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Resolve type aliases in type_certainty

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This commit is contained in:
Jason Newcomb 2023-07-30 03:26:32 -04:00
parent 4c2f460dcc
commit caf601434b
4 changed files with 23 additions and 4 deletions
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9
clippy_utils/src/ty/type_certainty/mod.rs
View File

@ -12,7 +12,7 @@
//! be considered a bug.
use crate::def_path_res;
use rustc_hir::def::Res;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::DefId;
use rustc_hir::intravisit::{walk_qpath, walk_ty, Visitor};
use rustc_hir::{self as hir, Expr, ExprKind, GenericArgs, HirId, Node, PathSegment, QPath, TyKind};
@ -219,7 +219,12 @@ fn path_segment_certainty(
// See the comment preceding `qpath_certainty`. `def_id` could refer to a type or a value.
let certainty = lhs.join_clearing_def_ids(rhs);
if resolves_to_type {
certainty.with_def_id(def_id)
if cx.tcx.def_kind(def_id) == DefKind::TyAlias {
adt_def_id(cx.tcx.type_of(def_id).instantiate_identity())
.map_or(certainty, |def_id| certainty.with_def_id(def_id))
} else {
certainty.with_def_id(def_id)
}
} else {
certainty
}

4
tests/ui/unwrap_or_else_default.fixed
View File

@ -109,6 +109,10 @@ fn type_certainty(option: Option<Vec<u64>>) {
// should not be changed: no type annotation, unconcretized initializer
let option = None;
option.unwrap_or_else(Vec::new).push(1);
type Alias = Option<Vec<u32>>;
let option: Alias = Option::<Vec<u32>>::Some(Vec::new());
option.unwrap_or_default().push(1);
}
fn method_call_with_deref() {

4
tests/ui/unwrap_or_else_default.rs
View File

@ -109,6 +109,10 @@ fn type_certainty(option: Option<Vec<u64>>) {
// should not be changed: no type annotation, unconcretized initializer
let option = None;
option.unwrap_or_else(Vec::new).push(1);
type Alias = Option<Vec<u32>>;
let option: Alias = Option::<Vec<u32>>::Some(Vec::new());
option.unwrap_or_else(Vec::new).push(1);
}
fn method_call_with_deref() {

10
tests/ui/unwrap_or_else_default.stderr
View File

@ -84,11 +84,17 @@ error: use of `unwrap_or_else` to construct default value
LL | option.unwrap_or_else(Vec::new).push(1);
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
error: use of `unwrap_or_else` to construct default value
--> $DIR/unwrap_or_else_default.rs:115:12
|
LL | option.unwrap_or_else(Vec::new).push(1);
| ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
error: use of `or_insert_with` to construct default value
--> $DIR/unwrap_or_else_default.rs:128:32
--> $DIR/unwrap_or_else_default.rs:132:32
|
LL | let _ = inner_map.entry(0).or_insert_with(Default::default);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `or_default()`
error: aborting due to 15 previous errors
error: aborting due to 16 previous errors