2000-11-14 09:30:38 +00:00
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<meta http-equiv="Content-Language" content="en-us">
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2005-03-07 18:11:14 +00:00
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<link rel="stylesheet" type="text/css" href="../stylesheets/style.css"/>
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2000-11-14 09:30:38 +00:00
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<title>ANTLR Task</title>
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</head>
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<body>
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<h2><a name="antlr">ANTLR</a></h2>
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<h3>Description</h3>
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<p>
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2001-02-13 12:32:01 +00:00
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Invokes the <a HREF="http://www.antlr.org/" target="_top">ANTLR</a> Translator generator
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2000-11-14 09:30:38 +00:00
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on a grammar file.
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</p>
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<p>
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To use the ANTLR task, set the <i>target</i> attribute to the name of the
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grammar file to process. Optionally, you can also set the
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<i>outputdirectory</i> to write the generated file to a specific directory.
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Otherwise ANTLR writes the generated files to the directory containing
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the grammar file.
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</p>
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<p>
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2003-04-01 14:44:00 +00:00
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This task only invokes ANTLR if the grammar file (or the
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supergrammar specified by the glib attribute) is newer than the
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generated files.
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2000-11-14 09:30:38 +00:00
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</p>
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2003-04-01 14:44:00 +00:00
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<p>Antlr 2.7.1 Note:
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2001-12-15 19:01:45 +00:00
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<i>
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To successfully run ANTLR, your best option is probably to build the whole
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jar with the provided script <b>mkalljar</b> and drop the resulting jar (about 300KB)
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into ${ant.home}/lib. Dropping the default jar (70KB) is probably not enough
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for most needs and your only option will be to add ANTLR home directory
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to your classpath as described in ANTLR <tt>install.html</tt> document.
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</i>
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</p>
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2003-04-01 14:44:00 +00:00
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<p>Antlr 2.7.2 Note:
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<i>
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Instead of the above, you will need antlrall.jar that can be created
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by the <b>antlr-all.jar</b> target of the Makefile provided with the
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download.
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</i>
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</p>
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<h3>Parameters</h3>
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<table border="1" cellpadding="2" cellspacing="0">
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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 grammar file to process.</td>
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<td valign="top" align="center">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">
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The directory to write the generated files to. If not set, the files
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are written to the directory containing the grammar file.
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</td>
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<td valign="top" align="center">No</td>
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</tr>
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2002-06-20 15:03:46 +00:00
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<tr>
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<td valign="top">glib</td>
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<td valign="top">
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An optional super grammar file that the target grammar overrides. This
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feature is only needed for advanced vocabularies.
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</td>
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<td valign="top" align="center">No</td>
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</tr>
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<tr>
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<td valign="top">debug</td>
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<td valign="top">
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When set to "yes", this flag adds code to the generated parser that will
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launch the ParseView debugger upon invocation. The default is "no".
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<br>
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Note: ParseView is a separate component that needs to be installed or your
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grammar will have compilation errors.
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</td>
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<td valign="top" align="center">No</td>
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</tr>
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<tr>
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<td valign="top">html</td>
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<td valign="top">
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Emit an html version of the grammar with hyperlinked actions.
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</td>
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<td valign="top" align="center">No</td>
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</tr>
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<tr>
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<td valign="top">diagnostic</td>
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<td valign="top">
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Generates a text file with debugging information based on the target grammar.
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</td>
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<td valign="top" align="center">No</td>
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</tr>
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<tr>
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<td valign="top">trace</td>
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<td valign="top">
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2002-06-22 23:38:38 +00:00
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Forces <b>all</b> rules to call traceIn/traceOut if set to "yes".
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The default is "no".
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</td>
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<td valign="top" align="center">No</td>
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</tr>
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<tr>
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<td valign="top">traceParser</td>
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<td valign="top">
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Only forces parser rules to call traceIn/traceOut if set to "yes".
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The default is "no".
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</td>
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<td valign="top" align="center">No</td>
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</tr>
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<tr>
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<td valign="top">traceLexer</td>
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<td valign="top">
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Only forces lexer rules to call traceIn/traceOut if set to "yes".
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The default is "no".
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</td>
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<td valign="top" align="center">No</td>
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</tr>
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<tr>
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<td valign="top">traceTreeWalker</td>
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<td valign="top">
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Only forces tree walker rules to call traceIn/traceOut if set to
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"yes". The default is "no".
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</td>
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<td valign="top" align="center">No</td>
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</tr>
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2001-12-15 13:41:39 +00:00
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<!--tr>
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2000-11-14 09:30:38 +00:00
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<td valign="top">fork</td>
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<td valign="top">Run ANTLR in a separate VM.</td>
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<td align="center" valign="top">No, default is "off"</td>
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</tr-->
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<tr>
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<td valign="top">dir</td>
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<td valign="top">The directory to invoke the VM in. <!--(ignored if
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fork is disabled)--></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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2001-11-18 15:59:18 +00:00
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<h3><a name="nested">Nested Elements</a></h3>
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<p><code>ANTLR</code> supports a nested <code><classpath></code>
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element, that represents a <a href="../using.html#path">PATH like
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structure</a>. It is given as a convenience if you have to specify
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the original ANTLR directory. In most cases, dropping the appropriate
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ANTLR jar in the normal Ant lib repository will be enough.</p>
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<h4>jvmarg</h4>
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2001-12-15 13:41:39 +00:00
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<p><!--If fork is enabled, -->Additional parameters may be passed to the new
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2001-11-18 15:59:18 +00:00
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VM via nested <code><jvmarg></code> attributes, for example:</p>
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<pre>
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2002-09-04 11:05:19 +00:00
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<antlr target="...">
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<jvmarg value="-Djava.compiler=NONE"/>
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...
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</antlr>
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</pre>
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<p>would run ANTLR in a VM without JIT.</p>
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<p><code><jvmarg></code> allows all attributes described in <a
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href="../using.html#arg">Command line arguments</a>.</p>
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2000-11-14 09:30:38 +00:00
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<h3>Example</h3>
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<blockquote><pre>
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<antlr
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target="etc/java.g"
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outputdirectory="build/src"
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/>
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</pre></blockquote>
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<p>
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This invokes ANTLR on grammar file etc/java.g, writing the generated
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files to build/src.
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</p>
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<hr>
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2005-03-07 18:11:14 +00:00
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<p align="center">Copyright © 2000-2005 The Apache Software Foundation. All rights
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Reserved.</p>
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</body>
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</html>
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