Auto merge of #13829 - nyurik:explicit-auto-deref, r=lnicola

Clippy-fix explicit auto-deref

Seems like these can be safely fixed. With one, I was particularly surprised -- `Some(pats) => &**pats,` in body.rs?

```
cargo clippy --fix -- -A clippy::all -D clippy::explicit_auto_deref
```

Author: bors

crates/base-db/src/input.rs

@@ -128,7 +128,7 @@ impl fmt::Display for CrateName {
 impl ops::Deref for CrateName {
     type Target = str;
     fn deref(&self) -> &str {
-        &*self.0
+        &self.0
     }
 }
 
@@ -211,7 +211,7 @@ impl fmt::Display for CrateDisplayName {
 impl ops::Deref for CrateDisplayName {
     type Target = str;
     fn deref(&self) -> &str {
-        &*self.crate_name
+        &self.crate_name
     }
 }
 

crates/base-db/src/lib.rs

@@ -77,7 +77,7 @@ pub trait SourceDatabase: FileLoader + std::fmt::Debug {
 fn parse_query(db: &dyn SourceDatabase, file_id: FileId) -> Parse<ast::SourceFile> {
     let _p = profile::span("parse_query").detail(|| format!("{:?}", file_id));
     let text = db.file_text(file_id);
-    SourceFile::parse(&*text)
+    SourceFile::parse(&text)
 }
 
 /// We don't want to give HIR knowledge of source roots, hence we extract these

crates/hir-def/src/body.rs

@@ -372,7 +372,7 @@ impl Body {
     /// Retrieves all ident patterns this pattern shares the ident with.
     pub fn ident_patterns_for<'slf>(&'slf self, pat: &'slf PatId) -> &'slf [PatId] {
         match self.or_pats.get(pat) {
-            Some(pats) => &**pats,
+            Some(pats) => pats,
             None => std::slice::from_ref(pat),
         }
     }

crates/hir-def/src/body/scope.rs

@@ -47,7 +47,7 @@ pub struct ScopeData {
 impl ExprScopes {
     pub(crate) fn expr_scopes_query(db: &dyn DefDatabase, def: DefWithBodyId) -> Arc<ExprScopes> {
         let body = db.body(def);
-        let mut scopes = ExprScopes::new(&*body);
+        let mut scopes = ExprScopes::new(&body);
         scopes.shrink_to_fit();
         Arc::new(scopes)
     }

crates/hir/src/semantics.rs

@@ -1246,7 +1246,7 @@ impl<'db> SemanticsImpl<'db> {
 
     fn with_ctx<F: FnOnce(&mut SourceToDefCtx<'_, '_>) -> T, T>(&self, f: F) -> T {
         let mut cache = self.s2d_cache.borrow_mut();
-        let mut ctx = SourceToDefCtx { db: self.db, cache: &mut *cache };
+        let mut ctx = SourceToDefCtx { db: self.db, cache: &mut cache };
         f(&mut ctx)
     }
 

crates/ide-assists/src/handlers/inline_call.rs

@@ -394,7 +394,7 @@ fn inline(
     // Inline parameter expressions or generate `let` statements depending on whether inlining works or not.
     for ((pat, param_ty, _), usages, expr) in izip!(params, param_use_nodes, arguments).rev() {
         // izip confuses RA due to our lack of hygiene info currently losing us type info causing incorrect errors
-        let usages: &[ast::PathExpr] = &*usages;
+        let usages: &[ast::PathExpr] = &usages;
         let expr: &ast::Expr = expr;
 
         let insert_let_stmt = || {

crates/ide-db/src/lib.rs

@@ -165,7 +165,7 @@ pub trait LineIndexDatabase: base_db::SourceDatabase {
 
 fn line_index(db: &dyn LineIndexDatabase, file_id: FileId) -> Arc<LineIndex> {
     let text = db.file_text(file_id);
-    Arc::new(LineIndex::new(&*text))
+    Arc::new(LineIndex::new(&text))
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]

crates/ide-diagnostics/src/tests.rs

@@ -102,7 +102,7 @@ pub(crate) fn check_diagnostics_with_config(config: DiagnosticsConfig, ra_fixtur
     for file_id in files {
         let diagnostics = super::diagnostics(&db, &config, &AssistResolveStrategy::All, file_id);
 
-        let expected = extract_annotations(&*db.file_text(file_id));
+        let expected = extract_annotations(&db.file_text(file_id));
         let mut actual = diagnostics
             .into_iter()
             .map(|d| {

crates/ide/src/inlay_hints.rs

@@ -459,7 +459,7 @@ mod tests {
     #[track_caller]
     pub(super) fn check_with_config(config: InlayHintsConfig, ra_fixture: &str) {
         let (analysis, file_id) = fixture::file(ra_fixture);
-        let mut expected = extract_annotations(&*analysis.file_text(file_id).unwrap());
+        let mut expected = extract_annotations(&analysis.file_text(file_id).unwrap());
         let inlay_hints = analysis.inlay_hints(&config, file_id, None).unwrap();
         let actual = inlay_hints
             .into_iter()

crates/ide/src/inlay_hints/bind_pat.rs

@@ -463,7 +463,7 @@ fn main() {
         }
         "#;
         let (analysis, file_id) = fixture::file(fixture);
-        let expected = extract_annotations(&*analysis.file_text(file_id).unwrap());
+        let expected = extract_annotations(&analysis.file_text(file_id).unwrap());
         let inlay_hints = analysis
             .inlay_hints(
                 &InlayHintsConfig { type_hints: true, ..DISABLED_CONFIG },