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| <meta http-equiv="Content-Language" content="en-us"> |
| <title>ANTLR Task</title> |
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| <h2><a name="antlr">ANTLR</a></h2> |
| <h3>Description</h3> |
| <p> |
| Invokes the <a HREF="http://www.antlr.org/" target="_top">ANTLR</a> Translator generator |
| on a grammar file. |
| </p> |
| <p> |
| To use the ANTLR task, set the <i>target</i> attribute to the name of the |
| grammar file to process. Optionally, you can also set the |
| <i>outputdirectory</i> to write the generated file to a specific directory. |
| Otherwise ANTLR writes the generated files to the directory containing |
| the grammar file. |
| </p> |
| <p> |
| This task only invokes ANTLR if the grammar file is newer than the generated |
| files. |
| </p> |
| <p> |
| <i> |
| To successfully run ANTLR, your best option is probably to build the whole |
| jar with the provided script <b>mkalljar</b> and drop the resulting jar (about 300KB) |
| into ${ant.home}/lib. Dropping the default jar (70KB) is probably not enough |
| for most needs and your only option will be to add ANTLR home directory |
| to your classpath as described in ANTLR <tt>install.html</tt> document. |
| </i> |
| </p> |
| |
| <h3>Parameters</h3> |
| <table border="1" cellpadding="2" cellspacing="0"> |
| <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 grammar file to process.</td> |
| <td valign="top" align="center">Yes</td> |
| </tr> |
| <tr> |
| <td valign="top">outputdirectory</td> |
| <td valign="top"> |
| The directory to write the generated files to. If not set, the files |
| are written to the directory containing the grammar file. |
| </td> |
| <td valign="top" align="center">No</td> |
| </tr> |
| <!--tr> |
| <td valign="top">fork</td> |
| <td valign="top">Run ANTLR in a separate VM.</td> |
| <td align="center" valign="top">No, default is "off"</td> |
| </tr--> |
| <tr> |
| <td valign="top">dir</td> |
| <td valign="top">The directory to invoke the VM in. <!--(ignored if |
| fork is disabled)--></td> |
| <td align="center" valign="top">No</td> |
| </tr> |
| </table> |
| |
| <h3><a name="nested">Nested Elements</a></h3> |
| |
| <p><code>ANTLR</code> supports a nested <code><classpath></code> |
| element, that represents a <a href="../using.html#path">PATH like |
| structure</a>. It is given as a convenience if you have to specify |
| the original ANTLR directory. In most cases, dropping the appropriate |
| ANTLR jar in the normal Ant lib repository will be enough.</p> |
| |
| <h4>jvmarg</h4> |
| |
| <p><!--If fork is enabled, -->Additional parameters may be passed to the new |
| VM via nested <code><jvmarg></code> attributes, for example:</p> |
| |
| <pre> |
| <antlr target=...> |
| <jvmarg value="-Djava.compiler=NONE"/> |
| ... |
| </antlr> |
| </pre> |
| |
| <p>would run ANTLR in a VM without JIT.</p> |
| |
| <p><code><jvmarg></code> allows all attributes described in <a |
| href="../using.html#arg">Command line arguments</a>.</p> |
| |
| <h3>Example</h3> |
| <blockquote><pre> |
| <antlr |
| target="etc/java.g" |
| outputdirectory="build/src" |
| /> |
| </pre></blockquote> |
| <p> |
| This invokes ANTLR on grammar file etc/java.g, writing the generated |
| files to build/src. |
| </p> |
| <hr> |
| |
| <p align="center">Copyright © 2001 Apache Software Foundation. All rights |
| Reserved.</p> |
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| </body> |
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