compose validate

[gregouar]

Hello,

I was wondering if it would be possible to allow to compose validates?
I know I can always create a new function and call all sub-validators (maybe including the builtin ones?), but it feels to me like it would be a very nice QOL to be able to do:

#[nutype(
    sanitize(trim),
    validate(with = is_alphanumeric, error=anyhow::Error),
    validate(not_empty, len_char_max = 20),
    derive(Deserialize, Serialize, Debug, PartialEq, Clone, Deref, FromStr)
)]
pub struct Name(String);

Alternatively, it would be nice to be able to compose types (but of course that cannot work since I'm expected to give a String, not a Nutype):

#[nutype(
    validate(with = is_alphanumeric, error=anyhow::Error),
    derive(Deserialize, Serialize, Debug, PartialEq, Clone, Deref, FromStr)
)]
pub struct AlphanumericString(String);

#[nutype(
    sanitize(trim),
    validate(not_empty, len_char_max = 20),
    derive(Deserialize, Serialize, Debug, PartialEq, Clone, Deref, FromStr)
)]
pub struct Name(AlphanumericString);