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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/gcc/Using-fast-enumeration.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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diff --git a/share/doc/gcc/Using-fast-enumeration.html b/share/doc/gcc/Using-fast-enumeration.html new file mode 100644 index 0000000..08b7ec1 --- /dev/null +++ b/share/doc/gcc/Using-fast-enumeration.html @@ -0,0 +1,122 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- This file documents the use of the GNU compilers. + +Copyright (C) 1988-2023 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; 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 5.1, http://www.gnu.org/software/texinfo/ --> +<head> +<title>Using the GNU Compiler Collection (GCC): Using fast enumeration</title> + +<meta name="description" content="Using the GNU Compiler Collection (GCC): Using fast enumeration"> +<meta name="keywords" content="Using the GNU Compiler Collection (GCC): Using fast enumeration"> +<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="Indices.html#Indices" rel="index" title="Indices"> +<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> +<link href="Fast-enumeration.html#Fast-enumeration" rel="up" title="Fast enumeration"> +<link href="c99_002dlike-fast-enumeration-syntax.html#c99_002dlike-fast-enumeration-syntax" rel="next" title="c99-like fast enumeration syntax"> +<link href="Fast-enumeration.html#Fast-enumeration" rel="previous" title="Fast enumeration"> +<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_US" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> +<a name="Using-fast-enumeration"></a> +<div class="header"> +<p> +Next: <a href="c99_002dlike-fast-enumeration-syntax.html#c99_002dlike-fast-enumeration-syntax" accesskey="n" rel="next">c99-like fast enumeration syntax</a>, Up: <a href="Fast-enumeration.html#Fast-enumeration" accesskey="u" rel="up">Fast enumeration</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indices.html#Indices" title="Index" rel="index">Index</a>]</p> +</div> +<hr> +<a name="Using-Fast-Enumeration"></a> +<h4 class="subsection">8.9.1 Using Fast Enumeration</h4> + +<p>GNU Objective-C provides support for the fast enumeration syntax: +</p> +<div class="smallexample"> +<pre class="smallexample"> id array = …; + id object; + + for (object in array) + { + /* Do something with 'object' */ + } +</pre></div> + +<p><code>array</code> needs to be an Objective-C object (usually a collection +object, for example an array, a dictionary or a set) which implements +the “Fast Enumeration Protocol” (see below). If you are using a +Foundation library such as GNUstep Base or Apple Cocoa Foundation, all +collection objects in the library implement this protocol and can be +used in this way. +</p> +<p>The code above would iterate over all objects in <code>array</code>. For +each of them, it assigns it to <code>object</code>, then executes the +<code>Do something with 'object'</code> statements. +</p> +<p>Here is a fully worked-out example using a Foundation library (which +provides the implementation of <code>NSArray</code>, <code>NSString</code> and +<code>NSLog</code>): +</p> +<div class="smallexample"> +<pre class="smallexample"> NSArray *array = [NSArray arrayWithObjects: @"1", @"2", @"3", nil]; + NSString *object; + + for (object in array) + NSLog (@"Iterating over %@", object); +</pre></div> + + + + + +</body> +</html> |