2003-08-14 12:48:10 +00:00
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<meta http-equiv="Content-Language" content="en-us"></meta>
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<title>MacroDef Task</title>
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2003-12-03 13:16:01 +00:00
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.code { background: #EFEFEF; margin-top: }
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</style>
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2003-08-14 12:48:10 +00:00
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</head>
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<body>
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<h2><a name="macrodef">MacroDef</a></h2>
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<h3>Description</h3>
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<p>
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2003-10-31 09:51:24 +00:00
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This defines a new task using a <sequential>
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nested task as a template. Nested elements <attribute> and
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<element> are used to specify attributes and elements of
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the new task. These get substituted into the <sequential>
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task when the new task is run.
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</p>
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<p>
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2003-10-14 09:59:19 +00:00
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<em>since Ant 1.6</em>
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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">name</td>
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<td valign="top">The name of the new definition</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">uri</td>
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<td valign="top">
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The uri that this definition should live in.
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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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</table>
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<h3>Parameters specified as nested elements</h3>
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<h4>attribute</h4>
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<p>
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This is used to specify attributes of the new task. The values
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of the attributes get substituted into the templated task.
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The attributes will be required attributes unless a default
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value has been set.
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</p>
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<p>
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This attribute is placed in the body of the templated
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task using a notation similar to the ant property notation
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- @{attribute name}. (May be remembered as "put the substitution
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AT this location").
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The escape sequence @@{x} is used to allow @{x} to be
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placed in the text without substitution of x.
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This corresponds to the $${x} escape sequence for properties.
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</p>
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<p>
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The case of the attribute is ignored, so @{myAttribute} is treated the
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same as @{MyAttribute}.
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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">name</td>
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<td valign="top">The name of the new attribute</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">default</td>
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<td valign="top">
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The default value of the attribute.
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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">description</td>
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<td valign="top">
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This contains a description of the attribute.
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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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</table>
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<h4>element</h4>
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<p>
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This is used to specify nested elements of the new task.
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The contents of the nested elements of the task instance
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are placed in the templated task at the tag name.
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</p>
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2004-01-19 09:51:02 +00:00
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<p>
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The case of the element name is ignored.
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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">name</td>
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<td valign="top">The name of the new attribute</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">optional</td>
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<td valign="top">
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If true this nested element is optional. Default is
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false - i.e the nested element is required in
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the new task.
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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">description</td>
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<td valign="top">
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This contains a description
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informing the user what the contents of the element are expected to be.
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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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</table>
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<h3>Examples</h3>
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<p>
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The following example defined a task called testing and
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runs it.
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</p>
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<blockquote>
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<pre class=code>
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<macrodef name="testing">
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<attribute name="v" default="NOT SET"/>
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<element name="some-tasks" optional="yes"/>
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<sequential>
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<echo>v is @{v}</echo>
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<some-tasks/>
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</sequential>
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</macrodef>
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<testing v="This is v">
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<some-tasks>
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<echo>this is a test</echo>
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</some-tasks>
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</testing>
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</pre>
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</blockquote>
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<p>
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The following fragment defines a task called <call-cc> which
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take the attributes "target", "link" and "target.dir" and the
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nested element "cc-elements". The body of the task
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uses the <cc> task from the
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<a href="http://ant-contrib.sourceforge.net/">ant-contrib</a> project.
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</p>
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<blockquote>
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<pre class="code">
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<macrodef name="call-cc">
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<attribute name="target"/>
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<attribute name="link"/>
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<attribute name="target.dir"/>
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<element name="cc-elements"/>
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<sequential>
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<mkdir dir="${obj.dir}/@{target}"/>
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<mkdir dir="@{target.dir}"/>
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<cc link="@{link}" objdir="${obj.dir}/@{target}"
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outfile="@{target.dir}/@{target}">
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<compiler refid="compiler.options"/>
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<cc-elements/>
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</cc>
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</sequential>
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</macrodef>
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</pre>
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</blockquote>
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<p>
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This then can be used as follows:
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</p>
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<blockquote>
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<pre class="code">
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<call-cc target="unittests" link="executable"
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target.dir="${build.bin.dir}">
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<cc-elements>
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<includepath location="${gen.dir}"/>
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<includepath location="test"/>
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<fileset dir="test/unittest" includes = "**/*.cpp"/>
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<fileset dir="${gen.dir}" includes = "*.cpp"/>
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<linker refid="linker-libs"/>
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</cc-elements>
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</call-cc>
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</pre>
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</blockquote>
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<hr>
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2004-01-12 08:01:41 +00:00
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<p align="center">Copyright © 2003-2004 Apache Software
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Foundation. All rights Reserved.</p>
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</body>
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</html>
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