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obligations_for_self_ty to sub module

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This commit is contained in:
lcnr 2024-03-12 13:51:46 +01:00
parent 6a9758d4f3
commit 2293f1ed6a
3 changed files with 65 additions and 59 deletions
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59
compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs
View File

@ -3,7 +3,6 @@ use crate::errors::CtorIsPrivate;
use crate::method::{self, MethodCallee, SelfSource};
use crate::rvalue_scopes;
use crate::{BreakableCtxt, Diverges, Expectation, FnCtxt, LoweredTy};
use rustc_data_structures::captures::Captures;
use rustc_data_structures::fx::FxHashSet;
use rustc_errors::{Applicability, Diag, ErrorGuaranteed, MultiSpan, StashKey};
use rustc_hir as hir;
@ -636,64 +635,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
ret_ty.builtin_deref(true).unwrap()
}
#[instrument(skip(self), level = "debug")]
fn self_type_matches_expected_vid(&self, self_ty: Ty<'tcx>, expected_vid: ty::TyVid) -> bool {
let self_ty = self.shallow_resolve(self_ty);
debug!(?self_ty);
match *self_ty.kind() {
ty::Infer(ty::TyVar(found_vid)) => {
let found_vid = self.root_var(found_vid);
debug!("self_type_matches_expected_vid - found_vid={:?}", found_vid);
expected_vid == found_vid
}
_ => false,
}
}
#[instrument(skip(self), level = "debug")]
pub(in super::super) fn obligations_for_self_ty<'b>(
&'b self,
self_ty: ty::TyVid,
) -> impl DoubleEndedIterator<Item = traits::PredicateObligation<'tcx>> + Captures<'tcx> + 'b
{
let ty_var_root = self.root_var(self_ty);
trace!("pending_obligations = {:#?}", self.fulfillment_cx.borrow().pending_obligations());
self.fulfillment_cx.borrow().pending_obligations().into_iter().filter_map(
move |obligation| match &obligation.predicate.kind().skip_binder() {
ty::PredicateKind::Clause(ty::ClauseKind::Projection(data))
if self.self_type_matches_expected_vid(
data.projection_ty.self_ty(),
ty_var_root,
) =>
{
Some(obligation)
}
ty::PredicateKind::Clause(ty::ClauseKind::Trait(data))
if self.self_type_matches_expected_vid(data.self_ty(), ty_var_root) =>
{
Some(obligation)
}
ty::PredicateKind::Clause(ty::ClauseKind::Trait(..))
| ty::PredicateKind::Clause(ty::ClauseKind::Projection(..))
| ty::PredicateKind::Clause(ty::ClauseKind::ConstArgHasType(..))
| ty::PredicateKind::Subtype(..)
| ty::PredicateKind::Coerce(..)
| ty::PredicateKind::Clause(ty::ClauseKind::RegionOutlives(..))
| ty::PredicateKind::Clause(ty::ClauseKind::TypeOutlives(..))
| ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(..))
| ty::PredicateKind::ObjectSafe(..)
| ty::PredicateKind::NormalizesTo(..)
| ty::PredicateKind::AliasRelate(..)
| ty::PredicateKind::Clause(ty::ClauseKind::ConstEvaluatable(..))
| ty::PredicateKind::ConstEquate(..)
| ty::PredicateKind::Ambiguous => None,
},
)
}
pub(in super::super) fn type_var_is_sized(&self, self_ty: ty::TyVid) -> bool {
let sized_did = self.tcx.lang_items().sized_trait();
self.obligations_for_self_ty(self_ty).any(|obligation| {

64
compiler/rustc_hir_typeck/src/fn_ctxt/inspect_obligations.rs Normal file
View File

@ -0,0 +1,64 @@
use crate::FnCtxt;
use rustc_middle::ty::{self, Ty};
use rustc_infer::traits;
use rustc_data_structures::captures::Captures;
impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
#[instrument(skip(self), level = "debug")]
pub(crate) fn obligations_for_self_ty<'b>(
&'b self,
self_ty: ty::TyVid,
) -> impl DoubleEndedIterator<Item = traits::PredicateObligation<'tcx>> + Captures<'tcx> + 'b
{
let ty_var_root = self.root_var(self_ty);
trace!("pending_obligations = {:#?}", self.fulfillment_cx.borrow().pending_obligations());
self.fulfillment_cx.borrow().pending_obligations().into_iter().filter_map(
move |obligation| match &obligation.predicate.kind().skip_binder() {
ty::PredicateKind::Clause(ty::ClauseKind::Projection(data))
if self.self_type_matches_expected_vid(
data.projection_ty.self_ty(),
ty_var_root,
) =>
{
Some(obligation)
}
ty::PredicateKind::Clause(ty::ClauseKind::Trait(data))
if self.self_type_matches_expected_vid(data.self_ty(), ty_var_root) =>
{
Some(obligation)
}
ty::PredicateKind::Clause(ty::ClauseKind::Trait(..))
| ty::PredicateKind::Clause(ty::ClauseKind::Projection(..))
| ty::PredicateKind::Clause(ty::ClauseKind::ConstArgHasType(..))
| ty::PredicateKind::Subtype(..)
| ty::PredicateKind::Coerce(..)
| ty::PredicateKind::Clause(ty::ClauseKind::RegionOutlives(..))
| ty::PredicateKind::Clause(ty::ClauseKind::TypeOutlives(..))
| ty::PredicateKind::Clause(ty::ClauseKind::WellFormed(..))
| ty::PredicateKind::ObjectSafe(..)
| ty::PredicateKind::NormalizesTo(..)
| ty::PredicateKind::AliasRelate(..)
| ty::PredicateKind::Clause(ty::ClauseKind::ConstEvaluatable(..))
| ty::PredicateKind::ConstEquate(..)
| ty::PredicateKind::Ambiguous => None,
},
)
}
#[instrument(level = "debug", skip(self), ret)]
fn self_type_matches_expected_vid(&self, self_ty: Ty<'tcx>, expected_vid: ty::TyVid) -> bool {
let self_ty = self.shallow_resolve(self_ty);
debug!(?self_ty);
match *self_ty.kind() {
ty::Infer(ty::TyVar(found_vid)) => {
let found_vid = self.root_var(found_vid);
debug!("self_type_matches_expected_vid - found_vid={:?}", found_vid);
expected_vid == found_vid
}
_ => false,
}
}
}

1
compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs
View File

@ -2,6 +2,7 @@ mod _impl;
mod adjust_fulfillment_errors;
mod arg_matrix;
mod checks;
mod inspect_obligations;
mod suggestions;
use crate::coercion::DynamicCoerceMany;