1 files changed, 31 insertions, 0 deletions
diff --git a/lib/exTpl/BooleanExpression.php b/lib/exTpl/BooleanExpression.php
new file mode 100644
index 0000000..0e18df0
--- /dev/null
+++ b/lib/exTpl/BooleanExpression.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace exTpl;
+
+/**
+ * BooleanExpression represents a boolean operator.
+ */
+class BooleanExpression extends BinaryExpression
+{
+    /**
+     * Returns the value of this expression.
+     *
+     * @param Context $context symbol table
+     */
+    public function value(Context $context): bool
+    {
+        $left  = $this->left->value($context);
+        $right = $this->right->value($context);
+
+        return match ($this->operator) {
+            T_IS_EQUAL            => $left == $right,
+            T_IS_NOT_EQUAL        => $left != $right,
+            '<'                   => $left < $right,
+            T_IS_SMALLER_OR_EQUAL => $left <= $right,
+            '>'                   => $left > $right,
+            T_IS_GREATER_OR_EQUAL => $left >= $right,
+            T_BOOLEAN_AND         => $left && $right,
+            T_BOOLEAN_OR          => $left || $right,
+        };
+    }
+}