Re: CString help

On Sun, 24 Jun 2007 14:11:59 -0700, "Mihai N." <nmihai_year_2000@xxxxxxxxx>
wrote:

(and in fact I think I know a case where this might break: flex_string of
Andrei Alexandrescu, a very nice string class, standard compliant).

But flex_string != std::basic_string. I skimmed the DDJ article here:

http://www.ddj.com/dept/cpp/184403784

I see Andrei talked at length about "Standard-compliant" and COW. The
problem is, the two aren't compatible, at least if you think
"copy-on-write" actually means "copy-on-write".

I don't think there is any standard requirement for "copy-on-write" behavior,
that is implementation speciffic.

Of course the standard doesn't require it. What I was getting at is that
the standard does not permit COW.

for me standard-compliant is good enough. It means at any time some
compiler crator can decide to drop his implementation and adopt Andrei's
implementation.
Even the DDJ article says "a policy-based basic_string implementation"
It is an implementation, and I don't know based on what criteria one can
say that flex_string != std::basic_string

I don't know any standard library implementation that comes with
flex_string renamed to basic_string.

The standard does not provide an implementation. So if I write something
that exposes all the public behavior and methods required by the C++
standard for std::basic_string, then the class *is* std::basic_string

And you should feel free to use it. Just make sure you've observed all the
little nuances necessary to use std::string in a truly portable way.

--
Doug Harrison
Visual C++ MVP
.

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