[−][src]Function artichoke_backend::extn::stdlib::securerandom::alphanumeric
pub fn alphanumeric(len: Option<i64>) -> Result<Vec<u8, Global>, ArgumentError>
Generate a random sequence of ASCII alphanumeric bytes.
If len
is Some
and non-negative, generate a String
of len
random ASCII alphanumeric bytes. If len
is None
, generate 16 random
alphanumeric bytes.
The returned Vec<u8>
is guaranteed to contain only ASCII bytes.
Examples
let bytes = spinoso_securerandom::alphanumeric(Some(1024))?; let bytes = String::from_utf8(bytes)?; assert_eq!(bytes.len(), 1024); assert!(bytes.is_ascii()); assert!(bytes.find(|ch: char| !ch.is_ascii_alphanumeric()).is_none());
Errors
If the given length is negative, return an ArgumentError
.
If the underlying source of randomness returns an error, return a
RandomBytesError
.