From: Daryle Walker (darylew_at_[hidden])
Date: 2005-12-06 01:40:45
On 12/5/05 11:28 PM, "Max Motovilov" <max_at_[hidden]> wrote:
[SNIP]
> Here's my sample snippet:
>
> try {
> wave_context::iterator_type p = ctx.begin(), last_known_good = p;
> bool done = false;
>
> while( !done ) {
> try {
> done = p == ctx.end();
There's a problem with the previous line. You can't dereference "p" if
you're at the end, but you don't prevent it.
> std::cout << p->get_value();
> ++p;
> last_known_good = p;
> } catch( boost::wave::preprocess_exception& err ) {
> if( err.get_severity() >= boost::wave::util::severity_error ) throw;
> complain( err );
> p = last_known_good;
> }
> }
> } catch( boost::wave::cpp_exception& err ) {
> complain( err );
> return false;
> }
[TRUNCATE]
Maybe your problems are caused by dereference violation. Try something
like:
//========================================================================
using namespace boost::wave;
try {
typedef wave_context::iterator_type iterator;
iterator last_known_good = ctx.begin();
iterator const e = ctx.end();
for ( iterator i = last_known_good ; e != i ; )
{
try {
std::cout << i->get_value();
last_known_good = ++i;
} catch ( preprocess_exception & err ) {
if ( err.get_severity() >= util::severity_error )
throw;
complain( err );
i = last_known_good;
}
}
//...
} catch ( cpp_exception & err ) {
complain( err );
return false;
}
//========================================================================
Looking at this, I still don't see how you avoid reading the problem context
element over and over....
-- Daryle Walker Mac, Internet, and Video Game Junkie darylew AT hotmail DOT com