use memrchr() to implement cx_strrchr() when it is available

fixes regression: missing closing brace in map.h in c++ builds

resolve TODO: test C23 base-2 literals

finalize the documentation on the new hash key features

change map.h to use new CX_HASH_KEY macro

add missing docstrings

change kv-list to use new CX_HASH_KEY macro

fix using empty initializer, which is a C23 extension

(0) -1000 -300 -100 -30 -10 -8 +8 +10 tip

mercurial