fst_table returns a zero-row table when using ft[0, ] syntax

[MarcusKlik]

A fst_table object is expected to mimic the behavior of a data.frame. Therefore, df[0, ] syntax should return a zero-row table without an error or warning:

tmp_file <- tempfile(".fst")

# write some data
x <- data.frame(X = 1:1000, Y = sample(1:10, 1000, replace = TRUE)) %>%
  fst::write_fst(tmp_file)


# get reference to file
fst_table <- fst::fst(tmp_file)

# identical
x[1, ]
#>   X Y
#> 1 1 1
fst_table[1, ]
#>   X Y
#> 1 1 1

# should be identical
x[0, ]
#> [1] X Y
#> <0 rows> (or 0-length row.names)
fst_table[0, ]
#> Error in read_fst(meta_info$path, from = min_row, to = max_row): Parameter 'from' should have a numerical value equal or larger than 1.

# tibble's also allow zero row syntax
as_tibble(x)[0, ]
#> # A tibble: 0 x 2
#> # ... with 2 variables: X <int>, Y <int>

# as do data.table's
data.table::as.data.table(x)[0. ]
#> Empty data.table (0 rows and 2 cols): X,Y

thanks @hope-data-science for reporting!