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Auto merge of #113325 - BoxyUwU:move_mk_methods_to_const, r=lcnr

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Replace `mk_const` with `Const::new_x` methods

Part of rust-lang/compiler-team#616. Instead of just havign `Const::new(` and nothing else I did it like this since this is more like how the `mk_x` works for `Ty`, and also another PR of mine will require changing from `Const::new(` to `Const::new_x(` anyway.

r? `@oli-bok`
This commit is contained in:
bors 2023-07-04 21:33:25 +00:00
commit f20afcc455
40 changed files with 284 additions and 191 deletions
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23
compiler/rustc_hir_analysis/src/astconv/bounds.rs
View File

@ -386,11 +386,10 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
.type_of(param.def_id)
.no_bound_vars()
.expect("ct params cannot have early bound vars");
tcx.mk_const(
ty::ConstKind::Bound(
ty::INNERMOST,
ty::BoundVar::from_usize(num_bound_vars),
),
ty::Const::new_bound(
tcx,
ty::INNERMOST,
ty::BoundVar::from_usize(num_bound_vars),
ty,
)
.into()
@ -529,13 +528,13 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
let reported = err.emit();
term = match def_kind {
hir::def::DefKind::AssocTy => tcx.ty_error(reported).into(),
hir::def::DefKind::AssocConst => tcx
.const_error(
tcx.type_of(assoc_item_def_id)
.subst(tcx, projection_ty.skip_binder().substs),
reported,
)
.into(),
hir::def::DefKind::AssocConst => ty::Const::new_error(
tcx,
reported,
tcx.type_of(assoc_item_def_id)
.subst(tcx, projection_ty.skip_binder().substs),
)
.into(),
_ => unreachable!(),
};
}

9
compiler/rustc_hir_analysis/src/astconv/mod.rs
View File

@ -482,7 +482,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
self.astconv.ct_infer(ty, Some(param), inf.span).into()
} else {
self.inferred_params.push(inf.span);
tcx.const_error_misc(ty).into()
ty::Const::new_misc_error(tcx, ty).into()
}
}
_ => unreachable!(),
@ -537,7 +537,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
.no_bound_vars()
.expect("const parameter types cannot be generic");
if let Err(guar) = ty.error_reported() {
return tcx.const_error(ty, guar).into();
return ty::Const::new_error(tcx, guar, ty).into();
}
if !infer_args && has_default {
tcx.const_param_default(param.def_id).subst(tcx, substs.unwrap()).into()
@ -546,7 +546,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
self.astconv.ct_infer(ty, Some(param), self.span).into()
} else {
// We've already errored above about the mismatch.
tcx.const_error_misc(ty).into()
ty::Const::new_misc_error(tcx, ty).into()
}
}
}
@ -1970,7 +1970,8 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
assert!(!ct.ty().has_escaping_bound_vars());
match ct.kind() {
ty::ConstKind::Bound(_, bv) => self.tcx.mk_const(
ty::ConstKind::Bound(_, bv) => ty::Const::new_placeholder(
self.tcx,
ty::PlaceholderConst { universe: self.universe, bound: bv },
ct.ty(),
),

9
compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
View File

@ -2047,11 +2047,10 @@ pub(super) fn check_type_bounds<'tcx>(
GenericParamDefKind::Const { .. } => {
let bound_var = ty::BoundVariableKind::Const;
bound_vars.push(bound_var);
tcx.mk_const(
ty::ConstKind::Bound(
ty::INNERMOST,
ty::BoundVar::from_usize(bound_vars.len() - 1),
),
ty::Const::new_bound(
tcx,
ty::INNERMOST,
ty::BoundVar::from_usize(bound_vars.len() - 1),
tcx.type_of(param.def_id)
.no_bound_vars()
.expect("const parameter types cannot be generic"),

2
compiler/rustc_hir_analysis/src/collect.rs
View File

@ -390,7 +390,7 @@ impl<'tcx> AstConv<'tcx> for ItemCtxt<'tcx> {
// left alone.
r => bug!("unexpected region: {r:?}"),
});
self.tcx().const_error_with_message(ty, span, "bad placeholder constant")
ty::Const::new_error_with_message(self.tcx(), ty, span, "bad placeholder constant")
}
fn projected_ty_from_poly_trait_ref(

7
compiler/rustc_hir_analysis/src/collect/predicates_of.rs
View File

@ -243,9 +243,12 @@ fn gather_explicit_predicates_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::Gen
let name = param.name.ident().name;
let param_const = ty::ParamConst::new(index, name);
let ct_ty = tcx.type_of(param.def_id.to_def_id()).subst_identity();
let ct_ty = tcx
.type_of(param.def_id.to_def_id())
.no_bound_vars()
.expect("const parameters cannot be generic");
let ct = tcx.mk_const(param_const, ct_ty);
let ct = ty::Const::new_param(tcx, param_const, ct_ty);
predicates.insert((
ty::ClauseKind::ConstArgHasType(ct, ct_ty).to_predicate(tcx),

2
compiler/rustc_hir_typeck/src/writeback.rs
View File

@ -840,7 +840,7 @@ impl<'cx, 'tcx> TypeFolder<TyCtxt<'tcx>> for Resolver<'cx, 'tcx> {
debug!("Resolver::fold_const: input const `{:?}` not fully resolvable", ct);
let e = self.report_error(ct);
self.replaced_with_error = Some(e);
self.fcx.tcx.const_error(ct.ty(), e)
ty::Const::new_error(self.fcx.tcx, e, ct.ty())
}
}
}

7
compiler/rustc_infer/src/infer/canonical/canonicalizer.rs
View File

@ -497,7 +497,7 @@ impl<'cx, 'tcx> TypeFolder<TyCtxt<'tcx>> for Canonicalizer<'cx, 'tcx> {
// any equated inference vars correctly!
let root_vid = self.infcx.root_const_var(vid);
if root_vid != vid {
ct = self.infcx.tcx.mk_const(ty::InferConst::Var(root_vid), ct.ty());
ct = ty::Const::new_var(self.infcx.tcx, root_vid, ct.ty());
vid = root_vid;
}
@ -804,10 +804,7 @@ impl<'cx, 'tcx> Canonicalizer<'cx, 'tcx> {
self.fold_const(bound_to)
} else {
let var = self.canonical_var(info, const_var.into());
self.interner().mk_const(
ty::ConstKind::Bound(self.binder_index, var),
self.fold_ty(const_var.ty()),
)
ty::Const::new_bound(self.tcx, self.binder_index, var, self.fold_ty(const_var.ty()))
}
}
}

