Changes to `Mash` initialization key string conversion. (#521)

1 files changed, 12 insertions, 1 deletions

diff --git a/lib/hashie/extensions/symbolize_keys.rb b/lib/hashie/extensions/symbolize_keys.rb
index e4315bd..d1da9cb 100644
--- a/lib/hashie/extensions/symbolize_keys.rb
+++ b/lib/hashie/extensions/symbolize_keys.rb
@@ -46,7 +46,7 @@ module Hashie
           hash.extend(Hashie::Extensions::SymbolizeKeys) unless hash.respond_to?(:symbolize_keys!)
           hash.keys.each do |k| # rubocop:disable Performance/HashEachMethods
             symbolize_keys_recursively!(hash[k])
-            hash[k.to_sym] = hash.delete(k)
+            hash[convert_key(k)] = hash.delete(k)
           end
           hash
         end
@@ -61,6 +61,17 @@ module Hashie
             symbolize_keys!(new_hash)
           end
         end
+
+        private
+
+        # Converts a key to a symbol, if possible
+        #
+        # @api private
+        # @param [<K>] key the key to attempt convert to a symbol
+        # @return [Symbol, K]
+        def convert_key(key)
+          key.respond_to?(:to_sym) ? key.to_sym : key
+        end
       end
 
       class << self