New upstream version 1.64.0+dfsg1

[rustc.git] / compiler / rustc_builtin_macros / src / deriving / decodable.rs

diff --git a/compiler/rustc_builtin_macros/src/deriving/decodable.rs b/compiler/rustc_builtin_macros/src/deriving/decodable.rs
index 1d892b20729d5d830d6730c26c3cf5b66f926616..d688143a2a5c622e56102406b81ca1bee70b1fbe 100644 (file)
--- a/compiler/rustc_builtin_macros/src/deriving/decodable.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/decodable.rs
@@ -23,40 +23,32 @@ pub fn expand_deriving_rustc_decodable(
     let trait_def = TraitDef {
         span,
         attributes: Vec::new(),
-        path: Path::new_(vec![krate, sym::Decodable], None, vec![], PathKind::Global),
+        path: Path::new_(vec![krate, sym::Decodable], vec![], PathKind::Global),
         additional_bounds: Vec::new(),
         generics: Bounds::empty(),
-        is_unsafe: false,
         supports_unions: false,
         methods: vec![MethodDef {
             name: sym::decode,
             generics: Bounds {
                 bounds: vec![(
                     typaram,
-                    vec![Path::new_(vec![krate, sym::Decoder], None, vec![], PathKind::Global)],
+                    vec![Path::new_(vec![krate, sym::Decoder], vec![], PathKind::Global)],
                 )],
             },
-            explicit_self: None,
-            args: vec![(
-                Ptr(Box::new(Literal(Path::new_local(typaram))), Borrowed(None, Mutability::Mut)),
+            explicit_self: false,
+            nonself_args: vec![(
+                Ref(Box::new(Path(Path::new_local(typaram))), Mutability::Mut),
                 sym::d,
             )],
-            ret_ty: Literal(Path::new_(
+            ret_ty: Path(Path::new_(
                 pathvec_std!(result::Result),
-                None,
                 vec![
                     Box::new(Self_),
-                    Box::new(Literal(Path::new_(
-                        vec![typaram, sym::Error],
-                        None,
-                        vec![],
-                        PathKind::Local,
-                    ))),
+                    Box::new(Path(Path::new_(vec![typaram, sym::Error], vec![], PathKind::Local))),
                 ],
                 PathKind::Std,
             )),
             attributes: Vec::new(),
-            is_unsafe: false,
             unify_fieldless_variants: false,
             combine_substructure: combine_substructure(Box::new(|a, b, c| {
                 decodable_substructure(a, b, c, krate)
@@ -73,8 +65,8 @@ fn decodable_substructure(
     trait_span: Span,
     substr: &Substructure<'_>,
     krate: Symbol,
-) -> P<Expr> {
-    let decoder = substr.nonself_args[0].clone();
+) -> BlockOrExpr {
+    let decoder = substr.nonselflike_args[0].clone();
     let recurse = vec![
         Ident::new(krate, trait_span),
         Ident::new(sym::Decodable, trait_span),
@@ -85,7 +77,7 @@ fn decodable_substructure(
     let blkarg = Ident::new(sym::_d, trait_span);
     let blkdecoder = cx.expr_ident(trait_span, blkarg);
 
-    match *substr.fields {
+    let expr = match *substr.fields {
         StaticStruct(_, ref summary) => {
             let nfields = match *summary {
                 Unnamed(ref fields, _) => fields.len(),
@@ -162,14 +154,13 @@ fn decodable_substructure(
                 cx.expr_match(trait_span, cx.expr_ident(trait_span, variant), arms),
             );
             let lambda = cx.lambda(trait_span, vec![blkarg, variant], result);
-            let variant_vec = cx.expr_vec(trait_span, variants);
-            let variant_vec = cx.expr_addr_of(trait_span, variant_vec);
+            let variant_array_ref = cx.expr_array_ref(trait_span, variants);
             let fn_read_enum_variant_path: Vec<_> =
                 cx.def_site_path(&[sym::rustc_serialize, sym::Decoder, sym::read_enum_variant]);
             let result = cx.expr_call_global(
                 trait_span,
                 fn_read_enum_variant_path,
-                vec![blkdecoder, variant_vec, lambda],
+                vec![blkdecoder, variant_array_ref, lambda],
             );
             let fn_read_enum_path: Vec<_> =
                 cx.def_site_path(&[sym::rustc_serialize, sym::Decoder, sym::read_enum]);
@@ -185,7 +176,8 @@ fn decodable_substructure(
             )
         }
         _ => cx.bug("expected StaticEnum or StaticStruct in derive(Decodable)"),
-    }
+    };
+    BlockOrExpr::new_expr(expr)
 }
 
 /// Creates a decoder for a single enum variant/struct: