use rustc::middle::mem_categorization::Categorization;
use rustc::ty;
use rustc_data_structures::fx::FxHashSet;
-use syntax::source_map::Span;
/// Returns a set of mutated local variable IDs, or `None` if mutations could not be determined.
-pub fn mutated_variables<'a, 'tcx: 'a>(expr: &'tcx Expr, cx: &'a LateContext<'a, 'tcx>) -> Option<FxHashSet<HirId>> {
+pub fn mutated_variables<'a, 'tcx>(expr: &'tcx Expr, cx: &'a LateContext<'a, 'tcx>) -> Option<FxHashSet<HirId>> {
let mut delegate = MutVarsDelegate {
used_mutably: FxHashSet::default(),
skip: false,
cx.param_env,
region_scope_tree,
cx.tables,
- None,
)
.walk_expr(expr);
Some(delegate.used_mutably)
}
-pub fn is_potentially_mutated<'a, 'tcx: 'a>(
- variable: &'tcx Path,
- expr: &'tcx Expr,
- cx: &'a LateContext<'a, 'tcx>,
-) -> bool {
+pub fn is_potentially_mutated<'a, 'tcx>(variable: &'tcx Path, expr: &'tcx Expr, cx: &'a LateContext<'a, 'tcx>) -> bool {
if let Res::Local(id) = variable.res {
mutated_variables(expr, cx).map_or(true, |mutated| mutated.contains(&id))
} else {
- return true;
+ true
}
}
}
impl<'tcx> Delegate<'tcx> for MutVarsDelegate {
- fn consume(&mut self, _: HirId, _: Span, _: &cmt_<'tcx>, _: ConsumeMode) {}
+ fn consume(&mut self, _: &cmt_<'tcx>, _: ConsumeMode) {}
- fn matched_pat(&mut self, _: &Pat, _: &cmt_<'tcx>, _: MatchMode) {}
-
- fn consume_pat(&mut self, _: &Pat, _: &cmt_<'tcx>, _: ConsumeMode) {}
-
- fn borrow(&mut self, _: HirId, _: Span, cmt: &cmt_<'tcx>, _: ty::Region<'_>, bk: ty::BorrowKind, _: LoanCause) {
+ fn borrow(&mut self, cmt: &cmt_<'tcx>, bk: ty::BorrowKind) {
if let ty::BorrowKind::MutBorrow = bk {
self.update(&cmt.cat)
}
}
- fn mutate(&mut self, _: HirId, _: Span, cmt: &cmt_<'tcx>, _: MutateMode) {
+ fn mutate(&mut self, cmt: &cmt_<'tcx>) {
self.update(&cmt.cat)
}
-
- fn decl_without_init(&mut self, _: HirId, _: Span) {}
}