Function parse_hex

arrow-json/src/reader/tape.rs:736–741

Parse a hex character to `u8`

(b: u8)

/// Parse a hex character to `u8`
fn parse_hex(b: u8) -> Result<u8, ArrowError> {
    let digit = char::from(b)
        .to_digit(16)
        .ok_or_else(|| err(b, "unicode escape"))?;
    Ok(digit as u8)
}

#[cfg(test)]
mod tests {