lib/nydp/symbol.rb in nydp-0.3.0 vs lib/nydp/symbol.rb in nydp-0.4.0

@@ -1,6 +1,8 @@
 class Nydp::Symbol
+  class Unbound < StandardError ; end
+
   EMPTY = :""
   attr_accessor :name
   attr_reader   :hash
 
   def initialize name
@@ -13,10 +15,10 @@
   def untidy str
     (str == "") || (str == nil) || (str =~ /\s/)
   end
 
   def value context=nil
-    raise Nydp::Error.new("unbound symbol: #{self.inspect}") if @value == nil
+    raise Unbound.new("unbound symbol: #{self.inspect}") if @value == nil
     @value
   end
 
   def self.mk name, ns
     name = name.to_sym