Assert input is a character vector — assert_character

Assert an object is a character vector. Length 1 character vectors (strings) are considered vectors.

Usage

assert_character_vector(
  x,
  msg = NULL,
  call = rlang::caller_env(),
  arg_name = NULL
)

Arguments

x: An object
msg: A character string containing the error message to display if x is not a character vector
call: Only relevant when pooling assertions into multi-assertion helper functions. See cli_abort for details.
arg_name: Advanced use only. Name of the argument passed (default: NULL, will automatically extract arg_name).

Value

invisible(TRUE) if x is a character vector, otherwise aborts with the error message specified by msg

Examples

try({
assert_character_vector(c("a", "b", "c")) # Passes
assert_character_vector(c("a", 1, "b")) # Throws default error
assert_character_vector(matrix(c('A', 'B', 'C', 'D')))  # Throws error since type = matrix
assert_character_vector(c("a", 1, "b"), "Custom error message") # Throws custom error
assert_character_vector(glue::glue('A')) # Throws error
})
#> Error in eval(expr, envir) : 
#>   'matrix(c("A", "B", "C", "D"))' must be a character vector, not a matrix
#> and array