* ext/psych/lib/psych/visitors/visitor.rb (accept): switch to

  a dispatch cache rather than case / when statement.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29670 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 10 deletions

diff --git a/ext/psych/lib/psych/visitors/visitor.rb b/ext/psych/lib/psych/visitors/visitor.rb
index 3471c43dfa..0e33128f01 100644
--- a/ext/psych/lib/psych/visitors/visitor.rb
+++ b/ext/psych/lib/psych/visitors/visitor.rb
@@ -11,16 +11,17 @@ module Psych
       end
 
       def accept target
-        case target
-        when Psych::Nodes::Scalar   then visit_Psych_Nodes_Scalar target
-        when Psych::Nodes::Mapping  then visit_Psych_Nodes_Mapping target
-        when Psych::Nodes::Sequence then visit_Psych_Nodes_Sequence target
-        when Psych::Nodes::Alias    then visit_Psych_Nodes_Alias target
-        when Psych::Nodes::Document then visit_Psych_Nodes_Document target
-        when Psych::Nodes::Stream   then visit_Psych_Nodes_Stream target
-        else
-          raise "Can't handle #{target}"
-        end
+        visit target
+      end
+
+      private
+
+      DISPATCH = Hash.new do |hash, klass|
+        hash[klass] = "visit_#{klass.name.gsub('::', '_')}"
+      end
+
+      def visit target
+        send DISPATCH[target.class], target
       end
     end
   end