master/reconstruct/page046.inc

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<!--
        UCSD Pascal System II.0 User Manual
        Copyright (C) 1979 Regents of the University of California

        HTML markup and formatting
        Copyright (C) 2006, 2007, 2010 Peter Miller
-->
<p>
 <#include reconstruct/page "page046" "46">
<blockquote>
<b>Figure 3.8</b>
<hr><pre>PROGRAM STRING1;
BEGIN
  WRITE('TOO WISE 0;
  WRITE('YOU ARE');
  WRITELN(',');          (* <i>Cursor finishes in this line</i> *)
  WRITELN('TOO WISE ');
  WRITELN('YOU BE.')
END.                     (* <i>Cursor starts in this line</i> *)</pre><hr>
</blockquote>
<p>
Example 3: On the first find we type &ldquo;F/WRITE/&rdquo;.  This locates
the first &ldquo;<tt>WRITE</tt>&rdquo;.
Now typing &ldquo;FS&rdquo; will make the prompt line flash:
<blockquote>
<pre>&gt;Find[1]: L)it &lt;target&gt;  =&gt;S</pre>
</blockquote>
and the cursor will appear at the second WRITE.
<p>
<a name="commandr"></a>
<b>Replace</b>
<p>
REPLACE mode is reached by typing &ldquo;R&rdquo; while at the Edit level.
On entering REPLACE mode one of the two prompt lines in Figure 3.9
appears.  In this example, a &lt;repeat-factor&gt; of four is assumed.
<blockquote>
<b>Figure 3.9</b>
<a name="literal.38"></a>
<a name="verify.39"></a>
<a name="token.40"></a>
<hr><pre>&gt;Replace[4]: L(it V(fy &lt;targ&gt; &lt;sub&gt; =&gt;
&gt;Replace[4]: T(ok V(fy &lt;targ&gt; &lt;sub&gt; :&gt;</pre><hr>
</blockquote>
<p>
Example 1: Type &ldquo;RL/QX//YZ/&rdquo; which make the prompt line appear as:
<blockquote>
<pre>&gt;Replace[1]: L)it V)fy &lt;targ&gt; &lt;sub&gt; =&gt;L/QX//YZ/</pre>
</blockquote>
This command will change: &ldquo;<tt>VAR SIZEQX: INTEGER;</tt>&ldquo; to
&ldquo;<tt>VAR SIZEYZ: INTEGER;</tt>&rdquo;.
Literal mode is necessary because the string QX is
not a token but is part of the token <tt>SIZEQX</tt>.
<p>
Example 2: In Token mode REPLACE ignores spaces between tokens
when finding patterns to replace.  For example, using the lines on the
left hand side of Figure 3.10 and typing: &ldquo;2RT/(',')/.LN.&rdquo;
The prompt line should appear as:
<blockquote>
<pre>&gt;Replace: L)it V)fy &lt;targ&gt; &lt;sub&gt; =&gt;/(',')/.LN.</pre>
</blockquote>

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