From 3667be9e51ac657494f4147f346660008d50cd67 Mon Sep 17 00:00:00 2001
From: mryouse
Date: Sun, 12 Jun 2022 23:04:04 +0000
Subject: implement assert

---
 interpreter.py | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'interpreter.py')

diff --git a/interpreter.py b/interpreter.py
index 4887c52..c7a2d40 100644
--- a/interpreter.py
+++ b/interpreter.py
@@ -773,3 +773,9 @@ def interpretUse(symbol, args, env):
 
 GLOBALS.register("use", Builtin(interpretUse, [Arg("filename", T.String, False, False)]))
 
+def interpretAssert(symbol, args, env, ns):
+    if args[0].value != True:
+        raise InterpretPanic(symbol, "assertion failed")
+    return List([])
+
+GLOBALS.register("assert", Builtin(interpretAssert, [Arg("cond", T.Bool, False, False)]))
-- 
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