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The improvement is that in __index_type_cast, we don't need to check at runtime if we know that _IndexType is smaller than _OIndexType. The cleanup is whitespace (overlength lines) in <mdspan>, grouping is_always_foo and is_foo together, and de-uglifying a variable in test code. libstdc++-v3/ChangeLog: * include/std/mdspan (__mdspan::__index_type_cast): Optimize by skipping a __glibcxx_assert if it's know at compile-time. (std::layout_left_padded, std::layout_righ_padded): Reorder is_always_strided and is_unique member functions. * testsuite/23_containers/mdspan/int_like.h: Rename _M_i to value. Reviewed-by: Jonathan Wakely <jwakely@redhat.com> Reviewed-by: Tomasz Kamiński <tkaminsk@redhat.com> Signed-off-by: Luc Grosheintz <luc.grosheintz@gmail.com>
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