From 7c6d625d088ffcd48612e86b210d1232f7f8c85c Mon Sep 17 00:00:00 2001
From: Marc-Andre Lafortune <github@marc-andre.ca>
Date: Thu, 24 Sep 2020 03:20:05 -0400
Subject: [PATCH] Add `Node#parent?` and `Node#root?`

---
 CHANGELOG.md            |  4 ++++
 lib/rubocop/ast/node.rb | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b18d71945..bc48f559d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## master (unreleased)
 
+### New features
+
+* [#122](https://github.com/rubocop-hq/rubocop-ast/pull/122): Add `Node#parent?` and `Node#root?`. ([@marcandre][])
+
 ### Changes
 
 * [#121](https://github.com/rubocop-hq/rubocop-ast/pull/121): Update from `Parser::Ruby28` to `Parser::Ruby30` for Ruby 3.0 parser (experimental). ([@koic][])
diff --git a/lib/rubocop/ast/node.rb b/lib/rubocop/ast/node.rb
index 3ab160625..49ab65475 100644
--- a/lib/rubocop/ast/node.rb
+++ b/lib/rubocop/ast/node.rb
@@ -92,6 +92,16 @@ def parent=(node)
         @mutable_attributes[:parent] = node
       end
 
+      # @return [Boolean]
+      def parent?
+        !!parent
+      end
+
+      # @return [Boolean]
+      def root?
+        !parent
+      end
+
       def complete!
         @mutable_attributes.freeze
         each_child_node(&:complete!)