Function haystack_value_is_na 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn haystack_value_is_na(
    val: *const Value,
) -> bool

True if a NA Value

Arguments

val a Value.

Returns

True, or False in which case if argument type mismatch an error is created that can be read using last_error_message

Example

let val = haystack_value_make_na();
assert!(!haystack_value_is_null(val));
assert!(haystack_value_is_na(val));

Safety

Panics on invalid input data