#[macro_export(none)]
macro_rules! none {
($exp:expr) => {
match $exp {
None => {
return Err(Box::from("None Err"));
}
Some(d) => d,
}
};
}
#[macro_export(none_ref)]
macro_rules! none_ref {
($exp:expr) => {
match $exp {
None => {
return Err(Box::from("None Err"));
}
Some(ref d) => d,
}
};
}