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Subject: Re: [boost] [containers] Clarifications on incomplete type support?
From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2014-09-22 16:56:02

El 22/09/2014 19:34, Mikael Persson wrote:

> [snip]
> What my problem basically boils down to is being able to have a recursive
> data structure with "back-pointers" (as iterators). Like this:

Thanks for the example. Back-pointers seem to be a very useful feature.
I've merged your pull request, added the guarantee to instantiate
iterators to containers of incomplete types and updated the recursive
container example. I don't know if more explicit guarantees should be
given both for containers and iterators. For example, this compiles:

#include <boost/container/vector.hpp>

struct I;

int main()
    static boost::container::vector<I> *p;
    return 0;

but I think it would be too much work to specify which operations work
with incomplete types. Have you found any need to support member
functions of containers of incomplete types?



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