Taken from /org/antlr/tool/Grammar.java all allowed options are
option |
description |
---|---|
language |
the default is language=Java; over time new code generation target will be completed and can then be set here |
tokenVocab |
where ANTLR should get predefined tokens and token types. Tree grammars need it to get the token types from the parser that creates its trees |
output |
valid values are output=AST; and output=template; |
ASTLabelType |
set the type of all tree labels and tree-valued expressions. Without this option, trees are of type |
TokenLabelType |
set the type of all token-valued expressions. Without this option, tokens are of type |
superClass |
set the superclass of the generated recognizer |
filter |
In the lexer, this allows you to try a list of lexer rules in order. The first one that matches, wins. This is the token that |
rewrite |
Use this option when your translator output looks very much like the input. Your actions can modify the |
k |
limit the lookahead depth for the recognizer uses most k symbols. this prevents the decision from using acyclic LL DFA. |
backtrack |
taken from http://www.antlr.org:8080/pipermail/antlr-interest/2006-July/016818.html : The new feature (a big one) is the backtrack=true option for grammar, rule, block that let's you type in any old crap and ANTLR will backtrack if it can't figure out what you meant. No errors are reported by antlr during analysis. It implicitly adds a syn pred in front of every production, using them only if static grammar LL( * ) analysis fails. Syn pred code is not generated if the pred is not used in a decision. This is essentially a rapid prototyping mode. It is what I have used on the java.g. Oh, it doesn't memoize partial parses (i.e., rule parsing results) during backtracking automatically now. You must also say memoize=true. Can make a HUGE difference to turn on. |
memoize |
When backtracking, remember whether or not rule references succeed so that the same input position cannot be parsed more than once by the same rule. This effectively guarantees linear parsing when backtracking at the cost of more memory. |