Re: [Boost-Users] Re: [BGL] Best way to abort an algorithm from withi n a visitor?

From: Jeremy Siek (jsiek_at_[hidden])
Date: 2002-09-19 12:59:46

Here's what went on in my head when I thought about this issue:

Performance
===========
Throw
   +main execution path of algorithm is fast
   -have to leave exception handling turned on
Return flag
   -insert if's throughout main execution path, causes slowdowns
   +can turn off exception handling

I haven't done any experiments to compare the above, but since people
shouldn't be turning off exception handling anyways, and some compilers
do a decent job w.r.t. performance with exception handling, I think this
is in favor of throwing.

Code Clarity
============
Throw
    + algorithm code is uncluttered
Return flag
    - if's in the algorithm code add clutter to sometimes already
       complicated algorithm.

Here, the adv. is cleary for throw.

So I went with throw.

Cheers,
Jeremy

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 Jeremy Siek                          http://php.indiana.edu/~jsiek/
 Ph.D. Student, Indiana Univ. B'ton   email: jsiek_at_[hidden]
 C++ Booster (http://www.boost.org)   office phone: [phone]
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