throw exception();

[Dave]

Josuttis states that I may not throw an exception of type exception or of
one of the standard exception types used for language support. Where in the
Standard am I forbidden from "throw exception();"?

Thanks,
Dave

 

[Roy Schestowitz]

Josuttis states that I may not throw an exception of type exception or of
one of the standard exception types used for language support. Where in
the Standard am I forbidden from "throw exception();"?

I think the following will explain to you about all the exception types.

http://www.cplusplus.com/doc/tutorial/tut5-3.html

 

[Sebastian Redl]

Dave wrote:

I think the following will explain to you about all the exception types.

http://www.cplusplus.com/doc/tutorial/tut5-3.html

There are some things in this document I'd like to point out.
First, not really relevant to the topic at hand, that it uses <iostream.h>,
when it really should use <iostream>.

Second, and more importantly, it's got the wrong reason listed for when a
bad_exception is thrown. The document claims it's when "an exception
doesn't match any catch". This is wrong. The exception is thrown when an
exception doesn't match an explicit throws clause:
void foo() throws (std::runtime_error)
{
throw std::length_error();
}

I'm not sure why Josuttis would state that you MAY NOT throw a plain
std::exception - as far as I'm aware, nothing in the standard says so. But
you SHOULD NOT throw a plain std::exception, simply because it holds no
further information to the cause of the error. Always be as specific as is
reasonable.