How to convert a pointer inside a vector back to an iterator ?

[Bonita Montero]

How can I convert a pointer inside a vector back to an iterator
so that the operation is fully optimized away ? I try to use
iterators as most as possible to have iterator debugging, but
sometimes I've to work togehter with iterator debugging.

[Alf P. Steinbach]

Don't know about "fully optimized away".

But otherwise, `v.begin() + (p - v.data())`.


- Alf

[Bonita Montero]

If the pointer is inside a register that's optimized away and
the register is considered to be the iterator object afterwards.,