[boost] sub string and string algo.

From: Alexei Novakov (alexei_novakov_at_[hidden])
Date: 2002-11-21 14:48:09

"Vincent Finn" <vincent_finn_at_[hidden]> wrote in message
news:3DDCBE58.3040701_at_agilent.com...
> Alexei Novakov wrote:
> > "Vincent Finn" <vincent_finn_at_[hidden]> wrote in message
> > news:3DDB6C2E.9090809_at_agilent.com...
> >
> >>Forwarded to main Boost list - that's the more appropriate venue for
> >>discussions of possible additions.
> >>
> >>-- Jim Hyslop boost-users moderator.
> >>
> >> > -----Original Message-----
> >> > From: alexei_novakov [mailto:alexei_novakov_at_[hidden]]
> >> > Sent: Monday, November 18, 2002 7:05 PM
> >> > To: Boost-Users_at_[hidden]
> >> > Subject: [Boost-Users] Possible boost addition: sub string and const
> >> > string.
> >> >
> >> >
> >> > Hello everyone.
> >> >
> >> > I have two classes which I found pretty handy: sub_string (behaves as
> >> > a mirror of the portion of master basic_string) and const_string (C-
> >> > string wrapper). Nice thing about these two is they implemented as
> >> > template specialization of basic_string which has advantages:
> >> > a) familiar interface;
> >> > b) possibility to reuse the code written for basic_string (like
> >> > string streams, lexical casts, etc).
> >> >
> >> > Any interest?
> >> >
> >> > Regards.
> >> >
> >> > Alexei Novakov
> >>
> >>Sounds interesting, like slice on a valarray
> >>
> >>When I have to do a lot of manipulation of sub string and can't afford
> >>to copy back and forward I normally resort to using vector<char>; this
> >>sounds a lot handier
> >>
> >>How does it work ?
> >>
> >>Vin
> >>
> >
> >
> > The idea is simple. Sub string is declared as basic_string template
> > specialization:
> >
> > template <typename CHAR, typename TRAITS, typename ALLOCATOR>
> > class basic_string<CHAR, TRAITS, basic_string<CHAR, TRAITS, ALLOCATOR> >
> >
> > The interfase is the same as for basic_string (except constructors). Sub
> > string instances contain reference to master string and boundaries
(start
> > and size). One can use it like this:
> >
> > // Start
> > typedef basic_string<string::value_type, string::traits_type, string>
> > sub_string;
> >
> > string str("1234567890");
> > sub_string ss(str, 2, 5); // master string, start position, size
> >
> > assert(lexical_cast<int>(ss) == 34567);
> >
> > ss = "$$";
> >
> > assert(str == "12$$890");
> > // End
> >
> > All the basic_string operators (like +, ==, !=, <, >, <=, >=) are
overloaded
> > to be used for both strings and sub strings.
> >
> > Similar approach is used for const_string (C string wrapper), but only
const
> > methods of basic_string are implemented.
> >
> > 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.