[vala/staging] vala: Simplify Expression.parent_statement

[Rico Tzschichholz <ricotz src gnome org>]

commit d39357dc883f08bfbf5155ce03b748f4e077893c
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue Feb 16 22:42:00 2021 +0100

    vala: Simplify Expression.parent_statement

 vala/valaexpression.vala | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)
---
diff --git a/vala/valaexpression.vala b/vala/valaexpression.vala
index a02cc1c1f..53983682e 100644
--- a/vala/valaexpression.vala
+++ b/vala/valaexpression.vala
@@ -104,18 +104,14 @@ public abstract class Vala.Expression : CodeNode {
 
        public Statement? parent_statement {
                get {
-                       unowned Expression? expr = parent_node as Expression;
-                       unowned Statement? stmt = parent_node as Statement;
-                       unowned LocalVariable? local = parent_node as LocalVariable;
-                       unowned MemberInitializer? initializer = parent_node as MemberInitializer;
-                       if (stmt != null) {
+                       if (parent_node is MemberInitializer) {
+                               return ((Expression) parent_node.parent_node).parent_statement;
+                       } else if (parent_node is LocalVariable) {
+                               return (Statement) parent_node.parent_node;
+                       } else if (parent_node is Statement) {
                                return (Statement) parent_node;
-                       } else if (expr != null) {
-                               return expr.parent_statement;
-                       } else if (local != null) {
-                               return (Statement) local.parent_node;
-                       } else if (initializer != null) {
-                               return ((Expression)initializer.parent_node).parent_statement;
+                       } else if (parent_node is Expression) {
+                               return ((Expression) parent_node).parent_statement;
                        } else {
                                return null;
                        }