https://git.ruby-lang.org/ruby.git/commit/?id=7b7e5153e8

From 7b7e5153e81288fe57ae64f2e1db228435156aeb Mon Sep 17 00:00:00 2001
From: manga_osyo <manga.osyo@g...>
Date: Mon, 10 Oct 2022 12:30:35 +0900
Subject: [ruby/pp] [Feature #19045] Add support Data#pretty_print

https://github.com/ruby/pp/commit/343a20d721
---
 lib/pp.rb       | 20 ++++++++++++++++++++
 test/test_pp.rb |  9 +++++++++
 2 files changed, 29 insertions(+)

diff --git a/lib/pp.rb b/lib/pp.rb
index f43356a3df..81551aa116 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -416,6 +416,26 @@ class Struct # :nodoc: https://github.com/ruby/ruby/blob/trunk/lib/pp.rb#L416
   end
 end
 
+class Data # :nodoc:
+  def pretty_print(q) # :nodoc:
+    q.group(1, sprintf("#<data %s", PP.mcall(self, Kernel, :class).name), '>') {
+      q.seplist(PP.mcall(self, Data, :members), lambda { q.text "," }) {|member|
+        q.breakable
+        q.text member.to_s
+        q.text '='
+        q.group(1) {
+          q.breakable ''
+          q.pp public_send(member)
+        }
+      }
+    }
+  end
+
+  def pretty_print_cycle(q) # :nodoc:
+    q.text sprintf("#<data %s:...>", PP.mcall(self, Kernel, :class).name)
+  end
+end if "3.2" <= RUBY_VERSION
+
 class Range # :nodoc:
   def pretty_print(q) # :nodoc:
     q.pp self.begin
diff --git a/test/test_pp.rb b/test/test_pp.rb
index 9cef555d79..4fcb8df4b0 100644
--- a/test/test_pp.rb
+++ b/test/test_pp.rb
@@ -152,6 +152,15 @@ class PPCycleTest < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/test_pp.rb#L152
     assert_equal("#{a.inspect}\n", PP.pp(a, ''.dup))
   end
 
+  if "3.2" <= RUBY_VERSION
+    D = Data.define(:aaa, :bbb)
+    def test_data
+      a = D.new("aaa", "bbb")
+      assert_equal("#<data PPTestModule::PPCycleTest::D\n aaa=\"aaa\",\n bbb=\"bbb\">\n", PP.pp(a, ''.dup, 20))
+      assert_equal("#{a.inspect}\n", PP.pp(a, ''.dup))
+    end
+  end
+
   def test_object
     a = Object.new
     a.instance_eval {@a = a}
-- 
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