diff --git a/compiler/nodes.py b/compiler/nodes.py
index 50c1f8b..d72ec67 100644
--- a/compiler/nodes.py
+++ b/compiler/nodes.py
@@ -246,19 +246,20 @@ class Expression(Node):
     def intermediate_representation(self) -> list[ir.IRItem]:
         return self.node.intermediate_representation()
 
-    def __init__(self, node: Node):
+    def __init__(self, node: Node, *, pseudo_nodes: list[PseudoNode] = None):
         super().__init__()
         self.node = node
+        self.pseudo_nodes = pseudo_nodes
 
     def _values(self) -> list[Node | Any]:
-        return [self.node]
+        result = [self.node]
+        if self.pseudo_nodes is not None:
+            result += self.pseudo_nodes
+        return result
 
     def semantic_analysis(self, context: semantic.Context):
         return self.node.semantic_analysis(context)
 
-    def location(self) -> SourceLocation:
-        return self.node.location()
-
 
 class Statement(Node):