A 1d vector of unspecified type

Source: R/unspecified.R

This is a partial type used to represent logical vectors that only contain NA. These require special handling because we want to allow NA to specify missingness without requiring a type.

unspecified(n = 0)

vec_unspecified_cast(x, to)

# S3 method for vctrs_unspecified
vec_type2(x, y)

Arguments

n

Length of vector

Details

vec_unspecified_cast() is a helper to use in your vec_cast() methods. See vignette("s3-vector") for detail.

Examples

vec_ptype()
#> Prototype: NULL
vec_ptype(NA)
#> Prototype: logical

vec_c(NA, factor("x"))
#> [1] <NA> x   
#> Levels: x
vec_c(NA, Sys.Date())
#> [1] NA           "2019-02-18"
vec_c(NA, Sys.time())
#> [1] NA                        "2019-02-18 23:28:00 UTC"
vec_c(NA, list(1:3, 4:5))
#> [[1]]
#> [1] NA
#> 
#> [[2]]
#> [1] 1 2 3
#> 
#> [[3]]
#> [1] 4 5
#>