diff options
Diffstat (limited to 'compiler/rustc_hir/src')
| -rw-r--r-- | compiler/rustc_hir/src/hir.rs | 6 | ||||
| -rw-r--r-- | compiler/rustc_hir/src/intravisit.rs | 2 |
2 files changed, 6 insertions, 2 deletions
diff --git a/compiler/rustc_hir/src/hir.rs b/compiler/rustc_hir/src/hir.rs index 751c379b21a..08e37accb8a 100644 --- a/compiler/rustc_hir/src/hir.rs +++ b/compiler/rustc_hir/src/hir.rs @@ -1516,6 +1516,7 @@ impl<'hir> Pat<'hir> { use PatKind::*; match self.kind { + Missing => unreachable!(), Wild | Never | Expr(_) | Range(..) | Binding(.., None) | Err(_) => true, Box(s) | Deref(s) | Ref(s, _) | Binding(.., Some(s)) | Guard(s, _) => s.walk_short_(it), Struct(_, fields, _) => fields.iter().all(|field| field.pat.walk_short_(it)), @@ -1543,7 +1544,7 @@ impl<'hir> Pat<'hir> { use PatKind::*; match self.kind { - Wild | Never | Expr(_) | Range(..) | Binding(.., None) | Err(_) => {} + Missing | Wild | Never | Expr(_) | Range(..) | Binding(.., None) | Err(_) => {} Box(s) | Deref(s) | Ref(s, _) | Binding(.., Some(s)) | Guard(s, _) => s.walk_(it), Struct(_, fields, _) => fields.iter().for_each(|field| field.pat.walk_(it)), TupleStruct(_, s, _) | Tuple(s, _) | Or(s) => s.iter().for_each(|p| p.walk_(it)), @@ -1681,6 +1682,9 @@ pub enum TyPatKind<'hir> { #[derive(Debug, Clone, Copy, HashStable_Generic)] pub enum PatKind<'hir> { + /// A missing pattern, e.g. for an anonymous param in a bare fn like `fn f(u32)`. + Missing, + /// Represents a wildcard pattern (i.e., `_`). Wild, diff --git a/compiler/rustc_hir/src/intravisit.rs b/compiler/rustc_hir/src/intravisit.rs index 506358341b5..ea3f396761b 100644 --- a/compiler/rustc_hir/src/intravisit.rs +++ b/compiler/rustc_hir/src/intravisit.rs @@ -744,7 +744,7 @@ pub fn walk_pat<'v, V: Visitor<'v>>(visitor: &mut V, pattern: &'v Pat<'v>) -> V: visit_opt!(visitor, visit_pat_expr, lower_bound); visit_opt!(visitor, visit_pat_expr, upper_bound); } - PatKind::Never | PatKind::Wild | PatKind::Err(_) => (), + PatKind::Missing | PatKind::Never | PatKind::Wild | PatKind::Err(_) => (), PatKind::Slice(prepatterns, ref slice_pattern, postpatterns) => { walk_list!(visitor, visit_pat, prepatterns); visit_opt!(visitor, visit_pat, slice_pattern); |