lib/zenlish/lex/lexicon.rb in zenlish-0.1.23 vs lib/zenlish/lex/lexicon.rb in zenlish-0.1.24

@@ -17,10 +17,11 @@
         @lemma2entry = {}
         @terminals = []
         @name2terminal = {}
       end
 
+      # @param aLemma[String] retrieve the lexeme form the given "head word".
       def get_lexeme(aLemma, aWordClass = nil)
         if aWordClass
           lexeme = nil
           candidate = nil
 
@@ -36,10 +37,15 @@
             lexeme = candidate if candidate.wclass.kind_of?(aWordClass)
           end
 
           lexeme
         else
-          lemma2entry.fetch(aLemma).lexemes.first
+          begin
+            lemma2entry.fetch(aLemma).lexemes.first
+          rescue NoMethodError => exc
+            $stderr.puts "Multiple lexemes for #{aLemma}"
+            raise exc
+          end
         end
       end
 
       def add_terminal(aTerminal)
         terminals << aTerminal