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give correct error message on structural match violation

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b-naber 2022-05-24 13:00:46 +02:00
parent c186f7c079
commit e2e425e8d2
4 changed files with 48 additions and 28 deletions
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18
compiler/rustc_mir_build/src/thir/pattern/const_to_pat.rs
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@ -121,27 +121,27 @@ impl<'a, 'tcx> ConstToPat<'a, 'tcx> {
fn search_for_structural_match_violation(&self, ty: Ty<'tcx>) -> Option<String> {
traits::search_for_structural_match_violation(self.span, self.tcx(), ty).map(|non_sm_ty| {
with_no_trimmed_paths!(match non_sm_ty {
traits::NonStructuralMatchTy::Adt(adt) => self.adt_derive_msg(adt),
traits::NonStructuralMatchTy::Dynamic => {
with_no_trimmed_paths!(match non_sm_ty.kind {
traits::NonStructuralMatchTyKind::Adt(adt) => self.adt_derive_msg(adt),
traits::NonStructuralMatchTyKind::Dynamic => {
"trait objects cannot be used in patterns".to_string()
}
traits::NonStructuralMatchTy::Opaque => {
traits::NonStructuralMatchTyKind::Opaque => {
"opaque types cannot be used in patterns".to_string()
}
traits::NonStructuralMatchTy::Closure => {
traits::NonStructuralMatchTyKind::Closure => {
"closures cannot be used in patterns".to_string()
}
traits::NonStructuralMatchTy::Generator => {
traits::NonStructuralMatchTyKind::Generator => {
"generators cannot be used in patterns".to_string()
}
traits::NonStructuralMatchTy::Param => {
traits::NonStructuralMatchTyKind::Param => {
bug!("use of a constant whose type is a parameter inside a pattern")
}
traits::NonStructuralMatchTy::Projection => {
traits::NonStructuralMatchTyKind::Projection => {
bug!("use of a constant whose type is a projection inside a pattern")
}
traits::NonStructuralMatchTy::Foreign => {
traits::NonStructuralMatchTyKind::Foreign => {
bug!("use of a value of a foreign type inside a pattern")
}
})