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Repurpose MatchCtxt for usefulness only

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This commit is contained in:
Nadrieril 2024-01-24 20:57:11 +01:00
parent cb0e8c508c
commit 83e88c6dfc
2 changed files with 21 additions and 23 deletions
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18
compiler/rustc_pattern_analysis/src/lib.rs
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@ -135,20 +135,6 @@ pub trait TypeCx: Sized + fmt::Debug {
}
}
/// Context that provides information global to a match.
pub struct MatchCtxt<'a, Cx: TypeCx> {
/// The context for type information.
pub tycx: &'a Cx,
}
impl<'a, Cx: TypeCx> Clone for MatchCtxt<'a, Cx> {
fn clone(&self) -> Self {
Self { tycx: self.tycx }
}
}
impl<'a, Cx: TypeCx> Copy for MatchCtxt<'a, Cx> {}
/// The arm of a match expression.
#[derive(Debug)]
pub struct MatchArm<'p, Cx: TypeCx> {
@ -175,9 +161,7 @@ pub fn analyze_match<'p, 'tcx>(
) -> Result<rustc::UsefulnessReport<'p, 'tcx>, ErrorGuaranteed> {
let scrut_ty = tycx.reveal_opaque_ty(scrut_ty);
let scrut_validity = ValidityConstraint::from_bool(tycx.known_valid_scrutinee);
let cx = MatchCtxt { tycx };
let report = compute_match_usefulness(cx, arms, scrut_ty, scrut_validity)?;
let report = compute_match_usefulness(tycx, arms, scrut_ty, scrut_validity)?;
// 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.