1 files changed, 39 insertions, 0 deletions
diff --git a/lib/exTpl/SymbolExpression.php b/lib/exTpl/SymbolExpression.php
new file mode 100644
index 0000000..178a51f
--- /dev/null
+++ b/lib/exTpl/SymbolExpression.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace exTpl;
+
+/**
+ * SymbolExpression represents a symbol (template variable).
+ */
+class SymbolExpression implements Expression
+{
+    protected string $name;
+
+    /**
+     * Initializes a new Expression instance.
+     *
+     * @param string $name      symbol name
+     */
+    public function __construct(string $name)
+    {
+        $this->name = $name;
+    }
+
+    /**
+     * Returns the name of this symbol.
+     */
+    public function name(): string
+    {
+        return $this->name;
+    }
+
+    /**
+     * Returns the value of this expression.
+     *
+     * @param Context $context  symbol table
+     */
+    public function value(Context $context): mixed
+    {
+        return $context->lookup($this->name);
+    }
+}