Re: vector.erase(iterator iter) will change "iter" or not?

From:

James Kanze <james.kanze@gmail.com>

Newsgroups:

comp.lang.c++

Date:

Tue, 26 Feb 2008 12:39:17 -0800 (PST)

Message-ID:

<ac91af1f-f3b9-430d-ba96-d49bbe937f63@41g2000hsc.googlegroups.com>

On Feb 26, 11:31 am, Richard Herring <junk@[127.0.0.1]> wrote:

In message
<79bc8204-9fcd-4cae-808b-d6b179de1...@v3g2000hsc.googlegroups.com>,
James Kanze <james.ka...@gmail.com> writes

But physically it need not: see implementations where
vector<T>::iterator is implemented as plain T*.

It's not *required* by the STL. All of the good implementations
do it.

No doubt, if you define "good" implementations as the ones
that do it.

I define good by those which are standards conformant, and work
as advertised. Basically, Dinkumware and g++.

It's a shame they can't do the same for all the references and
pointers that also become invalidated.

That is, of course, a language issue, rather than a library
issue. The Boehm collector goes a long way in this regard, but
obviously, it can't help in cases where the memory is managed
elsewhere (e.g. in std::vector, but also things like pointers to
local variables).

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