2001-02-13 12:32:01 +00:00
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<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta http-equiv="Content-Language" content="en-us">
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<title>JJTree Task</title>
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</head>
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<body>
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<h2>
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<a NAME="jjtree"></a>JJTree</h2>
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<h3>
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Description</h3>
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2003-07-23 14:12:12 +00:00
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<p>Invokes the <a href="http://javacc.dev.java.net/">JJTree</a> preprocessor
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2001-02-13 12:32:01 +00:00
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for the JavaCC compiler compiler. It inserts parse tree building actions
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at various places in the JavaCC source that it generates. The output of
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JJTree is run through JavaCC to create the parser.
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<p>To use the jjtree task, set the <i>target</i> attribute to the name
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of the JJTree grammar file to process. You also need to specify the directory
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containing the JavaCC installation using the <i>javacchome</i> attribute,
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so that ant can find the JavaCC classes. Optionally, you can also set the
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<i>outputdirectory</i>
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to write the generated JavaCC grammar and node files to a specific directory.
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Otherwise jjtree writes the generated JavaCC grammar and node files to the directory
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containing the JJTree grammar file. As an extra option, you can also set the
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<i>outputfile</i> to write the generated JavaCC grammar file to a specific (directory and) file.
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Otherwise jjtree writes the generated JavaCC grammar file as the JJTree
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grammar file with a suffix .jj.</p>
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2001-02-13 12:32:01 +00:00
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<p>This task only invokes JJTree if the grammar file is newer than the
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generated JavaCC file.</p>
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<h3>Parameters</h3>
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<table BORDER CELLSPACING=0 CELLPADDING=2 >
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<tr>
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<td VALIGN=TOP><b>Attribute</b></td>
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<td VALIGN=TOP><b>Description</b></td>
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<td ALIGN=CENTER VALIGN=TOP><b>Required</b></td>
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</tr>
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<tr>
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<td VALIGN=TOP>target</td>
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<td VALIGN=TOP>The jjtree grammar file to process.</td>
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<td ALIGN=CENTER VALIGN=TOP>Yes</td>
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</tr>
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<tr>
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<td VALIGN=TOP>javacchome</td>
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<td VALIGN=TOP>The directory containing the JavaCC distribution.</td>
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<td ALIGN=CENTER VALIGN=TOP>Yes</td>
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</tr>
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<tr>
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<td VALIGN=TOP>outputdirectory</td>
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<td VALIGN=TOP>The directory to write the generated JavaCC grammar and node files to.
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If not set, the files are written to the directory containing the grammar file. </td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>outputfile</td>
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<td VALIGN=TOP>The file to write the generated JavaCC grammar file
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to. If not set, the file is written with the same name as the JJTree
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grammar file but with a the suffix <code>.jj</code>. This is a
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filename relative to <em>outputdirectory</em> if specified, the
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project's basedir.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>buildnodefiles</td>
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<td VALIGN=TOP>Sets the BUILD_NODE_FILES grammar option. This is a boolean
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option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>multi</td>
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<td VALIGN=TOP>Sets the MULTI grammar option. This is a boolean option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>nodedefaultvoid</td>
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<td VALIGN=TOP>Sets the NODE_DEFAULT_VOID grammar option. This is a boolean
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option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>nodefactory</td>
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<td VALIGN=TOP>Sets the NODE_FACTORY grammar option. This is boolean option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>nodescopehook</td>
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<td VALIGN=TOP>Sets the NODE_SCOPE_HOOK grammar option. This is a boolean
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option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>nodeusesparser</td>
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<td VALIGN=TOP>Sets the NODE_USES_PARSER grammar option. This is a boolean
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option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>static</td>
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<td VALIGN=TOP>Sets the STATIC grammar option. This is a boolean option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>visitor</td>
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<td VALIGN=TOP>Sets the VISITOR grammar option. This is a boolean option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>nodepackage</td>
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<td VALIGN=TOP>Sets the NODE_PACKAGE grammar option. This is a string option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>visitorexception</td>
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<td VALIGN=TOP>Sets the VISITOR_EXCEPTION grammar option. This is a string
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option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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<tr>
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<td VALIGN=TOP>nodeprefix</td>
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<td VALIGN=TOP>Sets the NODE_PREFIX grammar option. This is a string option.</td>
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<td ALIGN=CENTER VALIGN=TOP>No</td>
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</tr>
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</table>
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<h3>
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Example</h3>
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<blockquote>
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<pre><jjtree
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target="src/Parser.jjt"
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outputdirectory="build/src"
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javacchome="c:/program files/JavaCC"
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nodeusesparser="true"
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/></pre>
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</blockquote>
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This invokes JJTree on grammar file src/Parser.jjt, writing the generated
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grammar file, Parser.jj, file to build/src. The grammar option NODE_USES_PARSER
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is set to true when invoking JJTree.
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<br>
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<hr>
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2003-07-23 14:12:12 +00:00
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<p align="center">Copyright © 2001-2003 Apache Software Foundation. All rights
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Reserved.</p>
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2001-02-13 12:32:01 +00:00
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</body>
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</html>
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