Add Psych::Handler#event_location

This adds a new reported event to Psych::Handler, event_location, with precise start/end line/column information.

The line/column information provided by Psych::Parser#mark is not very useful because it points to the location past the event.

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/psych/handler.rb b/lib/psych/handler.rb
index 1074c18..84a3b4f 100644
--- a/lib/psych/handler.rb
+++ b/lib/psych/handler.rb
@@ -242,6 +242,11 @@ module Psych
     end
 
     ###
+    # Called before each event with line/column information.
+    def event_location(start_line, start_column, end_line, end_column)
+    end
+
+    ###
     # Is this handler a streaming handler?
     def streaming?
       false