use clippy_utils::{fn_def_id, get_parent_expr, is_diag_item_method, is_diag_trait_item, return_ty};
use clippy_utils::{meets_msrv, msrvs};
use rustc_errors::Applicability;
-use rustc_hir::{def_id::DefId, BorrowKind, Expr, ExprKind, ItemKind, Node};
+use rustc_hir::{def_id::DefId, BorrowKind, Expr, ExprKind, ItemKind, LangItem, Node};
use rustc_infer::infer::TyCtxtInferExt;
use rustc_lint::LateContext;
use rustc_middle::mir::Mutability;
// We can't add an `&` when the trait is `Deref` because `Target = &T` won't match
// `Target = T`.
if n_refs > 0 || is_copy(cx, receiver_ty) || trait_predicate.def_id() != deref_trait_id;
- let n_refs = max(n_refs, if is_copy(cx, receiver_ty) { 0 } else { 1 });
+ let n_refs = max(n_refs, usize::from(!is_copy(cx, receiver_ty)));
if let Some(receiver_snippet) = snippet_opt(cx, receiver.span);
then {
span_lint_and_sugg(
Node::Expr(parent_expr) => {
if let Some((callee_def_id, call_substs, recv, call_args)) = get_callee_substs_and_args(cx, parent_expr)
{
+ if cx.tcx.lang_items().require(LangItem::IntoFutureIntoFuture) == Ok(callee_def_id) {
+ return false;
+ }
+
let fn_sig = cx.tcx.fn_sig(callee_def_id).skip_binder();
if let Some(arg_index) = recv.into_iter().chain(call_args).position(|arg| arg.hir_id == expr.hir_id)
&& let Some(param_ty) = fn_sig.inputs().get(arg_index)