Re: [boost] Re: Proposal: static_string library

From: Terje Slettebø (tslettebo_at_[hidden])
Date: 2003-03-06 23:40:03

>From: "Robert Klarer" <klarer_at_[hidden]>

> Terje Slettebø wrote:
>
> > If run-time computation is ok, and that one only wants to avoid
dynamical
> > allocation, then one might do something like I used in another posting
in
> > this thread:
> >
> > template<class CharType, int N>
> > class fixed_size_string;
> >
> > template<class CharType, int N1, int N2>
> > fixed_size_string<CharType, N1+N2> operator+(const
> > fixed_size_string<CharType, N1> &s1, const fixed_size_string<CharType,
N2>
> > &s2);
>
> An implementation of basic_string that uses the small string optimization
already
> implements something very close to this.  We don't need to specify an
entirely new
> kind of string to benefit from this technique.

True, for small strings. However, that particular technique doesn't work for
larger strings. I just mentioned the above, since it appeared that much of
the interest for static_string came from the lack of dynamical allocation,
so I wanted to point out that you don't need compile-time computation for
that.

Naturally, a compile-time string would be much less expensive to copy
around, though, since it's all encoded in the type, and there would be no
run-time cost for many operations.

Regards,

Terje