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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/Extensions-to-namelist.html | |
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diff --git a/share/doc/gfortran/Extensions-to-namelist.html b/share/doc/gfortran/Extensions-to-namelist.html new file mode 100644 index 0000000..9a2036a --- /dev/null +++ b/share/doc/gfortran/Extensions-to-namelist.html @@ -0,0 +1,161 @@ +<!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: Extensions to namelist</title> + +<meta name="description" content="The GNU Fortran Compiler: Extensions to namelist"> +<meta name="keywords" content="The GNU Fortran Compiler: Extensions to namelist"> +<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="Extensions-implemented-in-GNU-Fortran.html#Extensions-implemented-in-GNU-Fortran" rel="up" title="Extensions implemented in GNU Fortran"> +<link href="X-format-descriptor-without-count-field.html#X-format-descriptor-without-count-field" rel="next" title="X format descriptor without count field"> +<link href="Old_002dstyle-variable-initialization.html#Old_002dstyle-variable-initialization" rel="previous" title="Old-style variable initialization"> +<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="Extensions-to-namelist"></a> +<div class="header"> +<p> +Next: <a href="X-format-descriptor-without-count-field.html#X-format-descriptor-without-count-field" accesskey="n" rel="next">X format descriptor without count field</a>, Previous: <a href="Old_002dstyle-variable-initialization.html#Old_002dstyle-variable-initialization" accesskey="p" rel="previous">Old-style variable initialization</a>, Up: <a href="Extensions-implemented-in-GNU-Fortran.html#Extensions-implemented-in-GNU-Fortran" accesskey="u" rel="up">Extensions implemented in GNU Fortran</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="Extensions-to-namelist-1"></a> +<h4 class="subsection">5.1.3 Extensions to namelist</h4> +<a name="index-Namelist"></a> + +<p>GNU Fortran fully supports the Fortran 95 standard for namelist I/O +including array qualifiers, substrings and fully qualified derived types. +The output from a namelist write is compatible with namelist read. The +output has all names in upper case and indentation to column 1 after the +namelist name. Two extensions are permitted: +</p> +<p>Old-style use of ‘<samp>$</samp>’ instead of ‘<samp>&</samp>’ +</p><div class="smallexample"> +<pre class="smallexample">$MYNML + X(:)%Y(2) = 1.0 2.0 3.0 + CH(1:4) = "abcd" +$END +</pre></div> + +<p>It should be noted that the default terminator is ‘<samp>/</samp>’ rather than +‘<samp>&END</samp>’. +</p> +<p>Querying of the namelist when inputting from stdin. After at least +one space, entering ‘<samp>?</samp>’ sends to stdout the namelist name and the names of +the variables in the namelist: +</p><div class="smallexample"> +<pre class="smallexample"> ? + +&mynml + x + x%y + ch +&end +</pre></div> + +<p>Entering ‘<samp>=?</samp>’ outputs the namelist to stdout, as if +<code>WRITE(*,NML = mynml)</code> had been called: +</p><div class="smallexample"> +<pre class="smallexample">=? + +&MYNML + X(1)%Y= 0.000000 , 1.000000 , 0.000000 , + X(2)%Y= 0.000000 , 2.000000 , 0.000000 , + X(3)%Y= 0.000000 , 3.000000 , 0.000000 , + CH=abcd, / +</pre></div> + +<p>To aid this dialog, when input is from stdin, errors send their +messages to stderr and execution continues, even if <code>IOSTAT</code> is set. +</p> +<p><code>PRINT</code> namelist is permitted. This causes an error if +<samp>-std=f95</samp> is used. +</p><div class="smallexample"> +<pre class="smallexample">PROGRAM test_print + REAL, dimension (4) :: x = (/1.0, 2.0, 3.0, 4.0/) + NAMELIST /mynml/ x + PRINT mynml +END PROGRAM test_print +</pre></div> + +<p>Expanded namelist reads are permitted. This causes an error if +<samp>-std=f95</samp> is used. In the following example, the first element +of the array will be given the value 0.00 and the two succeeding +elements will be given the values 1.00 and 2.00. +</p><div class="smallexample"> +<pre class="smallexample">&MYNML + X(1,1) = 0.00 , 1.00 , 2.00 +/ +</pre></div> + +<p>When writing a namelist, if no <code>DELIM=</code> is specified, by default a +double quote is used to delimit character strings. If -std=F95, F2003, +or F2008, etc, the delim status is set to ’none’. Defaulting to +quotes ensures that namelists with character strings can be subsequently +read back in accurately. +</p> +<hr> +<div class="header"> +<p> +Next: <a href="X-format-descriptor-without-count-field.html#X-format-descriptor-without-count-field" accesskey="n" rel="next">X format descriptor without count field</a>, Previous: <a href="Old_002dstyle-variable-initialization.html#Old_002dstyle-variable-initialization" accesskey="p" rel="previous">Old-style variable initialization</a>, Up: <a href="Extensions-implemented-in-GNU-Fortran.html#Extensions-implemented-in-GNU-Fortran" accesskey="u" rel="up">Extensions implemented in GNU Fortran</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> |