Hello.
Shouldn't this catch the thrown exception, since "runtime_error" is based
on "exception"? It never gets to my catch block. I'm using Borland C++
5.02.

#include <iostream>
#include <stdexcept>
using namespace std;

int main()
{
  try
    {
    throw runtime_error("Exception thrown.");
    }

  catch (exception x)
    {
    cout << x.what() << endl;
    return -1;
    }

  cout << "Everything is fine." << endl;
  return 0;
}

Thanks,
Bob Sanford
<Bob.Sanford@Compaq.com>
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"Larry Brasfield" <larrybr@earthlink.net> writes:

>Bob Sanford <Bob.Sanford@Compaq.com> wrote in article
>> Shouldn't this catch the thrown exception, since "runtime_error" is based
>> on "exception"?

Yes, it should.

>runtime_error is derived from exception.  This means that
>a runtime_error reference (pointer or C++ reference) IsA
>exception reference.  Your program would do what you expect
>if you were to write the catch as I've indicated below.
...
>//>   catch (exception x)
>>   catch (exception & x)

That's true, but it ought to do what he expects even if he
catches by value rather than catching by reference.
See 15.3[except.handle]/3.

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Bob Sanford <Bob.Sanford@Compaq.com> wrote in article
<01bc93c6$ceb027f0$256312ac@sys_bsanford>...
> Hello.
> Shouldn't this catch the thrown exception, since "runtime_error" is based
> on "exception"? It never gets to my catch block. I'm using Borland C++
> 5.02.

runtime_error is derived from exception.  This means that
a runtime_error reference (pointer or C++ reference) IsA
exception reference.  Your program would do what you expect
if you were to write the catch as I've indicated below.
[cut for length]

>   try
>     {
>     throw runtime_error("Exception thrown.");
>     }
>
//>   catch (exception x)
>   catch (exception & x)

[cut for length]

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The aforementioned views are mine alone.
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