2
compiler/rustc_infer/src/infer/canonical/mod.rs
View File

@ -155,7 +155,7 @@ impl<'tcx> InferCtxt<'tcx> {
CanonicalVarKind::PlaceholderConst(ty::PlaceholderConst { universe, bound }, ty) => {
let universe_mapped = universe_map(universe);
let placeholder_mapped = ty::PlaceholderConst { universe: universe_mapped, bound };
self.tcx.mk_const(placeholder_mapped, ty).into()
ty::Const::new_placeholder(self.tcx, placeholder_mapped, ty).into()
}
}
}

4
compiler/rustc_infer/src/infer/combine.rs
View File

@ -189,11 +189,11 @@ impl<'tcx> InferCtxt<'tcx> {
// HACK: equating both sides with `[const error]` eagerly prevents us
// from leaving unconstrained inference vars during things like impl
// matching in the solver.
let a_error = self.tcx.const_error(a.ty(), guar);
let a_error = ty::Const::new_error(self.tcx, guar, a.ty());
if let ty::ConstKind::Infer(InferConst::Var(vid)) = a.kind() {
return self.unify_const_variable(vid, a_error, relation.param_env());
}
let b_error = self.tcx.const_error(b.ty(), guar);
let b_error = ty::Const::new_error(self.tcx, guar, b.ty());
if let ty::ConstKind::Infer(InferConst::Var(vid)) = b.kind() {
return self.unify_const_variable(vid, b_error, relation.param_env());
}

2
compiler/rustc_infer/src/infer/freshen.rs
View File

@ -95,7 +95,7 @@ impl<'a, 'tcx> TypeFreshener<'a, 'tcx> {
Entry::Vacant(entry) => {
let index = self.const_freshen_count;
self.const_freshen_count += 1;
let ct = self.infcx.tcx.mk_const(freshener(index), ty);
let ct = ty::Const::new_infer(self.infcx.tcx, freshener(index), ty);
entry.insert(ct);
ct
}

8
compiler/rustc_infer/src/infer/generalize.rs
View File

@ -398,7 +398,7 @@ where
origin: var_value.origin,
val: ConstVariableValue::Unknown { universe: self.for_universe },
});
Ok(self.tcx().mk_const(new_var_id, c.ty()))
Ok(ty::Const::new_var(self.tcx(), new_var_id, c.ty()))
}
}
}
@ -412,7 +412,11 @@ where
substs,
substs,
)?;
Ok(self.tcx().mk_const(ty::UnevaluatedConst { def, substs }, c.ty()))
Ok(ty::Const::new_unevaluated(
self.tcx(),
ty::UnevaluatedConst { def, substs },
c.ty(),
))
}
ty::ConstKind::Placeholder(placeholder) => {
if self.for_universe.can_name(placeholder.universe) {

3
compiler/rustc_infer/src/infer/higher_ranked/mod.rs
View File

@ -94,7 +94,8 @@ impl<'tcx> InferCtxt<'tcx> {
})
},
consts: &mut |bound_var: ty::BoundVar, ty| {
self.tcx.mk_const(
ty::Const::new_placeholder(
self.tcx,
ty::PlaceholderConst { universe: next_universe, bound: bound_var },
ty,
)

27
compiler/rustc_infer/src/infer/mod.rs
View File

@ -999,7 +999,7 @@ impl<'tcx> InferCtxt<'tcx> {
}
pub fn next_const_var(&self, ty: Ty<'tcx>, origin: ConstVariableOrigin) -> ty::Const<'tcx> {
self.tcx.mk_const(self.next_const_var_id(origin), ty)
ty::Const::new_var(self.tcx, self.next_const_var_id(origin), ty)
}
pub fn next_const_var_in_universe(
@ -1013,7 +1013,7 @@ impl<'tcx> InferCtxt<'tcx> {
.borrow_mut()
.const_unification_table()
.new_key(ConstVarValue { origin, val: ConstVariableValue::Unknown { universe } });
self.tcx.mk_const(vid, ty)
ty::Const::new_var(self.tcx, vid, ty)
}
pub fn next_const_var_id(&self, origin: ConstVariableOrigin) -> ConstVid<'tcx> {
@ -1131,15 +1131,15 @@ impl<'tcx> InferCtxt<'tcx> {
origin,
val: ConstVariableValue::Unknown { universe: self.universe() },
});
self.tcx
.mk_const(
const_var_id,
self.tcx
.type_of(param.def_id)
.no_bound_vars()
.expect("const parameter types cannot be generic"),
)
.into()
ty::Const::new_var(
self.tcx,
const_var_id,
self.tcx
.type_of(param.def_id)
.no_bound_vars()
.expect("const parameter types cannot be generic"),
)
.into()
}
}
}
@ -1472,7 +1472,7 @@ impl<'tcx> InferCtxt<'tcx> {
span: Option<Span>,
) -> Result<ty::Const<'tcx>, ErrorHandled> {
match self.const_eval_resolve(param_env, unevaluated, span) {
Ok(Some(val)) => Ok(self.tcx.mk_const(val, ty)),
Ok(Some(val)) => Ok(ty::Const::new_value(self.tcx, val, ty)),
Ok(None) => {
let tcx = self.tcx;
let def_id = unevaluated.def;
@ -1964,7 +1964,8 @@ fn replace_param_and_infer_substs_with_placeholder<'tcx>(
if ty.has_non_region_param() || ty.has_non_region_infer() {
bug!("const `{c}`'s type should not reference params or types");
}
self.tcx.mk_const(
ty::Const::new_placeholder(
self.tcx,
ty::PlaceholderConst {
universe: ty::UniverseIndex::ROOT,
bound: ty::BoundVar::from_u32({

