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+<hr>
+<a name="Attributes-in-trees"></a>
+<h3 class="section">11.5 Attributes in trees</h3>
+<a name="index-attributes"></a>
+
+<p>Attributes, as specified using the <code>__attribute__</code> keyword, are
+represented internally as a <code>TREE_LIST</code>.  The <code>TREE_PURPOSE</code>
+is the name of the attribute, as an <code>IDENTIFIER_NODE</code>.  The
+<code>TREE_VALUE</code> is a <code>TREE_LIST</code> of the arguments of the
+attribute, if any, or <code>NULL_TREE</code> if there are no arguments; the
+arguments are stored as the <code>TREE_VALUE</code> of successive entries in
+the list, and may be identifiers or expressions.  The <code>TREE_CHAIN</code>
+of the attribute is the next attribute in a list of attributes applying
+to the same declaration or type, or <code>NULL_TREE</code> if there are no
+further attributes in the list.
+</p>
+<p>Attributes may be attached to declarations and to types; these
+attributes may be accessed with the following macros.  All attributes
+are stored in this way, and many also cause other changes to the
+declaration or type or to other internal compiler data structures.
+</p>
+<dl>
+<dt><a name="index-DECL_005fATTRIBUTES"></a>Tree Macro: <em>tree</em> <strong>DECL_ATTRIBUTES</strong> <em>(tree <var>decl</var>)</em></dt>
+<dd><p>This macro returns the attributes on the declaration <var>decl</var>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-TYPE_005fATTRIBUTES"></a>Tree Macro: <em>tree</em> <strong>TYPE_ATTRIBUTES</strong> <em>(tree <var>type</var>)</em></dt>
+<dd><p>This macro returns the attributes on the type <var>type</var>.
+</p></dd></dl>
+
+
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