[Rd] Status of '=>'

[Dirk Eddelbuettel]

R 4.1.0 brought the native pipe and the related ability to use '=>' if one
opted into it by setting _R_USE_PIPEBIND_. I often forget about '=>' and
sadly can never find anything in the docs either (particularly no 'see als'
from '|>' docs) which is not all that heplful.

Can we anticipate a change with R 4.2.0, or will it remain as is, somewhat
available but not really documented or enabled? Clarifications welcome,
otherwise 'time will tell' as usual. 

Thanks,  Dirk

-- 
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