13
compiler/rustc_middle/src/infer/canonical.rs
View File

@ -443,12 +443,13 @@ impl<'tcx> CanonicalVarValues<'tcx> {
ty::Region::new_late_bound(tcx, ty::INNERMOST, br).into()
}
CanonicalVarKind::Const(_, ty)
| CanonicalVarKind::PlaceholderConst(_, ty) => tcx
.mk_const(
ty::ConstKind::Bound(ty::INNERMOST, ty::BoundVar::from_usize(i)),
ty,
)
.into(),
| CanonicalVarKind::PlaceholderConst(_, ty) => ty::Const::new_bound(
tcx,
ty::INNERMOST,
ty::BoundVar::from_usize(i),
ty,
)
.into(),
}
},
)),

8
compiler/rustc_middle/src/mir/mod.rs
View File

@ -2332,7 +2332,7 @@ impl<'tcx> ConstantKind<'tcx> {
if let Some(val) = c.kind().try_eval_for_mir(tcx, param_env) {
match val {
Ok(val) => Self::Val(val, c.ty()),
Err(guar) => Self::Ty(tcx.const_error(self.ty(), guar)),
Err(guar) => Self::Ty(ty::Const::new_error(tcx, guar, self.ty())),
}
} else {
self
@ -2344,7 +2344,9 @@ impl<'tcx> ConstantKind<'tcx> {
match tcx.const_eval_resolve(param_env, uneval, None) {
Ok(val) => Self::Val(val, ty),
Err(ErrorHandled::TooGeneric) => self,
Err(ErrorHandled::Reported(guar)) => Self::Ty(tcx.const_error(ty, guar.into())),
Err(ErrorHandled::Reported(guar)) => {
Self::Ty(ty::Const::new_error(tcx, guar.into(), ty))
}
}
}
}
@ -2510,7 +2512,7 @@ impl<'tcx> ConstantKind<'tcx> {
let generics = tcx.generics_of(item_def_id);
let index = generics.param_def_id_to_index[&def_id];
let name = tcx.item_name(def_id);
let ty_const = tcx.mk_const(ty::ParamConst::new(index, name), ty);
let ty_const = ty::Const::new_param(tcx, ty::ParamConst::new(index, name), ty);
debug!(?ty_const);
return Self::Ty(ty_const);

2
compiler/rustc_middle/src/ty/abstract_const.rs
View File

@ -53,7 +53,7 @@ impl<'tcx> TyCtxt<'tcx> {
fn fold_const(&mut self, c: Const<'tcx>) -> Const<'tcx> {
let ct = match c.kind() {
ty::ConstKind::Unevaluated(uv) => match self.tcx.thir_abstract_const(uv.def) {
Err(e) => self.tcx.const_error(c.ty(), e),
Err(e) => ty::Const::new_error(self.tcx, e, c.ty()),
Ok(Some(bac)) => {
let substs = self.tcx.erase_regions(uv.substs);
let bac = bac.subst(self.tcx, substs);

2
compiler/rustc_middle/src/ty/codec.rs
View File

@ -344,7 +344,7 @@ impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> RefDecodable<'tcx, D>
impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<D> for ty::Const<'tcx> {
fn decode(decoder: &mut D) -> Self {
let consts: ty::ConstData<'tcx> = Decodable::decode(decoder);
decoder.interner().mk_const(consts.kind, consts.ty)
decoder.interner().mk_ct_from_kind(consts.kind, consts.ty)
}
}

