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Auto merge of #105012 - WaffleLapkin:into, r=oli-obk

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Make `tcx.mk_const` more permissive wrt `kind` argument (`impl Into`)

r? `@oli-obk` you've asked for this >:)
This commit is contained in:
bors 2022-11-29 13:28:44 +00:00
commit e0098a5cc3
20 changed files with 86 additions and 98 deletions
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20
Cargo.lock
View File

@ -870,6 +870,12 @@ dependencies = [
"memchr",
]
[[package]]
name = "convert_case"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6245d59a3e82a7fc217c5828a6692dbc6dfb63a0c8c90495621f7b9d79704a0e"
[[package]]
name = "core"
version = "0.0.0"
@ -1060,6 +1066,19 @@ dependencies = [
"syn",
]
[[package]]
name = "derive_more"
version = "0.99.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4fb810d30a7c1953f91334de7244731fc3f3c10d7fe163338a35b9f640960321"
dependencies = [
"convert_case",
"proc-macro2",
"quote",
"rustc_version",
"syn",
]
[[package]]
name = "diff"
version = "0.1.13"
@ -3979,6 +3998,7 @@ version = "0.0.0"
dependencies = [
"bitflags",
"chalk-ir",
"derive_more",
"either",
"gsgdt",
"polonius-engine",

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

@ -147,7 +147,7 @@ impl<'tcx> InferCtxt<'tcx> {
CanonicalVarKind::PlaceholderConst(ty::PlaceholderConst { universe, name }, ty) => {
let universe_mapped = universe_map(universe);
let placeholder_mapped = ty::PlaceholderConst { universe: universe_mapped, name };
self.tcx.mk_const(ty::ConstKind::Placeholder(placeholder_mapped), ty).into()
self.tcx.mk_const(placeholder_mapped, ty).into()
}
}
}

14
compiler/rustc_infer/src/infer/combine.rs
View File

@ -753,7 +753,7 @@ impl<'tcx> TypeRelation<'tcx> for Generalizer<'_, 'tcx> {
origin: var_value.origin,
val: ConstVariableValue::Unknown { universe: self.for_universe },
});
Ok(self.tcx().mk_const_var(new_var_id, c.ty()))
Ok(self.tcx().mk_const(new_var_id, c.ty()))
}
}
}
@ -765,10 +765,7 @@ impl<'tcx> TypeRelation<'tcx> for Generalizer<'_, 'tcx> {
substs,
substs,
)?;
Ok(self.tcx().mk_const(
ty::ConstKind::Unevaluated(ty::UnevaluatedConst { def, substs }),
c.ty(),
))
Ok(self.tcx().mk_const(ty::UnevaluatedConst { def, substs }, c.ty()))
}
_ => relate::super_relate_consts(self, c, c),
}
@ -975,7 +972,7 @@ impl<'tcx> TypeRelation<'tcx> for ConstInferUnifier<'_, 'tcx> {
},
},
);
Ok(self.tcx().mk_const_var(new_var_id, c.ty()))
Ok(self.tcx().mk_const(new_var_id, c.ty()))
}
}
}
@ -988,10 +985,7 @@ impl<'tcx> TypeRelation<'tcx> for ConstInferUnifier<'_, 'tcx> {
substs,
)?;
Ok(self.tcx().mk_const(
ty::ConstKind::Unevaluated(ty::UnevaluatedConst { def, substs }),
c.ty(),
))
Ok(self.tcx().mk_const(ty::UnevaluatedConst { def, substs }, c.ty()))
}
_ => relate::super_relate_consts(self, c, c),
}

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

@ -102,7 +102,7 @@ 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_infer(freshener(index), ty);
let ct = self.infcx.tcx.mk_const(freshener(index), ty);
entry.insert(ct);
ct
}

9
compiler/rustc_infer/src/infer/higher_ranked/mod.rs
View File

@ -94,13 +94,8 @@ impl<'tcx> InferCtxt<'tcx> {
}))
},
consts: &mut |bound_var: ty::BoundVar, ty| {
self.tcx.mk_const(
ty::ConstKind::Placeholder(ty::PlaceholderConst {
universe: next_universe,
name: bound_var,
}),
ty,
)
self.tcx
.mk_const(ty::PlaceholderConst { universe: next_universe, name: bound_var }, ty)
},
};

