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Subject: Re: [boost] [string] proposal
From: Dean Michael Berris (mikhailberis_at_[hidden])
Date: 2011-01-27 07:41:45

On Thu, Jan 27, 2011 at 8:09 PM, Yakov Galka <ybungalobill_at_[hidden]> wrote:
> On Thu, Jan 27, 2011 at 12:57, Dean Michael Berris
> <mikhailberis_at_[hidden]>wrote:
>> So more to the point, the real thing I want to focus on is the
>> immutable string. :)
> So isn't SGI's rope (without all the mutable interface) a good immutable
> string?

I think so... but there are some things that I think would be good to
have in a string implementation that is by design immutable. There are
certain things like:

* Interning -- similar to what the flyweight implementation does but
centers on strings and substrings
* Reference counting -- as already pointed out by others earlier on
* Lazy transformations -- which I'm not sure would fit entirely in the
way SGI's rope is described
* Simple DSEL for concatenation and layering transformations -- this
would be good for efficiency reasons and would generally influence the
internals of the implementation

That said, the memory management and data structure of the rope
internals would be a good model to follow IMO.

Dean Michael Berris

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