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86 lines
5.1 KiB
HTML
86 lines
5.1 KiB
HTML
4 years ago
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<html lang="en">
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<title>C++ Extensions - Using the GNU Compiler Collection (GCC)</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Using the GNU Compiler Collection (GCC)">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="prev" href="C-Extensions.html#C-Extensions" title="C Extensions">
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<link rel="next" href="Objective_002dC.html#Objective_002dC" title="Objective-C">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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Copyright (C) 1988-2015 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being ``Funding Free Software'', the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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(see below). A copy of the license is included in the section entitled
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``GNU Free Documentation License''.
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development.-->
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</head>
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<body>
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<div class="node">
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<a name="C++-Extensions"></a>
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<a name="C_002b_002b-Extensions"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Objective_002dC.html#Objective_002dC">Objective-C</a>,
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Previous: <a rel="previous" accesskey="p" href="C-Extensions.html#C-Extensions">C Extensions</a>,
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Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
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<hr>
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</div>
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<h2 class="chapter">7 Extensions to the C++ Language</h2>
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<p><a name="index-extensions_002c-C_002b_002b-language-4197"></a><a name="index-C_002b_002b-language-extensions-4198"></a>
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The GNU compiler provides these extensions to the C++ language (and you
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can also use most of the C language extensions in your C++ programs). If you
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want to write code that checks whether these features are available, you can
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test for the GNU compiler the same way as for C programs: check for a
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predefined macro <code>__GNUC__</code>. You can also use <code>__GNUG__</code> to
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test specifically for GNU C++ (see <a href="../cpp/Common-Predefined-Macros.html#Common-Predefined-Macros">Predefined Macros</a>).
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<ul class="menu">
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<li><a accesskey="1" href="C_002b_002b-Volatiles.html#C_002b_002b-Volatiles">C++ Volatiles</a>: What constitutes an access to a volatile object.
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<li><a accesskey="2" href="Restricted-Pointers.html#Restricted-Pointers">Restricted Pointers</a>: C99 restricted pointers and references.
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<li><a accesskey="3" href="Vague-Linkage.html#Vague-Linkage">Vague Linkage</a>: Where G++ puts inlines, vtables and such.
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<li><a accesskey="4" href="C_002b_002b-Interface.html#C_002b_002b-Interface">C++ Interface</a>: You can use a single C++ header file for both
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declarations and definitions.
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<li><a accesskey="5" href="Template-Instantiation.html#Template-Instantiation">Template Instantiation</a>: Methods for ensuring that exactly one copy of
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each needed template instantiation is emitted.
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<li><a accesskey="6" href="Bound-member-functions.html#Bound-member-functions">Bound member functions</a>: You can extract a function pointer to the
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method denoted by a ‘<samp><span class="samp">->*</span></samp>’ or ‘<samp><span class="samp">.*</span></samp>’ expression.
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<li><a accesskey="7" href="C_002b_002b-Attributes.html#C_002b_002b-Attributes">C++ Attributes</a>: Variable, function, and type attributes for C++ only.
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<li><a accesskey="8" href="Function-Multiversioning.html#Function-Multiversioning">Function Multiversioning</a>: Declaring multiple function versions.
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<li><a accesskey="9" href="Namespace-Association.html#Namespace-Association">Namespace Association</a>: Strong using-directives for namespace association.
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<li><a href="Type-Traits.html#Type-Traits">Type Traits</a>: Compiler support for type traits
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<li><a href="Java-Exceptions.html#Java-Exceptions">Java Exceptions</a>: Tweaking exception handling to work with Java.
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<li><a href="Deprecated-Features.html#Deprecated-Features">Deprecated Features</a>: Things will disappear from G++.
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<li><a href="Backwards-Compatibility.html#Backwards-Compatibility">Backwards Compatibility</a>: Compatibilities with earlier definitions of C++.
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</ul>
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</body></html>
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