Fixing bugs. escaping things when pretty printing. adding reflect host function. getting further with tree view

src/ast.ts

@@ -180,7 +180,12 @@ export function prettyPrint(ast: AST, indent = 0): string {
         case 'literal': {
             const val = ast.value;
             if (val.kind === 'string') {
-                return `"${val.value}"`;
+                const escaped = val.value
+                    .replace(/\\/g, '\\\\')
+                    .replace(/"/g, '\\"')
+                    .replace(/\n/g, '\\n')
+                    .replace(/\t/g, '\\t');
+                return `"${escaped}"`;
             }
             return `${val.value}`;
         }