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Subject: Re: [boost] [shared_array] Why not in C++11 ?
From: Sid Sacek (ssacek_at_[hidden])
Date: 2013-07-07 18:57:16

Peter Dimov wrote:
> > > Once C++14 becomes an official standard, it'd become possible for
> > > N3640 to be discussed and, hopefully, accepted;
> >
> > Same goes for N3641, of course.
> >
> >
> I then tried to get the buffer length (in code) but hit a brick wall.
> int len = buffer.length; // doesn't exist
> int len = buffer.length(); // doesn't exist
> int len = buffer.capacity; // doesn't exist
> int len = buffer.capacity(); // doesn't exist
> int len = buffer.size; // doesn't exist
> int len = buffer.size(); // doesn't exist
> Unless I'm not using the object correctly, not being able to retrieve the array's capacity is a major oversight in my opinion.
> As a library developer, I want to be passed buffers in this fashion, and know how much data a buffer can hold. Having to guess is not what I was hoping for. Both Java and C# allow you to do this, so why not C++ buffers.
> -Sid

I thought about it a little, and I guess I could write a wrapper class around shared_ptr<> to provide buffering features.

class shared_buffer : public shared_ptr< unsigned char [] >
        size_t capacity;

Does this type of object not already exist in boost? Am I the only coder who wants this sort of thing?

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