12
compiler/rustc_infer/src/infer/mod.rs
View File

@ -1065,7 +1065,7 @@ impl<'tcx> InferCtxt<'tcx> {
}
pub fn next_const_var(&self, ty: Ty<'tcx>, origin: ConstVariableOrigin) -> ty::Const<'tcx> {
self.tcx.mk_const_var(self.next_const_var_id(origin), ty)
self.tcx.mk_const(self.next_const_var_id(origin), ty)
}
pub fn next_const_var_in_universe(
@ -1079,7 +1079,7 @@ impl<'tcx> InferCtxt<'tcx> {
.borrow_mut()
.const_unification_table()
.new_key(ConstVarValue { origin, val: ConstVariableValue::Unknown { universe } });
self.tcx.mk_const_var(vid, ty)
self.tcx.mk_const(vid, ty)
}
pub fn next_const_var_id(&self, origin: ConstVariableOrigin) -> ConstVid<'tcx> {
@ -1195,7 +1195,7 @@ impl<'tcx> InferCtxt<'tcx> {
origin,
val: ConstVariableValue::Unknown { universe: self.universe() },
});
self.tcx.mk_const_var(const_var_id, self.tcx.type_of(param.def_id)).into()
self.tcx.mk_const(const_var_id, self.tcx.type_of(param.def_id)).into()
}
}
}
@ -1580,7 +1580,7 @@ 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(ty::Const::from_value(self.tcx, val, ty)),
Ok(Some(val)) => Ok(self.tcx.mk_const(val, ty)),
Ok(None) => {
let tcx = self.tcx;
let def_id = unevaluated.def.did;
@ -2049,10 +2049,10 @@ fn replace_param_and_infer_substs_with_placeholder<'tcx>(
bug!("const `{ct}`'s type should not reference params or types");
}
tcx.mk_const(
ty::ConstKind::Placeholder(ty::PlaceholderConst {
ty::PlaceholderConst {
universe: ty::UniverseIndex::ROOT,
name: ty::BoundVar::from_usize(idx),
}),
},
ty,
)
.into()

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

@ -1087,7 +1087,7 @@ where
origin: var_value.origin,
val: ConstVariableValue::Unknown { universe: self.universe },
});
Ok(self.tcx().mk_const_var(new_var_id, a.ty()))
Ok(self.tcx().mk_const(new_var_id, a.ty()))
}
}
}

1
compiler/rustc_middle/Cargo.toml
View File

@ -8,6 +8,7 @@ edition = "2021"
[dependencies]
bitflags = "1.2.1"
chalk-ir = "0.87.0"
derive_more = "0.99.17"
either = "1.5.0"
gsgdt = "0.1.2"
polonius-engine = "0.13.0"

3
compiler/rustc_middle/src/mir/mod.rs
View File

@ -2527,8 +2527,7 @@ 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::ConstKind::Param(ty::ParamConst::new(index, name)), ty);
let ty_const = tcx.mk_const(ty::ParamConst::new(index, name), ty);
debug!(?ty_const);
return Self::Ty(ty_const);

