Remove FnArg::Ignored variant

src/gen/fold.rs

@@ -1584,7 +1584,6 @@ pub fn fold_fn_arg<V: Fold + ?Sized>(_visitor: &mut V, _i: FnArg) -> FnArg {
         FnArg::SelfValue(_binding_0) => FnArg::SelfValue(_visitor.fold_arg_self(_binding_0)),
         FnArg::Captured(_binding_0) => FnArg::Captured(_visitor.fold_arg_captured(_binding_0)),
         FnArg::Inferred(_binding_0) => FnArg::Inferred(_visitor.fold_pat(_binding_0)),
-        FnArg::Ignored(_binding_0) => FnArg::Ignored(_visitor.fold_type(_binding_0)),
     }
 }
 #[cfg(feature = "full")]

src/gen/visit.rs

@@ -1767,9 +1767,6 @@ pub fn visit_fn_arg<'ast, V: Visit<'ast> + ?Sized>(_visitor: &mut V, _i: &'ast F
         FnArg::Inferred(ref _binding_0) => {
             _visitor.visit_pat(_binding_0);
         }
-        FnArg::Ignored(ref _binding_0) => {
-            _visitor.visit_type(_binding_0);
-        }
     }
 }
 #[cfg(feature = "full")]

src/gen/visit_mut.rs

@@ -1743,9 +1743,6 @@ pub fn visit_fn_arg_mut<V: VisitMut + ?Sized>(_visitor: &mut V, _i: &mut FnArg)
         FnArg::Inferred(ref mut _binding_0) => {
             _visitor.visit_pat_mut(_binding_0);
         }
-        FnArg::Ignored(ref mut _binding_0) => {
-            _visitor.visit_type_mut(_binding_0);
-        }
     }
 }
 #[cfg(feature = "full")]

src/item.rs

@@ -769,8 +769,6 @@ ast_enum_of_structs! {
 
         /// A pattern whose type is inferred captured by a function signature.
         pub Inferred(Pat),
-        /// A type not bound to any pattern in a function signature.
-        pub Ignored(Type),
     }
 }
 
@@ -1200,18 +1198,7 @@ pub mod parsing {
                 }
             }
 
-            let ahead = input.fork();
-            let err = match ahead.call(arg_captured) {
-                Ok(_) => return input.call(arg_captured).map(FnArg::Captured),
-                Err(err) => err,
-            };
-
-            let ahead = input.fork();
-            if ahead.parse::<Type>().is_ok() {
-                return input.parse().map(FnArg::Ignored);
-            }
-
-            Err(err)
+            input.call(arg_captured).map(FnArg::Captured)
         }
     }
 

syn.json

@@ -2189,11 +2189,6 @@
           {
             "syn": "Pat"
           }
-        ],
-        "Ignored": [
-          {
-            "syn": "Type"
-          }
         ]
       }
     },

tests/debug/gen.rs

@@ -2164,13 +2164,6 @@ impl Debug for Lite<syn::FnArg> {
                 formatter.write_str(")")?;
                 Ok(())
             }
-            syn::FnArg::Ignored(_val) => {
-                formatter.write_str("Ignored")?;
-                formatter.write_str("(")?;
-                Debug::fmt(Lite(_val), formatter)?;
-                formatter.write_str(")")?;
-                Ok(())
-            }
         }
     }
 }

tests/repo/mod.rs

@@ -45,6 +45,11 @@ pub fn base_dir_filter(entry: &DirEntry) -> bool {
         "tests/rust/src/librustc_codegen_llvm/lib.rs" |
         // Deprecated placement syntax
         "tests/rust/src/test/ui/obsolete-in-place/bad.rs" |
+        // Deprecated anonymous parameter syntax in traits
+        "tests/rust/src/test/ui/error-codes/e0119/auxiliary/issue-23563-a.rs" |
+        "tests/rust/src/test/ui/issues/issue-13105.rs" |
+        "tests/rust/src/test/ui/issues/issue-13775.rs" |
+        "tests/rust/src/test/ui/issues/issue-34074.rs" |
         // 2015-style dyn that libsyntax rejects
         "tests/rust/src/test/ui/dyn-keyword/dyn-2015-no-warnings-without-lints.rs" |
         // not actually test cases