OpenEuphoria

Re: Language Design

• Posted by David Cuny <dcuny at lanset.com> May 28, 2004
• 480 views

Lucius L Hilley III wrote:

> Just great, Now I feel as if I've been tricked to accept goto's.

Try/Catch offers a structured way of handling errors, and gives you the 
functionality of a Goto:

   constant leaveTheLoops = new_error()
 
   try
      for i = 1 to 100 do
         for j = 1 to 100 do
            for k = 1 to 100 do
               -- generate an error
               throw( leaveTheLoops )
            end for
         end for
      end for
   catch leaveTheLoops
      printf( 1, "here i am!", {} )
   end try

Of course, Goto has less overhead (my own Basic interpreter uses 
setjmp/longjmp to implement Try/Catch) - there's potentially a lot of 
cleaning up you have to do internally when you reach the Catch to make sure 
that everything is dereferenced properly.

-- David Cuny