datasets should drop their (readr) spec attributes?

[olivroy]

class(gtcars)
#> [1] "spec_tbl_df" "tbl_df"      "tbl"         "data.frame" 

Isn't really useful.

attr(gtcars, "spec")
attr(gtcars, "spec") <- NULL

[olivroy]

readr also adds the spec_tbl_df class to data frame. Would need to be stripped too?

[olivroy]

@rich-iannone from readr docs : using gtcars <- gtcars[] can acheive this!

readr 1.3.0 returns results with a spec_tbl_df subclass. This differs from a regular tibble only that the spec attribute (which holds the column specification) is lost as soon as the object is subset (and a normal tbl_df object is returned).

Historically tbl_df’s lost their attributes once they were subset. However recent versions of tibble retain the attributes when subetting, so the spec_tbl_df subclass is needed to ensure the previous behavior.

This should only break compatibility if you are explicitly checking the class of the returned object. A way to get backwards compatible behavior is to call subset with no arguments on your object, e.g. x[].