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This commit is contained in:
Manish Goregaokar 2017-09-25 18:39:50 -07:00
parent bfc31536c7
commit 94c6f4a868
1 changed files with 12 additions and 15 deletions
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27
clippy_lints/src/loops.rs
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@ -1328,18 +1328,15 @@ impl<'tcx> Delegate<'tcx> for MutateDelegate {
}
fn borrow(&mut self, _: NodeId, sp: Span, cmt: cmt<'tcx>, _: ty::Region, bk: ty::BorrowKind, _: LoanCause) {
match bk {
ty::BorrowKind::MutBorrow => {
if let Categorization::Local(id) = cmt.cat {
if Some(id) == self.node_id_low {
self.span_low = Some(sp)
}
if Some(id) == self.node_id_high {
self.span_high = Some(sp)
}
if let ty::BorrowKind::MutBorrow = bk {
if let Categorization::Local(id) = cmt.cat {
if Some(id) == self.node_id_low {
self.span_low = Some(sp)
}
},
_ => (),
if Some(id) == self.node_id_high {
self.span_high = Some(sp)
}
}
}
}
@ -1368,7 +1365,7 @@ fn check_for_mut_range_bound(cx: &LateContext, arg: &Expr, body: &Expr) {
if let Some(higher::Range { start: Some(start), end: Some(end), .. }) = higher::range(arg) {
let mut_ids = vec![check_for_mutability(cx, start), check_for_mutability(cx, end)];
if mut_ids[0].is_some() || mut_ids[1].is_some() {
let (span_low, span_high) = check_for_mutation(cx, body, mut_ids);
let (span_low, span_high) = check_for_mutation(cx, body, &mut_ids);
mut_warn_with_span(cx, span_low);
mut_warn_with_span(cx, span_high);
}
@ -1398,15 +1395,15 @@ fn check_for_mutability(cx: &LateContext, bound: &Expr) -> Option<NodeId> {
}}
}
}}
return None;
None
}
fn check_for_mutation(cx: &LateContext, body: &Expr, bound_ids: Vec<Option<NodeId>>) -> (Option<Span>, Option<Span>) {
fn check_for_mutation(cx: &LateContext, body: &Expr, bound_ids: &[Option<NodeId>]) -> (Option<Span>, Option<Span>) {
let mut delegate = MutateDelegate { node_id_low: bound_ids[0], node_id_high: bound_ids[1], span_low: None, span_high: None };
let def_id = def_id::DefId::local(body.hir_id.owner);
let region_scope_tree = &cx.tcx.region_scope_tree(def_id);
ExprUseVisitor::new(&mut delegate, cx.tcx, cx.param_env, region_scope_tree, cx.tables).walk_expr(body);
return delegate.mutation_span();
delegate.mutation_span()
}
/// Return true if the pattern is a `PatWild` or an ident prefixed with `'_'`.