demonstrative_determiner.rb in zenlish-0.2.05

- old
+ new
@@ -1,9 +1,46 @@
 require_relative 'determiner'
+require_relative '../inflect/inflection_table_builder'
 
 module Zenlish
   module WClasses
-    # TODO: document
+    # In grammar, a demonstrative is a determiner or a pronoun
+    # that points to a particular noun or to the noun it replaces (the antecedent).
     class DemonstrativeDeterminer < Determiner
+      def initialize
+        super()
+        init_feature_defs
+        init_paradigms
+      end    
+
+      # @return [FalseClass] Indicates that demonstrative determiners inflects.
+      def invariable?
+        false
+      end
+
+      private
+
+      def init_feature_defs
+        # Create standard feature definitions for irregular verbs.
+        feature_def_dsl {
+          feature_def 'NUMBER' => enumeration(:singular, :plural)
+          feature_def 'DISTANCE' => enumeration(:near, :far)
+          feature_def 'PARADIGM' => [identifier, 'Demonstrative_det_paradigm'] # 2nd item is default value
+        }
+      end
+
+      def init_paradigms
+        builder = Inflect::InflectionTableBuilder.new
+        table = builder.build('Demonstrative_det_paradigm') do
+          feature_heading 'NUMBER'
+          feature_heading 'DISTANCE'
+          #     NUMBER             DISTANCE
+          rule([equals(:singular), equals(:near)],  func('base_form'))
+          rule([equals(:singular), equals(:far)],   literal('that'))
+          rule([equals(:plural),   equals(:near)],  literal('these'))
+          rule([equals(:plural),   equals(:far), ], literal('those'))
+        end
+        add_paradigm(table)
+      end
     end # class
   end # module
 end # module