docstr: Set cname and value attributes.
docstr_tok: ["Set","cname","and","value","attributes","."]
code: def parse_line(self, existing_constants):
      """Set cname and value attributes."""
      value = None
      line = self.line.split("/*", 1)[0]
      args = getwords(line)[1:]
      self.isvalid = False
      if len(args) == 1:
          pass
      elif len(args) == 2:
          # Set name
          name, val = args
          self.isvalid = bool(name)
          self._set_name(name)
          value = self._set_value_from_string(val, existing_constants)
      elif "=" in args:
          name, val = args[-3], args[-1]
          self.isvalid = bool(name)
          self._set_name(name)
          value = self._set_value_from_string(val, existing_constants)
      else:
          print('Dont know what to do with "%s"' % line)
  
      # For when this constant is reused to set another constant
      if value is not None:
          existing_constants[self.oname] = value
      self.value = value
  
imports: import os
label_desc: Use image node_id 2 for calling the ConstantDefinition obj's underlying member method code with example usage: obj.parse_line(existing_constants) without return types