Boost logo

Boost :

From: Iain.Hanson_at_[hidden]
Date: 2001-07-31 11:20:58

Author: williamkempf (williamkempf_at_[hidden]) at unix,mime
Date: 30/07/01 20:19

>I'm interested in this library, and if help is needed I'll lend what
>ever time I can spare. My comments on the document:

Thanks. All help is greatly appreciated.
>* Exceptions should not be used for precondition violations.
>Assertions and/or error returns should be used instead in this

Why? I would not be inclined to use error returns for precondition
violation. I've not seen much of a discussion of assertion v
exceptions, however, I would be inclined to use assertions for
static preconditions and would prefer to generate a compile time
error. But for dynamic preconditions I owuld use an exception so
that the user can take some recovery action.

>* One thing I often see done wrong when it comes to "reducing
>preconditions" is overloading methods that connect a socket for
>numerous ways of specifying the address/port pair. There should be
>two seperate object types, InetAddress and InetPort (pick your name
>for these) that can be constructed with the various options such as
>URL, IP, friendly name, etc. The connection routines should only
>take these as parameters. This vastly simplifies much of the user
>coding, as well as maintenance required if some new way of
>specifying these comes into existence later.

I had planned to have an address type but I'm not sure that we need a
port type. A port is a Transport Selector and is usually an integral
type. I agree that address will be constructable in many differing
ways and that a connection would only be creatable with an address.
>* I don't think FTP, HTTP or other protocol client/server classes
>should even be considered for inclusion, at least in a first

I think these, and other applications level protocols would make a
useful addition to boost. They would need to be built ontop of the
other layer(s) and I don't plan to look to closely at them any time
in the near future. Except perhaps as examples of applications that
should be *relatively* easy to implemnt with this library.


Visit our website at

This message contains confidential information and is intended only
for the individual named. If you are not the named addressee you
should not disseminate, distribute or copy this e-mail. Please
notify the sender immediately by e-mail if you have received this
e-mail by mistake and delete this e-mail from your system.

E-mail transmission cannot be guaranteed to be secure or error-free
as information could be intercepted, corrupted, lost, destroyed,
arrive late or incomplete, or contain viruses. The sender therefore
does not accept liability for any errors or omissions in the contents
of this message which arise as a result of e-mail transmission. If
verification is required please request a hard-copy version. This
message is provided for informational purposes and should not be
construed as a solicitation or offer to buy or sell any securities or
related financial instruments.

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