1 files changed, 21 insertions, 0 deletions
diff --git a/lib/exTpl/UnaryExpression.php b/lib/exTpl/UnaryExpression.php
new file mode 100644
index 0000000..9979311
--- /dev/null
+++ b/lib/exTpl/UnaryExpression.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace exTpl;
+
+/**
+ * UnaryExpression represents a unary operator.
+ */
+abstract class UnaryExpression implements Expression
+{
+    protected Expression $expr;
+
+    /**
+     * Initializes a new Expression instance.
+     *
+     * @param Expression $expr  expression object
+     */
+    public function __construct(Expression $expr)
+    {
+        $this->expr = $expr;
+    }
+}