From 57c14ee840872853fe3a7ba3141bab5f7a60e6ce Mon Sep 17 00:00:00 2001
From: mryouse
Date: Tue, 24 May 2022 03:36:08 +0000
Subject: return empty lists as-is

---
 interpreter.py | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'interpreter.py')

diff --git a/interpreter.py b/interpreter.py
index 576af47..09f298b 100644
--- a/interpreter.py
+++ b/interpreter.py
@@ -101,6 +101,9 @@ def evaluate(expr, env):
     # if it's a literal list, return it
     if expr.data:
         return expr
+    # if it's an empty list, return it
+    elif len(expr.args) == 0:
+        return expr
 
     if not isinstance(expr.args[0], Symbol):
         raise Exception("can't evaluate without a symbol")
-- 
cgit v1.2.3