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+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements. See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<html>
+
+<head>
+<meta http-equiv="Content-Language" content="en-us">
+<link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
+<title>ANTLR Task</title>
+</head>
+
+<body>
+
+<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 (or the
+ supergrammar specified by the glib attribute) is newer than the
+ generated files.
+</p>
+<p>Antlr 2.7.1 Note:
+<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>
+<p>Antlr 2.7.2 Note:
+<i>
+ Instead of the above, you will need antlrall.jar that can be created
+ by the <b>antlr-all.jar</b> target of the Makefile provided with the
+ download.
+</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">glib</td>
+ <td valign="top">
+ An optional super grammar file that the target grammar overrides. This
+ feature is only needed for advanced vocabularies.
+ </td>
+ <td valign="top" align="center">No</td>
+ </tr>
+ <tr>
+ <td valign="top">debug</td>
+ <td valign="top">
+ When set to "yes", this flag adds code to the generated parser that will
+ launch the ParseView debugger upon invocation. The default is "no".
+ <br>
+ Note: ParseView is a separate component that needs to be installed or your
+ grammar will have compilation errors.
+ </td>
+ <td valign="top" align="center">No</td>
+ </tr>
+ <tr>
+ <td valign="top">html</td>
+ <td valign="top">
+ Emit an html version of the grammar with hyperlinked actions.
+ </td>
+ <td valign="top" align="center">No</td>
+ </tr>
+ <tr>
+ <td valign="top">diagnostic</td>
+ <td valign="top">
+ Generates a text file with debugging information based on the target grammar.
+ </td>
+ <td valign="top" align="center">No</td>
+ </tr>
+ <tr>
+ <td valign="top">trace</td>
+ <td valign="top">
+ Forces <b>all</b> rules to call traceIn/traceOut if set to "yes".
+ The default is "no".
+ </td>
+ <td valign="top" align="center">No</td>
+ </tr>
+ <tr>
+ <td valign="top">traceParser</td>
+ <td valign="top">
+ Only forces parser rules to call traceIn/traceOut if set to "yes".
+ The default is "no".
+ </td>
+ <td valign="top" align="center">No</td>
+ </tr>
+ <tr>
+ <td valign="top">traceLexer</td>
+ <td valign="top">
+ Only forces lexer rules to call traceIn/traceOut if set to "yes".
+ The default is "no".
+ </td>
+ <td valign="top" align="center">No</td>
+ </tr>
+ <tr>
+ <td valign="top">traceTreeWalker</td>
+ <td valign="top">
+ Only forces tree walker rules to call traceIn/traceOut if set to
+ "yes". The default is "no".
+ </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 &quot;off&quot;</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>&lt;classpath&gt;</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>&lt;jvmarg&gt;</code> attributes, for example:</p>
+
+<pre>
+&lt;antlr target="..."&gt;
+ &lt;jvmarg value=&quot;-Djava.compiler=NONE&quot;/&gt;
+ ...
+&lt;/antlr&gt;
+</pre>
+
+<p>would run ANTLR in a VM without JIT.</p>
+
+<p><code>&lt;jvmarg&gt;</code> allows all attributes described in <a
+href="../using.html#arg">Command line arguments</a>.</p>
+
+<h3>Example</h3>
+<blockquote><pre>
+&lt;antlr
+ target=&quot;etc/java.g&quot;
+ outputdirectory=&quot;build/src&quot;
+/&gt;
+</pre></blockquote>
+<p>
+ This invokes ANTLR on grammar file etc/java.g, writing the generated
+ files to build/src.
+</p>
+
+
+</body>
+</html>
+