lib/configurable/delegate.rb in configurable-0.3.0 vs lib/configurable/delegate.rb in configurable-0.4.0

@@ -25,12 +25,11 @@
     # An hash of metadata for self, used to present the 
     # delegate in different contexts (ex on the command
     # line, in a web form, or a desktop app).
     attr_reader :attributes
 
-    # Initializes a new Delegate with the specified key 
-    # and default value.
+    # Initializes a new Delegate with the specified key and default value.
     def initialize(reader, writer="#{reader}=", default=nil, attributes={})
       self.default = default
       self.reader = reader
       self.writer = writer
   
@@ -59,19 +58,19 @@
     # (see Delegate.duplicable_value?)
     def default(duplicate=true)
       duplicate && @duplicable ? @default.dup : @default
     end
 
-    # Sets the reader for self.  The reader is symbolized,
-    # but may also be set to nil.
+    # Sets the reader for self.
     def reader=(value)
-      @reader = value == nil ? value : value.to_sym
+      raise ArgumentError, "reader may not be nil" if value == nil
+      @reader = value.to_sym
     end
 
-    # Sets the writer for self.  The writer is symbolized,
-    # but may also be set to nil.
+    # Sets the writer for self.
     def writer=(value)
-      @writer = value == nil ? value : value.to_sym
+      raise ArgumentError, "writer may not be nil" if value == nil
+      @writer = value.to_sym
     end
     
     # Returns true if the default value is a kind of DelegateHash.
     def is_nest?
       @default.kind_of?(DelegateHash)
\ No newline at end of file