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Diffstat (limited to 'crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs')
| -rw-r--r-- | crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs b/crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs index 81ce51429c..f45beb4c92 100644 --- a/crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs +++ b/crates/hir-ty/src/diagnostics/match_check/pat_analysis.rs @@ -8,6 +8,7 @@ use rustc_hash::FxHashMap; use rustc_pattern_analysis::{ constructor::{Constructor, ConstructorSet, VariantVisibility}, index::IdxContainer, + usefulness::{compute_match_usefulness, PlaceValidity, UsefulnessReport}, Captures, PatCx, PrivateUninhabitedField, }; use smallvec::{smallvec, SmallVec}; @@ -59,6 +60,18 @@ impl<'p> MatchCheckCtx<'p> { Self { module, body, db, exhaustive_patterns, min_exhaustive_patterns } } + pub(crate) fn compute_match_usefulness( + &self, + arms: &[MatchArm<'p>], + scrut_ty: Ty, + ) -> Result<UsefulnessReport<'p, Self>, ()> { + // FIXME: Determine place validity correctly. For now, err on the safe side. + let place_validity = PlaceValidity::MaybeInvalid; + // Measured to take ~100ms on modern hardware. + let complexity_limit = Some(500000); + compute_match_usefulness(self, arms, scrut_ty, place_validity, complexity_limit) + } + fn is_uninhabited(&self, ty: &Ty) -> bool { is_ty_uninhabited_from(ty, self.module, self.db) } @@ -465,7 +478,6 @@ impl<'p> PatCx for MatchCheckCtx<'p> { } fn complexity_exceeded(&self) -> Result<(), Self::Error> { - // FIXME(Nadrieril): make use of the complexity counter. Err(()) } } |