Hi E-shih:

you solve the problem of expressing your log format as an LL(1)
language. Eventually, Demeter/Java will support LL(k) like
JCC which will make it easier.

However, Demeter/Java works best when you have control over the language.

	From E-SHIH_CHANE@HP-Vancouver-om10.om.hp.com Fri Mar  7 18:18:01 1997
	Subject: Questions about writing class dictionary on demeter/java
	Mime-Version: 1.0
	To: lieber@ccs.neu.edu, kedar@ccs.neu.edu
	     
	     Hi Karl and Kedar,
	     
	     While I am writing class dictionary to specify my log file record, I 
	     encoutered following questions:
	     
	     1. I can't use label "<to>" 
	        --> example: ProcId_rd = <from> ProcId <to> ProcId.
You cannot use any reserved word of the Demeter/Java design language:
to, before, after etc.
	     2. "//" comments can only be used at beginning of the program.cd file
	   
I can use comments anywhere (Java style). Please send me a specific cd. 
	     3. How do I definite a end of line. such as EOL = "\n". --> don't work
	        ---> example:  message = LIST( String ) EOL.
	     
	     4. The parse can not handle leading zero if the integer is at 
	     beginning of the line.
You seem to have found a wrinkle. It is being investigated.

	       ---> example:
	        class dictionary =>  ProcId = <id> Integer.
	                             ProcId_rd = <from> ProcId "/" <dest> ProcId.
	     
	        data input => 084/00000070
	        will have following error message:
	                parse error at line 1 , column 2. Encountered: 
	                        "84"
	     
	                Was expecting:
	                        "/" ...
	     
	        if change input data to 84/00000070 it work!
	     
	     
	     5. How can I specify a message is a sequence of string without put `"` 
	     around the string?
You would have to write a little cd expressing the structure of the messages.	     
If you don't know the structure of the message, this is a situation where
you would like to slightly change the language, as you did.

	     ---> example:
	     working data input ==> 
	     84/70  13883.273  VCOM: ---> DllMain: "Proc_Att: Win=95, mod = HPVCOM"
	     
	     not working data input ==> 
	     084/070  13883.273  VCOM: ---> DllMain: Proc_Att: Win=95, mod = HPVCOM
	     -----    --------   ------------------- ------------------------------
	      |_________|_______________|_____________|________-> ProcId_rd
	                |_______________|_____________|________-> Time_rd
	                                |_____________|________-> Module_rd
	                                              |________-> Message_rd
	     class dictionary:
	     
	     Log_file = <record> List(Log_rd) *EOF*.
	     
	     Log_rd = <pid> ProcId_rd <timestamp> Time_rd <module_name> Module_rd 
	     <message> Message_rd.
	     
	     ProcId = <id> Integer.
	     ProcId_rd = <from> ProcId "/" <dest> ProcId.
	     
	     Time_rd = <time> Float.
	     
	     Module_name = <name> Ident ":".
	     Module_rd = <dll_name> Module_name "--->" <module_name> Module_name.
	     
	     Message_rd = <msg> List(String).
	     
	     List(S) ~ {S}.
	     
	     
	     
	     Please advise me how to handle these issues, Thank you very much!
	     
	     E-Shih

-- Karl