refactor: Use std::span over Span #29119

1. 
   maflcko commented at 11:36 pm on December 19, 2023: member

   std::span allows static extents, which is a nice benefit over just Span.

   However, the interface of the two isn’t identical and requires some more changes than just defining an alias. This is my current draft to compile with std::span. This should be the minimal changes required to get a green CI, but the changes may not be ideal, so this remains a draft.

   Also, this requires and is based on #29071.

   In the meantime, changes that make sense on their own, can be split up.

2. 
   DrahtBot commented at 11:36 pm on December 19, 2023: contributor

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3. DrahtBot added the label Refactoring on Dec 19, 2023
4. DrahtBot added the label CI failed on Dec 20, 2023
5. in src/span.h:13 in 1745cf8118 outdated

    7@@ -8,7 +8,9 @@
    8 #include <algorithm>
    9 #include <cassert>
   10 #include <cstddef>
   11+#include <span>
   12 #include <type_traits>
   13+#include <span>
   

   ---

   ---

   

   obrusvit commented at 11:08 pm on December 20, 2023:

   double include
6. DrahtBot added the label Needs rebase on Dec 21, 2023
7. maflcko force-pushed on Dec 22, 2023
8. DrahtBot removed the label Needs rebase on Dec 22, 2023
9. maflcko force-pushed on Jan 3, 2024
10. maflcko force-pushed on Jan 12, 2024
11. maflcko force-pushed on Jan 18, 2024
12. DrahtBot added the label Needs rebase on Feb 1, 2024
13. maflcko force-pushed on Feb 1, 2024
14. maflcko force-pushed on Feb 1, 2024
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16. maflcko force-pushed on Feb 2, 2024
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18. maflcko force-pushed on Jun 5, 2024
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20. maflcko force-pushed on Jun 10, 2024
21. DrahtBot added the label Needs rebase on Jun 12, 2024
22. maflcko force-pushed on Jul 19, 2024
23. DrahtBot removed the label Needs rebase on Jul 19, 2024
24. DrahtBot added the label Needs rebase on Aug 28, 2024
25. 
    jonatack commented at 8:01 pm on August 28, 2024: member

    Concept ACK, provided we’re migrating to std::span.
26. maflcko force-pushed on Aug 30, 2024
27. 
    maflcko commented at 8:34 am on August 30, 2024: member

    Next step would be https://github.com/bitcoin-core/leveldb-subtree/issues/44
28. maflcko force-pushed on Aug 30, 2024
29. DrahtBot removed the label Needs rebase on Aug 30, 2024
30. maflcko force-pushed on Sep 2, 2024
31. maflcko force-pushed on Sep 2, 2024
32. refactor: Avoid needless, unsafe c-style cast b50a210268
33. std::span WIP NOMERGE 6e1b4b1a77
34. maflcko force-pushed on Oct 10, 2024

Contributors
maflcko DrahtBot obrusvit jonatack

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Refactoring CI failed