Auto merge of #12851 - samueltardieu:issue12846, r=y21

Add required parentheses around method receiver

Fix #12846

changelog: [`needless_bool`]: Add missing parentheses around method receiver

2 files changed, 11 insertions, 14 deletions

diff --git a/clippy_lints/src/methods/search_is_some.rs b/clippy_lints/src/methods/search_is_some.rs
index f5f1e94bbf4..3b2dd285b8c 100644
--- a/clippy_lints/src/methods/search_is_some.rs
+++ b/clippy_lints/src/methods/search_is_some.rs
@@ -2,7 +2,7 @@ use clippy_utils::diagnostics::{span_lint_and_help, span_lint_and_sugg};
 use clippy_utils::source::{snippet, snippet_with_applicability};
 use clippy_utils::sugg::deref_closure_args;
 use clippy_utils::ty::is_type_lang_item;
-use clippy_utils::{get_parent_expr, is_trait_method, strip_pat_refs};
+use clippy_utils::{is_receiver_of_method_call, is_trait_method, strip_pat_refs};
 use hir::ExprKind;
 use rustc_errors::Applicability;
 use rustc_hir as hir;
@@ -156,13 +156,3 @@ pub(super) fn check<'tcx>(
         }
     }
 }
-
-fn is_receiver_of_method_call(cx: &LateContext<'_>, expr: &hir::Expr<'_>) -> bool {
-    if let Some(parent_expr) = get_parent_expr(cx, expr)
-        && let ExprKind::MethodCall(_, receiver, ..) = parent_expr.kind
-        && receiver.hir_id == expr.hir_id
-    {
-        return true;
-    }
-    false
-}
diff --git a/clippy_lints/src/needless_bool.rs b/clippy_lints/src/needless_bool.rs
index e1866eaa18a..9cb4fa41c73 100644
--- a/clippy_lints/src/needless_bool.rs
+++ b/clippy_lints/src/needless_bool.rs
@@ -6,8 +6,8 @@ use clippy_utils::diagnostics::{span_lint, span_lint_and_sugg};
 use clippy_utils::source::snippet_with_applicability;
 use clippy_utils::sugg::Sugg;
 use clippy_utils::{
-    higher, is_block_like, is_else_clause, is_expn_of, is_parent_stmt, peel_blocks, peel_blocks_with_stmt,
-    span_extract_comment, SpanlessEq,
+    get_parent_expr, higher, is_block_like, is_else_clause, is_expn_of, is_parent_stmt, is_receiver_of_method_call,
+    peel_blocks, peel_blocks_with_stmt, span_extract_comment, SpanlessEq,
 };
 use rustc_ast::ast::LitKind;
 use rustc_errors::Applicability;
@@ -154,7 +154,10 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessBool {
                     snip = snip.blockify();
                 }
 
-                if condition_needs_parentheses(cond) && is_parent_stmt(cx, e.hir_id) {
+                if (condition_needs_parentheses(cond) && is_parent_stmt(cx, e.hir_id))
+                    || is_receiver_of_method_call(cx, e)
+                    || is_as_argument(cx, e)
+                {
                     snip = snip.maybe_par();
                 }
 
@@ -442,3 +445,7 @@ fn fetch_assign<'tcx>(expr: &'tcx Expr<'tcx>) -> Option<(&'tcx Expr<'tcx>, bool)
         None
     }
 }
+
+fn is_as_argument(cx: &LateContext<'_>, e: &Expr<'_>) -> bool {
+    matches!(get_parent_expr(cx, e).map(|e| e.kind), Some(ExprKind::Cast(_, _)))
+}