numid 0.2.9

A macro for generating structures which behave like numerical id.
Documentation 
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mod module {
    use numid::numid;
    numid!(pub struct TestPublic);
    numid!(struct TestPrivate);
}

fn main() {
    let _npu = module::TestPublic::new();
    let _npr = module::TestPrivate::new(); //~ ERROR struct `TestPrivate` is private
}