Writing extensions to predict, continued

• usage: _pred_se "options your extension will handle" `0'
• _pred_se returned results:

  s(done)		_pred_se handled a standard case
  s(varn)		name of new variable to generate
  s(typ)		datatype of new variable to generate
  s(rest)		command line for custom predictor to parse

  
  
• Example:

         program define mycmd6_p
             local myopts "new-predict-options"
             _pred_se "`myopts'" `0'
             if `s(done)' { exit }
             local vtyp `s(typ)'
             local varn `s(varn)'
             local 0    `"`s(rest)'"'
             syntax [if] [in] [, `myopts' noOFFset]
             ...
         end
  

• mycmd6_p must handle default case of no options specified
• mycmd6_p also handles cases when one of the options in `myopts' is specified