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

2010/11/3 Neil Groves :

On Wed, Nov 3, 2010 at 1:56 PM, Matthieu Brucher wrote:

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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).

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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 LinkedIn: http://www.linkedin.com/in/matthieubrucher