Provided by: antlr4_4.7.2-5_all 
NAME
ANTLR - ANother Tool for Language Recognition, version 4
SYNOPSIS
antlr4 [options] file.g4 [ file2.g4 file3.g4 ...]
DESCRIPTION
ANTLR (ANother Tool for Language Recognition) is a parser generator for reading, processing, executing,
or translating structured text or binary files. It's widely used to build languages, tools, and
frameworks. From a grammar, ANTLR generates a parser that can build and walk parse trees.
OPTIONS
-o outdir
Specify output directory where all output is generated.
ANTLR generates output files in the current directory by default. This option specifies the output
directory where ANTLR should generate parsers, listeners, visitors, and tokens files.
-lib dir
Specify location of grammars, tokens files.
When looking for tokens files and imported grammars, ANTLR normally looks in the current
directory. This option specifies which directory to look in instead. It is only used for
resolving grammar references for the import statement and the tokenVocab option. The path to the
primary grammar must always be fully specified.
-atn Generate rule augmented transition network diagrams.
This option generates DOT graph files that represent the internal ATN (augmented transition
network) data structures that ANTLR uses to represent grammars. The files come out as Grammar.rule
.dot. If the grammar is a combined grammar, the lexer rules are named Grammar Lexer.rule .dot.
-encoding encodingname
Specify grammar file encoding; e.g., euc-jp.
By default ANTLR loads grammar files using the UTF-8 encoding, which is a very common character
file encoding that degenerates to ASCII for characters that fit in one byte. If that grammar file
is not the default encoding for your locale, you need this option so that ANTLR can properly
interpret grammar files. This does not affect the input to the generated parsers, just the
encoding of the grammars themselves.
-message-format format
Specify output style for messages in antlr, gnu, vs2005.
ANTLR generates warning and error messages using templates from directory
tool/resources/org/antlr/v4/tool/templates/messages/formats. By default, ANTLR uses the antlr.stg
(StringTemplate group) file. You can change this to 'gnu' or 'vs2005' to have ANTLR generate
messages appropriate for Emacs or Visual Studio. To make your own called X, create resource
org/antlr/v4/tool/templates/messages/formats/X and place it in the CLASSPATH.
-long-messages
Show exception details when available for errors and warnings.
-listener
Generate parse tree listener (default).
-no-listener
Don't generate parse tree listener.
-visitor
Generate parse tree visitor.
ANTLR can generate both parse tree listeners and visitors; this option and -listener aren’t
mutually exclusive.
-no-visitor
Don't generate parse tree visitor (default).
-package packagename
Specify a package/namespace for the generated code.
Use this option to specify a package or namespace for ANTLR-generated files. Alternatively, you
can add a @header {...} action but that ties the grammar to a specific language. If you use this
option and @header, make sure that the header action does not contain a package specification
otherwise the generated code will have two of them.
-depend
Generate file dependencies.
Instead of generating a parser and/or lexer, generate a list of file dependencies, one per line.
The output shows what each grammar depends on and what it generates. This is useful for build
tools that need to know ANTLR grammar dependencies.
If you use -lib libdir with -depend and grammar option tokenVocab=A, then the dependencies include
the library path as well.
-Xforce-atn use the ATN simulator for all predictions
-Xlog dump lots of logging info to antlr-timestamp.log
-D<option>=<value>
Set or override a grammar-level option.
This option is useful for generating parsers in different languages without altering the grammar
itself (with --Dlanguage=CSharp for example).
-Werror
Treat warnings as errors.
As part of a large build, ANTLR warning messages could go unnoticed. Turn on this option to have
warnings treated as errors, causing the ANTLR tool to report failure back to the invoking
commandline shell.
-XdbgST
Launch StringTemplate visualizer on generated code.
For those building a code generation target, this option brings up a window showing the generated
code and the templates used to generate that code. It invokes the StringTemplate inspector
window.
-XdbgSTWait
Wait for STViz to close before continuing.
-Xforce-atn
Use the ATN simulator for all predictions.
ANTLR normally builds traditional “switch on token type” decisions where possible (one token of
lookahead is sufficient to distinguish between all alternatives in a decision). To force even
these simple decisions into the adaptive LL(*) mechanism, use this option.
-Xlog Dump lots of logging info to antlr-timestamp.log.
This option creates a log file containing lots of information messages from ANTLR as it processes
your grammar. If you would like to see how ANTLR translates your left-recursive rules, turn on
this option and look in the resulting log file.
SEE ALSO
http://www.antlr4.org
ANTLR(1)