123
compiler/rustc_middle/src/ty/consts.rs
View File

@ -2,6 +2,7 @@ use crate::middle::resolve_bound_vars as rbv;
use crate::mir::interpret::LitToConstInput;
use crate::ty::{self, InternalSubsts, ParamEnv, ParamEnvAnd, Ty, TyCtxt};
use rustc_data_structures::intern::Interned;
use rustc_error_messages::MultiSpan;
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::LocalDefId;
@ -13,6 +14,7 @@ mod valtree;
pub use int::*;
pub use kind::*;
use rustc_span::DUMMY_SP;
pub use valtree::*;
/// Use this rather than `ConstData`, whenever possible.
@ -41,6 +43,97 @@ impl<'tcx> Const<'tcx> {
self.0.kind
}
#[inline]
pub fn new(tcx: TyCtxt<'tcx>, kind: ty::ConstKind<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
tcx.mk_ct_from_kind(kind, ty)
}
#[inline]
pub fn new_param(tcx: TyCtxt<'tcx>, param: ty::ParamConst, ty: Ty<'tcx>) -> Const<'tcx> {
Const::new(tcx, ty::ConstKind::Param(param), ty)
}
#[inline]
pub fn new_var(tcx: TyCtxt<'tcx>, infer: ty::ConstVid<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
Const::new(tcx, ty::ConstKind::Infer(ty::InferConst::Var(infer)), ty)
}
#[inline]
pub fn new_fresh(tcx: TyCtxt<'tcx>, fresh: u32, ty: Ty<'tcx>) -> Const<'tcx> {
Const::new(tcx, ty::ConstKind::Infer(ty::InferConst::Fresh(fresh)), ty)
}
#[inline]
pub fn new_infer(tcx: TyCtxt<'tcx>, infer: ty::InferConst<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
Const::new(tcx, ty::ConstKind::Infer(infer), ty)
}
#[inline]
pub fn new_bound(
tcx: TyCtxt<'tcx>,
debruijn: ty::DebruijnIndex,
var: ty::BoundVar,
ty: Ty<'tcx>,
) -> Const<'tcx> {
Const::new(tcx, ty::ConstKind::Bound(debruijn, var), ty)
}
#[inline]
pub fn new_placeholder(
tcx: TyCtxt<'tcx>,
placeholder: ty::PlaceholderConst<'tcx>,
ty: Ty<'tcx>,
) -> Const<'tcx> {
Const::new(tcx, ty::ConstKind::Placeholder(placeholder), ty)
}
#[inline]
pub fn new_unevaluated(
tcx: TyCtxt<'tcx>,
uv: ty::UnevaluatedConst<'tcx>,
ty: Ty<'tcx>,
) -> Const<'tcx> {
Const::new(tcx, ty::ConstKind::Unevaluated(uv), ty)
}
#[inline]
pub fn new_value(tcx: TyCtxt<'tcx>, val: ty::ValTree<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
Const::new(tcx, ty::ConstKind::Value(val), ty)
}
#[inline]
pub fn new_expr(tcx: TyCtxt<'tcx>, expr: ty::Expr<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
Const::new(tcx, ty::ConstKind::Expr(expr), ty)
}
#[inline]
pub fn new_error(tcx: TyCtxt<'tcx>, e: ty::ErrorGuaranteed, ty: Ty<'tcx>) -> Const<'tcx> {
Const::new(tcx, ty::ConstKind::Error(e), ty)
}
/// Like [TyCtxt::ty_error] but for constants.
#[track_caller]
pub fn new_misc_error(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
Const::new_error_with_message(
tcx,
ty,
DUMMY_SP,
"ty::ConstKind::Error constructed but no error reported",
)
}
/// Like [TyCtxt::ty_error_with_message] but for constants.
#[track_caller]
pub fn new_error_with_message<S: Into<MultiSpan>>(
tcx: TyCtxt<'tcx>,
ty: Ty<'tcx>,
span: S,
msg: &'static str,
) -> Const<'tcx> {
let reported = tcx.sess.delay_span_bug(span, msg);
Const::new_error(tcx, reported, ty)
}
/// Literals and const generic parameters are eagerly converted to a constant, everything else
/// becomes `Unevaluated`.
#[instrument(skip(tcx), level = "debug")]
@ -60,7 +153,8 @@ impl<'tcx> Const<'tcx> {
match Self::try_eval_lit_or_param(tcx, ty, expr) {
Some(v) => v,
None => tcx.mk_const(
None => ty::Const::new_unevaluated(
tcx,
ty::UnevaluatedConst {
def: def.to_def_id(),
substs: InternalSubsts::identity_for_item(tcx, def.to_def_id()),
@ -126,13 +220,19 @@ impl<'tcx> Const<'tcx> {
let generics = tcx.generics_of(item_def_id);
let index = generics.param_def_id_to_index[&def_id];
let name = tcx.item_name(def_id);
Some(tcx.mk_const(ty::ParamConst::new(index, name), param_ty))
Some(ty::Const::new_param(tcx, ty::ParamConst::new(index, name), param_ty))
}
Some(rbv::ResolvedArg::LateBound(debruijn, index, _)) => {
Some(ty::Const::new_bound(
tcx,
debruijn,
ty::BoundVar::from_u32(index),
param_ty,
))
}
Some(rbv::ResolvedArg::Error(guar)) => {
Some(ty::Const::new_error(tcx, guar, param_ty))
}
Some(rbv::ResolvedArg::LateBound(debruijn, index, _)) => Some(tcx.mk_const(
ty::ConstKind::Bound(debruijn, ty::BoundVar::from_u32(index)),
param_ty,
)),
Some(rbv::ResolvedArg::Error(guar)) => Some(tcx.const_error(param_ty, guar)),
arg => bug!("unexpected bound var resolution for {:?}: {arg:?}", expr.hir_id),
}
}
@ -155,7 +255,8 @@ impl<'tcx> Const<'tcx> {
.layout_of(ty)
.unwrap_or_else(|e| panic!("could not compute layout for {:?}: {:?}", ty, e))
.size;
tcx.mk_const(
ty::Const::new_value(
tcx,
ty::ValTree::from_scalar_int(ScalarInt::try_from_uint(bits, size).unwrap()),
ty.value,
)
@ -164,7 +265,7 @@ impl<'tcx> Const<'tcx> {
#[inline]
/// Creates an interned zst constant.
pub fn zero_sized(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Self {
tcx.mk_const(ty::ValTree::zst(), ty)
ty::Const::new_value(tcx, ty::ValTree::zst(), ty)
}
#[inline]
@ -215,8 +316,8 @@ impl<'tcx> Const<'tcx> {
pub fn eval(self, tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> Const<'tcx> {
if let Some(val) = self.kind().try_eval_for_typeck(tcx, param_env) {
match val {
Ok(val) => tcx.mk_const(val, self.ty()),
Err(guar) => tcx.const_error(self.ty(), guar),
Ok(val) => ty::Const::new_value(tcx, val, self.ty()),
Err(guar) => ty::Const::new_error(tcx, guar, self.ty()),
}
} else {
// Either the constant isn't evaluatable or ValTree creation failed.

48
compiler/rustc_middle/src/ty/context.rs
View File

@ -733,34 +733,6 @@ impl<'tcx> TyCtxt<'tcx> {
self.mk_ty_from_kind(Error(reported))
}
/// Like [TyCtxt::ty_error] but for constants, with current `ErrorGuaranteed`
#[track_caller]
pub fn const_error(self, ty: Ty<'tcx>, reported: ErrorGuaranteed) -> Const<'tcx> {
self.mk_const(ty::ConstKind::Error(reported), ty)
}
/// Like [TyCtxt::ty_error] but for constants.
#[track_caller]
pub fn const_error_misc(self, ty: Ty<'tcx>) -> Const<'tcx> {
self.const_error_with_message(
ty,
DUMMY_SP,
"ty::ConstKind::Error constructed but no error reported",
)
}
/// Like [TyCtxt::ty_error_with_message] but for constants.
#[track_caller]
pub fn const_error_with_message<S: Into<MultiSpan>>(
self,
ty: Ty<'tcx>,
span: S,
msg: &'static str,
) -> Const<'tcx> {
let reported = self.sess.delay_span_bug(span, msg);
self.mk_const(ty::ConstKind::Error(reported), ty)
}
pub fn consider_optimizing<T: Fn() -> String>(self, msg: T) -> bool {
self.sess.consider_optimizing(|| self.crate_name(LOCAL_CRATE), msg)
}
@ -1924,8 +1896,8 @@ impl<'tcx> TyCtxt<'tcx> {
}
#[inline]
pub fn mk_const(self, kind: impl Into<ty::ConstKind<'tcx>>, ty: Ty<'tcx>) -> Const<'tcx> {
self.intern_const(ty::ConstData { kind: kind.into(), ty })
pub fn mk_ct_from_kind(self, kind: ty::ConstKind<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
self.intern_const(ty::ConstData { kind, ty })
}
#[inline]
@ -1989,14 +1961,14 @@ impl<'tcx> TyCtxt<'tcx> {
ty::Region::new_early_bound(self, param.to_early_bound_region_data()).into()
}
GenericParamDefKind::Type { .. } => self.mk_ty_param(param.index, param.name).into(),
GenericParamDefKind::Const { .. } => self
.mk_const(
ParamConst { index: param.index, name: param.name },
self.type_of(param.def_id)
.no_bound_vars()
.expect("const parameter types cannot be generic"),
)
.into(),
GenericParamDefKind::Const { .. } => ty::Const::new_param(
self,
ParamConst { index: param.index, name: param.name },
self.type_of(param.def_id)
.no_bound_vars()
.expect("const parameter types cannot be generic"),
)
.into(),
}
}

