Boost logo

Boost :

From: BARTLETT, Peter, FM (Peter.BARTLETT_at_[hidden])
Date: 2005-08-08 08:30:08

>Alex wrote:
>Please take a look and let me know what you think.

A great start but, if I understand correctly, there is a significant
difference with how zip_iterator works.

The zip_iterator's dereference method returns a tuple of references to the
underlying values, whereas your cross_iterator just returns the tuple of
iterators themselves. Thus to use cross_iterator with standard algorithms,
the user would have to provide a function object that acts on iterators
rather than values which is unusual and unintuitive.

Thus to me it seems like cross_iterator needs to borrow much of the TMP code
from the detail of zip_iterator (assuming the community is happy with how
that class works). Conceptually the two classes only differ in the ++ and --

Pete Bartlett

The Royal Bank of Scotland plc. Registered in Scotland No 90312. Registered Office: 36 St Andrew Square, Edinburgh EH2 2YB.
Authorised and regulated by the Financial Services Authority
This e-mail message is confidential and for use by the
addressee only. If the message is received by anyone other
than the addressee, please return the message to the sender
by replying to it and then delete the message from your
computer. Internet e-mails are not necessarily secure. The
Royal Bank of Scotland plc does not accept responsibility for
changes made to this message after it was sent.
Whilst all reasonable care has been taken to avoid the
transmission of viruses, it is the responsibility of the recipient to
ensure that the onward transmission, opening or use of this
message and any attachments will not adversely affect its
systems or data. No responsibility is accepted by The Royal
Bank of Scotland plc in this regard and the recipient should carry
out such virus and other checks as it considers appropriate.
                                                                                                               Visit our websites at:

Boost list run by bdawes at, gregod at, cpdaniel at, john at