Auto merge of #117772 - surechen:for_117448, r=petrochenkov

Tracking import use types for more accurate redundant import checking

fixes #117448

By tracking import use types to check whether it is scope uses or the other situations like module-relative uses,  we can do more accurate redundant import checking.

For example unnecessary imports in std::prelude that can be eliminated:

```rust
use std::option::Option::Some;//~ WARNING the item `Some` is imported redundantly
use std::option::Option::None; //~ WARNING the item `None` is imported redundantly
```
This commit is contained in:
bors
2024-02-18 13:56:07 +00:00
52 changed files with 283 additions and 167 deletions

View File

@@ -5,10 +5,9 @@ use super::compare_impl_item::check_type_bounds;
use super::compare_impl_item::{compare_impl_method, compare_impl_ty};
use super::*;
use rustc_attr as attr;
use rustc_errors::{codes::*, ErrorGuaranteed, MultiSpan};
use rustc_errors::{codes::*, MultiSpan};
use rustc_hir as hir;
use rustc_hir::def::{CtorKind, DefKind};
use rustc_hir::def_id::{DefId, LocalDefId};
use rustc_hir::Node;
use rustc_infer::infer::{RegionVariableOrigin, TyCtxtInferExt};
use rustc_infer::traits::{Obligation, TraitEngineExt as _};