6
compiler/rustc_middle/src/ty/fold.rs
View File

@ -351,7 +351,7 @@ impl<'tcx> TyCtxt<'tcx> {
self.mk_bound(ty::INNERMOST, ty::BoundTy { var: shift_bv(t.var), kind: t.kind })
},
consts: &mut |c, ty: Ty<'tcx>| {
self.mk_const(ty::ConstKind::Bound(ty::INNERMOST, shift_bv(c)), ty)
ty::Const::new_bound(self, ty::INNERMOST, shift_bv(c), ty)
},
},
)
@ -400,7 +400,7 @@ impl<'tcx> TyCtxt<'tcx> {
let index = entry.index();
let var = ty::BoundVar::from_usize(index);
let () = entry.or_insert_with(|| ty::BoundVariableKind::Const).expect_const();
self.tcx.mk_const(ty::ConstKind::Bound(ty::INNERMOST, var), ty)
ty::Const::new_bound(self.tcx, ty::INNERMOST, var, ty)
}
}
@ -475,7 +475,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for Shifter<'tcx> {
&& debruijn >= self.current_index
{
let debruijn = debruijn.shifted_in(self.amount);
self.tcx.mk_const(ty::ConstKind::Bound(debruijn, bound_ct), ct.ty())
ty::Const::new_bound(self.tcx, debruijn, bound_ct, ct.ty())
} else {
ct.super_fold_with(self)
}

8
compiler/rustc_middle/src/ty/generics.rs
View File

@ -102,9 +102,11 @@ impl GenericParamDef {
match &self.kind {
ty::GenericParamDefKind::Lifetime => ty::Region::new_error_misc(tcx).into(),
ty::GenericParamDefKind::Type { .. } => tcx.ty_error_misc().into(),
ty::GenericParamDefKind::Const { .. } => {
tcx.const_error_misc(tcx.type_of(self.def_id).subst(tcx, preceding_substs)).into()
}
ty::GenericParamDefKind::Const { .. } => ty::Const::new_misc_error(
tcx,
tcx.type_of(self.def_id).subst(tcx, preceding_substs),
)
.into(),
}
}
}

8
compiler/rustc_middle/src/ty/layout.rs
View File

@ -2,7 +2,7 @@ use crate::error::UnsupportedFnAbi;
use crate::middle::codegen_fn_attrs::CodegenFnAttrFlags;
use crate::query::TyCtxtAt;
use crate::ty::normalize_erasing_regions::NormalizationError;
use crate::ty::{self, ReprOptions, Ty, TyCtxt, TypeVisitableExt};
use crate::ty::{self, ConstKind, ReprOptions, Ty, TyCtxt, TypeVisitableExt};
use rustc_error_messages::DiagnosticMessage;
use rustc_errors::{DiagnosticBuilder, Handler, IntoDiagnostic};
use rustc_hir as hir;
@ -480,13 +480,11 @@ fn mul_sorted_consts<'tcx>(
b: ty::Const<'tcx>,
) -> Option<ty::Const<'tcx>> {
use crate::mir::BinOp::Mul;
use ty::ConstKind::Expr;
use ty::Expr::Binop;
let mut work = vec![a, b];
let mut done = vec![];
while let Some(n) = work.pop() {
if let Expr(Binop(Mul, l, r)) = n.kind() {
if let ConstKind::Expr(ty::Expr::Binop(Mul, l, r)) = n.kind() {
work.push(l);
work.push(r)
} else {
@ -517,7 +515,7 @@ fn mul_sorted_consts<'tcx>(
done.sort_unstable();
// create a single tree from the buffer
done.into_iter().reduce(|acc, n| tcx.mk_const(Expr(Binop(Mul, n, acc)), n.ty()))
done.into_iter().reduce(|acc, n| ty::Const::new_expr(tcx, ty::Expr::Binop(Mul, n, acc), n.ty()))
}
pub trait HasTyCtxt<'tcx>: HasDataLayout {

2
compiler/rustc_middle/src/ty/opaque_types.rs
View File

@ -216,7 +216,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for ReverseMapper<'tcx> {
})
.emit_unless(self.ignore_errors);
self.interner().const_error(ct.ty(), guar)
ty::Const::new_error(self.tcx, guar, ct.ty())
}
}
}

3
compiler/rustc_middle/src/ty/print/pretty.rs
View File

@ -1601,7 +1601,8 @@ pub trait PrettyPrinter<'tcx>:
}
// Aggregates, printed as array/tuple/struct/variant construction syntax.
(ty::ValTree::Branch(_), ty::Array(..) | ty::Tuple(..) | ty::Adt(..)) => {
let contents = self.tcx().destructure_const(self.tcx().mk_const(valtree, ty));
let contents =
self.tcx().destructure_const(ty::Const::new_value(self.tcx(), valtree, ty));
let fields = contents.fields.iter().copied();
match *ty.kind() {
ty::Array(..) => {

9
compiler/rustc_middle/src/ty/relate.rs
View File

@ -627,7 +627,11 @@ pub fn structurally_relate_consts<'tcx, R: TypeRelation<'tcx>>(
au.substs,
bu.substs,
)?;
return Ok(tcx.mk_const(ty::UnevaluatedConst { def: au.def, substs }, a.ty()));
return Ok(ty::Const::new_unevaluated(
tcx,
ty::UnevaluatedConst { def: au.def, substs },
a.ty(),
));
}
// Before calling relate on exprs, it is necessary to ensure that the nested consts
// have identical types.
@ -668,8 +672,7 @@ pub fn structurally_relate_consts<'tcx, R: TypeRelation<'tcx>>(
}
_ => return Err(TypeError::ConstMismatch(expected_found(r, a, b))),
};
let kind = ty::ConstKind::Expr(expr);
return Ok(tcx.mk_const(kind, a.ty()));
return Ok(ty::Const::new_expr(tcx, expr, a.ty()));
}
_ => false,
};

