From 741eb7f5762112fdd2f83e1ffb332cf29a9e00c8 Mon Sep 17 00:00:00 2001
From: Robert Bendun <robben@st.amu.edu.pl>
Date: Wed, 25 May 2022 04:36:16 +0200
Subject: [PATCH] Result of evaluation is only printed when it's not nil

---
 src/main.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main.cc b/src/main.cc
index de76fa3..e49539d 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -66,7 +66,9 @@ struct Runner
 			dump(ast);
 			return {};
 		}
-		std::cout << Try(interpreter.eval(std::move(ast))) << std::endl;
+		if (auto result = Try(interpreter.eval(std::move(ast))); result.type != Value::Type::Nil) {
+			std::cout << result << std::endl;
+		}
 		return {};
 	}
 };