Auto merge of #85178 - cjgillot:local-crate, r=oli-obk

Remove CrateNum parameter for queries that only work on local crate

The pervasive `CrateNum` parameter is a remnant of the multi-crate rustc idea.

Using `()` as query key in those cases avoids having to worry about the validity of the query key.

clippy_lints/src/derive.rs

@@ -12,7 +12,7 @@ use rustc_lint::{LateContext, LateLintPass};
 use rustc_middle::hir::map::Map;
 use rustc_middle::ty::{self, Ty};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
-use rustc_span::{def_id::LOCAL_CRATE, source_map::Span};
+use rustc_span::{source_map::Span};
 
 declare_clippy_lint! {
     /// **What it does:** Checks for deriving `Hash` but implementing `PartialEq`
@@ -312,7 +312,7 @@ fn check_copy_clone<'tcx>(cx: &LateContext<'tcx>, item: &Item<'_>, trait_ref: &T
         if ty_subs.non_erasable_generics().next().is_some() {
             let has_copy_impl = cx
                 .tcx
-                .all_local_trait_impls(LOCAL_CRATE)
+                .all_local_trait_impls(())
                 .get(&copy_id)
                 .map_or(false, |impls| {
                     impls

clippy_lints/src/inherent_impl.rs

@@ -3,7 +3,7 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::in_macro;
 use rustc_hir::def_id::DefIdMap;
-use rustc_hir::{def_id, Crate, Impl, Item, ItemKind};
+use rustc_hir::{Crate, Impl, Item, ItemKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
 use rustc_span::Span;
@@ -68,7 +68,7 @@ impl<'tcx> LateLintPass<'tcx> for MultipleInherentImpl {
     fn check_crate_post(&mut self, cx: &LateContext<'tcx>, krate: &'tcx Crate<'_>) {
         if !krate.items.is_empty() {
             // Retrieve all inherent implementations from the crate, grouped by type
-            for impls in cx.tcx.crate_inherent_impls(def_id::LOCAL_CRATE).inherent_impls.values() {
+            for impls in cx.tcx.crate_inherent_impls(()).inherent_impls.values() {
                 // Filter out implementations that have generic params (type or lifetime)
                 let mut impl_spans = impls.iter().filter_map(|impl_def| self.impls.get(impl_def));
                 if let Some(initial_span) = impl_spans.next() {

clippy_utils/src/lib.rs

@@ -60,7 +60,7 @@ use rustc_ast::ast::{self, Attribute, BorrowKind, LitKind};
 use rustc_data_structures::fx::FxHashMap;
 use rustc_hir as hir;
 use rustc_hir::def::{DefKind, Res};
-use rustc_hir::def_id::{DefId, LOCAL_CRATE};
+use rustc_hir::def_id::DefId;
 use rustc_hir::intravisit::{self, walk_expr, ErasedMap, FnKind, NestedVisitorMap, Visitor};
 use rustc_hir::LangItem::{ResultErr, ResultOk};
 use rustc_hir::{
@@ -677,7 +677,7 @@ pub fn method_chain_args<'a>(expr: &'a Expr<'_>, methods: &[&str]) -> Option<Vec
 /// Returns `true` if the provided `def_id` is an entrypoint to a program.
 pub fn is_entrypoint_fn(cx: &LateContext<'_>, def_id: DefId) -> bool {
     cx.tcx
-        .entry_fn(LOCAL_CRATE)
+        .entry_fn(())
         .map_or(false, |(entry_fn_def_id, _)| def_id == entry_fn_def_id)
 }