template.rb in asciidoctor-2.0.8

- old
+ new

@@ -32,12 +32,12 @@
     haml: { format: :xhtml, attr_wrapper: '"', escape_attrs: false, ugly: true },
     slim: { disable_escape: true, sort_attrs: false, pretty: false },
   }
 
   begin
-    require 'concurrent/hash' unless defined? ::Concurrent::Hash
-    @caches = { scans: ::Concurrent::Hash.new, templates: ::Concurrent::Hash.new }
+    require 'concurrent/map' unless defined? ::Concurrent::Map
+    @caches = { scans: ::Concurrent::Map.new, templates: ::Concurrent::Map.new }
   rescue ::LoadError
     @caches = { scans: {}, templates: {} }
   end
 
   def self.caches
@@ -69,10 +69,10 @@
         (@engine_options[engine] ||= {}).update override_opts
       end
     end
     case opts[:template_cache]
     when true
-      logger.warn 'optional gem \'concurrent-ruby\' is not available. This gem is recommended when using the default template cache.' unless defined? ::Concurrent::Hash
+      logger.warn 'optional gem \'concurrent-ruby\' is not available. This gem is recommended when using the default template cache.' unless defined? ::Concurrent::Map
       @caches = self.class.caches
     when ::Hash
       @caches = opts[:template_cache]
     else
       @caches = {} # the empty Hash effectively disables caching