exception throw and handle and resume

[Rahul]

Hi Everyone,

I have the following code,

int main()
{
bool continue1 = true;
while(continue1)
{
try
{
printf("executed\n");
throw 5;
continue1 = false;
}
catch(int)
{
printf("exception caught, and about to retry also\n");
continue1 = true;
}
}
return(0);
}

So it turns out to be a recursive throw and handling of the integer
exception. the int 5 is allocated in the stack and therefore i assume
that it is passed to the catch handler by value as a function call...
if that is the case, is it similar to recursive function call and
would cause a stack overflow?

Thanks in advance!!!

 

[Jim Langston]

Hi Everyone,

I have the following code,

int main()
{
bool continue1 = true;
while(continue1)
{
try
{
printf("executed\n");
throw 5;
continue1 = false;
}
catch(int)
{
printf("exception caught, and about to retry also\n");
continue1 = true;
}
}
return(0);
}

So it turns out to be a recursive throw and handling of the integer
exception. the int 5 is allocated in the stack and therefore i assume
that it is passed to the catch handler by value as a function call...
if that is the case, is it similar to recursive function call and
would cause a stack overflow?

Thanks in advance!!!

The entire try...catch block is completed before the next execution, so the
thrown variable is cleaned up so you won't have that issue.

 

[Rahul]

Hi Everyone,

I have the following code,

int main()
{
bool continue1 = true;
while(continue1)
{
try
{
printf("executed\n");
throw 5;
continue1 = false;
}
catch(int)
{
printf("exception caught, and about to retry also\n");
continue1 = true;
}
}
return(0);

}

So it turns out to be a recursive throw and handling of the integer
exception. the int 5 is allocated in the stack and therefore i assume
that it is passed to the catch handler by value as a function call...
if that is the case, is it similar to recursive function call and
would cause a stack overflow?

Thanks in advance!!!

Does the standard say anything about memory holding the integer 5?
As per the block scope rules, 5 (local variable) would be deallocated
in that block,
if that is the case, how is the value passed to the exception block?

 

[Pete Becker]

Does the standard say anything about memory holding the integer 5?
As per the block scope rules, 5 (local variable) would be deallocated
in that block,
if that is the case, how is the value passed to the exception block?

There's a bunch of mechansim behind the curtains. Essentially, the
compiler copies the value to someplace safe.

 

[terminator]

There's a bunch of mechansim behind the curtains. Essentially, the
compiler copies the value to someplace safe.

--
Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
(www.petebecker.com/tr1book)

the final object resulting from throw is in catch context and is
destructed by leaving the catch block(after all it is a block).

on a considerable compiler you must not get into trouble with stack
for the above snippet.

regards,
FM.