bjoernager/rust
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Move rustc-specific entrypoint to the rustc module

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This commit is contained in:
Nadrieril 2024-07-20 19:08:41 +02:00
parent 42103d69b7
commit bab8ede761
3 changed files with 39 additions and 40 deletions
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26
compiler/rustc_pattern_analysis/src/rustc.rs
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@ -20,6 +20,9 @@ use rustc_target::abi::{FieldIdx, Integer, VariantIdx, FIRST_VARIANT};
use crate::constructor::{
IntRange, MaybeInfiniteInt, OpaqueId, RangeEnd, Slice, SliceKind, VariantVisibility,
};
use crate::lints::lint_nonexhaustive_missing_variants;
use crate::pat_column::PatternColumn;
use crate::usefulness::{compute_match_usefulness, PlaceValidity};
use crate::{errors, Captures, PatCx, PrivateUninhabitedField};
use crate::constructor::Constructor::*;
@ -1058,3 +1061,26 @@ fn expand_or_pat<'p, 'tcx>(pat: &'p Pat<'tcx>) -> Vec<&'p Pat<'tcx>> {
expand(pat, &mut pats);
pats
}
/// The entrypoint for this crate. Computes whether a match is exhaustive and which of its arms are
/// useful, and runs some lints.
pub fn analyze_match<'p, 'tcx>(
tycx: &RustcPatCtxt<'p, 'tcx>,
arms: &[MatchArm<'p, 'tcx>],
scrut_ty: Ty<'tcx>,
pattern_complexity_limit: Option<usize>,
) -> Result<UsefulnessReport<'p, 'tcx>, ErrorGuaranteed> {
let scrut_ty = tycx.reveal_opaque_ty(scrut_ty);
let scrut_validity = PlaceValidity::from_bool(tycx.known_valid_scrutinee);
let report =
compute_match_usefulness(tycx, arms, scrut_ty, scrut_validity, pattern_complexity_limit)?;
// Run the non_exhaustive_omitted_patterns lint. Only run on refutable patterns to avoid hitting
// `if let`s. Only run if the match is exhaustive otherwise the error is redundant.
if tycx.refutable && report.non_exhaustiveness_witnesses.is_empty() {
let pat_column = PatternColumn::new(arms);
lint_nonexhaustive_missing_variants(tycx, arms, &pat_column, scrut_ty)?;
}
Ok(report)
}