From 9cc08e1201c29b4addbe65cab87e5989caaa1ea5 Mon Sep 17 00:00:00 2001
From: Mitsuru Hayasaka <hayasaka.mitsuru@gmail.com>
Date: Mon, 30 May 2022 22:25:20 +0900
Subject: [PATCH 1/3] Provide pattern matching for OpenStruct

---
 lib/ostruct.rb               | 29 +++++++++++++++++++++++++++++
 test/ostruct/test_ostruct.rb | 10 ++++++++++
 2 files changed, 39 insertions(+)

diff --git a/lib/ostruct.rb b/lib/ostruct.rb
index a08561d..528ee9c 100644
--- a/lib/ostruct.rb
+++ b/lib/ostruct.rb
@@ -428,6 +428,35 @@ def hash # :nodoc:
     @table.hash
   end
 
+  #
+  # Returns a hash of attributes for the given keys. Provides the pattern
+  # matching interface for matching against hash patterns. For example:
+  #
+  #   require "ostruct"
+  #
+  #   def greeting_for(person)
+  #     case person
+  #     in { name: "Mary" }
+  #       "Welcome back, Mary!"
+  #     in { name: }
+  #       "Welcome stranger!"
+  #     end
+  #   end
+  #
+  #   person = OpenStruct.new(name: "Mary")
+  #   greeting_for(person) # => "Welcome back, Mary!"
+  #
+  #   person = OpenStruct.new
+  #   greeting_for(person) # => "Welcome stranger!"
+  #
+  def deconstruct_keys(keys)
+    deconstructed = {}
+    keys.each do |key|
+      deconstructed[key] = send(key)
+    end
+    deconstructed
+  end
+
   #
   # Provides marshalling support for use by the YAML library.
   #
diff --git a/test/ostruct/test_ostruct.rb b/test/ostruct/test_ostruct.rb
index 256db7a..ec14eb9 100644
--- a/test/ostruct/test_ostruct.rb
+++ b/test/ostruct/test_ostruct.rb
@@ -412,4 +412,14 @@ def test_class
     assert_equal('my-class', os.class)
     assert_equal(OpenStruct, os.class!)
   end
+
+  def test_pattern_matching
+    os = OpenStruct.new(class: 'my-class', method: 'post')
+    case os
+    in { class: 'my-class', method: 'post' }
+      assert true
+    else
+      assert false
+    end
+  end
 end

From a04c6e4ee5db429bce632966145a83c1eea55ee1 Mon Sep 17 00:00:00 2001
From: Mitsuru Hayasaka <hayasaka.mitsuru@gmail.com>
Date: Tue, 31 May 2022 01:13:00 +0900
Subject: [PATCH 2/3] Use public_send

---
 lib/ostruct.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ostruct.rb b/lib/ostruct.rb
index 528ee9c..99f7dc1 100644
--- a/lib/ostruct.rb
+++ b/lib/ostruct.rb
@@ -452,7 +452,7 @@ def hash # :nodoc:
   def deconstruct_keys(keys)
     deconstructed = {}
     keys.each do |key|
-      deconstructed[key] = send(key)
+      deconstructed[key] = public_send(key)
     end
     deconstructed
   end

From 54dbd1df9f9c8756f90f6cb147795834cdefcc3a Mon Sep 17 00:00:00 2001
From: Mitsuru Hayasaka <hayasaka.mitsuru@gmail.com>
Date: Tue, 31 May 2022 01:22:57 +0900
Subject: [PATCH 3/3] Ignore test_pattern_matching if RUBY_VERSION <=  2.6

---
 test/ostruct/test_ostruct.rb | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/test/ostruct/test_ostruct.rb b/test/ostruct/test_ostruct.rb
index ec14eb9..177c9d0 100644
--- a/test/ostruct/test_ostruct.rb
+++ b/test/ostruct/test_ostruct.rb
@@ -415,11 +415,13 @@ def test_class
 
   def test_pattern_matching
     os = OpenStruct.new(class: 'my-class', method: 'post')
-    case os
-    in { class: 'my-class', method: 'post' }
-      assert true
-    else
-      assert false
-    end
-  end
+    instance_eval(<<~RUBY)
+      case os
+      in { class: 'my-class', method: 'post' }
+        assert true
+      else
+        assert false
+      end
+    RUBY
+  end if RUBY_VERSION >= '2.7'
 end