Assert input is logical — assert_logical • assertions

Assert an R object is 'logical' (TRUE/FALSE). Works for vector and matrix objects. To assert an object is specifically a logical vector see assert_logical_vector()

Usage

assert_logical(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 logical
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 logical, otherwise aborts with the error message specified by msg

Examples

try({
assert_logical(TRUE) # Passes
assert_logical(c(TRUE, FALSE, TRUE)) # Passes
assert_logical(c("a", "b")) # Throws default error
assert_logical(1:3, "Custom error message") # Throws custom error
})
#> Error in eval(expr, envir) : 
#>   'c("a", "b")' must be logical, not a character