Function nova_rt_str_len_chars 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn nova_rt_str_len_chars(
    s: *const NovaStr,
) -> i64

Number of Unicode scalar values in s.

Separate from nova_rt_str_chars so that asking a string’s length does not allocate an array of its characters.

Safety

s must point to a valid NovaStr.