From 6ba66daa8b170ec8d21f860305747574033fc939 Mon Sep 17 00:00:00 2001
From: Ian Piumarta <piumarta@gmail.com>
Date: Fri, 10 May 2024 03:21:32 +0900
Subject: [PATCH] Test user-defined AST nodes.

---
 test.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/test.txt b/test.txt
index 5419ceb..f0e016c 100644
--- a/test.txt
+++ b/test.txt
@@ -320,6 +320,21 @@ print("call testfun\n");
 
 testfun();
 
+// used-defined AST nodes are evaluated the same way as built-in types
+
+MakeSeven = Object.subtype(#MakeSeven);
+
+MakeSeven.__eval__(exp, env) {
+    print("MakeSeven.__eval__ invoked\n");
+    7;
+}
+
+myNode = MakeSeven.new();
+
+ast = (`6 * @myNode;); // user-defined node in AST
+
+print("AST eval => ", eval(ast), "\n");
+
 for (i from 0 to 10) 		     print(i, " ");  print("\n");
 for (i from 10 to 0) 		     print(i, " ");  print("\n");
 for (i in 10)        		     print(i, " ");  print("\n");