2
compiler/rustc_middle/src/ty/structural_impls.rs
View File

@ -730,7 +730,7 @@ impl<'tcx> TypeSuperFoldable<TyCtxt<'tcx>> for ty::Const<'tcx> {
let ty = self.ty().try_fold_with(folder)?;
let kind = self.kind().try_fold_with(folder)?;
if ty != self.ty() || kind != self.kind() {
Ok(folder.interner().mk_const(kind, ty))
Ok(folder.interner().mk_ct_from_kind(kind, ty))
} else {
Ok(self)
}

4
compiler/rustc_mir_build/src/build/expr/as_constant.rs
View File

@ -52,7 +52,7 @@ pub fn as_constant_inner<'tcx>(
match lit_to_mir_constant(tcx, LitToConstInput { lit: &lit.node, ty, neg }) {
Ok(c) => c,
Err(LitToConstError::Reported(guar)) => {
ConstantKind::Ty(tcx.const_error(ty, guar))
ConstantKind::Ty(ty::Const::new_error(tcx, guar, ty))
}
Err(LitToConstError::TypeError) => {
bug!("encountered type error in `lit_to_mir_constant`")
@ -84,7 +84,7 @@ pub fn as_constant_inner<'tcx>(
Constant { user_ty, span, literal }
}
ExprKind::ConstParam { param, def_id: _ } => {
let const_param = tcx.mk_const(ty::ConstKind::Param(param), expr.ty);
let const_param = ty::Const::new_param(tcx, param, expr.ty);
let literal = ConstantKind::Ty(const_param);
Constant { user_ty: None, span, literal }

2
compiler/rustc_mir_build/src/thir/constant.rs
View File

@ -79,5 +79,5 @@ pub(crate) fn lit_to_const<'tcx>(
_ => return Err(LitToConstError::TypeError),
};
Ok(tcx.mk_const(valtree, ty))
Ok(ty::Const::new_value(tcx, valtree, ty))
}

10
compiler/rustc_mir_build/src/thir/pattern/const_to_pat.rs
View File

@ -380,7 +380,9 @@ impl<'tcx> ConstToPat<'tcx> {
ty::Ref(_, pointee_ty, ..) => match *pointee_ty.kind() {
// `&str` is represented as a valtree, let's keep using this
// optimization for now.
ty::Str => PatKind::Constant { value: mir::ConstantKind::Ty(tcx.mk_const(cv, ty)) },
ty::Str => PatKind::Constant {
value: mir::ConstantKind::Ty(ty::Const::new_value(tcx, cv, ty)),
},
// Backwards compatibility hack: support references to non-structural types,
// but hard error if we aren't behind a double reference. We could just use
// the fallback code path below, but that would allow *more* of this fishy
@ -438,9 +440,9 @@ impl<'tcx> ConstToPat<'tcx> {
}
}
},
ty::Bool | ty::Char | ty::Int(_) | ty::Uint(_) | ty::FnDef(..) => {
PatKind::Constant { value: mir::ConstantKind::Ty(tcx.mk_const(cv, ty)) }
}
ty::Bool | ty::Char | ty::Int(_) | ty::Uint(_) | ty::FnDef(..) => PatKind::Constant {
value: mir::ConstantKind::Ty(ty::Const::new_value(tcx, cv, ty)),
},
ty::FnPtr(..) | ty::RawPtr(..) => unreachable!(),
_ => {
self.saw_const_match_error.set(true);

10
compiler/rustc_mir_build/src/thir/pattern/mod.rs
View File

@ -525,7 +525,7 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
.tcx
.const_eval_global_id_for_typeck(param_env_reveal_all, cid, Some(span))
.map(|val| match val {
Some(valtree) => mir::ConstantKind::Ty(self.tcx.mk_const(valtree, ty)),
Some(valtree) => mir::ConstantKind::Ty(ty::Const::new_value(self.tcx, valtree, ty)),
None => mir::ConstantKind::Val(
self.tcx
.const_eval_global_id(param_env_reveal_all, cid, Some(span))
@ -631,7 +631,13 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
if let Ok(Some(valtree)) =
self.tcx.const_eval_resolve_for_typeck(self.param_env, ct, Some(span))
{
self.const_to_pat(ConstantKind::Ty(self.tcx.mk_const(valtree, ty)), id, span, None).kind
self.const_to_pat(
ConstantKind::Ty(ty::Const::new_value(self.tcx, valtree, ty)),
id,
span,
None,
)
.kind
} else {
// If that fails, convert it to an opaque constant pattern.
match tcx.const_eval_resolve(self.param_env, uneval, None) {

3
compiler/rustc_symbol_mangling/src/v0.rs
View File

@ -651,7 +651,8 @@ impl<'tcx> Printer<'tcx> for &mut SymbolMangler<'tcx> {
.builtin_deref(true)
.expect("tried to dereference on non-ptr type")
.ty;
let dereferenced_const = self.tcx.mk_const(ct.kind(), pointee_ty);
// FIXME: add an assert that we only do this for valtrees.
let dereferenced_const = self.tcx.mk_ct_from_kind(ct.kind(), pointee_ty);
self = dereferenced_const.print(self)?;
}
}

4
compiler/rustc_trait_selection/src/solve/canonicalize.rs
View File

@ -377,7 +377,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for Canonicalizer<'_, 'tcx> {
// any equated inference vars correctly!
let root_vid = self.infcx.root_const_var(vid);
if root_vid != vid {
c = self.infcx.tcx.mk_const(ty::InferConst::Var(root_vid), c.ty());
c = ty::Const::new_var(self.infcx.tcx, root_vid, c.ty());
vid = root_vid;
}
@ -426,6 +426,6 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for Canonicalizer<'_, 'tcx> {
var
}),
);
self.interner().mk_const(ty::ConstKind::Bound(self.binder_index, var), c.ty())
ty::Const::new_bound(self.infcx.tcx, self.binder_index, var, c.ty())
}
}

