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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/gccint/Namespaces.html | |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
Change-Id: I7303388733328cd98ab9aa3c30236db67f2e9e9c
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diff --git a/share/doc/gccint/Namespaces.html b/share/doc/gccint/Namespaces.html new file mode 100644 index 0000000..f2f40af --- /dev/null +++ b/share/doc/gccint/Namespaces.html @@ -0,0 +1,176 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- 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>GNU Compiler Collection (GCC) Internals: Namespaces</title> + +<meta name="description" content="GNU Compiler Collection (GCC) Internals: Namespaces"> +<meta name="keywords" content="GNU Compiler Collection (GCC) Internals: Namespaces"> +<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="C-and-C_002b_002b-Trees.html#C-and-C_002b_002b-Trees" rel="up" title="C and C++ Trees"> +<link href="Classes.html#Classes" rel="next" title="Classes"> +<link href="Types-for-C_002b_002b.html#Types-for-C_002b_002b" rel="previous" title="Types for C++"> +<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="Namespaces"></a> +<div class="header"> +<p> +Next: <a href="Classes.html#Classes" accesskey="n" rel="next">Classes</a>, Previous: <a href="Types-for-C_002b_002b.html#Types-for-C_002b_002b" accesskey="p" rel="previous">Types for C++</a>, Up: <a href="C-and-C_002b_002b-Trees.html#C-and-C_002b_002b-Trees" accesskey="u" rel="up">C and C++ Trees</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="Namespaces-1"></a> +<h4 class="subsection">11.10.2 Namespaces</h4> +<a name="index-namespace_002c-scope"></a> +<a name="index-NAMESPACE_005fDECL-1"></a> + +<p>The root of the entire intermediate representation is the variable +<code>global_namespace</code>. This is the namespace specified with <code>::</code> +in C++ source code. All other namespaces, types, variables, functions, +and so forth can be found starting with this namespace. +</p> +<p>However, except for the fact that it is distinguished as the root of the +representation, the global namespace is no different from any other +namespace. Thus, in what follows, we describe namespaces generally, +rather than the global namespace in particular. +</p> +<p>A namespace is represented by a <code>NAMESPACE_DECL</code> node. +</p> +<p>The following macros and functions can be used on a <code>NAMESPACE_DECL</code>: +</p> +<dl compact="compact"> +<dt><code>DECL_NAME</code> +<a name="index-DECL_005fNAME-3"></a> +</dt> +<dd><p>This macro is used to obtain the <code>IDENTIFIER_NODE</code> corresponding to +the unqualified name of the name of the namespace (see <a href="Identifiers.html#Identifiers">Identifiers</a>). +The name of the global namespace is ‘<samp>::</samp>’, even though in C++ the +global namespace is unnamed. However, you should use comparison with +<code>global_namespace</code>, rather than <code>DECL_NAME</code> to determine +whether or not a namespace is the global one. An unnamed namespace +will have a <code>DECL_NAME</code> equal to <code>anonymous_namespace_name</code>. +Within a single translation unit, all unnamed namespaces will have the +same name. +</p> +</dd> +<dt><code>DECL_CONTEXT</code> +<a name="index-DECL_005fCONTEXT"></a> +</dt> +<dd><p>This macro returns the enclosing namespace. The <code>DECL_CONTEXT</code> for +the <code>global_namespace</code> is <code>NULL_TREE</code>. +</p> +</dd> +<dt><code>DECL_NAMESPACE_ALIAS</code> +<a name="index-DECL_005fNAMESPACE_005fALIAS"></a> +</dt> +<dd><p>If this declaration is for a namespace alias, then +<code>DECL_NAMESPACE_ALIAS</code> is the namespace for which this one is an +alias. +</p> +<p>Do not attempt to use <code>cp_namespace_decls</code> for a namespace which is +an alias. Instead, follow <code>DECL_NAMESPACE_ALIAS</code> links until you +reach an ordinary, non-alias, namespace, and call +<code>cp_namespace_decls</code> there. +</p> +</dd> +<dt><code>DECL_NAMESPACE_STD_P</code> +<a name="index-DECL_005fNAMESPACE_005fSTD_005fP"></a> +</dt> +<dd><p>This predicate holds if the namespace is the special <code>::std</code> +namespace. +</p> +</dd> +<dt><code>cp_namespace_decls</code> +<a name="index-cp_005fnamespace_005fdecls"></a> +</dt> +<dd><p>This function will return the declarations contained in the namespace, +including types, overloaded functions, other namespaces, and so forth. +If there are no declarations, this function will return +<code>NULL_TREE</code>. The declarations are connected through their +<code>TREE_CHAIN</code> fields. +</p> +<p>Although most entries on this list will be declarations, +<code>TREE_LIST</code> nodes may also appear. In this case, the +<code>TREE_VALUE</code> will be an <code>OVERLOAD</code>. The value of the +<code>TREE_PURPOSE</code> is unspecified; back ends should ignore this value. +As with the other kinds of declarations returned by +<code>cp_namespace_decls</code>, the <code>TREE_CHAIN</code> will point to the next +declaration in this list. +</p> +<p>For more information on the kinds of declarations that can occur on this +list, See <a href="Declarations.html#Declarations">Declarations</a>. Some declarations will not appear on this +list. In particular, no <code>FIELD_DECL</code>, <code>LABEL_DECL</code>, or +<code>PARM_DECL</code> nodes will appear here. +</p> +<p>This function cannot be used with namespaces that have +<code>DECL_NAMESPACE_ALIAS</code> set. +</p> +</dd> +</dl> + + +<hr> +<div class="header"> +<p> +Next: <a href="Classes.html#Classes" accesskey="n" rel="next">Classes</a>, Previous: <a href="Types-for-C_002b_002b.html#Types-for-C_002b_002b" accesskey="p" rel="previous">Types for C++</a>, Up: <a href="C-and-C_002b_002b-Trees.html#C-and-C_002b_002b-Trees" accesskey="u" rel="up">C and C++ Trees</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> + + + +</body> +</html> |