Superx++ Lexicon: <try> ... <exception> statement

<try> ... <exception>

Purpose The <try> ... <exception> statement is used to monitor a section of the Superx++ program for any exceptions that may be raised/thrown. Whenever an exception is thrown it is trapped in the <exception> clause of the <try> ... <exception> statement. The most recent exception raised can be found within the exception object.

Format <try>
   {body}
   <exception>
      {exception handler}
   </exception>
</try>

{body} the set of Superx++ statements to monitor for a raised exception

{exception handler} the set of Superx++ statements to be executed when an exception is raised within the <try> statement

Example #1 <try>
   <if>
      <cond>
         <eval>
            <expr>today() = #29-May-2002#</expr>
         </eval>
      </cond>
      <true>
         <throw>No work today!</throw>
      </true>
      <false>
      </false>
   </if>
   <xout>
      Here I am at work...
   </xout>
   <exception>
      <xout>
         <eval object="exception/description" />
      </xout>
   </exception>
</try>
Prints the string No work today! to the output stream if the date is 29^th May 2002; otherwise, prints the text Here I am at work... to the output stream.

Purpose	The <try> ... <exception> statement is used to monitor a section of the Superx++ program for any exceptions that may be raised/thrown. Whenever an exception is thrown it is trapped in the <exception> clause of the <try> ... <exception> statement. The most recent exception raised can be found within the exception object.
Format	<try> {body} <exception> {exception handler} </exception> </try>
	{body}	the set of Superx++ statements to monitor for a raised exception
	{exception handler}	the set of Superx++ statements to be executed when an exception is raised within the <try> statement
Example #1	<try> <if> <cond> <eval> <expr>today() = #29-May-2002#</expr> </eval> </cond> <true> <throw>No work today!</throw> </true> <false> </false> </if> <xout> Here I am at work... </xout> <exception> <xout> <eval object="exception/description" /> </xout> </exception> </try> Prints the string No work today! to the output stream if the date is 29^th May 2002; otherwise, prints the text Here I am at work... to the output stream.