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Make sure we keep emitting a hard error

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This commit is contained in:
Oliver Scherer 2020-09-23 18:36:53 +02:00
parent 017423179a
commit da217644a1
3 changed files with 37 additions and 31 deletions
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54
compiler/rustc_mir_build/src/thir/pattern/const_to_pat.rs
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@ -409,25 +409,43 @@ impl<'a, 'tcx> ConstToPat<'a, 'tcx> {
// reference. This makes the rest of the matching logic simpler as it doesn't have
// to figure out how to get a reference again.
ty::Adt(adt_def, _) if !self.type_marked_structural(pointee_ty) => {
if self.include_lint_checks
&& !self.saw_const_match_error.get()
&& !self.saw_const_match_lint.get()
{
self.saw_const_match_lint.set(true);
let path = self.tcx().def_path_str(adt_def.did);
let msg = format!(
"to use a constant of type `{}` in a pattern, \
`{}` must be annotated with `#[derive(PartialEq, Eq)]`",
path, path,
);
self.tcx().struct_span_lint_hir(
lint::builtin::INDIRECT_STRUCTURAL_MATCH,
self.id,
self.span,
|lint| lint.build(&msg).emit(),
);
if self.behind_reference.get() {
if self.include_lint_checks
&& !self.saw_const_match_error.get()
&& !self.saw_const_match_lint.get()
{
self.saw_const_match_lint.set(true);
let path = self.tcx().def_path_str(adt_def.did);
let msg = format!(
"to use a constant of type `{}` in a pattern, \
`{}` must be annotated with `#[derive(PartialEq, Eq)]`",
path, path,
);
self.tcx().struct_span_lint_hir(
lint::builtin::INDIRECT_STRUCTURAL_MATCH,
self.id,
self.span,
|lint| lint.build(&msg).emit(),
);
}
PatKind::Constant { value: cv }
} else {
if !self.saw_const_match_error.get() {
self.saw_const_match_error.set(true);
let path = self.tcx().def_path_str(adt_def.did);
let msg = format!(
"to use a constant of type `{}` in a pattern, \
`{}` must be annotated with `#[derive(PartialEq, Eq)]`",
path, path,
);
if self.include_lint_checks {
tcx.sess.span_err(span, &msg);
} else {
tcx.sess.delay_span_bug(span, &msg)
}
}
PatKind::Wild
}
PatKind::Constant { value: cv }
}
// All other references are converted into deref patterns and then recursively
// convert the dereferenced constant to a pattern that is the sub-pattern of the