Support quoted variable in pull()

[msberends]

In dplyr, quoted variables also work in pull(), which makes it easy to combine with earlier set variables in code.

mtcars %>% dplyr::pull("mpg")
#>  [1] 21.0 21.0 22.8 21.4 18.7 18.1 14.3 24.4 22.8 19.2 17.8 16.4 17.3 15.2 10.4 10.4 14.7 32.4 30.4 33.9 21.5 15.5 15.2 13.3 19.2 27.3 26.0 30.4
#> [29] 15.8 19.7 15.0 21.4

Suggested change supports this.

[nathaneastwood]

I actually wonder whether this function should make use of select_positions() to be honest.

[nathaneastwood]

I remembered that I added the deparse_var() function for this kind of purpose. Thanks for the input @msberends.

[msberends]

I'm afraid it does not work:

to_select <- "mpg"
mtcars %>% pull(to_select)

[nathaneastwood]

I wouldn’t expect that to work to be honest. But

mtcars %>% pull("mpg")

Now does work

[nathaneastwood]

The reason it doesn't work (currently) is that pull is not aware of the context in which to_select is defined.

[nathaneastwood]

Actually, testing your PR, it does work. Let me take another look at it.