| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html> |
| <!-- Copyright (C) 1988-2015 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 or |
| any later version published by the Free Software Foundation; with the |
| Invariant Sections being "Funding Free Software", the Front-Cover |
| Texts being (a) (see below), and with the Back-Cover Texts being (b) |
| (see below). A copy of the license is included in the section entitled |
| "GNU Free Documentation License". |
| |
| (a) The FSF's Front-Cover Text is: |
| |
| A GNU Manual |
| |
| (b) The FSF's Back-Cover Text is: |
| |
| You have freedom to copy and modify this GNU Manual, like GNU |
| software. Copies published by the Free Software Foundation raise |
| funds for GNU development. --> |
| <!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ --> |
| <head> |
| <title>GNU Compiler Collection (GCC) Internals: Attributes</title> |
| |
| <meta name="description" content="GNU Compiler Collection (GCC) Internals: Attributes"> |
| <meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Attributes"> |
| <meta name="resource-type" content="document"> |
| <meta name="distribution" content="global"> |
| <meta name="Generator" content="makeinfo"> |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> |
| <link href="index.html#Top" rel="start" title="Top"> |
| <link href="Option-Index.html#Option-Index" rel="index" title="Option Index"> |
| <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> |
| <link href="GENERIC.html#GENERIC" rel="up" title="GENERIC"> |
| <link href="Expression-trees.html#Expression-trees" rel="next" title="Expression trees"> |
| <link href="Adding-new-DECL-node-types.html#Adding-new-DECL-node-types" rel="prev" title="Adding new DECL node types"> |
| <style type="text/css"> |
| <!-- |
| a.summary-letter {text-decoration: none} |
| blockquote.smallquotation {font-size: smaller} |
| div.display {margin-left: 3.2em} |
| div.example {margin-left: 3.2em} |
| div.indentedblock {margin-left: 3.2em} |
| div.lisp {margin-left: 3.2em} |
| div.smalldisplay {margin-left: 3.2em} |
| div.smallexample {margin-left: 3.2em} |
| div.smallindentedblock {margin-left: 3.2em; font-size: smaller} |
| div.smalllisp {margin-left: 3.2em} |
| kbd {font-style:oblique} |
| pre.display {font-family: inherit} |
| pre.format {font-family: inherit} |
| pre.menu-comment {font-family: serif} |
| pre.menu-preformatted {font-family: serif} |
| pre.smalldisplay {font-family: inherit; font-size: smaller} |
| pre.smallexample {font-size: smaller} |
| pre.smallformat {font-family: inherit; font-size: smaller} |
| pre.smalllisp {font-size: smaller} |
| span.nocodebreak {white-space:nowrap} |
| span.nolinebreak {white-space:nowrap} |
| span.roman {font-family:serif; font-weight:normal} |
| span.sansserif {font-family:sans-serif; font-weight:normal} |
| ul.no-bullet {list-style: none} |
| --> |
| </style> |
| |
| |
| </head> |
| |
| <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> |
| <a name="Attributes"></a> |
| <div class="header"> |
| <p> |
| Next: <a href="Expression-trees.html#Expression-trees" accesskey="n" rel="next">Expression trees</a>, Previous: <a href="Declarations.html#Declarations" accesskey="p" rel="prev">Declarations</a>, Up: <a href="GENERIC.html#GENERIC" accesskey="u" rel="up">GENERIC</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> |
| </div> |
| <hr> |
| <a name="Attributes-in-trees"></a> |
| <h3 class="section">10.5 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> |
| |
| |
| |
| |
| |
| |
| </body> |
| </html> |