27
compiler/rustc_middle/src/ty/consts.rs
View File

@ -76,10 +76,10 @@ impl<'tcx> Const<'tcx> {
match Self::try_eval_lit_or_param(tcx, ty, expr) {
Some(v) => v,
None => tcx.mk_const(
ty::ConstKind::Unevaluated(ty::UnevaluatedConst {
ty::UnevaluatedConst {
def: def.to_global(),
substs: InternalSubsts::identity_for_item(tcx, def.did.to_def_id()),
}),
},
ty,
),
}
@ -134,18 +134,12 @@ 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::ConstKind::Param(ty::ParamConst::new(index, name)), ty))
Some(tcx.mk_const(ty::ParamConst::new(index, name), ty))
}
_ => None,
}
}
/// Interns the given value as a constant.
#[inline]
pub fn from_value(tcx: TyCtxt<'tcx>, val: ty::ValTree<'tcx>, ty: Ty<'tcx>) -> Self {
tcx.mk_const(ConstKind::Value(val), ty)
}
/// Panics if self.kind != ty::ConstKind::Value
pub fn to_valtree(self) -> ty::ValTree<'tcx> {
match self.kind() {
@ -154,11 +148,6 @@ impl<'tcx> Const<'tcx> {
}
}
pub fn from_scalar_int(tcx: TyCtxt<'tcx>, i: ScalarInt, ty: Ty<'tcx>) -> Self {
let valtree = ty::ValTree::from_scalar_int(i);
Self::from_value(tcx, valtree, ty)
}
#[inline]
/// Creates a constant with the given integer value and interns it.
pub fn from_bits(tcx: TyCtxt<'tcx>, bits: u128, ty: ParamEnvAnd<'tcx, Ty<'tcx>>) -> Self {
@ -166,14 +155,16 @@ impl<'tcx> Const<'tcx> {
.layout_of(ty)
.unwrap_or_else(|e| panic!("could not compute layout for {:?}: {:?}", ty, e))
.size;
Self::from_scalar_int(tcx, ScalarInt::try_from_uint(bits, size).unwrap(), ty.value)
tcx.mk_const(
ty::ValTree::from_scalar_int(ScalarInt::try_from_uint(bits, size).unwrap()),
ty.value,
)
}
#[inline]
/// Creates an interned zst constant.
pub fn zero_sized(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Self {
let valtree = ty::ValTree::zst();
Self::from_value(tcx, valtree, ty)
tcx.mk_const(ty::ValTree::zst(), ty)
}
#[inline]
@ -220,7 +211,7 @@ 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) => Const::from_value(tcx, val, self.ty()),
Ok(val) => tcx.mk_const(val, self.ty()),
Err(guar) => tcx.const_error_with_guaranteed(self.ty(), guar),
}
} else {

8
compiler/rustc_middle/src/ty/consts/kind.rs
View File

@ -49,6 +49,7 @@ impl<'tcx> UnevaluatedConst<'tcx> {
/// Represents a constant in Rust.
#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord, TyEncodable, TyDecodable)]
#[derive(Hash, HashStable, TypeFoldable, TypeVisitable)]
#[derive(derive_more::From)]
pub enum ConstKind<'tcx> {
/// A const generic parameter.
Param(ty::ParamConst),
@ -71,12 +72,19 @@ pub enum ConstKind<'tcx> {
/// A placeholder for a const which could not be computed; this is
/// propagated to avoid useless error messages.
#[from(ignore)]
Error(ErrorGuaranteed),
/// Expr which contains an expression which has partially evaluated items.
Expr(Expr<'tcx>),
}
impl<'tcx> From<ty::ConstVid<'tcx>> for ConstKind<'tcx> {
fn from(const_vid: ty::ConstVid<'tcx>) -> Self {
InferConst::Var(const_vid).into()
}
}
#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord, Hash)]
#[derive(HashStable, TyEncodable, TyDecodable, TypeVisitable, TypeFoldable)]
pub enum Expr<'tcx> {

