utils/src/idgen.rs


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#[derive(Debug)]
pub struct IdGen {
    next: u64,
}

impl IdGen {
    pub fn new(start: u64) -> Self {
        IdGen { next: start }
    }

    pub fn gen(&mut self) -> u64 {
        let res = self.next;
        self.next += 1;
        res
    }
}