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use std::fmt;

pub struct HexSlice<'a>(&'a [u8]);

impl<'a> HexSlice<'a> {
    pub fn new<T>(data: &'a T) -> HexSlice<'a>
    where
        T: ?Sized + AsRef<[u8]> + 'a,
    {
        HexSlice(data.as_ref())
    }
}

impl<'a> fmt::Display for HexSlice<'a> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        for byte in self.0 {
            write!(f, "{:02x}", byte)?;
        }

        Ok(())
    }
}

impl<'a> fmt::Debug for HexSlice<'a> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "\"{}\"", self)
    }
}