32
compiler/rustc_middle/src/ty/context.rs
View File

@ -17,8 +17,8 @@ use crate::traits;
use crate::ty::query::{self, TyCtxtAt};
use crate::ty::{
self, AdtDef, AdtDefData, AdtKind, Binder, BindingMode, BoundVar, CanonicalPolyFnSig,
ClosureSizeProfileData, Const, ConstS, ConstVid, DefIdTree, FloatTy, FloatVar, FloatVid,
GenericParamDefKind, InferConst, InferTy, IntTy, IntVar, IntVid, List, ParamConst, ParamTy,
ClosureSizeProfileData, Const, ConstS, DefIdTree, FloatTy, FloatVar, FloatVid,
GenericParamDefKind, InferTy, IntTy, IntVar, IntVid, List, ParamConst, ParamTy,
PolyExistentialPredicate, PolyFnSig, Predicate, PredicateKind, PredicateS, ProjectionTy,
Region, RegionKind, ReprOptions, TraitObjectVisitor, Ty, TyKind, TyS, TyVar, TyVid, TypeAndMut,
UintTy, Visibility,
@ -2604,13 +2604,8 @@ impl<'tcx> TyCtxt<'tcx> {
}
#[inline]
pub fn mk_const(self, kind: ty::ConstKind<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
self.mk_const_internal(ty::ConstS { kind, ty })
}
#[inline]
pub fn mk_const_var(self, v: ConstVid<'tcx>, ty: Ty<'tcx>) -> Const<'tcx> {
self.mk_const(ty::ConstKind::Infer(InferConst::Var(v)), ty)
pub fn mk_const(self, kind: impl Into<ty::ConstKind<'tcx>>, ty: Ty<'tcx>) -> Const<'tcx> {
self.mk_const_internal(ty::ConstS { kind: kind.into(), ty })
}
#[inline]
@ -2628,30 +2623,23 @@ impl<'tcx> TyCtxt<'tcx> {
self.mk_ty(Infer(it))
}
#[inline]
pub fn mk_const_infer(self, ic: InferConst<'tcx>, ty: Ty<'tcx>) -> ty::Const<'tcx> {
self.mk_const(ty::ConstKind::Infer(ic), ty)
}
#[inline]
pub fn mk_ty_param(self, index: u32, name: Symbol) -> Ty<'tcx> {
self.mk_ty(Param(ParamTy { index, name }))
}
#[inline]
pub fn mk_const_param(self, index: u32, name: Symbol, ty: Ty<'tcx>) -> Const<'tcx> {
self.mk_const(ty::ConstKind::Param(ParamConst { index, name }), ty)
}
pub fn mk_param_from_def(self, param: &ty::GenericParamDef) -> GenericArg<'tcx> {
match param.kind {
GenericParamDefKind::Lifetime => {
self.mk_region(ty::ReEarlyBound(param.to_early_bound_region_data())).into()
}
GenericParamDefKind::Type { .. } => self.mk_ty_param(param.index, param.name).into(),
GenericParamDefKind::Const { .. } => {
self.mk_const_param(param.index, param.name, self.type_of(param.def_id)).into()
}
GenericParamDefKind::Const { .. } => self
.mk_const(
ParamConst { index: param.index, name: param.name },
self.type_of(param.def_id),
)
.into(),
}
}

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

@ -1468,8 +1468,7 @@ 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(ty::Const::from_value(self.tcx(), valtree, ty));
let contents = self.tcx().destructure_const(self.tcx().mk_const(valtree, ty));
let fields = contents.fields.iter().copied();
match *ty.kind() {
ty::Array(..) => {

5
compiler/rustc_middle/src/ty/relate.rs
View File

@ -663,10 +663,7 @@ pub fn super_relate_consts<'tcx, R: TypeRelation<'tcx>>(
au.substs,
bu.substs,
)?;
return Ok(tcx.mk_const(
ty::ConstKind::Unevaluated(ty::UnevaluatedConst { def: au.def, substs }),
a.ty(),
));
return Ok(tcx.mk_const(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.

2
compiler/rustc_mir_build/src/build/expr/as_constant.rs
View File

@ -77,7 +77,7 @@ impl<'a, 'tcx> Builder<'a, '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 = tcx.mk_const(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

@ -61,5 +61,5 @@ pub(crate) fn lit_to_const<'tcx>(
_ => return Err(LitToConstError::TypeError),
};
Ok(ty::Const::from_value(tcx, valtree, ty))
Ok(tcx.mk_const(valtree, ty))
}

4
compiler/rustc_trait_selection/src/traits/auto_trait.rs
View File

@ -799,9 +799,7 @@ impl<'tcx> AutoTraitFinder<'tcx> {
unevaluated,
Some(obligation.cause.span),
) {
Ok(Some(valtree)) => {
Ok(ty::Const::from_value(selcx.tcx(), valtree, c.ty()))
}
Ok(Some(valtree)) => Ok(selcx.tcx().mk_const(valtree, c.ty())),
Ok(None) => {
let tcx = self.tcx;
let def_id = unevaluated.def.did;

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

@ -818,7 +818,7 @@ impl<'tcx> TypeFolder<'tcx> for BoundVarReplacer<'_, 'tcx> {
let universe = self.universe_for(debruijn);
let p = ty::PlaceholderConst { universe, name: bound_const };
self.mapped_consts.insert(p, bound_const);
self.infcx.tcx.mk_const(ty::ConstKind::Placeholder(p), ct.ty())
self.infcx.tcx.mk_const(p, ct.ty())
}
_ => ct.super_fold_with(self),
}

