use std::fmt::{Debug, Display, Formatter};
use std::fmt;

use crate::asm::data::{Rd, WrData};

/// Data destination argument (read-write)
#[derive(Clone, Copy, Eq, PartialEq)]
pub struct Wr(pub WrData);

impl Wr {
    pub fn new(dst: WrData) -> Self {
        Wr(dst)
    }
    pub fn discard() -> Wr {
        Wr(WrData::Discard)
    }

    pub fn as_rd(self) -> Rd {
        Rd(self.0.into())
    }

    pub fn is_readable(self) -> bool {
        self.0.is_readable()
    }

    pub fn is_discard(self) -> bool {
        match self.0 {
            WrData::Discard => true,
            _ => false
        }
    }
}

impl From<&Wr> for Wr {
    fn from(a: &Wr) -> Self {
        *a
    }
}

impl Display for Wr {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        write!(f, "{}", self.0)
    }
}

impl Debug for Wr {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        write!(f, "Wr({})", self.0)
    }
}