[antlr-interest] Request option to check for undefined tokens in tree grammar, Antlr 3.0
Stephen_Hardy at rabbit.com
Wed Aug 1 13:14:33 PDT 2007
I made a typo in my tree grammar where a token was misspelt.
Unfortunately, ANTLR happily added that never-to-be-used token to the
list, so no error was flagged and it took a little time to track down
Would it be possible to add an option to a tree grammar to make Antlr
issue a warning if tokens were defined but not defined in the *.tokens
file? I would recommend enabling the warning by default, since most
users (I think) would not want to define additional tokens in the tree
grammar which weren't in the parser grammar.
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