Re: [Boost-users] [Range] Creating a range for a scoped_array (with known length)

Subject: Re: [Boost-users] [Range] Creating a range for a scoped_array (with known length)
From: Matthieu Brucher (matthieu.brucher_at_[hidden])
Date: 2010-11-05 06:37:09

2010/11/3 Neil Groves <neil_at_[hidden]>:
> On Wed, Nov 3, 2010 at 1:56 PM, Matthieu Brucher
> <matthieu.brucher_at_[hidden]> wrote:
>>
>> Hi,
>>
>> I have a scoped_array with some chars inside (so a
>> boost::scoped_array<char>). I want to use the string algorithms, but I
>> can't managed to get a range from the scoped_array.
>> I don't know if the data ends with a '\0' (it's received from asio
>> with a read()), so I can't rely on as_literal.
>>
>
> AFAICT boost::scoped_array only stores the array as a pointer, hence the
> size information is lost and it is not possible to obtain the end of the
> conceptual range from this class alone. boost::scoped_array is primarily
> intended to work in a similar fashion to boost::scoped_ptr but for
> allocations that require a corresponding delete[].
>
> Perhaps consider boost::array, std::string, or std::vector instead?

This is not an issue for me. I have the size of the data with me.
I can't use boost::array, std::string or std::vector because the data
may be processed by various optimized algorithms, and I don't want to
pass pointers to those functions, and not a compelx container either
(for performance purposes).

>> Is there a way of creating a Range directly with two iterators?
>>
>
> Yes, there is - boost::make_iterator_range(first, last)

I think this might be lacking in the examples. Generally, they are
based on fully-fledged containers, not iterators.

Matthieu
-- 
Information System Engineer, Ph.D.
Blog: http://matt.eifelle.com
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