[antlr-interest] Parsing free text

[Bolek Vrany]

Hello,

I'm quite new to ANTLR. Could you please help me with the following task?

How do I create either a lexer or parser rule that would read all text 
starting with WRN or ERR until the end of file to a single token. The 
language is case sensitive. For example

IF color=white AND size=big THEN ERR Not in stock
IF color=white AND size=big THEN WRN [[43:WR12345]]

Both identifiers and the text after WRN or ERR can be arbitrarily long. 
Identifiers can contain 'a'..'z'|'A'..'Z'|'_'|'0'..'9' (numeric literals 
are enclosed in $$, ie. $50.0$). WRN [[43:WR12345]] means look up the 
text of warning [[43:WR12345]] in a database and display it, while the 
first form simply display 'Not in stock'. The message is delimited only 
by ERR and EOF.

I tried several ways to do it, but always ended with an ambiguity, loop 
or a lexer rule eating all the text including IF and the condition to a 
single token.


Thanks a lot

Bolek