diff options
| -rw-r--r-- | src/librustc_mir/hair/pattern/mod.rs | 26 |
1 files changed, 12 insertions, 14 deletions
diff --git a/src/librustc_mir/hair/pattern/mod.rs b/src/librustc_mir/hair/pattern/mod.rs index 817ba67c763..888f4b8e115 100644 --- a/src/librustc_mir/hair/pattern/mod.rs +++ b/src/librustc_mir/hair/pattern/mod.rs @@ -557,21 +557,19 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> { } hir::PatKind::Tuple(ref subpatterns, ddpos) => { - match ty.kind { - ty::Tuple(ref tys) => { - let subpatterns = - subpatterns.iter() - .enumerate_and_adjust(tys.len(), ddpos) - .map(|(i, subpattern)| FieldPat { - field: Field::new(i), - pattern: self.lower_pattern(subpattern) - }) - .collect(); - - PatKind::Leaf { subpatterns } - } + let tys = match ty.kind { + ty::Tuple(ref tys) => tys, _ => span_bug!(pat.span, "unexpected type for tuple pattern: {:?}", ty), - } + }; + let subpatterns = subpatterns + .iter() + .enumerate_and_adjust(tys.len(), ddpos) + .map(|(i, subpattern)| FieldPat { + field: Field::new(i), + pattern: self.lower_pattern(subpattern) + }) + .collect(); + PatKind::Leaf { subpatterns } } hir::PatKind::Binding(_, id, ident, ref sub) => { |