if (ops[name]) return ops[name];
 
-    const natives = ['measure', 'measureText', 'storeSearch', 'debug', 'len', 'slice', 'str', 'redefine'];
+    const natives = ['measure', 'measureText', 'storeSearch', 'getSource', 'debug', 'len', 'slice', 'str', 'redefine'];
     if (natives.includes(name)) return `_rt.${name}`;
 
     const reserved = [

src/runtime-js.ts

@@ -1,6 +1,7 @@
 import { tokenize } from './lexer'
 import { Parser } from './parser'
-import { recompile } from './compiler'
+import { recompile, definitions } from './compiler'
+import { prettyPrint } from './ast'
 
 export const store: Record<string, any> = {};
 
@@ -44,6 +45,11 @@ export const _rt = {
         }
         return results;
     },
+    getSource: (name: string) => {
+        const ast = definitions.get(name);
+        if (!ast) return "";
+        return prettyPrint(ast);
+    },
     rebind: (name: string, pathOrValue: any, maybeValue?: any) => {
         if (maybeValue === undefined) {
             if (pathOrValue && pathOrValue.ast) {