Rust Trait (3): TryFrom, TryInto

// Tuple implementation
impl TryFrom<(i16, i16, i16)> for Color {
    type Error = IntoColorError;
    fn try_from(tuple: (i16, i16, i16)) -> Result<Self, Self::Error> {
        let (r, g, b) = tuple;
        if r < 0 || r > 255 || g < 0 || g > 255 || b < 0 || b > 255 {
            return Err(IntoColorError::IntConversion);
        }
        Ok(Color {
            red: r as u8,
            green: g as u8,
            blue: b as u8,
        })
    }
}

/// ===== main.rs =====
let c1 = Color::try_from((183, 65, 14));
println!("{:?}", c1);
// or take slice within round brackets and use TryInto
let c4: Result<Color, _> = (&v[..]).try_into();
println!("{:?}", c4);