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Test validity of pattern types

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This commit is contained in:
Oli Scherer 2025-01-27 16:36:45 +00:00
parent e1f09207fb
commit 2f2b32b84e
3 changed files with 128 additions and 0 deletions
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12
compiler/rustc_const_eval/src/interpret/validity.rs
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@ -4,6 +4,7 @@
//! That's useful because it means other passes (e.g. promotion) can rely on `const`s
//! to be const-safe.
use std::assert_matches::assert_matches;
use std::borrow::Cow;
use std::fmt::Write;
use std::hash::Hash;
@ -1240,6 +1241,17 @@ impl<'rt, 'tcx, M: Machine<'tcx>> ValueVisitor<'tcx, M> for ValidityVisitor<'rt,
self.visit_field(val, 0, &self.ecx.project_index(val, 0)?)?;
}
}
ty::Pat(_base, pat) => {
// When you extend this match, make sure to also add tests to
// tests/ui/type/pattern_types/validity.rs((
match **pat {
// Range patterns are precisely reflected into `valid_range` and thus
// handled fully by `visit_scalar` (called below).
ty::PatternKind::Range { .. } => {
assert_matches!(val.layout.backend_repr, BackendRepr::Scalar(_));
},
}
}
_ => {
// default handler
try_validation!(