bjoernager/rust
bjoernager/rust
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Add Constructor::Never

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This commit is contained in:
Nadrieril 2024-01-31 00:57:56 +01:00
parent 844f173b5c
commit 1ec73d70fa
3 changed files with 15 additions and 8 deletions
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7
compiler/rustc_pattern_analysis/src/rustc.rs
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@ -251,7 +251,7 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
_ => bug!("bad slice pattern {:?} {:?}", ctor, ty),
},
Bool(..) | IntRange(..) | F32Range(..) | F64Range(..) | Str(..) | Opaque(..)
| NonExhaustive | Hidden | Missing | PrivateUninhabited | Wildcard => &[],
| Never | NonExhaustive | Hidden | Missing | PrivateUninhabited | Wildcard => &[],
Or => {
bug!("called `Fields::wildcards` on an `Or` ctor")
}
@ -279,7 +279,7 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
Ref => 1,
Slice(slice) => slice.arity(),
Bool(..) | IntRange(..) | F32Range(..) | F64Range(..) | Str(..) | Opaque(..)
| NonExhaustive | Hidden | Missing | PrivateUninhabited | Wildcard => 0,
| Never | NonExhaustive | Hidden | Missing | PrivateUninhabited | Wildcard => 0,
Or => bug!("The `Or` constructor doesn't have a fixed arity"),
}
}
@ -809,7 +809,8 @@ impl<'p, 'tcx: 'p> RustcMatchCheckCtxt<'p, 'tcx> {
}
}
&Str(value) => PatKind::Constant { value },
Wildcard | NonExhaustive | Hidden | PrivateUninhabited => PatKind::Wild,
Never if self.tcx.features().never_patterns => PatKind::Never,
Never | Wildcard | NonExhaustive | Hidden | PrivateUninhabited => PatKind::Wild,
Missing { .. } => bug!(
"trying to convert a `Missing` constructor into a `Pat`; this is probably a bug,
`Missing` should have been processed in `apply_constructors`"