2
compiler/rustc_trait_selection/src/solve/eval_ctxt.rs
View File

@ -915,7 +915,7 @@ impl<'tcx> EvalCtxt<'_, 'tcx> {
use rustc_middle::mir::interpret::ErrorHandled;
match self.infcx.try_const_eval_resolve(param_env, unevaluated, ty, None) {
Ok(ct) => Some(ct),
Err(ErrorHandled::Reported(e)) => Some(self.tcx().const_error(ty, e.into())),
Err(ErrorHandled::Reported(e)) => Some(ty::Const::new_error(self.tcx(), e.into(), ty)),
Err(ErrorHandled::TooGeneric) => None,
}
}

4
compiler/rustc_trait_selection/src/solve/normalize.rs
View File

@ -96,7 +96,7 @@ impl<'tcx> NormalizationFolder<'_, 'tcx> {
let recursion_limit = tcx.recursion_limit();
if !recursion_limit.value_within_limit(self.depth) {
self.at.infcx.err_ctxt().report_overflow_error(
&tcx.mk_const(uv, ty),
&ty::Const::new_unevaluated(tcx, uv, ty),
self.at.cause.span,
true,
|_| {},
@ -131,7 +131,7 @@ impl<'tcx> NormalizationFolder<'_, 'tcx> {
let ct = infcx.resolve_vars_if_possible(new_infer_ct);
ct.try_fold_with(self)?
} else {
tcx.mk_const(uv, ty).try_super_fold_with(self)?
ty::Const::new_unevaluated(tcx, uv, ty).try_super_fold_with(self)?
};
self.depth -= 1;

9
compiler/rustc_trait_selection/src/solve/project_goals.rs
View File

@ -186,11 +186,10 @@ impl<'tcx> assembly::GoalKind<'tcx> for ProjectionPredicate<'tcx> {
"missing value for assoc item in impl",
);
let error_term = match assoc_def.item.kind {
ty::AssocKind::Const => tcx
.const_error(
tcx.type_of(goal.predicate.def_id())
.subst(tcx, goal.predicate.projection_ty.substs),
guar,
ty::AssocKind::Const => ty::Const::new_error(tcx,
guar,
tcx.type_of(goal.predicate.def_id())
.subst(tcx, goal.predicate.projection_ty.substs),
)
.into(),
ty::AssocKind::Type => tcx.ty_error(guar).into(),

2
compiler/rustc_trait_selection/src/traits/auto_trait.rs
View File

@ -794,7 +794,7 @@ impl<'tcx> AutoTraitFinder<'tcx> {
unevaluated,
Some(obligation.cause.span),
) {
Ok(Some(valtree)) => Ok(selcx.tcx().mk_const(valtree, c.ty())),
Ok(Some(valtree)) => Ok(ty::Const::new_value(selcx.tcx(),valtree, c.ty())),
Ok(None) => {
let tcx = self.tcx;
let reported =

19
compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs
View File

@ -1612,16 +1612,15 @@ impl<'tcx> InferCtxtPrivExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
.tcx
.mk_projection(data.projection_ty.def_id, data.projection_ty.substs)
.into(),
ty::TermKind::Const(ct) => self
.tcx
.mk_const(
ty::UnevaluatedConst {
def: data.projection_ty.def_id,
substs: data.projection_ty.substs,
},
ct.ty(),
)
.into(),
ty::TermKind::Const(ct) => ty::Const::new_unevaluated(
self.tcx,
ty::UnevaluatedConst {
def: data.projection_ty.def_id,
substs: data.projection_ty.substs,
},
ct.ty(),
)
.into(),
};
let normalized_term =
ocx.normalize(&obligation.cause, obligation.param_env, unnormalized_term);

28
compiler/rustc_trait_selection/src/traits/project.rs
View File

@ -924,7 +924,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for BoundVarReplacer<'_, 'tcx> {
let universe = self.universe_for(debruijn);
let p = ty::PlaceholderConst { universe, bound: bound_const };
self.mapped_consts.insert(p, bound_const);
self.infcx.tcx.mk_const(p, ct.ty())
ty::Const::new_placeholder(self.infcx.tcx, p, ct.ty())
}
_ => ct.super_fold_with(self),
}
@ -1059,7 +1059,7 @@ impl<'tcx> TypeFolder<TyCtxt<'tcx>> for PlaceholderReplacer<'_, 'tcx> {
let db = ty::DebruijnIndex::from_usize(
self.universe_indices.len() - index + self.current_index.as_usize() - 1,
);
self.interner().mk_const(ty::ConstKind::Bound(db, *replace_var), ct.ty())
ty::Const::new_bound(self.infcx.tcx, db, *replace_var, ct.ty())
}
None => ct,
}
@ -1500,16 +1500,16 @@ fn project<'cx, 'tcx>(
DefKind::AssocTy | DefKind::ImplTraitPlaceholder => tcx
.mk_projection(obligation.predicate.def_id, obligation.predicate.substs)
.into(),
DefKind::AssocConst => tcx
.mk_const(
ty::ConstKind::Unevaluated(ty::UnevaluatedConst::new(
obligation.predicate.def_id,
obligation.predicate.substs,
)),
tcx.type_of(obligation.predicate.def_id)
.subst(tcx, obligation.predicate.substs),
)
.into(),
DefKind::AssocConst => ty::Const::new_unevaluated(
tcx,
ty::UnevaluatedConst::new(
obligation.predicate.def_id,
obligation.predicate.substs,
),
tcx.type_of(obligation.predicate.def_id)
.subst(tcx, obligation.predicate.substs),
)
.into(),
kind => {
bug!("unknown projection def-id: {}", kind.descr(obligation.predicate.def_id))
}
@ -2397,8 +2397,8 @@ fn confirm_impl_candidate<'cx, 'tcx>(
let term: ty::EarlyBinder<ty::Term<'tcx>> = if is_const {
let did = assoc_ty.item.def_id;
let identity_substs = crate::traits::InternalSubsts::identity_for_item(tcx, did);
let kind = ty::ConstKind::Unevaluated(ty::UnevaluatedConst::new(did, identity_substs));
ty.map_bound(|ty| tcx.mk_const(kind, ty).into())
let uv = ty::UnevaluatedConst::new(did, identity_substs);
ty.map_bound(|ty| ty::Const::new_unevaluated(tcx, uv, ty).into())
} else {
ty.map_bound(|ty| ty.into())
};

