diff options
Diffstat (limited to 'compiler/rustc_pattern_analysis/src/lib.rs')
| -rw-r--r-- | compiler/rustc_pattern_analysis/src/lib.rs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/compiler/rustc_pattern_analysis/src/lib.rs b/compiler/rustc_pattern_analysis/src/lib.rs index 66df35f9ee4..d9bb93a829b 100644 --- a/compiler/rustc_pattern_analysis/src/lib.rs +++ b/compiler/rustc_pattern_analysis/src/lib.rs @@ -57,6 +57,13 @@ pub trait PatCx: Sized + fmt::Debug { fn is_exhaustive_patterns_feature_on(&self) -> bool; + /// Whether to ensure the non-exhaustiveness witnesses we report for a complete set. This is + /// `false` by default to avoid some exponential blowup cases such as + /// <https://github.com/rust-lang/rust/issues/118437>. + fn exhaustive_witnesses(&self) -> bool { + false + } + /// The number of fields for this constructor. fn ctor_arity(&self, ctor: &Constructor<Self>, ty: &Self::Ty) -> usize; |