Add Range.reverse_each

README.md

@@ -111,6 +111,10 @@ itself, JRuby and Rubinius.
 
 - `named_captures` (with `symbolize_keys` option)
 
+#### Range
+
+- `reverse_each` (with correct handling of endless Ranges)
+
 ## Ruby 3.2 backports
 
 #### Class

lib/backports/3.3.0/range/reverse_each.rb

@@ -0,0 +1,20 @@
+unless (Range.new(nil, 3) rescue [:ok]).reverse_each.first
+  require 'backports/tools/alias_method_chain'
+
+  class Range
+    def reverse_each_with_endless_handling(&block)
+      case self.end
+      when nil
+        raise "Hey"
+      when Float::INFINITY
+        raise "Hey"
+      when Integer
+        delta = exclusive? ? 1 : 0
+        ((self.end - delta)..(self.begin)).each(&block)
+      else
+        reverse_each_without_endless_handling(&block)
+      end
+    end
+    Backports.alias_method_chain self, :reverse_each, :endless_handling
+  end
+end