Required safety checks

[Dave]

Hello all,

In general, the STL doesn't have to perform safety checks. But there are
some exceptions, and I'm trying to find as many examples as I can. For
example, vector::at() must perform checking and throw an exception if the
safety checks fail. For people who know of cases where the Standard
*requires* a check, please shout it out!

Thanks,
Dave

 

[Victor Bazarov]

In general, the STL doesn't have to perform safety checks. But there are
some exceptions, and I'm trying to find as many examples as I can. For
example, vector::at() must perform checking and throw an exception if the
safety checks fail. For people who know of cases where the Standard
*requires* a check, please shout it out!

Uh... Why don't you get a copy of the Standard and just read all the
"examples" from there. It specifies precisely which functions throw
(or may throw) what exceptions.

V

 

[E. Robert Tisdale]

In general, the STL doesn't have to perform safety checks.
But there are some exceptions
and I'm trying to find as many examples as I can.
For example, vector::at() must perform [range] checking
and throw an exception if the safety checks fail.

My GNU C++ compiler defines:

reference
operator[](size_type __n) { return *(begin() + __n); }

const_reference
operator[](size_type __n) const { return *(begin() + __n); }

You could redefine them:

reference
operator[](size_type __n) {
assert(__n < this->size()); return *(begin() + __n); }

const_reference
operator[](size_type __n) const {
assert(__n < this->size()); return *(begin() + __n); }

 

[Mike Wahler]

Hello all,

In general, the STL doesn't have to perform safety checks. But there are
some exceptions, and I'm trying to find as many examples as I can. For
example, vector::at() must perform checking and throw an exception if the
safety checks fail. For people who know of cases where the Standard
*requires* a check, please shout it out!

Gimme twenty dollars and I'll tell ya.

No, wait, if you have twenty dollars, you can purchase
your very own copy of the ISO C++ standard, and learn
about this (and many other interesting things) for yourself.
www.webstore.ansi.org Search for "14882".

-Mike