dat 1.5.0

DAT - Distributed Access Token
Documentation 
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use std::borrow::Cow;
use std::fmt::Display;
use std::str::FromStr;

pub trait Kid: Clone + PartialEq + Display + FromStr {
    fn to_kid_string(&self) -> Cow<'_, str>;
}

impl Kid for u64 {
    fn to_kid_string(&self) -> Cow<'_, str> {
        // u64는 문자열로 변환이 필요하므로 Owned (할당 발생)
        Cow::Owned(itoa::Buffer::new().format(*self).to_string())
    }
}
impl Kid for String {
    fn to_kid_string(&self) -> Cow<'_, str> {
        Cow::Borrowed(self)
    }
}