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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/gfortran/ASSOCIATED.html |
https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
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diff --git a/share/doc/gfortran/ASSOCIATED.html b/share/doc/gfortran/ASSOCIATED.html new file mode 100644 index 0000000..354025f --- /dev/null +++ b/share/doc/gfortran/ASSOCIATED.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) 1999-2023 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>The GNU Fortran Compiler: ASSOCIATED</title> + +<meta name="description" content="The GNU Fortran Compiler: ASSOCIATED"> +<meta name="keywords" content="The GNU Fortran Compiler: ASSOCIATED"> +<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="Intrinsic-Procedures.html#Intrinsic-Procedures" rel="up" title="Intrinsic Procedures"> +<link href="ATAN.html#ATAN" rel="next" title="ATAN"> +<link href="ASINH.html#ASINH" rel="previous" title="ASINH"> +<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="ASSOCIATED"></a> +<div class="header"> +<p> +Next: <a href="ATAN.html#ATAN" accesskey="n" rel="next">ATAN</a>, Previous: <a href="ASINH.html#ASINH" accesskey="p" rel="previous">ASINH</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</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="ASSOCIATED-_002d_002d_002d-Status-of-a-pointer-or-pointer_002ftarget-pair"></a> +<h3 class="section">8.22 <code>ASSOCIATED</code> — Status of a pointer or pointer/target pair</h3> +<a name="index-ASSOCIATED"></a> +<a name="index-pointer_002c-status"></a> +<a name="index-association-status"></a> + +<dl compact="compact"> +<dt><em>Description</em>:</dt> +<dd><p><code>ASSOCIATED(POINTER [, TARGET])</code> determines the status of the pointer +<var>POINTER</var> or if <var>POINTER</var> is associated with the target <var>TARGET</var>. +</p> +</dd> +<dt><em>Standard</em>:</dt> +<dd><p>Fortran 90 and later +</p> +</dd> +<dt><em>Class</em>:</dt> +<dd><p>Inquiry function +</p> +</dd> +<dt><em>Syntax</em>:</dt> +<dd><p><code>RESULT = ASSOCIATED(POINTER [, TARGET])</code> +</p> +</dd> +<dt><em>Arguments</em>:</dt> +<dd><table> +<tr><td width="15%"><var>POINTER</var></td><td width="70%"><var>POINTER</var> shall have the <code>POINTER</code> attribute +and it can be of any type.</td></tr> +<tr><td width="15%"><var>TARGET</var></td><td width="70%">(Optional) <var>TARGET</var> shall be a pointer or +a target. It must have the same type, kind type parameter, and +array rank as <var>POINTER</var>.</td></tr> +</table> +<p>The association status of neither <var>POINTER</var> nor <var>TARGET</var> shall be +undefined. +</p> +</dd> +<dt><em>Return value</em>:</dt> +<dd><p><code>ASSOCIATED(POINTER)</code> returns a scalar value of type <code>LOGICAL(4)</code>. +There are several cases: +</p><dl compact="compact"> +<dt>(A) When the optional <var>TARGET</var> is not present then</dt> +<dd><p><code>ASSOCIATED(POINTER)</code> is true if <var>POINTER</var> is associated with a target; otherwise, it returns false. +</p></dd> +<dt>(B) If <var>TARGET</var> is present and a scalar target, the result is true if</dt> +<dd><p><var>TARGET</var> is not a zero-sized storage sequence and the target associated with <var>POINTER</var> occupies the same storage units. If <var>POINTER</var> is +disassociated, the result is false. +</p></dd> +<dt>(C) If <var>TARGET</var> is present and an array target, the result is true if</dt> +<dd><p><var>TARGET</var> and <var>POINTER</var> have the same shape, are not zero-sized arrays, +are arrays whose elements are not zero-sized storage sequences, and +<var>TARGET</var> and <var>POINTER</var> occupy the same storage units in array element +order. +As in case(B), the result is false, if <var>POINTER</var> is disassociated. +</p></dd> +<dt>(D) If <var>TARGET</var> is present and an scalar pointer, the result is true</dt> +<dd><p>if <var>TARGET</var> is associated with <var>POINTER</var>, the target associated with +<var>TARGET</var> are not zero-sized storage sequences and occupy the same storage +units. +The result is false, if either <var>TARGET</var> or <var>POINTER</var> is disassociated. +</p></dd> +<dt>(E) If <var>TARGET</var> is present and an array pointer, the result is true if</dt> +<dd><p>target associated with <var>POINTER</var> and the target associated with <var>TARGET</var> +have the same shape, are not zero-sized arrays, are arrays whose elements are +not zero-sized storage sequences, and <var>TARGET</var> and <var>POINTER</var> occupy +the same storage units in array element order. +The result is false, if either <var>TARGET</var> or <var>POINTER</var> is disassociated. +</p></dd> +</dl> + +</dd> +<dt><em>Example</em>:</dt> +<dd><div class="smallexample"> +<pre class="smallexample">program test_associated + implicit none + real, target :: tgt(2) = (/1., 2./) + real, pointer :: ptr(:) + ptr => tgt + if (associated(ptr) .eqv. .false.) call abort + if (associated(ptr,tgt) .eqv. .false.) call abort +end program test_associated +</pre></div> + +</dd> +<dt><em>See also</em>:</dt> +<dd><p><a href="NULL.html#NULL">NULL</a> +</p></dd> +</dl> + + + +<hr> +<div class="header"> +<p> +Next: <a href="ATAN.html#ATAN" accesskey="n" rel="next">ATAN</a>, Previous: <a href="ASINH.html#ASINH" accesskey="p" rel="previous">ASINH</a>, Up: <a href="Intrinsic-Procedures.html#Intrinsic-Procedures" accesskey="u" rel="up">Intrinsic Procedures</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> |