[boost] Re: sub string and string algo.

From: Alexei Novakov (alexei_novakov_at_[hidden])
Date: 2002-11-22 14:03:49

"Pavol Droba" <droba_at_[hidden]> wrote in message
news:20021122085106.D5713_at_lenin.felcer.sk...
> Hi,
>
> On Thu, Nov 21, 2002 at 02:48:09PM -0500, Alexei Novakov wrote:
>
> [snip]
>
>  > > Alexei.
> > >
> > > Cool, I'd definitely use it
> > > Seeing as there is a move to submit a library of string helpers at the
> > > moment it might be worth submitting this at the same time!
> > >
> > > Vin
> > >
> >
> > I think that these two libs (sub_string and string_algo) could  benefit
from
> > each other. How do I share the code so that members could see it and try
it?
> >
> > Alexei.
> >
>
> I'm working on the string_algo library. It has a different orientation in
some way,
> but I think there are places in which these two libs can benefit from each
other.
>
> There is the boost sandbox cvs and you can read about it from boost web
page.
> If you gain access to is, you can have a look into my string_algo lib.
>
> Then we can maybe try to find out where we could join our efforts.
>
> Regards,
>
> Pavol
>

Oh yes, I did so some time ago and played with string_algo. It seams to me
that more convenient and natural return type for kinds of trimmers and
sub_string extractors would be dedicated sub_string class rather than pair
of iterators. You are using a little bit different approach - your
algorithms are sequence oriented rather than string oriented. On one hend
string is a sequence of chars, but on the other there is a good reason why
dedicated string class was introduced instead of vector<char>. Consider the
code:

string str("   ***123   ");
sub_string ss = trim(str); // ss == "***123", but no allocation is done yet.
// work with ss as with basic_string.
// We need to do another trim.
ss = left_trim(ss, "*"); //  ss == "123", still no allocation.
// Let's create real string now;
string str1 = ss; // str1 == "123"

sub_string is not really usable without a good set of string oriented
algorithms, as well as algorithms look pretty bulky without being backed up
by good utility classes.

What do you think?

Alexei.