Merging upstream version 1.67.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 12 insertions, 11 deletions

diff --git a/compiler/rustc_builtin_macros/src/deriving/decodable.rs b/compiler/rustc_builtin_macros/src/deriving/decodable.rs
index d669f6168..62af02c2b 100644
--- a/compiler/rustc_builtin_macros/src/deriving/decodable.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/decodable.rs
@@ -16,6 +16,7 @@ pub fn expand_deriving_rustc_decodable(
     mitem: &MetaItem,
     item: &Annotatable,
     push: &mut dyn FnMut(Annotatable),
+    is_const: bool,
 ) {
     let krate = sym::rustc_serialize;
     let typaram = sym::__D;
@@ -25,7 +26,6 @@ pub fn expand_deriving_rustc_decodable(
         path: Path::new_(vec![krate, sym::Decodable], vec![], PathKind::Global),
         skip_path_as_bound: false,
         additional_bounds: Vec::new(),
-        generics: Bounds::empty(),
         supports_unions: false,
         methods: vec![MethodDef {
             name: sym::decode,
@@ -55,6 +55,7 @@ pub fn expand_deriving_rustc_decodable(
             })),
         }],
         associated_types: Vec::new(),
+        is_const,
     };
 
     trait_def.expand(cx, mitem, item, push)
@@ -77,11 +78,11 @@ fn decodable_substructure(
     let blkarg = Ident::new(sym::_d, trait_span);
     let blkdecoder = cx.expr_ident(trait_span, blkarg);
 
-    let expr = match *substr.fields {
-        StaticStruct(_, ref summary) => {
-            let nfields = match *summary {
-                Unnamed(ref fields, _) => fields.len(),
-                Named(ref fields) => fields.len(),
+    let expr = match substr.fields {
+        StaticStruct(_, summary) => {
+            let nfields = match summary {
+                Unnamed(fields, _) => fields.len(),
+                Named(fields) => fields.len(),
             };
             let fn_read_struct_field_path: Vec<_> =
                 cx.def_site_path(&[sym::rustc_serialize, sym::Decoder, sym::read_struct_field]);
@@ -118,7 +119,7 @@ fn decodable_substructure(
                 ],
             )
         }
-        StaticEnum(_, ref fields) => {
+        StaticEnum(_, fields) => {
             let variant = Ident::new(sym::i, trait_span);
 
             let mut arms = Vec::with_capacity(fields.len() + 1);
@@ -193,10 +194,10 @@ fn decode_static_fields<F>(
 where
     F: FnMut(&mut ExtCtxt<'_>, Span, Symbol, usize) -> P<Expr>,
 {
-    match *fields {
-        Unnamed(ref fields, is_tuple) => {
+    match fields {
+        Unnamed(fields, is_tuple) => {
             let path_expr = cx.expr_path(outer_pat_path);
-            if !is_tuple {
+            if !*is_tuple {
                 path_expr
             } else {
                 let fields = fields
@@ -208,7 +209,7 @@ where
                 cx.expr_call(trait_span, path_expr, fields)
             }
         }
-        Named(ref fields) => {
+        Named(fields) => {
             // use the field's span to get nicer error messages.
             let fields = fields
                 .iter()