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| <title>JJTree Task</title> |
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| <body> |
| |
| <h2> |
| <a NAME="jjtree"></a>JJTree</h2> |
| |
| <h3> |
| Description</h3> |
| Invokes the <a href="http://www.webgain.com/products/java_cc/">JJTree</a> preprocessor |
| for the JavaCC compiler compiler. It inserts parse tree building actions |
| at various places in the JavaCC source that it generates. The output of |
| JJTree is run through JavaCC to create the parser. |
| <p>To use the jjtree task, set the <i>target</i> attribute to the name |
| of the jjtree grammar file to process. You also need to specify the directory |
| containing the JavaCC installation using the <i>javacchome</i> attribute, |
| so that ant can find the JavaCC classes. Optionally, you can also set the |
| <i>outputdirectory</i> |
| to write the generated file to a specific directory. Otherwise jjtree writes |
| the generated JavaCC grammar file to the directory containing the JJTree |
| grammar file.</p> |
| <p>This task only invokes JJTree if the grammar file is newer than the |
| generated JavaCC file.</p> |
| |
| <h3>Parameters</h3> |
| |
| <table BORDER CELLSPACING=0 CELLPADDING=2 > |
| <tr> |
| <td VALIGN=TOP><b>Attribute</b></td> |
| |
| <td VALIGN=TOP><b>Description</b></td> |
| |
| <td ALIGN=CENTER VALIGN=TOP><b>Required</b></td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>target</td> |
| |
| <td VALIGN=TOP>The jjtree grammar file to process.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>Yes</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>javacchome</td> |
| |
| <td VALIGN=TOP>The directory containing the JavaCC distribution.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>Yes</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>outputdirectory</td> |
| |
| <td VALIGN=TOP>The directory to write the generated file to. If not set, |
| the files are written to the directory containing the grammar file. </td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>buildnodefiles</td> |
| |
| <td VALIGN=TOP>Sets the BUILD_NODE_FILES grammar option. This is a boolean |
| option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>multi</td> |
| |
| <td VALIGN=TOP>Sets the MULTI grammar option. This is a boolean option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>nodedefaultvoid</td> |
| |
| <td VALIGN=TOP>Sets the NODE_DEFAULT_VOID grammar option. This is a boolean |
| option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>nodefactory</td> |
| |
| <td VALIGN=TOP>Sets the NODE_FACTORY grammar option. This is boolean option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>nodescopehook</td> |
| |
| <td VALIGN=TOP>Sets the NODE_SCOPE_HOOK grammar option. This is a boolean |
| option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>nodeusesparser</td> |
| |
| <td VALIGN=TOP>Sets the NODE_USES_PARSER grammar option. This is a boolean |
| option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>static</td> |
| |
| <td VALIGN=TOP>Sets the STATIC grammar option. This is a boolean option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>visitor</td> |
| |
| <td VALIGN=TOP>Sets the VISITOR grammar option. This is a boolean option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>nodepackage</td> |
| |
| <td VALIGN=TOP>Sets the NODE_PACKAGE grammar option. This is a string option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>visitorexception</td> |
| |
| <td VALIGN=TOP>Sets the VISITOR_EXCEPTION grammar option. This is a string |
| option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| |
| <tr> |
| <td VALIGN=TOP>nodeprefix</td> |
| |
| <td VALIGN=TOP>Sets the NODE_PREFIX grammar option. This is a string option.</td> |
| |
| <td ALIGN=CENTER VALIGN=TOP>No</td> |
| </tr> |
| </table> |
| |
| <h3> |
| Example</h3> |
| |
| <blockquote> |
| <pre><jjtree |
| target="src/Parser.jjt" |
| outputdirectory="build/src" |
| javacchome="c:/program files/JavaCC" |
| nodeusesparser="true" |
| /></pre> |
| </blockquote> |
| This invokes JJTree on grammar file src/Parser.jjt, writing the generated |
| grammar file, Parser.jj, file to build/src. The grammar option NODE_USES_PARSER |
| is set to true when invoking JJTree. |
| <br> |
| <hr> |
| <p align="center">Copyright © 2001 Apache Software Foundation. All rights |
| Reserved.</p> |
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