Prevent macro ambiguity errors

The previous macro_rules! parsers failed when an additional modifier was added
with ambiguity errors. The error is pretty unclear as to what exactly the cause
here is, but this change simplifies the argument parsing code such that the
error is avoided.

1 files changed, 13 insertions, 13 deletions

diff --git a/compiler/rustc_query_impl/src/plumbing.rs b/compiler/rustc_query_impl/src/plumbing.rs
index bb686b5ef3f..818b798ab55 100644
--- a/compiler/rustc_query_impl/src/plumbing.rs
+++ b/compiler/rustc_query_impl/src/plumbing.rs
@@ -253,17 +253,17 @@ macro_rules! handle_cycle_error {
         $error.emit();
         Value::from_cycle_error($tcx)
     }};
-    ([fatal_cycle $($rest:tt)*][$tcx:expr, $error:expr]) => {{
+    ([(fatal_cycle) $($rest:tt)*][$tcx:expr, $error:expr]) => {{
         $error.emit();
         $tcx.sess.abort_if_errors();
         unreachable!()
     }};
-    ([cycle_delay_bug $($rest:tt)*][$tcx:expr, $error:expr]) => {{
+    ([(cycle_delay_bug) $($rest:tt)*][$tcx:expr, $error:expr]) => {{
         $error.delay_as_bug();
         Value::from_cycle_error($tcx)
     }};
-    ([$other:ident $(($($other_args:tt)*))* $(, $($modifiers:tt)*)*][$($args:tt)*]) => {
-        handle_cycle_error!([$($($modifiers)*)*][$($args)*])
+    ([$other:tt $($modifiers:tt)*][$($args:tt)*]) => {
+        handle_cycle_error!([$($modifiers)*][$($args)*])
     };
 }
 
@@ -271,11 +271,11 @@ macro_rules! is_anon {
     ([]) => {{
         false
     }};
-    ([anon $($rest:tt)*]) => {{
+    ([(anon) $($rest:tt)*]) => {{
         true
     }};
-    ([$other:ident $(($($other_args:tt)*))* $(, $($modifiers:tt)*)*]) => {
-        is_anon!([$($($modifiers)*)*])
+    ([$other:tt $($modifiers:tt)*]) => {
+        is_anon!([$($modifiers)*])
     };
 }
 
@@ -283,11 +283,11 @@ macro_rules! is_eval_always {
     ([]) => {{
         false
     }};
-    ([eval_always $($rest:tt)*]) => {{
+    ([(eval_always) $($rest:tt)*]) => {{
         true
     }};
-    ([$other:ident $(($($other_args:tt)*))* $(, $($modifiers:tt)*)*]) => {
-        is_eval_always!([$($($modifiers)*)*])
+    ([$other:tt $($modifiers:tt)*]) => {
+        is_eval_always!([$($modifiers)*])
     };
 }
 
@@ -295,11 +295,11 @@ macro_rules! hash_result {
     ([][$hcx:expr, $result:expr]) => {{
         dep_graph::hash_result($hcx, &$result)
     }};
-    ([no_hash $($rest:tt)*][$hcx:expr, $result:expr]) => {{
+    ([(no_hash) $($rest:tt)*][$hcx:expr, $result:expr]) => {{
         None
     }};
-    ([$other:ident $(($($other_args:tt)*))* $(, $($modifiers:tt)*)*][$($args:tt)*]) => {
-        hash_result!([$($($modifiers)*)*][$($args)*])
+    ([$other:tt $($modifiers:tt)*][$($args:tt)*]) => {
+        hash_result!([$($modifiers)*][$($args)*])
     };
 }