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refactor: use cast() instead of interning GenericArgData

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Ryo Yoshida 2022-10-02 18:39:42 +09:00
parent 5c28ad1932
commit f8f5a5ea57
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5 changed files with 34 additions and 61 deletions
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39
crates/hir-ty/src/builder.rs
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@ -6,7 +6,7 @@ use chalk_ir::{
cast::{Cast, CastTo, Caster},
fold::TypeFoldable,
interner::HasInterner,
AdtId, BoundVar, DebruijnIndex, Scalar,
AdtId, DebruijnIndex, Scalar,
};
use hir_def::{
builtin_type::BuiltinType, generics::TypeOrConstParamData, ConstParamId, DefWithBodyId,
@ -16,9 +16,9 @@ use smallvec::SmallVec;
use crate::{
consteval::unknown_const_as_generic, db::HirDatabase, infer::unify::InferenceTable, primitive,
to_assoc_type_id, to_chalk_trait_id, utils::generics, Binders, CallableSig, ConstData,
ConstValue, GenericArg, GenericArgData, Interner, ProjectionTy, Substitution, TraitRef, Ty,
TyDefId, TyExt, TyKind, ValueTyDefId,
to_assoc_type_id, to_chalk_trait_id, utils::generics, Binders, BoundVar, CallableSig,
GenericArg, Interner, ProjectionTy, Substitution, TraitRef, Ty, TyDefId, TyExt, TyKind,
ValueTyDefId,
};
#[derive(Debug, Clone, PartialEq, Eq)]
@ -79,20 +79,12 @@ impl<D> TyBuilder<D> {
pub fn fill_with_bound_vars(self, debruijn: DebruijnIndex, starting_from: usize) -> Self {
// self.fill is inlined to make borrow checker happy
let mut this = self;
let other = this.param_kinds.iter().skip(this.vec.len());
let other = &this.param_kinds[this.vec.len()..];
let filler = (starting_from..).zip(other).map(|(idx, kind)| match kind {
ParamKind::Type => {
GenericArgData::Ty(TyKind::BoundVar(BoundVar::new(debruijn, idx)).intern(Interner))
.intern(Interner)
ParamKind::Type => BoundVar::new(debruijn, idx).to_ty(Interner).cast(Interner),
ParamKind::Const(ty) => {
BoundVar::new(debruijn, idx).to_const(Interner, ty.clone()).cast(Interner)
}
ParamKind::Const(ty) => GenericArgData::Const(
ConstData {
value: ConstValue::BoundVar(BoundVar::new(debruijn, idx)),
ty: ty.clone(),
}
.intern(Interner),
)
.intern(Interner),
});
this.vec.extend(filler.take(this.remaining()).casted(Interner));
assert_eq!(this.remaining(), 0);
@ -102,8 +94,8 @@ impl<D> TyBuilder<D> {
pub fn fill_with_unknown(self) -> Self {
// self.fill is inlined to make borrow checker happy
let mut this = self;
let filler = this.param_kinds.iter().skip(this.vec.len()).map(|x| match x {
ParamKind::Type => GenericArgData::Ty(TyKind::Error.intern(Interner)).intern(Interner),
let filler = this.param_kinds[this.vec.len()..].iter().map(|x| match x {
ParamKind::Type => TyKind::Error.intern(Interner).cast(Interner),
ParamKind::Const(ty) => unknown_const_as_generic(ty.clone()),
});
this.vec.extend(filler.casted(Interner));
@ -113,15 +105,13 @@ impl<D> TyBuilder<D> {
pub(crate) fn fill_with_inference_vars(self, table: &mut InferenceTable<'_>) -> Self {
self.fill(|x| match x {
ParamKind::Type => GenericArgData::Ty(table.new_type_var()).intern(Interner),
ParamKind::Const(ty) => {
GenericArgData::Const(table.new_const_var(ty.clone())).intern(Interner)
}
ParamKind::Type => table.new_type_var().cast(Interner),
ParamKind::Const(ty) => table.new_const_var(ty.clone()).cast(Interner),
})
}
pub fn fill(mut self, filler: impl FnMut(&ParamKind) -> GenericArg) -> Self {
self.vec.extend(self.param_kinds.iter().skip(self.vec.len()).map(filler));
self.vec.extend(self.param_kinds[self.vec.len()..].iter().map(filler));
assert_eq!(self.remaining(), 0);
self
}
@ -255,7 +245,8 @@ impl TyBuilder<hir_def::AdtId> {
) -> Self {
let defaults = db.generic_defaults(self.data.into());
for default_ty in defaults.iter().skip(self.vec.len()) {
if let GenericArgData::Ty(x) = default_ty.skip_binders().data(Interner) {
// NOTE(skip_binders): we only check if the arg type is error type.
if let Some(x) = default_ty.skip_binders().ty(Interner) {
if x.is_unknown() {
self.vec.push(fallback().cast(Interner));
continue;