Allow exporting a normal, not-indifferent Hash

Following the conventions in `activesupport` and the semantics of the
`#to_hash` method in Ruby's standard library, the `#to_hash` method for
a hash that has mixed in `IndifferentAccess` will now export the hash as
a normal, not-indifferent hash.

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/hashie/extensions/indifferent_access.rb b/lib/hashie/extensions/indifferent_access.rb
index ebdb0f9..d6b9da3 100644
--- a/lib/hashie/extensions/indifferent_access.rb
+++ b/lib/hashie/extensions/indifferent_access.rb
@@ -143,6 +143,18 @@ module Hashie
         super.convert!
       end
 
+      def to_hash
+        {}.tap do |result|
+          each_pair { |key, value| result[key] = value }
+
+          if default_proc
+            result.default_proc = default_proc
+          else
+            result.default = default
+          end
+        end
+      end
+
       with_minimum_ruby('2.5.0') do
         def slice(*keys)
           string_keys = keys.map { |key| convert_key(key) }