use rustc_hir as hir;
use rustc_hir::intravisit;
use rustc_lint::{LateContext, LateLintPass, LintContext};
-use rustc_middle::hir::map::Map;
use rustc_middle::lint::in_external_macro;
use rustc_middle::ty;
use rustc_session::{declare_lint_pass, declare_tool_lint};
/// # let mut y = 1;
/// let x = &mut &mut y;
/// ```
+ #[clippy::version = "pre 1.29.0"]
pub MUT_MUT,
pedantic,
"usage of double-mut refs, e.g., `&mut &mut ...`"
}
impl<'a, 'tcx> intravisit::Visitor<'tcx> for MutVisitor<'a, 'tcx> {
- type Map = Map<'tcx>;
-
fn visit_expr(&mut self, expr: &'tcx hir::Expr<'_>) {
if in_external_macro(self.cx.sess(), expr.span) {
return;
}
- if let Some((_, arg, body, _)) = higher::for_loop(expr) {
+ if let Some(higher::ForLoop { arg, body, .. }) = higher::ForLoop::hir(expr) {
// A `for` loop lowers to:
// ```rust
// match ::std::iter::Iterator::next(&mut iter) {
}
fn visit_ty(&mut self, ty: &'tcx hir::Ty<'_>) {
+ if in_external_macro(self.cx.sess(), ty.span) {
+ return;
+ }
+
if let hir::TyKind::Rptr(
_,
hir::MutTy {
intravisit::walk_ty(self, ty);
}
- fn nested_visit_map(&mut self) -> intravisit::NestedVisitorMap<Self::Map> {
- intravisit::NestedVisitorMap::None
- }
}