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use std::ops::Deref;
const NULL: i32 = -1;
const MIN: i32 = 0;
#[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
pub struct ReadGroupId(Option<i32>);
impl Deref for ReadGroupId {
type Target = Option<i32>;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl From<i32> for ReadGroupId {
fn from(n: i32) -> Self {
if n < MIN {
Self(None)
} else {
Self(Some(n))
}
}
}
impl From<ReadGroupId> for i32 {
fn from(read_group: ReadGroupId) -> Self {
match *read_group {
Some(id) => id,
None => NULL,
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_from_i32_for_read_group() {
assert_eq!(*ReadGroupId::from(-1), None);
assert_eq!(*ReadGroupId::from(13), Some(13));
}
#[test]
fn test_from_read_group_for_i32() {
assert_eq!(i32::from(ReadGroupId(None)), -1);
assert_eq!(i32::from(ReadGroupId(Some(13))), 13);
}
}