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‘R CMD check’ now reports further ‘clang’ warnings including ‘-Wkeyword-macro’. This is most commonly seen for the C23 keywords ‘bool’, ‘true’ and ‘false’, but is also seen for ‘nullptr’ (C23 and C++11). Masking these by macros _may_ generate correct code (but not always) and always results in confusing-to-read code.
Setting ‘attributes’ on primitive functions is an error now; previously, it modified without copying, as noticed by Henrik Bengtsson on the R-devel mailing list.
‘selectMethod(f, ..)’ now keeps the function name if the function belongs to a group generic and the method is for the generic.