On Apr 14, 2009, at 1:45 PM, ian eyberg wrote: > Hi, > > I have some text that looks like this: > > sally sue slaps userX with a big fish > userX: I like to chat and take up one line > and then I like to continue onto a second line > joe blow sneezes > joe blow blows his nose > > There are three different users here: > sally sue, joe blow, userX > > I have no problems with the various actions/commands > that the users do because they do not change > (slaps userX with a big fish, sneezes, blows his nose) > > -- however, whenever one of them decides to chat all > hell breaks loose.. I usually have to rewrite some tokens > as parser rules.. not a huge problem -- just a pain.. > > anyway, multi-line chats are my big problem here as > my chatrule, as for now, accepts mostly anything EXCEPT > a newline character cause it uses that as the end part of > the rule > > my question to you all is what would you do? as you can tell > I don't have quotes or any other bounding type of characters.. > the best thing I can think of is to see if my next token would > be a username or one of my other tokens that would come at the > start of a newline > > I've attached my test rig and simple grammar > > Much appreciation in advance,
I'll warn that I haven't looked at the attached files, but I can imagine all hell breaking loose with input like this: sally sue slaps userX with a big fish userX: I really like seeing when it says sally sue slaps userX with a big fish sally sue slaps userX with a big fish It's completely ambiguous what the last two lines really are. We might interpret that the first one is a comment and that the second is information, but there's nothing in the grammar to clarify the uncertainty. Instead of looking for a newline character at the end, you could try looking for a token at the beginning. For example: ">>" As long as the token is something that isn't _allowed_ in user input, you'll be fine. > > > -- > ian eyberg > <Chat.g><GTest.java> > List: http://www.antlr.org/mailman/listinfo/antlr-interest > Unsubscribe: > http://www.antlr.org/mailman/options/antlr-interest/your-email-address ------------------------------- Hank Schultz Cedrus Corporation http://www.cedrus.com/ List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en -~----------~----~----~----~------~----~------~--~---
