Re: ptr<X> versus const ptr<X>&
Markus Moll wrote:
Ulrich Eckhardt wrote:
Sorry, but I beg to differ. The whole 'checked STL' idea is about giving
a proper diagnostic for things that the C++ standard only calls
'undefined'.
Yes, but that only works if your implementation gives you some guarantees
about that. And then it is not portable code any more. Don't misunderstand
me: If that's fine for you, it's fine for me. But in general, such
assertions are completely pointless.
You mean that
class vector {
T const& operator[](size_type i) const {
assert(i<size);
return *(begin()+i);
}
...
};
is useless or not portable? Note that in this case, no undefined behaviour
occurs when this function is called with an invalid index and NDEBUG is not
defined. In the case that the OP used, that UB has already occurred when it
is detected via some implementation-specific means.
Uli
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