Keep the column attribute label in `bind_rows`

[ynsec37]

The bind_rows output miss the label of column as shown in the below

library(dplyr, warn.conflicts = FALSE)

packageVersion("dplyr")
#> [1] '1.1.4'

df1 <- tibble(x = 1:2, y = letters[1:2])
df2 <- tibble(x = 4:5, z = 1:2)

attr(df1$x, "label") <- "df1 lable x"
attr(df2$x, "label") <- "df2 lable x"


output1 <- bind_rows(list(df1, df2))
attributes(output1$x)
#> NULL

output2 <- data.table::rbindlist(list(df1, df2), use.names = TRUE, fill = TRUE) |>
  as.data.frame()
attributes(output2$x)
#> $label
#> [1] "df1 lable x"

output3 <- data.table::rbindlist(list(df2, df1), use.names = TRUE, fill = TRUE) |>
  as.data.frame()
attributes(output3$x)
#> $label
#> [1] "df2 lable x"

^{Created on 2025-02-26 with reprex v2.1.1}

[DavisVaughan]

This is intended. As a general rule we don't keep extraneous outputs unless the type itself deems them required attributes by providing vec_ptype2() and vec_cast() methods in vctrs.

x <- 1:5
attr(x, "label") <- "the label"
vctrs::vec_c(x, x)
#>  [1] 1 2 3 4 5 1 2 3 4 5

^{Created on 2025-09-08 with reprex v2.1.1}