Rollup merge of #88486 - bjorn3:better_arena_macro, r=jackh726

Remove unused arena macro args

Author: m-ou-se

compiler/rustc_arena/src/lib.rs

@@ -635,7 +635,7 @@ pub macro which_arena_for_type {
 }
 
 #[rustc_macro_transparency = "semitransparent"]
-pub macro declare_arena([], [$($a:tt $name:ident: $ty:ty,)*], $tcx:lifetime) {
+pub macro declare_arena([$($a:tt $name:ident: $ty:ty,)*], $tcx:lifetime) {
     #[derive(Default)]
     pub struct Arena<$tcx> {
         pub dropless: $crate::DroplessArena,

compiler/rustc_ast_lowering/src/lib.rs

@@ -84,7 +84,7 @@ mod path;
 
 const HIR_ID_COUNTER_LOCKED: u32 = 0xFFFFFFFF;
 
-rustc_hir::arena_types!(rustc_arena::declare_arena, [], 'tcx);
+rustc_hir::arena_types!(rustc_arena::declare_arena, 'tcx);
 
 struct LoweringContext<'a, 'hir: 'a> {
     /// Used to assign IDs to HIR nodes that do not directly correspond to AST nodes.

compiler/rustc_hir/src/arena.rs

@@ -9,8 +9,8 @@
 /// where `T` is the type listed. These impls will appear in the implement_ty_decoder! macro.
 #[macro_export]
 macro_rules! arena_types {
-    ($macro:path, $args:tt, $tcx:lifetime) => (
-        $macro!($args, [
+    ($macro:path, $tcx:lifetime) => (
+        $macro!([
             // HIR types
             [few] hir_krate: rustc_hir::Crate<$tcx>,
             [] arm: rustc_hir::Arm<$tcx>,

compiler/rustc_middle/src/arena.rs

@@ -9,8 +9,8 @@
 /// listed. These impls will appear in the implement_ty_decoder! macro.
 #[macro_export]
 macro_rules! arena_types {
-    ($macro:path, $args:tt, $tcx:lifetime) => (
-        $macro!($args, [
+    ($macro:path, $tcx:lifetime) => (
+        $macro!([
             [] layouts: rustc_target::abi::Layout,
             // AdtDef are interned and compared by address
             [] adt_def: rustc_middle::ty::AdtDef,
@@ -109,4 +109,4 @@ macro_rules! arena_types {
     )
 }
 
-arena_types!(rustc_arena::declare_arena, [], 'tcx);
+arena_types!(rustc_arena::declare_arena, 'tcx);

compiler/rustc_middle/src/ty/codec.rs

@@ -437,15 +437,15 @@ macro_rules! impl_arena_allocatable_decoder {
 }
 
 macro_rules! impl_arena_allocatable_decoders {
-    ([], [$($a:tt $name:ident: $ty:ty,)*], $tcx:lifetime) => {
+    ([$($a:tt $name:ident: $ty:ty,)*], $tcx:lifetime) => {
         $(
             impl_arena_allocatable_decoder!($a [[$name: $ty], $tcx]);
         )*
     }
 }
 
-rustc_hir::arena_types!(impl_arena_allocatable_decoders, [], 'tcx);
-arena_types!(impl_arena_allocatable_decoders, [], 'tcx);
+rustc_hir::arena_types!(impl_arena_allocatable_decoders, 'tcx);
+arena_types!(impl_arena_allocatable_decoders, 'tcx);
 
 #[macro_export]
 macro_rules! implement_ty_decoder {