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Consistently set MatchVisitor.error on error

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This commit is contained in:
Nadrieril 2024-01-18 14:45:41 +01:00
parent 12ebc3dd96
commit 753680afe8
1 changed files with 16 additions and 12 deletions
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28
compiler/rustc_mir_build/src/thir/pattern/check_match.rs
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@ -1,9 +1,8 @@
use rustc_pattern_analysis::errors::Uncovered;
use rustc_pattern_analysis::rustc::{
Constructor, DeconstructedPat, RustcMatchCheckCtxt as MatchCheckCtxt, Usefulness,
Constructor, DeconstructedPat, MatchArm, RustcMatchCheckCtxt as MatchCheckCtxt, Usefulness,
UsefulnessReport, WitnessPat,
};
use rustc_pattern_analysis::{analyze_match, MatchArm};
use crate::errors::*;
@ -386,6 +385,18 @@ impl<'p, 'tcx> MatchVisitor<'p, 'tcx> {
}
}
fn analyze_patterns(
&mut self,
cx: &MatchCheckCtxt<'p, 'tcx>,
arms: &[MatchArm<'p, 'tcx>],
scrut_ty: Ty<'tcx>,
) -> Result<UsefulnessReport<'p, 'tcx>, ErrorGuaranteed> {
rustc_pattern_analysis::analyze_match(&cx, &arms, scrut_ty).map_err(|err| {
self.error = Err(err);
err
})
}
#[instrument(level = "trace", skip(self))]
fn check_let(&mut self, pat: &'p Pat<'tcx>, scrutinee: Option<ExprId>, span: Span) {
assert!(self.let_source != LetSource::None);
@ -431,14 +442,7 @@ impl<'p, 'tcx> MatchVisitor<'p, 'tcx> {
}
}
let scrut_ty = scrut.ty;
let report = match analyze_match(&cx, &tarms, scrut_ty) {
Ok(report) => report,
Err(err) => {
self.error = Err(err);
return;
}
};
let Ok(report) = self.analyze_patterns(&cx, &tarms, scrut.ty) else { return };
match source {
// Don't report arm reachability of desugared `match $iter.into_iter() { iter => .. }`
@ -470,7 +474,7 @@ impl<'p, 'tcx> MatchVisitor<'p, 'tcx> {
);
} else {
self.error = Err(report_non_exhaustive_match(
&cx, self.thir, scrut_ty, scrut.span, witnesses, arms, expr_span,
&cx, self.thir, scrut.ty, scrut.span, witnesses, arms, expr_span,
));
}
}
@ -552,7 +556,7 @@ impl<'p, 'tcx> MatchVisitor<'p, 'tcx> {
let cx = self.new_cx(refutability, None, scrut, pat.span);
let pat = self.lower_pattern(&cx, pat)?;
let arms = [MatchArm { pat, arm_data: self.lint_level, has_guard: false }];
let report = analyze_match(&cx, &arms, pat.ty().inner())?;
let report = self.analyze_patterns(&cx, &arms, pat.ty().inner())?;
Ok((cx, report))
}