Add Joaquín's 2026Q2 update

Author: joaquintides

_posts/2026-07-01-Joaquins2026Q2Update.md

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+---
+layout: post
+nav-class: dark
+categories: joaquin
+title: Hub is here
+author-id: joaquin
+author-name: Joaquín M López Muñoz
+---
+
+During Q2 2026, I've been working in the following areas:
+
+### `boost::container::hub`
+
+The Boost official review took place April 16-26. The library
+[was accepted](https://lists.boost.org/archives/list/boost@lists.boost.org/thread/7WZ7QTPE2YDYD5OYCKXKKV2N74JHJRZL/)
+as part of Boost.Container. Many thanks to the review manager, Ion Gaztañaga, and all the people who participated:
+Arnaud Becheler, Matt Bentley, Matt Borland, Dominique Devienne, Peter Dimov, Emil Dotchevski,
+Alexander Grund, Andrzej Krzemieński, Christian Mazakas, Peter Turcan. 
+During April-June I implemented the feedback received ([PR#20](https://github.com/joaquintides/hub/pull/20)),
+and after that Ion took over and migrated the code and 
+[documentation](https://www.boost.org/doc/libs/develop/doc/html/container/non_standard_containers.html#container.non_standard_containers.hub)
+to Boost.Container (including backporting to C++03 and some interesting performance improvements
+that I helped a bit with). `boost::container::hub` will be released in Boost 1.92
+(August 2026), after which the [original repo](https://github.com/joaquintides/hub) will be
+deprecated or removed.
+
+### Boost.Unordered
+
+* Added interoperability with C++20 ranges to all the containers in the library
+([PR#355](https://github.com/boostorg/unordered/pull/355)).
+* Reviewed and merged [PR#348](https://github.com/boostorg/unordered/pull/348)
+from Daniel Král (performance issue with closed-addressing containers when rehashing
+at very large container sizes).
+* Written maintenance fixes
+[PR#346](https://github.com/boostorg/unordered/pull/346),
+[PR#351](https://github.com/boostorg/unordered/pull/351),
+[PR#352](https://github.com/boostorg/unordered/pull/352),
+[PR#353](https://github.com/boostorg/unordered/pull/353),
+[PR#354](https://github.com/boostorg/unordered/pull/354).
+* Addressed documentation issues
+[#349](https://github.com/boostorg/unordered/issues/349),
+[#350](https://github.com/boostorg/unordered/issues/350).
+ 
+### Boost.MultiIndex
+
+* Fancy pointer support has been extended so that `multi_index_container`
+iterators now store references to the elements through the allocator's pointer type
+([PR#100](https://github.com/boostorg/multi_index/pull/100)).
+In particular, this means that iterators can now be placed in shared memory using
+Boost.Interprocess allocators.
+* Reviewed and merged [PR#94](https://github.com/boostorg/multi_index/pull/94)
+from Daniel Král (performance issue when rehashing at very large container sizes).
+* Reviewed and merged [PR#98](https://github.com/boostorg/multi_index/pull/98)
+from Jonathan Wakely.
+* Written maintenance fixes
+[PR#97](https://github.com/boostorg/multi_index/pull/97),
+[PR#99](https://github.com/boostorg/multi_index/pull/99).
+
+### Boost.ICL
+
+As discussed in a [previous entry](https://cppalliance.org/joaquin/2026/04/02/Joaquins2026Q1Update.html#boosticl),
+recent changes in libc++ v2 broke this library. These changes are related to the fact
+that non-heterogeneous lookup for associative containers is poorly specified in
+the C++ standard. I filed a [LWG issue](https://cplusplus.github.io/LWG/issue4572) and
+defended a resolution with the LWEG that was consistent with the original semantic
+assumptions of Boost.ICL, but this resolution was not accepted (Brno, May 10).
+There was a fix on hold ([PR#54](https://github.com/boostorg/icl/pull/54)) pending
+acceptance from ICL's maintainer, but he's been unavailable and in the end I requested
+write permission to the repo and merged the PR so that it makes it in time for
+Boost 1.92. The PR includes some additional fixes not related to the core issue.
+
+### Boost.Bloom
+
+* Reviewed and merged [PR#46](https://github.com/boostorg/bloom/pull/46)
+from Jonathan Wakely.
+* Written maintenance fix
+[PR#47](https://github.com/boostorg/bloom/pull/47).
+
+### Boost.Graph
+
+I had the honor to participate remotely in the [Boost.Graph Workshop](https://github.com/boostorg/graph/discussions/466)
+held in Paris, May 6, where I presented some simple ideas towards
+[modernization of BGL API](https://github.com/user-attachments/files/28546328/JoaquinMunozLopez-BGL.API.pain.points.and.modernization.ideas.pdf).
+
+### Support to the community
+
+* I've been helping a bit with Mark Cooper's very successful
+[Boost Blueprint](https://x.com/search?q=%22Boost%20Blueprint%22&src=typed_query&f=live)
+series on X. 
+* Supporting the community as a member of the Fiscal Sponsorship Committee (FSC).