Functions that fabricate or repair column names

[jennybc]

Inspired by this list made by @hadley in early vctrs work, regarding type coercion across the tidyverse.

Functions where we create column names out of thin air or from inputs and could / should do so according to common principles. this list will grow as we stumble across these

• tidyr::spread()
• dplyr::inner_join() and friends
• dplyr::summarise()
• dplyr::mutate()
• tidyr::gather()
• tidyr::unnest()

[njtierney]

To add to this:

• tidyr::separate()
• tidyr::unite()

[romainfrancois]

• dplyr::bind_cols() bind_cols() needs to use new renaming scheme dplyr#3772

[krlmlr]

• dplyr::select()
• dplyr::rename()
• dplyr::transmute()
• tibble::rownames_to_column()
• tibble::rowid_to_column()
• dplyr::*_join()

[hadley]

Duplicate of #101