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use std::fmt::{self, Debug};
use std::hash::Hash;
pub(crate) mod tree;
pub(crate) use tree::Tree;
pub(crate) mod nfa;
pub(crate) use nfa::Nfa;
pub(crate) mod dfa;
pub(crate) use dfa::Dfa;
#[derive(Debug)]
pub(crate) struct Uninhabited;
/// An instance of a byte is either initialized to a particular value, or uninitialized.
#[derive(Hash, Eq, PartialEq, Clone, Copy)]
pub(crate) enum Byte {
Uninit,
Init(u8),
}
impl fmt::Debug for Byte {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match &self {
Self::Uninit => f.write_str("??u8"),
Self::Init(b) => write!(f, "{b:#04x}u8"),
}
}
}
pub(crate) trait Def: Debug + Hash + Eq + PartialEq + Copy + Clone {}
pub trait Ref: Debug + Hash + Eq + PartialEq + Copy + Clone {}
impl Def for ! {}
impl Ref for ! {}
#[cfg(feature = "rustc")]
pub(crate) mod rustc {
use rustc_middle::mir::Mutability;
use rustc_middle::ty;
use rustc_middle::ty::Region;
use rustc_middle::ty::Ty;
/// A reference in the layout.
#[derive(Debug, Hash, Eq, PartialEq, PartialOrd, Ord, Clone, Copy)]
pub struct Ref<'tcx> {
lifetime: Region<'tcx>,
ty: Ty<'tcx>,
mutability: Mutability,
}
impl<'tcx> super::Ref for Ref<'tcx> {}
impl<'tcx> Ref<'tcx> {
pub fn min_align(&self) -> usize {
todo!()
}
}
/// A visibility node in the layout.
#[derive(Debug, Hash, Eq, PartialEq, Clone, Copy)]
pub enum Def<'tcx> {
Adt(ty::AdtDef<'tcx>),
Variant(&'tcx ty::VariantDef),
Field(&'tcx ty::FieldDef),
Primitive,
}
impl<'tcx> super::Def for Def<'tcx> {}
}
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