📄 sentry.htm

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<title> The sentry Class</title>
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<pre>
<font size=5>Class Name</font>            sentry

<font size=5>Header File</font>           &lt;sentry&gt;

<font size=5>Classification</font>      sentry
</pre>

<a href="sentry.htm#desc">Class Description</a><br>


<h1>Methods</h1>

<pre>

<a href="sentry.htm#sentry1">explicit sentry(basic_ostream&lt;charT,traits&gt;& Os)</a><br>
<a href="sentry.htm#sentry2">~sentry()</a><br>
<a href="sentry.htm#bool">operator bool()</a><br>
 
</pre>


<a name="desc"><h3>Description</h3></a>
<p>
The sentry class is a class used monitor pre-conditions and post-conditions
of an input/output class. The constructor for the sentry class performs
exception safe prefix operations.  The destructor for the sentry class performs
exception safe suffix operations. 

</p>
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<pre>

<a name="sentry1">Method            sentry</a>

Access            Public

Classification    Constructor

Syntax            explicit sentry(basic_ostream<charT,traits>& Os)

Parameters        Os is a reference to the ostream object that requires
                  exception safe prefix or suffix operations.


Return            None

</pre>

<h3>Description</h3>
<p>
This sentry() method is used to construct an object of type sentry. The sentry() constructor
has the effect of calling the opfx() method.  

</p>
<hr>
<pre>
<a name="sentry2">Method            sentry()</a>

Access            Public

Classification    Destructor

Syntax            ~sentry()      

Parameters        None

Return            None

</pre>

<h3>Description</h3>
<p>
This sentry() method is destructs an object of type sentry.  The ~sentry() destructor
has the effect of calling the osfx() method.

</p>
<hr>


<pre>
<a name="bool">Method            bool()</a>

Access            Public

Classification    Accessor

Syntax            operator bool()   

Parameters        None

Return            This method returns the value of ok_.


</pre>

<h3>Description</h3>
<p>
This bool() method returns the value of the ok_ attribute.
                            
</p>





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