86 lines
3.7 KiB
HTML
86 lines
3.7 KiB
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<title>Event Designators - Debugging with GDB</title>
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="History-Interaction.html#History-Interaction" title="History Interaction">
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<link rel="next" href="Word-Designators.html#Word-Designators" title="Word Designators">
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<div class="node">
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<a name="Event-Designators"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Word-Designators.html#Word-Designators">Word Designators</a>,
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Up: <a rel="up" accesskey="u" href="History-Interaction.html#History-Interaction">History Interaction</a>
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<hr>
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</div>
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<h4 class="subsection">33.1.1 Event Designators</h4>
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<p><a name="index-event-designators-3294"></a>
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An event designator is a reference to a command line entry in the
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history list.
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Unless the reference is absolute, events are relative to the current
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position in the history list.
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<a name="index-history-events-3295"></a>
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<dl>
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<dt><code>!</code><dd>Start a history substitution, except when followed by a space, tab,
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the end of the line, or ‘<samp><span class="samp">=</span></samp>’.
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<br><dt><code>!</code><var>n</var><dd>Refer to command line <var>n</var>.
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<br><dt><code>!-</code><var>n</var><dd>Refer to the command <var>n</var> lines back.
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<br><dt><code>!!</code><dd>Refer to the previous command. This is a synonym for ‘<samp><span class="samp">!-1</span></samp>’.
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<br><dt><code>!</code><var>string</var><dd>Refer to the most recent command
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preceding the current position in the history list
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starting with <var>string</var>.
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<br><dt><code>!?</code><var>string</var><code>[?]</code><dd>Refer to the most recent command
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preceding the current position in the history list
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containing <var>string</var>.
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The trailing
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‘<samp><span class="samp">?</span></samp>’ may be omitted if the <var>string</var> is followed immediately by
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a newline.
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<br><dt><code>^</code><var>string1</var><code>^</code><var>string2</var><code>^</code><dd>Quick Substitution. Repeat the last command, replacing <var>string1</var>
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with <var>string2</var>. Equivalent to
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<code>!!:s/</code><var>string1</var><code>/</code><var>string2</var><code>/</code>.
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<br><dt><code>!#</code><dd>The entire command line typed so far.
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</dl>
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</body></html>
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