9
compiler/rustc_trait_selection/src/traits/select/confirmation.rs
View File

@ -613,11 +613,10 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
GenericParamDefKind::Const { .. } => {
let bound_var = ty::BoundVariableKind::Const;
bound_vars.push(bound_var);
tcx.mk_const(
ty::ConstKind::Bound(
ty::INNERMOST,
ty::BoundVar::from_usize(bound_vars.len() - 1),
),
ty::Const::new_bound(
tcx,
ty::INNERMOST,
ty::BoundVar::from_usize(bound_vars.len() - 1),
tcx.type_of(param.def_id)
.no_bound_vars()
.expect("const parameter types cannot be generic"),

30
compiler/rustc_ty_utils/src/consts.rs
View File

@ -33,8 +33,10 @@ pub(crate) fn destructure_const<'tcx>(
let (fields, variant) = match const_.ty().kind() {
ty::Array(inner_ty, _) | ty::Slice(inner_ty) => {
// construct the consts for the elements of the array/slice
let field_consts =
branches.iter().map(|b| tcx.mk_const(*b, *inner_ty)).collect::<Vec<_>>();
let field_consts = branches
.iter()
.map(|b| ty::Const::new_value(tcx, *b, *inner_ty))
.collect::<Vec<_>>();
debug!(?field_consts);
(field_consts, None)
@ -52,7 +54,7 @@ pub(crate) fn destructure_const<'tcx>(
for (field, field_valtree) in iter::zip(fields, branches) {
let field_ty = field.ty(tcx, substs);
let field_const = tcx.mk_const(*field_valtree, field_ty);
let field_const = ty::Const::new_value(tcx, *field_valtree, field_ty);
field_consts.push(field_const);
}
debug!(?field_consts);
@ -61,7 +63,7 @@ pub(crate) fn destructure_const<'tcx>(
}
ty::Tuple(elem_tys) => {
let fields = iter::zip(*elem_tys, branches)
.map(|(elem_ty, elem_valtree)| tcx.mk_const(*elem_valtree, elem_ty))
.map(|(elem_ty, elem_valtree)| ty::Const::new_value(tcx, *elem_valtree, elem_ty))
.collect::<Vec<_>>();
(fields, None)
@ -117,7 +119,7 @@ fn recurse_build<'tcx>(
let sp = node.span;
match tcx.at(sp).lit_to_const(LitToConstInput { lit: &lit.node, ty: node.ty, neg }) {
Ok(c) => c,
Err(LitToConstError::Reported(guar)) => tcx.const_error(node.ty, guar),
Err(LitToConstError::Reported(guar)) => ty::Const::new_error(tcx, guar, node.ty),
Err(LitToConstError::TypeError) => {
bug!("encountered type error in lit_to_const")
}
@ -125,17 +127,17 @@ fn recurse_build<'tcx>(
}
&ExprKind::NonHirLiteral { lit, user_ty: _ } => {
let val = ty::ValTree::from_scalar_int(lit);
tcx.mk_const(val, node.ty)
ty::Const::new_value(tcx, val, node.ty)
}
&ExprKind::ZstLiteral { user_ty: _ } => {
let val = ty::ValTree::zst();
tcx.mk_const(val, node.ty)
ty::Const::new_value(tcx, val, node.ty)
}
&ExprKind::NamedConst { def_id, substs, user_ty: _ } => {
let uneval = ty::UnevaluatedConst::new(def_id, substs);
tcx.mk_const(uneval, node.ty)
ty::Const::new_unevaluated(tcx, uneval, node.ty)
}
ExprKind::ConstParam { param, .. } => tcx.mk_const(*param, node.ty),
ExprKind::ConstParam { param, .. } => ty::Const::new_param(tcx, *param, node.ty),
ExprKind::Call { fun, args, .. } => {
let fun = recurse_build(tcx, body, *fun, root_span)?;
@ -145,16 +147,16 @@ fn recurse_build<'tcx>(
new_args.push(recurse_build(tcx, body, id, root_span)?);
}
let new_args = tcx.mk_const_list(&new_args);
tcx.mk_const(Expr::FunctionCall(fun, new_args), node.ty)
ty::Const::new_expr(tcx, Expr::FunctionCall(fun, new_args), node.ty)
}
&ExprKind::Binary { op, lhs, rhs } if check_binop(op) => {
let lhs = recurse_build(tcx, body, lhs, root_span)?;
let rhs = recurse_build(tcx, body, rhs, root_span)?;
tcx.mk_const(Expr::Binop(op, lhs, rhs), node.ty)
ty::Const::new_expr(tcx, Expr::Binop(op, lhs, rhs), node.ty)
}
&ExprKind::Unary { op, arg } if check_unop(op) => {
let arg = recurse_build(tcx, body, arg, root_span)?;
tcx.mk_const(Expr::UnOp(op, arg), node.ty)
ty::Const::new_expr(tcx, Expr::UnOp(op, arg), node.ty)
}
// This is necessary so that the following compiles:
//
@ -175,11 +177,11 @@ fn recurse_build<'tcx>(
// This is important so that `N as usize as usize` doesnt unify with `N as usize`. (untested)
&ExprKind::Use { source } => {
let arg = recurse_build(tcx, body, source, root_span)?;
tcx.mk_const(Expr::Cast(CastKind::Use, arg, node.ty), node.ty)
ty::Const::new_expr(tcx, Expr::Cast(CastKind::Use, arg, node.ty), node.ty)
}
&ExprKind::Cast { source } => {
let arg = recurse_build(tcx, body, source, root_span)?;
tcx.mk_const(Expr::Cast(CastKind::As, arg, node.ty), node.ty)
ty::Const::new_expr(tcx, Expr::Cast(CastKind::As, arg, node.ty), node.ty)
}
ExprKind::Borrow { arg, .. } => {
let arg_node = &body.exprs[*arg];