32
compiler/rustc_ty_utils/src/consts.rs
View File

@ -5,7 +5,7 @@ use rustc_middle::mir::interpret::{LitToConstError, LitToConstInput};
use rustc_middle::thir::visit;
use rustc_middle::thir::visit::Visitor;
use rustc_middle::ty::abstract_const::CastKind;
use rustc_middle::ty::{self, ConstKind, Expr, TyCtxt, TypeVisitable};
use rustc_middle::ty::{self, Expr, TyCtxt, TypeVisitable};
use rustc_middle::{mir, thir};
use rustc_span::Span;
use rustc_target::abi::VariantIdx;
@ -32,10 +32,8 @@ 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(ty::ConstKind::Value(*b), *inner_ty))
.collect::<Vec<_>>();
let field_consts =
branches.iter().map(|b| tcx.mk_const(*b, *inner_ty)).collect::<Vec<_>>();
debug!(?field_consts);
(field_consts, None)
@ -53,7 +51,7 @@ 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(ty::ConstKind::Value(*field_valtree), field_ty);
let field_const = tcx.mk_const(*field_valtree, field_ty);
field_consts.push(field_const);
}
debug!(?field_consts);
@ -62,9 +60,7 @@ 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(ty::ConstKind::Value(*elem_valtree), elem_ty)
})
.map(|(elem_ty, elem_valtree)| tcx.mk_const(*elem_valtree, elem_ty))
.collect::<Vec<_>>();
(fields, None)
@ -129,17 +125,17 @@ fn recurse_build<'tcx>(
}
&ExprKind::NonHirLiteral { lit, user_ty: _ } => {
let val = ty::ValTree::from_scalar_int(lit);
ty::Const::from_value(tcx, val, node.ty)
tcx.mk_const(val, node.ty)
}
&ExprKind::ZstLiteral { user_ty: _ } => {
let val = ty::ValTree::zst();
ty::Const::from_value(tcx, val, node.ty)
tcx.mk_const(val, node.ty)
}
&ExprKind::NamedConst { def_id, substs, user_ty: _ } => {
let uneval = ty::UnevaluatedConst::new(ty::WithOptConstParam::unknown(def_id), substs);
tcx.mk_const(ty::ConstKind::Unevaluated(uneval), node.ty)
tcx.mk_const(uneval, node.ty)
}
ExprKind::ConstParam { param, .. } => tcx.mk_const(ty::ConstKind::Param(*param), node.ty),
ExprKind::ConstParam { param, .. } => tcx.mk_const(*param, node.ty),
ExprKind::Call { fun, args, .. } => {
let fun = recurse_build(tcx, body, *fun, root_span)?;
@ -149,16 +145,16 @@ fn recurse_build<'tcx>(
new_args.push(recurse_build(tcx, body, id, root_span)?);
}
let new_args = tcx.mk_const_list(new_args.iter());
tcx.mk_const(ConstKind::Expr(Expr::FunctionCall(fun, new_args)), node.ty)
tcx.mk_const(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(ConstKind::Expr(Expr::Binop(op, lhs, rhs)), node.ty)
tcx.mk_const(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(ConstKind::Expr(Expr::UnOp(op, arg)), node.ty)
tcx.mk_const(Expr::UnOp(op, arg), node.ty)
}
// This is necessary so that the following compiles:
//
@ -179,11 +175,11 @@ 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(ConstKind::Expr(Expr::Cast(CastKind::Use, arg, node.ty)), node.ty)
tcx.mk_const(Expr::Cast(CastKind::Use, arg, node.ty), node.ty)
}
&ExprKind::Cast { source } => {
let arg = recurse_build(tcx, body, source, root_span)?;
tcx.mk_const(ConstKind::Expr(Expr::Cast(CastKind::As, arg, node.ty)), node.ty)
tcx.mk_const(Expr::Cast(CastKind::As, arg, node.ty), node.ty)
}
ExprKind::Borrow { arg, .. } => {
let arg_node = &body.exprs[*arg];

2
src/tools/tidy/src/deps.rs
View File

@ -98,6 +98,7 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
"chalk-ir",
"chalk-solve",
"chrono",
"convert_case", // dependency of derive_more
"compiler_builtins",
"cpufeatures",
"crc32fast",
@ -108,6 +109,7 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
"crypto-common",
"cstr",
"datafrog",
"derive_more",
"difference",
"digest",
"displaydoc",