rename string to word

lib/parfait.rb

@@ -4,7 +4,7 @@ require "parfait/module"
 require "parfait/class"
 require "parfait/dictionary"
 require "parfait/list"
-require "parfait/string"
+require "parfait/word"
 require "parfait/message"
 require "parfait/frame"
 require "parfait/space"

lib/parfait/string.rb

@@ -1,6 +0,0 @@
-
-
-module Parfait
-  class String < Object
-  end
-end

lib/parfait/word.rb

@@ -0,0 +1,12 @@
+
+
+module Parfait
+  # A word is a a short sequence of characters
+  # Characters are not modeled as objects but as (small) integers
+  # The small means two of them have to fit into a machine word, iw utf16 or similar
+  #
+  # Words are constant, maybe like js strings, ruby symbols
+  # Words are short, but may have spaces
+  class Word < Object
+  end
+end

lib/virtual/object.rb

@@ -7,7 +7,8 @@ module Positioned
     @position
   end
   def set_position pos
-    # resetting of position used to be error, but since relink and dynamic instruction size it is ok. in measures
+    # resetting of position used to be error, but since relink and dynamic instruction size it is ok.
+    # in measures (of 32)
     if @position != nil and ((@position - pos).abs > 32)
       raise "position set again #{pos}!=#{@position} for #{self}"
     end
@@ -125,7 +126,7 @@ end
     Virtual::Object.new.padded_words(length())
   end
 end
-::Parfait::String.class_eval do
+::Parfait::Word.class_eval do
   include Positioned
   def layout
     Virtual::Object.layout