P0122R7 <span>

[StephanTLavavej]

P0122R7 <span>
P1024R3 Enhancing span Usability
P1085R2 Removing span Comparisons
P1394R4 Range Constructor For span
P1872R0 span Should Have size_type, Not index_type

LWG-3101 span's Container constructors need another constraint
LWG-3102 Clarify span iterator and const_iterator behavior
LWG-3103 Errors in taking subview of span should be ill-formed where possible
LWG-3144 span does not have a const_pointer typedef
LWG-3198 Bad constraint on std::span::span()
LWG-3274 Missing feature test macro for <span>
LWG-3369 span's deduction-guide for built-in arrays doesn't work

This is also patched by #56, P1227R2 Signed std::ssize(), Unsigned span::size().

Feature-test macro as of WG21-N4842:
#define __cpp_lib_span 201902L

[gongminmin]

Can make use of the implementation of GSL::span :)

[AdamBucior]

I suppose that all of these proposals were implemented, so maybe they all should be listed in Changelog, not just P0122R7 (also applies to #26 and #13).

[StephanTLavavej]

@AdamBucior Good idea! I've recorded all patch papers in the Changelog, and updated the PR checklist so we'll follow this convention in the future.