[antlr-interest] Fundamental question on lexer rule ordering

[John B. Brodie]

Greetings!

>I must be missing something fundamental on lexer rule ordering, because I 
>keep running into the same problem over and over: re-ordering rules 
>changes the lexer from "working" to "failing", and I don't understand why.

Is your Lexer in a separate .g file from your Parser (I seem to
remember seeing an importvocab in one of your earlier parser
postings)?

If so, are you sure you are re-building the Parser after each change
to the Lexer. Re-ordering the Lexer rules will change the Token Types
assigned by the Lexer and thus the Parser needs to be rebuilt in order
to adapt to those new assignments.


Hope this helps...
   -jbb