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|
//! Module containing the translation from stable mir constructs to the rustc counterpart.
//!
//! This module will only include a few constructs to allow users to invoke internal rustc APIs
//! due to incomplete stable coverage.
// Prefer importing stable_mir over internal rustc constructs to make this file more readable.
use crate::rustc_smir::Tables;
use rustc_middle::ty::{self as rustc_ty, Ty as InternalTy};
use rustc_span::Symbol;
use stable_mir::mir::mono::{Instance, MonoItem, StaticDef};
use stable_mir::ty::{
Binder, BoundRegionKind, BoundTyKind, BoundVariableKind, ClosureKind, Const, GenericArgKind,
GenericArgs, Region, TraitRef, Ty,
};
use stable_mir::{AllocId, CrateItem, DefId};
use super::RustcInternal;
impl<'tcx> RustcInternal<'tcx> for CrateItem {
type T = rustc_span::def_id::DefId;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
self.0.internal(tables)
}
}
impl<'tcx> RustcInternal<'tcx> for DefId {
type T = rustc_span::def_id::DefId;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
tables.def_ids[*self]
}
}
impl<'tcx> RustcInternal<'tcx> for GenericArgs {
type T = rustc_ty::GenericArgsRef<'tcx>;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
tables.tcx.mk_args_from_iter(self.0.iter().map(|arg| arg.internal(tables)))
}
}
impl<'tcx> RustcInternal<'tcx> for GenericArgKind {
type T = rustc_ty::GenericArg<'tcx>;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
match self {
GenericArgKind::Lifetime(reg) => reg.internal(tables).into(),
GenericArgKind::Type(ty) => ty.internal(tables).into(),
GenericArgKind::Const(cnst) => ty_const(cnst, tables).into(),
}
}
}
impl<'tcx> RustcInternal<'tcx> for Region {
type T = rustc_ty::Region<'tcx>;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
// Cannot recover region. Use erased instead.
tables.tcx.lifetimes.re_erased
}
}
impl<'tcx> RustcInternal<'tcx> for Ty {
type T = InternalTy<'tcx>;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
tables.types[*self]
}
}
fn ty_const<'tcx>(constant: &Const, tables: &mut Tables<'tcx>) -> rustc_ty::Const<'tcx> {
match constant.internal(tables) {
rustc_middle::mir::Const::Ty(c) => c,
cnst => {
panic!("Trying to convert constant `{constant:?}` to type constant, but found {cnst:?}")
}
}
}
impl<'tcx> RustcInternal<'tcx> for Const {
type T = rustc_middle::mir::Const<'tcx>;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
tables.constants[self.id]
}
}
impl<'tcx> RustcInternal<'tcx> for MonoItem {
type T = rustc_middle::mir::mono::MonoItem<'tcx>;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
use rustc_middle::mir::mono as rustc_mono;
match self {
MonoItem::Fn(instance) => rustc_mono::MonoItem::Fn(instance.internal(tables)),
MonoItem::Static(def) => rustc_mono::MonoItem::Static(def.internal(tables)),
MonoItem::GlobalAsm(_) => {
unimplemented!()
}
}
}
}
impl<'tcx> RustcInternal<'tcx> for Instance {
type T = rustc_ty::Instance<'tcx>;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
tables.instances[self.def]
}
}
impl<'tcx> RustcInternal<'tcx> for StaticDef {
type T = rustc_span::def_id::DefId;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
self.0.internal(tables)
}
}
#[allow(rustc::usage_of_qualified_ty)]
impl<'tcx, T> RustcInternal<'tcx> for Binder<T>
where
T: RustcInternal<'tcx>,
T::T: rustc_ty::TypeVisitable<rustc_ty::TyCtxt<'tcx>>,
{
type T = rustc_ty::Binder<'tcx, T::T>;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
rustc_ty::Binder::bind_with_vars(
self.value.internal(tables),
tables.tcx.mk_bound_variable_kinds_from_iter(
self.bound_vars.iter().map(|bound| bound.internal(tables)),
),
)
}
}
impl<'tcx> RustcInternal<'tcx> for BoundVariableKind {
type T = rustc_ty::BoundVariableKind;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
match self {
BoundVariableKind::Ty(kind) => rustc_ty::BoundVariableKind::Ty(match kind {
BoundTyKind::Anon => rustc_ty::BoundTyKind::Anon,
BoundTyKind::Param(def, symbol) => {
rustc_ty::BoundTyKind::Param(def.0.internal(tables), Symbol::intern(&symbol))
}
}),
BoundVariableKind::Region(kind) => rustc_ty::BoundVariableKind::Region(match kind {
BoundRegionKind::BrAnon => rustc_ty::BoundRegionKind::BrAnon,
BoundRegionKind::BrNamed(def, symbol) => rustc_ty::BoundRegionKind::BrNamed(
def.0.internal(tables),
Symbol::intern(&symbol),
),
BoundRegionKind::BrEnv => rustc_ty::BoundRegionKind::BrEnv,
}),
BoundVariableKind::Const => rustc_ty::BoundVariableKind::Const,
}
}
}
impl<'tcx> RustcInternal<'tcx> for TraitRef {
type T = rustc_ty::TraitRef<'tcx>;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
rustc_ty::TraitRef::new(
tables.tcx,
self.def_id.0.internal(tables),
self.args().internal(tables),
)
}
}
impl<'tcx> RustcInternal<'tcx> for AllocId {
type T = rustc_middle::mir::interpret::AllocId;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
tables.alloc_ids[*self]
}
}
impl<'tcx> RustcInternal<'tcx> for ClosureKind {
type T = rustc_ty::ClosureKind;
fn internal(&self, _tables: &mut Tables<'tcx>) -> Self::T {
match self {
ClosureKind::Fn => rustc_ty::ClosureKind::Fn,
ClosureKind::FnMut => rustc_ty::ClosureKind::FnMut,
ClosureKind::FnOnce => rustc_ty::ClosureKind::FnOnce,
}
}
}
impl<'tcx, T> RustcInternal<'tcx> for &T
where
T: RustcInternal<'tcx>,
{
type T = T::T;
fn internal(&self, tables: &mut Tables<'tcx>) -> Self::T {
(*self).internal(tables)
}
}
|
