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104 lines
4.7 KiB
HTML
104 lines
4.7 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- Copyright (C) 1987-2018 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. A copy of
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the license is included in the
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section entitled "GNU Free Documentation License".
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This manual contains no Invariant Sections. The Front-Cover Texts are
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(a) (see below), and the Back-Cover Texts are (b) (see below).
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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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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Predefined Macros (The C Preprocessor)</title>
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<meta name="description" content="Predefined Macros (The C Preprocessor)">
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<meta name="keywords" content="Predefined Macros (The C Preprocessor)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Index-of-Directives.html#Index-of-Directives" rel="index" title="Index of Directives">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Macros.html#Macros" rel="up" title="Macros">
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<link href="Standard-Predefined-Macros.html#Standard-Predefined-Macros" rel="next" title="Standard Predefined Macros">
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<link href="Variadic-Macros.html#Variadic-Macros" rel="prev" title="Variadic Macros">
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</style>
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</head>
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<body lang="en">
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<a name="Predefined-Macros"></a>
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<div class="header">
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<p>
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Next: <a href="Undefining-and-Redefining-Macros.html#Undefining-and-Redefining-Macros" accesskey="n" rel="next">Undefining and Redefining Macros</a>, Previous: <a href="Variadic-Macros.html#Variadic-Macros" accesskey="p" rel="prev">Variadic Macros</a>, Up: <a href="Macros.html#Macros" accesskey="u" rel="up">Macros</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index-of-Directives.html#Index-of-Directives" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Predefined-Macros-1"></a>
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<h3 class="section">3.7 Predefined Macros</h3>
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<a name="index-predefined-macros"></a>
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<p>Several object-like macros are predefined; you use them without
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supplying their definitions. They fall into three classes: standard,
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common, and system-specific.
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</p>
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<p>In C++, there is a fourth category, the named operators. They act like
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predefined macros, but you cannot undefine them.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<tr><td align="left" valign="top">• <a href="Standard-Predefined-Macros.html#Standard-Predefined-Macros" accesskey="1">Standard Predefined Macros</a>:</td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="Common-Predefined-Macros.html#Common-Predefined-Macros" accesskey="2">Common Predefined Macros</a>:</td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="System_002dspecific-Predefined-Macros.html#System_002dspecific-Predefined-Macros" accesskey="3">System-specific Predefined Macros</a>:</td><td> </td><td align="left" valign="top">
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</td></tr>
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<tr><td align="left" valign="top">• <a href="C_002b_002b-Named-Operators.html#C_002b_002b-Named-Operators" accesskey="4">C++ Named Operators</a>:</td><td> </td><td align="left" valign="top">
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</td></tr>
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</table>
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</body>
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</html>
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