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| author | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
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| committer | alk3pInjection <webmaster@raspii.tech> | 2024-02-04 16:16:35 +0800 |
| commit | abdaadbcae30fe0c9a66c7516798279fdfd97750 (patch) | |
| tree | 00a54a6e25601e43876d03c1a4a12a749d4a914c /share/doc/cpp/Elif.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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diff --git a/share/doc/cpp/Elif.html b/share/doc/cpp/Elif.html new file mode 100644 index 0000000..d346f5f --- /dev/null +++ b/share/doc/cpp/Elif.html @@ -0,0 +1,129 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1987-2023 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. A copy of +the license is included in the +section entitled "GNU Free Documentation License". + +This manual contains no Invariant Sections. The Front-Cover Texts are +(a) (see below), and the Back-Cover Texts are (b) (see below). + +(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 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>The C Preprocessor: Elif</title> + +<meta name="description" content="The C Preprocessor: Elif"> +<meta name="keywords" content="The C Preprocessor: Elif"> +<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="Index-of-Directives.html#Index-of-Directives" rel="index" title="Index of Directives"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Conditional-Syntax.html#Conditional-Syntax" rel="up" title="Conditional Syntax"> +<link href="_005f_005fhas_005fattribute.html#g_t_005f_005fhas_005fattribute" rel="next" title="__has_attribute"> +<link href="Else.html#Else" rel="previous" title="Else"> +<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="Elif"></a> +<div class="header"> +<p> +Next: <a href="_005f_005fhas_005fattribute.html#g_t_005f_005fhas_005fattribute" accesskey="n" rel="next"><code>__has_attribute</code></a>, Previous: <a href="Else.html#Else" accesskey="p" rel="previous">Else</a>, Up: <a href="Conditional-Syntax.html#Conditional-Syntax" accesskey="u" rel="up">Conditional Syntax</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> +</div> +<hr> +<a name="Elif-1"></a> +<h4 class="subsection">4.2.5 Elif</h4> + +<a name="index-_0023elif"></a> +<p>One common case of nested conditionals is used to check for more than two +possible alternatives. For example, you might have +</p> +<div class="smallexample"> +<pre class="smallexample">#if X == 1 +… +#else /* X != 1 */ +#if X == 2 +… +#else /* X != 2 */ +… +#endif /* X != 2 */ +#endif /* X != 1 */ +</pre></div> + +<p>Another conditional directive, ‘<samp>#elif</samp>’, allows this to be +abbreviated as follows: +</p> +<div class="smallexample"> +<pre class="smallexample">#if X == 1 +… +#elif X == 2 +… +#else /* X != 2 and X != 1*/ +… +#endif /* X != 2 and X != 1*/ +</pre></div> + +<p>‘<samp>#elif</samp>’ stands for “else if”. Like ‘<samp>#else</samp>’, it goes in the +middle of a conditional group and subdivides it; it does not require a +matching ‘<samp>#endif</samp>’ of its own. Like ‘<samp>#if</samp>’, the ‘<samp>#elif</samp>’ +directive includes an expression to be tested. The text following the +‘<samp>#elif</samp>’ is processed only if the original ‘<samp>#if</samp>’-condition +failed and the ‘<samp>#elif</samp>’ condition succeeds. +</p> +<p>More than one ‘<samp>#elif</samp>’ can go in the same conditional group. Then +the text after each ‘<samp>#elif</samp>’ is processed only if the ‘<samp>#elif</samp>’ +condition succeeds after the original ‘<samp>#if</samp>’ and all previous +‘<samp>#elif</samp>’ directives within it have failed. +</p> +<p>‘<samp>#else</samp>’ is allowed after any number of ‘<samp>#elif</samp>’ directives, but +‘<samp>#elif</samp>’ may not follow ‘<samp>#else</samp>’. +</p> + + + +</body> +</html> |