| <html lang="en"> |
| <head> |
| <title>Argp Children - The GNU C Library</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="The GNU C Library"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="Argp-Parsers.html#Argp-Parsers" title="Argp Parsers"> |
| <link rel="prev" href="Argp-Parser-Functions.html#Argp-Parser-Functions" title="Argp Parser Functions"> |
| <link rel="next" href="Argp-Help-Filtering.html#Argp-Help-Filtering" title="Argp Help Filtering"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| This file documents the GNU C library. |
| |
| This is Edition 0.12, last updated 2007-10-27, |
| of `The GNU C Library Reference Manual', for version |
| 2.8 (Sourcery G++ Lite 2011.03-41). |
| |
| Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, |
| 2003, 2007, 2008, 2010 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 ``Free Software Needs Free Documentation'' |
| and ``GNU Lesser General Public License'', the Front-Cover texts being |
| ``A GNU Manual'', and with the Back-Cover Texts as in (a) below. A |
| copy of the license is included in the section entitled "GNU Free |
| Documentation License". |
| |
| (a) The FSF's Back-Cover Text is: ``You have the freedom to |
| copy and modify this GNU manual. Buying copies from the FSF |
| supports it in developing GNU and promoting software freedom.''--> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| <link rel="stylesheet" type="text/css" href="../cs.css"> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="Argp-Children"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="Argp-Help-Filtering.html#Argp-Help-Filtering">Argp Help Filtering</a>, |
| Previous: <a rel="previous" accesskey="p" href="Argp-Parser-Functions.html#Argp-Parser-Functions">Argp Parser Functions</a>, |
| Up: <a rel="up" accesskey="u" href="Argp-Parsers.html#Argp-Parsers">Argp Parsers</a> |
| <hr> |
| </div> |
| |
| <h4 class="subsection">25.3.6 Combining Multiple Argp Parsers</h4> |
| |
| <p>The <code>children</code> field in a <code>struct argp</code> enables other argp |
| parsers to be combined with the referencing one for the parsing of a |
| single set of arguments. This field should point to a vector of |
| <code>struct argp_child</code>, which is terminated by an entry having a value |
| of zero in the <code>argp</code> field. |
| |
| <p>Where conflicts between combined parsers arise, as when two specify an |
| option with the same name, the parser conflicts are resolved in favor of |
| the parent argp parser(s), or the earlier of the argp parsers in the |
| list of children. |
| |
| <!-- argp.h --> |
| <!-- GNU --> |
| <div class="defun"> |
| — Data Type: <b>struct argp_child</b><var><a name="index-struct-argp_005fchild-3066"></a></var><br> |
| <blockquote><p>An entry in the list of subsidiary argp parsers pointed to by the |
| <code>children</code> field in a <code>struct argp</code>. The fields are as |
| follows: |
| |
| <dl> |
| <dt><code>const struct argp *argp</code><dd>The child argp parser, or zero to end of the list. |
| |
| <br><dt><code>int flags</code><dd>Flags for this child. |
| |
| <br><dt><code>const char *header</code><dd>If non-zero, this is an optional header to be printed within help output |
| before the child options. As a side-effect, a non-zero value forces the |
| child options to be grouped together. To achieve this effect without |
| actually printing a header string, use a value of <code>""</code>. As with |
| header strings specified in an option entry, the conventional value of |
| the last character is ‘<samp><span class="samp">:</span></samp>’. See <a href="Argp-Option-Vectors.html#Argp-Option-Vectors">Argp Option Vectors</a>. |
| |
| <br><dt><code>int group</code><dd>This is where the child options are grouped relative to the other |
| `consolidated' options in the parent argp parser. The values are the |
| same as the <code>group</code> field in <code>struct argp_option</code>. See <a href="Argp-Option-Vectors.html#Argp-Option-Vectors">Argp Option Vectors</a>. All child-groupings follow parent options at a |
| particular group level. If both this field and <code>header</code> are zero, |
| then the child's options aren't grouped together, they are merged with |
| parent options at the parent option group level. |
| |
| </dl> |
| </p></blockquote></div> |
| |
| </body></html> |
| |
