rlang
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dots_n() should take into account splicing
And return NA
if it detects splicing?
and take a .ignore_empty
argument.
Related to #415
Related to the issue of caching the result of !!!
#1032. Can we cache the results at the splic site rather than at the capture site? Then this would only trigger one !!!
evaluation, which is ideal:
if (dots_n(...)) list2(...)