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<h4 class="subsection">4.6.3 Macro</h4>
<p><a name="index-Macro-122"></a>
Syntax: <code>Macro [</code><var>filename</var><code>]</code><br>
Abbreviation: <code>MA</code>
<p class="noindent">executes the given file name as a macro.
<p>If the optional <var>filename</var> argument is not specified, the file
requester is opened, and you are prompted to select a file. (You can
inhibit the file requester opening by using the <code>NoFileReq</code>
command; see <a href="NoFileReq.html#NoFileReq">NoFileReq</a>.)
<p>If you escape from the file requester, you can input the file name on the
command line.
<p>Note that macros whose names do not conflict with a command can be called
without using <code>Macro</code>. Whenever <code>ne</code> is required to perform a command
it cannot find in its internal tables, it will look for a macro by that
name in the current directory. If this search also fails, <code>ne</code>
looks in <samp><span class="file">~/.ne</span></samp> and finally in <code>ne</code>'s global directory
(defined when <code>ne</code> was built, or in a place specified by your
<code>NE_GLOBAL_DIR</code> environment variable) for a macro file by that
name.
<p class="noindent"><strong>Warning:</strong> the first time a macro is executed it is cached
into a hash table and is kept <em>forever</em> in memory unless the
<code>UnloadMacros</code> command is issued; see <a href="UnloadMacros.html#UnloadMacros">UnloadMacros</a>. The next time a
macro with the same file name is invoked, the cached list is searched for it
before accessing the file using a case insensitive string comparison. That is,
if you call <code>~/foobar/macro</code>, a subsequent call for <code>/usr/MACRO</code> or
even just <code>MaCrO</code> will use the cached version of <code>~/foobar/macro</code>.
Note that the cache table is global to <code>ne</code> and not specific to any single
document. This greatly improves efficiency when macros are used repeatedly.
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