122 lines
2.9 KiB
Plaintext
122 lines
2.9 KiB
Plaintext
ANTLR v4
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Terence Parr, parrt@cs.usfca.edu
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ANTLR project lead and supreme dictator for life
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University of San Francisco
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INTRODUCTION
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Hi and welcome to the Honey Badger 4.1 release of ANTLR!
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INSTALLATION
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UNIX
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0. Install Java (version 1.6 or higher)
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1. Download
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$ cd /usr/local/lib
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$ curl -O http://www.antlr4.org/download/antlr-4.1-complete.jar
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Or just download in browser using URL:
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http://www.antlr4.org/download/antlr-4.1-complete.jar
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and put it somewhere rational like /usr/local/lib.
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2. Add antlr-4.1-complete.jar to your CLASSPATH:
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$ export CLASSPATH=".:/usr/local/lib/antlr-4.1-complete.jar:$CLASSPATH"
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Is also a good idea to put this in your .bash_profile or whatever your
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startup script is.
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3. Create aliases for the ANTLR Tool, and TestRig.
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$ alias antlr4='java -jar /usr/local/lib/antlr-4.1-complete.jar'
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$ alias grun='java org.antlr.v4.runtime.misc.TestRig'
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WINDOWS (Thanks to Graham Wideman)
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0. Install Java (version 1.6 or higher)
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1. Download http://antlr.org/download/antlr-4.1-complete.jar
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Save to your directory for 3rd party Java libraries, say C:\Javalib
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2. Add antlr-4.1-complete.jar to CLASSPATH, either:
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* Permanently: Using System Properties dialog > Environment variables >
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Create or append to CLASSPATH variable
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* Temporarily, at command line:
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SET CLASSPATH=C:\Javalib\antlr-4.1-complete.jar;%CLASSPATH%
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3. Create short convenient commands for the ANTLR Tool, and TestRig,
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using batch files or doskey commands:
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* Batch files (in directory in system PATH)
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antlr4.bat: java org.antlr.v4.Tool %*
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run.bat: java org.antlr.v4.runtime.misc.TestRig %*
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* Or, use doskey commands:
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doskey antlr4=java org.antlr.v4.Tool $*
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doskey grun =java org.antlr.v4.runtime.misc.TestRig $*
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TESTING INSTALLATION
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Either launch org.antlr.v4.Tool directly:
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$ java org.antlr.v4.Tool
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ANTLR Parser Generator Version 4.1
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-o ___ specify output directory where all output is generated
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-lib ___ specify location of .tokens files
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...
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or use -jar option on java:
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$ java -jar /usr/local/lib/antlr-4.1-complete.jar
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ANTLR Parser Generator Version 4.1
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-o ___ specify output directory where all output is generated
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-lib ___ specify location of .tokens files
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...
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EXAMPLE
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In a temporary directory, put the following grammar inside file Hello.g4:
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// Define a grammar called Hello
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// match keyword hello followed by an identifier
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// match lower-case identifiers
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grammar Hello;
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r : 'hello' ID ;
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ID : [a-z]+ ;
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WS : [ \t\n]+ -> skip ; // skip spaces, tabs, newlines
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Then run ANTLR the tool on it:
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$ cd /tmp
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$ antlr4 Hello.g4
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$ javac Hello*.java
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Now test it:
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$ grun Hello r -tree
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hello parrt
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^D
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(r hello parrt)
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(That ^D means EOF on unix; it's ^Z in Windows.) The -tree option prints
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the parse tree in LISP notation.
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BOOK SOURCE CODE
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http://pragprog.com/titles/tpantlr2/source_code
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GRAMMARS
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https://github.com/antlr/grammars-v4
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