Rollup merge of #68279 - GuillaumeGomez:clean-up-e0198, r=Dylan-DPC

[rust.git] / src / librustc_hir / hir.rs

diff --git a/src/librustc_hir/hir.rs b/src/librustc_hir/hir.rs
index 2303a85df4acfb56ee7e16b5e422d36dbedad54c..1fef871b5140e41ad2b24b94b3cec134c0ef493c 100644 (file)
--- a/src/librustc_hir/hir.rs
+++ b/src/librustc_hir/hir.rs
@@ -377,6 +377,13 @@ 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,
@@ -905,7 +912,7 @@ pub enum PatKind<'hir> {
     Lit(&'hir Expr<'hir>),
 
     /// A range pattern (e.g., `1..=2` or `1..2`).
-    Range(&'hir Expr<'hir>, &'hir Expr<'hir>, RangeEnd),
+    Range(Option<&'hir Expr<'hir>>, Option<&'hir Expr<'hir>>, RangeEnd),
 
     /// A slice pattern, `[before_0, ..., before_n, (slice, after_0, ..., after_n)?]`.
     ///
@@ -1875,6 +1882,9 @@ pub enum ImplItemKind<'hir> {
     OpaqueTy(GenericBounds<'hir>),
 }
 
+// The name of the associated type for `Fn` return types.
+pub const FN_OUTPUT_NAME: Symbol = sym::Output;
+
 /// Bind a type to an associated type (i.e., `A = Foo`).
 ///
 /// Bindings like `A: Debug` are represented as a special type `A =
@@ -2426,15 +2436,18 @@ 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,
+        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<'_> {
@@ -2455,7 +2468,7 @@ pub fn descriptive_variant(&self) -> &str {
             ItemKind::Union(..) => "union",
             ItemKind::Trait(..) => "trait",
             ItemKind::TraitAlias(..) => "trait alias",
-            ItemKind::Impl(..) => "impl",
+            ItemKind::Impl { .. } => "impl",
         }
     }
 
@@ -2468,7 +2481,7 @@ 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,
         })
     }