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Simplify code by using VecMap::get_by

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This commit is contained in:
Santiago Pastorino 2021-06-08 09:41:26 -03:00
parent dd56ec653c
commit 1278f3f295
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GPG key ID: 8131A24E0C79EFAF
2 changed files with 65 additions and 73 deletions
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4
compiler/rustc_mir/src/borrow_check/type_check/mod.rs
View file

@ -1291,9 +1291,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
};
let concrete_ty = match concrete_opaque_types
.iter()
.find(|(key, _)| key.def_id == opaque_type_key.def_id)
.map(|(_, ty)| ty)
.get_by(|(key, _)| key.def_id == opaque_type_key.def_id)
{
None => {
if !concrete_is_opaque {

38
compiler/rustc_typeck/src/collect/type_of.rs
View file

@ -1,5 +1,4 @@
use rustc_data_structures::fx::FxHashSet;
use rustc_data_structures::vec_map::VecMap;
use rustc_errors::{Applicability, ErrorReported, StashKey};
use rustc_hir as hir;
use rustc_hir::def::{DefKind, Res};
@ -10,7 +9,7 @@ use rustc_hir::{HirId, Node};
use rustc_middle::hir::map::Map;
use rustc_middle::ty::subst::{GenericArgKind, InternalSubsts};
use rustc_middle::ty::util::IntTypeExt;
use rustc_middle::ty::{self, DefIdTree, OpaqueTypeKey, Ty, TyCtxt, TypeFoldable};
use rustc_middle::ty::{self, DefIdTree, Ty, TyCtxt, TypeFoldable};
use rustc_span::symbol::Ident;
use rustc_span::{Span, DUMMY_SP};
@ -347,11 +346,11 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: DefId) -> Ty<'_> {
}
// Opaque types desugared from `impl Trait`.
ItemKind::OpaqueTy(OpaqueTy { impl_trait_fn: Some(owner), .. }) => {
let concrete_ty = find_concrete_ty_from_def_id(
&tcx.mir_borrowck(owner.expect_local()).concrete_opaque_types,
def_id.to_def_id(),
)
.map(|&(_, concrete_ty)| concrete_ty)
let concrete_ty = tcx
.mir_borrowck(owner.expect_local())
.concrete_opaque_types
.get_by(|(key, _)| key.def_id == def_id.to_def_id())
.map(|concrete_ty| *concrete_ty)
.unwrap_or_else(|| {
tcx.sess.delay_span_bug(
DUMMY_SP,
@ -516,10 +515,11 @@ fn find_opaque_ty_constraints(tcx: TyCtxt<'_>, def_id: LocalDefId) -> Ty<'_> {
}
// Calling `mir_borrowck` can lead to cycle errors through
// const-checking, avoid calling it if we don't have to.
if find_concrete_ty_from_def_id(
&self.tcx.typeck(def_id).concrete_opaque_types,
self.def_id,
)
if self
.tcx
.typeck(def_id)
.concrete_opaque_types
.get_by(|(key, _)| key.def_id == self.def_id)
.is_none()
{
debug!(
@ -531,7 +531,7 @@ fn find_opaque_ty_constraints(tcx: TyCtxt<'_>, def_id: LocalDefId) -> Ty<'_> {
// Use borrowck to get the type with unerased regions.
let concrete_opaque_types = &self.tcx.mir_borrowck(def_id).concrete_opaque_types;
if let Some((opaque_type_key, concrete_type)) =
find_concrete_ty_from_def_id(concrete_opaque_types, self.def_id)
concrete_opaque_types.iter().find(|(key, _)| key.def_id == self.def_id)
{
debug!(
"find_opaque_ty_constraints: found constraint for `{:?}` at `{:?}`: {:?}",
@ -705,9 +705,10 @@ fn let_position_impl_trait_type(tcx: TyCtxt<'_>, opaque_ty_id: LocalDefId) -> Ty
let opaque_ty_def_id = opaque_ty_id.to_def_id();
let owner_typeck_results = tcx.typeck(scope_def_id);
let concrete_ty =
find_concrete_ty_from_def_id(&owner_typeck_results.concrete_opaque_types, opaque_ty_def_id)
.map(|&(_, concrete_ty)| concrete_ty)
let concrete_ty = owner_typeck_results
.concrete_opaque_types
.get_by(|(key, _)| key.def_id == opaque_ty_def_id)
.map(|concrete_ty| *concrete_ty)
.unwrap_or_else(|| {
tcx.sess.delay_span_bug(
DUMMY_SP,
@ -803,10 +804,3 @@ fn check_feature_inherent_assoc_ty(tcx: TyCtxt<'_>, span: Span) {
.emit();
}
}
fn find_concrete_ty_from_def_id<'tcx>(
concrete_opaque_types: &'tcx VecMap<OpaqueTypeKey<'tcx>, Ty<'tcx>>,
def_id: DefId,
) -> Option<&'tcx (OpaqueTypeKey<'tcx>, Ty<'tcx>)> {
concrete_opaque_types.iter().find(|(opaque_type_key, _)| opaque_type_key.def_id == def_id)
}