Command line options

Usage:

java org.antlr.Tool [args] file.g [file2.g file3.g ...]

Option	description
-o outputDir	specify output directory where all output is generated; search for token vocabularies in here also
-fo outputDir	same as -o but force even files with relative paths to dir
-depend	generate file dependencies; don't actually run antlr
-lib dir	specify location of token files and important grammars
-report	print out a report about the grammar(s) processed
-print	print out the grammar without actions
-trace	generate a parser with trace output - if the default output is not enough, you can override the traceIn and traceOut methods
-debug	generate a parser that emits debugging events
-profile	generate a parser that computes profiling information
-nfa	generate an NFA for each rule
-dfa	generate a DFA for each decision point
-message-format name	specify output style for messages
-X	display extended option list

There are a bunch of less often used "extended" options as well.

Extended option	description
-Xgrtree	print the grammar AST
-Xdfa	print DFA as text
-Xnoprune	do not test EBNF block exit branches
-Xnocollapse	collapse incident edges into DFA states
-Xdbgconversion	dump lots of info during NFA conversion
-Xmultithreaded	run the analysis in 2 threads
-Xnomergestopstates	do not merge stop states
-Xdfaverbose	generate DFA states in DOT with NFA configs
-Xwatchconversion	print a message for each NFA before converting
-XdbgST	put tags at start/stop of all templates in output
-Xm m	max number of rule invocations during conversion
-Xmaxdfaedges m	max "comfortable" number of edges for single DFA state
-Xconversiontimeout t	set NFA conversion timeout for each decision
-Xmaxinlinedfastates m	max DFA states before table used rather than inlining
-Xnfastates	for nondeterminisms, list NFA states for each path