X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Flibrustc_hir%2Fhir.rs;h=b62a7e413e3031b30b58ccd8aa04065fdfac7373;hb=e22ae2c096ed2b58ab0d6c029b8ae985a1749e1c;hp=550e3654d0800965d890d96ea4850048272c3c9d;hpb=34231d6c0b60fc65f29b3a8c3523e11ec91113f4;p=rust.git

diff --git a/src/librustc_hir/hir.rs b/src/librustc_hir/hir.rs
index 550e3654d08..b62a7e413e3 100644
--- a/src/librustc_hir/hir.rs
+++ b/src/librustc_hir/hir.rs
@@ -364,6 +364,7 @@ pub fn own_counts(&self) -> GenericParamCount {
 pub enum TraitBoundModifier {
     None,
     Maybe,
+    MaybeConst,
 }
 
 /// The AST represents all type param bounds as types.
@@ -377,6 +378,13 @@ pub enum GenericBound<'hir> {
 }
 
 impl GenericBound<'_> {
+    pub fn trait_def_id(&self) -> Option<DefId> {
+        match self {
+            GenericBound::Trait(data, _) => Some(data.trait_ref.trait_def_id()),
+            _ => None,
+        }
+    }
+
     pub fn span(&self) -> Span {
         match self {
             &GenericBound::Trait(ref t, ..) => t.span,
@@ -2429,15 +2437,19 @@ pub enum ItemKind<'hir> {
     TraitAlias(Generics<'hir>, GenericBounds<'hir>),
 
     /// An implementation, e.g., `impl<A> Trait for Foo { .. }`.
-    Impl(
-        Unsafety,
-        ImplPolarity,
-        Defaultness,
-        Generics<'hir>,
-        Option<TraitRef<'hir>>, // (optional) trait this impl implements
-        &'hir Ty<'hir>,         // self
-        &'hir [ImplItemRef<'hir>],
-    ),
+    Impl {
+        unsafety: Unsafety,
+        polarity: ImplPolarity,
+        defaultness: Defaultness,
+        constness: Constness,
+        generics: Generics<'hir>,
+
+        /// The trait being implemented, if any.
+        of_trait: Option<TraitRef<'hir>>,
+
+        self_ty: &'hir Ty<'hir>,
+        items: &'hir [ImplItemRef<'hir>],
+    },
 }
 
 impl ItemKind<'_> {
@@ -2458,7 +2470,7 @@ pub fn descriptive_variant(&self) -> &str {
             ItemKind::Union(..) => "union",
             ItemKind::Trait(..) => "trait",
             ItemKind::TraitAlias(..) => "trait alias",
-            ItemKind::Impl(..) => "impl",
+            ItemKind::Impl { .. } => "impl",
         }
     }
 
@@ -2471,7 +2483,7 @@ pub fn generics(&self) -> Option<&Generics<'_>> {
             | ItemKind::Struct(_, ref generics)
             | ItemKind::Union(_, ref generics)
             | ItemKind::Trait(_, _, ref generics, _, _)
-            | ItemKind::Impl(_, _, _, ref generics, _, _, _) => generics,
+            | ItemKind::Impl { ref generics, .. } => generics,
             _ => return None,
         })
     }