| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html> |
| <!-- Copyright (C) 1988-2015 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" and "Free Software Needs |
| Free Documentation", with the Front-Cover Texts being "A GNU Manual," |
| and with the Back-Cover Texts as in (a) below. |
| |
| (a) The FSF's Back-Cover Text is: "You are free to copy and modify |
| this GNU Manual. Buying copies from GNU Press supports the FSF in |
| developing GNU and promoting software freedom." --> |
| <!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ --> |
| <head> |
| <title>Debugging with GDB: Word Designators</title> |
| |
| <meta name="description" content="Debugging with GDB: Word Designators"> |
| <meta name="keywords" content="Debugging with GDB: Word Designators"> |
| <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="Concept-Index.html#Concept-Index" rel="index" title="Concept Index"> |
| <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> |
| <link href="History-Interaction.html#History-Interaction" rel="up" title="History Interaction"> |
| <link href="Modifiers.html#Modifiers" rel="next" title="Modifiers"> |
| <link href="Event-Designators.html#Event-Designators" rel="prev" title="Event Designators"> |
| <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="Word-Designators"></a> |
| <div class="header"> |
| <p> |
| Next: <a href="Modifiers.html#Modifiers" accesskey="n" rel="next">Modifiers</a>, Previous: <a href="Event-Designators.html#Event-Designators" accesskey="p" rel="prev">Event Designators</a>, Up: <a href="History-Interaction.html#History-Interaction" accesskey="u" rel="up">History Interaction</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p> |
| </div> |
| <hr> |
| <a name="Word-Designators-1"></a> |
| <h4 class="subsection">33.1.2 Word Designators</h4> |
| |
| <p>Word designators are used to select desired words from the event. |
| A ‘<samp>:</samp>’ separates the event specification from the word designator. It |
| may be omitted if the word designator begins with a ‘<samp>^</samp>’, ‘<samp>$</samp>’, |
| ‘<samp>*</samp>’, ‘<samp>-</samp>’, or ‘<samp>%</samp>’. Words are numbered from the beginning |
| of the line, with the first word being denoted by 0 (zero). Words are |
| inserted into the current line separated by single spaces. |
| </p> |
| <p>For example, |
| </p> |
| <dl compact="compact"> |
| <dt><code>!!</code></dt> |
| <dd><p>designates the preceding command. When you type this, the preceding |
| command is repeated in toto. |
| </p> |
| </dd> |
| <dt><code>!!:$</code></dt> |
| <dd><p>designates the last argument of the preceding command. This may be |
| shortened to <code>!$</code>. |
| </p> |
| </dd> |
| <dt><code>!fi:2</code></dt> |
| <dd><p>designates the second argument of the most recent command starting with |
| the letters <code>fi</code>. |
| </p></dd> |
| </dl> |
| |
| <p>Here are the word designators: |
| </p> |
| <dl compact="compact"> |
| <dt><code>0 (zero)</code></dt> |
| <dd><p>The <code>0</code>th word. For many applications, this is the command word. |
| </p> |
| </dd> |
| <dt><code><var>n</var></code></dt> |
| <dd><p>The <var>n</var>th word. |
| </p> |
| </dd> |
| <dt><code>^</code></dt> |
| <dd><p>The first argument; that is, word 1. |
| </p> |
| </dd> |
| <dt><code>$</code></dt> |
| <dd><p>The last argument. |
| </p> |
| </dd> |
| <dt><code>%</code></dt> |
| <dd><p>The word matched by the most recent ‘<samp>?<var>string</var>?</samp>’ search. |
| </p> |
| </dd> |
| <dt><code><var>x</var>-<var>y</var></code></dt> |
| <dd><p>A range of words; ‘<samp>-<var>y</var></samp>’ abbreviates ‘<samp>0-<var>y</var></samp>’. |
| </p> |
| </dd> |
| <dt><code>*</code></dt> |
| <dd><p>All of the words, except the <code>0</code>th. This is a synonym for ‘<samp>1-$</samp>’. |
| It is not an error to use ‘<samp>*</samp>’ if there is just one word in the event; |
| the empty string is returned in that case. |
| </p> |
| </dd> |
| <dt><code><var>x</var>*</code></dt> |
| <dd><p>Abbreviates ‘<samp><var>x</var>-$</samp>’ |
| </p> |
| </dd> |
| <dt><code><var>x</var>-</code></dt> |
| <dd><p>Abbreviates ‘<samp><var>x</var>-$</samp>’ like ‘<samp><var>x</var>*</samp>’, but omits the last word. |
| </p> |
| </dd> |
| </dl> |
| |
| <p>If a word designator is supplied without an event specification, the |
| previous command is used as the event. |
| </p> |
| <hr> |
| <div class="header"> |
| <p> |
| Next: <a href="Modifiers.html#Modifiers" accesskey="n" rel="next">Modifiers</a>, Previous: <a href="Event-Designators.html#Event-Designators" accesskey="p" rel="prev">Event Designators</a>, Up: <a href="History-Interaction.html#History-Interaction" accesskey="u" rel="up">History Interaction</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p> |
| </div> |
| |
| |
| |
| </body> |
| </html> |
