1 files changed, 13 insertions, 0 deletions
diff --git a/expressions.h b/expressions.h
index 5d2aa0c..a441e90 100644
--- a/expressions.h
+++ b/expressions.h
@@ -100,6 +100,12 @@ public:
 	{
 		return top[-index];
 	}
+
+	inline void
+	clear(void)
+	{
+		top = stack;
+	}
 };
 
 /*
@@ -172,6 +178,13 @@ public:
 
 	int find_op(Operator op);
 
+	inline void
+	clear(void)
+	{
+		numbers.clear();
+		operators.clear();
+	}
+
 private:
 	void calc(void);