Assert input is a non empty character string — assert_non_empty_string • assertions

Asserts input is a string, and nonempty (i.e. not equal to ”)

Usage

assert_non_empty_string(
  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
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_non_empty_string("a") # Passes
assert_non_empty_string("") # Fails
})
#> Error in eval(expr, envir) : 
#>   '""' is an empty string!