use crate::ir::ir_variable::IrVariableId;
use crate::ir::register_allocation::VrUser;
use std::collections::HashSet;
use std::fmt::{Display, Formatter};

pub struct IrReadField {
    field_ref_variable: IrVariableId,
}

impl IrReadField {
    pub fn new(field_ref_variable: IrVariableId) -> Self {
        Self { field_ref_variable }
    }

    pub fn field_ref_variable(&self) -> IrVariableId {
        self.field_ref_variable
    }
}

impl VrUser for IrReadField {
    fn vr_uses(&self) -> HashSet<IrVariableId> {
        HashSet::from([self.field_ref_variable])
    }
}

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