digital_simulator/Keyword.py

   1 # vim: set fileencoding=utf8
   2 #  Keyword.py
   3 #
   4 # A keyword is a reserved word used by the language.
   5 #
   6
   7 keywords = ("entity", "is", "port", "in", "out", "trit", "end", "inout",
   8                 "downto", "architecture", "dataflow", "of", "is", "begin",
   9                  "end", "dataflow" )
  10
  11 class Keyword(object):
  12     def __init__(self, name):
  13         '''Initialize Keyword object.  '''
  14
  15         assert name in keywords
  16         self.name = name
  17
  18     def __str__(self):
  19         return "<Keyword:%s>" % (self.name,)
  20
  21 if __name__ == "__main__":
  22     a = Keyword("entity")
  23     b = Keyword("port")
  24     c = Keyword("architecture")
  25     d = Keyword("inout")
  26
  27     print a, b, c, d