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This project forked from antlr/antlr4
License: Other
ANTLR v4 Terence Parr, parrt at cs usfca edu ANTLR project lead and supreme dictator for life University of San Francisco INTRODUCTION Hi and welcome to the Honey Badger 4.0 release of ANTLR! INSTALLATION $ cd /usr/local/lib $ curl -O --silent http://www.antlr.org/download/antlr-4.0-complete.jar Or just download from http://www.antlr.org/download/antlr-4.0-complete.jar and put it somewhere rational for your operating system. You can either add to your CLASSPATH: $ export CLASSPATH=".:/usr/local/lib/antlr-4.0-complete.jar:$CLASSPATH" and launch org.antlr.v4.Tool directly: $ java org.antlr.v4.Tool ANTLR Parser Generator Version 4.0 -o ___ specify output directory where all output is generated -lib ___ specify location of .tokens files ... or use -jar option on java: $ java -jar /usr/local/lib/antlr-4.0-complete.jar ANTLR Parser Generator Version 4.0 -o ___ specify output directory where all output is generated -lib ___ specify location of .tokens files ... You can make a script, /usr/local/bin/antlr4: #!/bin/sh java -cp "/usr/local/lib/antlr4-complete.jar:$CLASSPATH" org.antlr.v4.Tool $* On Windows, you can do something like this (assuming you put the jar in C:\libraries) for antlr4.bat: java -cp C:\libraries\antlr-4.0-complete.jar;%CLASSPATH% org.antlr.v4.Tool %* You can also use an alias $ alias antlr4='java -jar /usr/local/lib/antlr-4.0-complete.jar' Either way, say just antlr4 to run ANTLR now. The TestRig class is very useful for testing your grammars: $ alias grun='java org.antlr.v4.runtime.misc.TestRig' EXAMPLE In /tmp/Hello.g4, paste this: // Define a grammar called Hello // match keyword hello followed by an identifier // match lower-case identifiers grammar Hello; r : 'hello' ID ; ID : [a-z]+ ; WS : [ \t\n]+ -> skip ; // skip spaces, tabs, newlines Then run ANTLR the tool on it: $ cd /tmp $ antlr4 Hello.g4 $ javac Hello*.java Now test it: $ grun Hello r -tree hello parrt ^D (r hello parrt) (That ^D means EOF on unix; it's ^Z in Windows.) The -tree option prints the parse tree in LISP notation. BOOK SOURCE CODE http://pragprog.com/titles/tpantlr2/source_code
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