Mem_Parser 0.1.0

Zero-copy log parser with mmap input, streaming lines, and optional bump arena AST
Documentation 
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//! Byte ranges into the original source (zero-copy views).

/// Inclusive-exclusive byte span into UTF-8 source text `[start, end)`.
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub struct Span {
    pub start: usize,
    pub end: usize,
}

impl Span {
    #[inline]
    pub fn slice_in<'src>(self, whole: &'src str) -> Option<&'src str> {
        whole.get(self.start..self.end)
    }

    #[inline]
    pub fn len(&self) -> usize {
        self.end.saturating_sub(self.start)
    }

    #[inline]
    pub fn is_empty(&self) -> bool {
        self.start >= self.end
    }
}