Re: Yet Another Container: DynamicArray

From: Gavin Lambert (boost_at_[hidden])
Date: 2020-01-29 03:51:41

On 25/01/2020 01:21, Glen Fernandes wrote:
> Heap storage, fixed size at runtime:
>     allocate_unique<T[]>(alloc, size, ...)
> 
>   Gives users everything they need for buffers. (They don't need a Container
> that is copyable).

Not quite.  These keep the storage pointer and the storage size 
separately, so you still need a wrapper type (such as the Asio buffer 
types), or to keep passing them around separately (which is error-prone) 
or to make assumptions instead of passing it around (which is very 
error-prone).

C++20 introduces std::span, which is a good way of passing around a 
pointer and size together -- but it's non-owning, so still isn't a 
solution for the above.