Boost logo

Boost :

Subject: Re: [boost] [string] proposal
From: Dean Michael Berris (mikhailberis_at_[hidden])
Date: 2011-01-28 15:54:34

On Sat, Jan 29, 2011 at 4:24 AM, Joe Mucchiello <jmucchiello_at_[hidden]> wrote:
> On Jan 28, 2011, at 12:59 PM, Dean Michael Berris wrote:
>> And I stopped before I write too much -- the initial version is
>> already up:
>> -- I'll give it more information and the actual interfaces and
>> implementation as soon as I get some Z's. :)
> Hi, I have a question. You keep saying that the string (or chain) has no
> encoding the string is "just a sequence of bytes" but that doesn't make sense.
> The bytes have to have some form of encoding otherwise how do the adapter
> classes know how to convert the sequence of bytes into an encoded
> sequence?

The adapters assume -- and a validating algorithm does the validation.
This makes adapters/views remain efficient in implementation, while
putting validation as an explicit independent algorithm dependent on
the desired encoding.

> When you say the string has no encoding do you simply mean
> the default encoding is implementation dependent? Did I miss where you
> said this somewhere?

I mean strings by themselves as a storage data structure have no
intrinsic encoding. Now if you want to build strings of a certain
encoding -- as in the byte-level encoding -- you use a builder that
knows how to do the appropriate encoding. If you take a string and
want to implement it, you compose an interpretation of the string
using a view.

I haven't pointed out the view aspect yet since I'm focusing the
document on the immutable string first. I see the encoding issue as
largely a different problem that is solvable using appropriate views
and algorithms that operate on the appropriate abstractions at a
different level.

> Oh, and I see the value in an immutable string. I just think you are still at
> such a high level that it's hard to see where you are going for some people.

Yeah, and the document after all is an initial draft anyway, it's only
going to get longer and more explicit as it goes.

Thanks for the questions/feedback, I hope this helps.

PS. so much for Z's LOL

Dean Michael Berris

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