#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
pub struct SourceId(pub u32);

#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub struct Span {
    pub source: SourceId,
    pub start: u32,
    pub end: u32,
}

impl Span {
    pub const fn new(source: SourceId, start: usize, end: usize) -> Self {
        Self {
            source,
            start: start as u32,
            end: end as u32,
        }
    }

    pub const fn empty(source: SourceId, offset: usize) -> Self {
        Self::new(source, offset, offset)
    }

    pub fn join(self, other: Self) -> Self {
        Self {
            source: self.source,
            start: self.start.min(other.start),
            end: self.end.max(other.end),
        }
    }
}