Re: std::string exception safety guarantees?
Martin York wrote:
On Mar 14, 11:32 am, hervebronnim...@gmail.com wrote:
On Mar 8, 1:53 pm, "Bo Persson" <b...@gmb.dk> wrote:
Niels Dekker - no return address wrote:
Martin Sebor wrote:
It looks like a simple editorial issue.
I also think that there's an editorial issue here. Especially
because, as you say, chapter 21, "Strings library", explicitly
refers to the requirements from 23.1 [container.requirements].
Anyway, I would say yes, it's worth an LWG issue!
There already is an issue about basic_string claiming to be a
container, but missing a lot of the C++0x additions to containers.
http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#718
Bo Persson
Thanks all for the replies. I've forwarded this post to the
comp.std.c ++, but that moderated group isn't very active at the
moment. Bo, I agree the lwg is relevant, but it doesn't address
my point, so I think another LWG is warranted here.
Thanks all again. I'll follow up with the LWG.
--
Herve Bronnimann
According to this reference:
http://books.google.com/books?id=n9VEG2Gp5pkC&pg=PA139&lpg=PA139&dq=stl+exception+guarantees&source=web&ots=Rde7ol4cSV&sig=vllbAiDK_mLp_b-b27NCQlScHGY&hl=en#PPA140,M1
1) All STL containrs garantee they will not leak resources or
violate container invariants.
2) All array-based containers (I think string qualifies)
push and pop operation are garanteed to succeed or have no affect
(assuming 1 element at a time).
So assuming that the resize() throws trying to allocate new
resurces. Then your object should be unchanged in my opinion (but
its just an opinion).
I believe that is correct according to the current standard.
The issue #718 is about the new requirements in the revised chapter 23
of C++0x. The "Strings library" chapter makes a reference to chapter
23, and claims that basic_string fullfills all the requirements.
However, the requirements have changed, and the string has not. Then
what?
Bo Persson
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