Fix new dead_code instances in rust-analyzer

Author: GrigorenkoPV

src/tools/rust-analyzer/crates/hir-def/src/hir/format_args.rs

@@ -160,9 +160,12 @@ pub enum FormatArgumentKind {
 
 // Only used in parse_args and report_invalid_references,
 // to indicate how a referred argument was used.
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug)]
 enum PositionUsedAs {
-    Placeholder(Option<TextRange>),
+    Placeholder(
+        // FIXME(#143487): is it okay that the field is never read?
+        #[allow(dead_code)] Option<TextRange>,
+    ),
     Precision,
     Width,
 }

src/tools/rust-analyzer/crates/hir-ty/src/diagnostics/match_check.rs

@@ -66,6 +66,8 @@ pub(crate) enum PatKind {
     /// `Foo(...)` or `Foo{...}` or `Foo`, where `Foo` is a variant name from an ADT with
     /// multiple variants.
     Variant {
+        // FIXME(#143487): is it okay that the field is never read?
+        #[allow(dead_code)]
         substs: Substitution,
         enum_variant: EnumVariantId,
         subpatterns: Vec<FieldPat>,

src/tools/rust-analyzer/crates/hir-ty/src/infer/cast.rs

@@ -362,7 +362,10 @@ enum PointerKind {
     // slice
     Length,
     OfAlias,
-    OfParam(PlaceholderIndex),
+    OfParam(
+        // FIXME(#143487): is it okay that the field is never read?
+        #[allow(dead_code)] PlaceholderIndex,
+    ),
     Error,
 }
 

src/tools/rust-analyzer/crates/hir/src/lib.rs

@@ -4632,9 +4632,11 @@ impl Closure {
     }
 }
 
-#[derive(Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Debug)]
 pub struct ClosureCapture {
     owner: DefWithBodyId,
+    // FIXME(#143487): is it okay that the field is never read?
+    #[allow(dead_code)]
     closure: ClosureId,
     capture: hir_ty::CapturedItem,
 }

src/tools/rust-analyzer/crates/ide-completion/src/context.rs

@@ -287,6 +287,7 @@ pub(crate) struct PatternContext {
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub(crate) struct ParamContext {
     pub(crate) param_list: ast::ParamList,
+    #[allow(dead_code, reason = "Used for equality comparison")]
     pub(crate) param: ast::Param,
     pub(crate) kind: ParamKind,
 }

src/tools/rust-analyzer/xtask/src/publish/notes.rs

@@ -421,9 +421,15 @@ impl Default for ListNesting {
 
 #[derive(Debug, PartialEq, Eq)]
 enum ListMarker {
-    Asterisk(usize),
+    Asterisk(
+        // FIXME(#143487): is it okay that the field is never read?
+        #[allow(dead_code)] usize,
+    ),
     Hyphen,
-    Dot(usize),
+    Dot(
+        // FIXME(#143487): is it okay that the field is never read?
+        #[allow(dead_code)] usize,
+    ),
 }
 
 impl ListMarker {