WIP

Author: byroot

lib/json/truffle_ruby/generator.rb

@@ -290,6 +290,10 @@ def configure(opts)
         end
         alias merge configure
 
+        def allow_duplicate_key? # :nodoc:
+          @allow_duplicate_key
+        end
+
         # Returns the configuration instance variables as a hash, that can be
         # passed to the configure method.
         def to_h
@@ -491,9 +495,18 @@ def json_transform(state)
             delim = ",#{state.object_nl}"
             result = +"{#{state.object_nl}"
             first = true
+            key_type = nil
             indent = !state.object_nl.empty?
             each { |key, value|
-              result << delim unless first
+              if first
+                key_type = key.class
+              else
+                if key_type && !state.allow_duplicate_key? && key_type != key.class
+                  key_type = nil # stop checking
+                  JSON.send(:on_mixed_keys_hash, self, state.allow_duplicate_key? == false)
+                end
+                result << delim
+              end
               result << state.indent * depth if indent
 
               if state.strict? && !(Symbol === key || String === key)