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This release implements submdspan with customizations points as approved by ISO C++ LEWG. It also reworks the implementation of extents, to reduce code complexity and improve compile time.
This is the last version with support for C++14. It does not yet include the reworked submdspan functionality with customization points to allow submdspan to work for custom layouts.
This is a faithful implementation of the ISO C++ proposal P0009 with merged P2553 (size_type argument for extents) and P2554 (deduction guide from C-Array). It does not yet have the proposed renames done (P2599/P2604).
This is the last release before we merge the C++ committee change described in P2553 (https://wg21.link/p2553). This introduces a mandatory template parameter to extents to set the size type (index type). Note this is a backward breaking change...
This release represents MDSPAN P0009R14 as approved for electronic polling for forwarding to LWG review, by the ISO C++ Committee LEWG in November 2021.