Use #[derive] instead of custom syntax in all newtype_index

compiler/rustc_middle/src/mir/mod.rs

@@ -654,8 +654,8 @@ impl SourceInfo {
 // Variables and temps
 
 rustc_index::newtype_index! {
+    #[derive(HashStable)]
     pub struct Local {
-        derive [HashStable]
         DEBUG_FORMAT = "_{}",
         const RETURN_PLACE = 0,
     }
@@ -1146,8 +1146,8 @@ rustc_index::newtype_index! {
     ///     https://rustc-dev-guide.rust-lang.org/appendix/background.html#what-is-a-dataflow-analysis
     /// [`CriticalCallEdges`]: ../../rustc_const_eval/transform/add_call_guards/enum.AddCallGuards.html#variant.CriticalCallEdges
     /// [guide-mir]: https://rustc-dev-guide.rust-lang.org/mir/
+    #[derive(HashStable)]
     pub struct BasicBlock {
-        derive [HashStable]
         DEBUG_FORMAT = "bb{}",
         const START_BLOCK = 0,
     }
@@ -1530,8 +1530,8 @@ rustc_index::newtype_index! {
     /// [wrapper]: https://rustc-dev-guide.rust-lang.org/appendix/glossary.html#newtype
     /// [CFG]: https://rustc-dev-guide.rust-lang.org/appendix/background.html#cfg
     /// [mir-datatypes]: https://rustc-dev-guide.rust-lang.org/mir/index.html#mir-data-types
+    #[derive(HashStable)]
     pub struct Field {
-        derive [HashStable]
         DEBUG_FORMAT = "field[{}]"
     }
 }
@@ -1757,8 +1757,8 @@ impl Debug for Place<'_> {
 // Scopes
 
 rustc_index::newtype_index! {
+    #[derive(HashStable)]
     pub struct SourceScope {
-        derive [HashStable]
         DEBUG_FORMAT = "scope[{}]",
         const OUTERMOST_SOURCE_SCOPE = 0,
     }
@@ -2755,8 +2755,8 @@ impl<'tcx> TypeVisitable<'tcx> for UserTypeProjection {
 }
 
 rustc_index::newtype_index! {
+    #[derive(HashStable)]
     pub struct Promoted {
-        derive [HashStable]
         DEBUG_FORMAT = "promoted[{}]"
     }
 }