Use is_copy

Author: kraktus

clippy_lints/src/matches/manual_map.rs

@@ -2,9 +2,7 @@ use super::MANUAL_MAP;
 use crate::{map_unit_fn::OPTION_MAP_UNIT_FN, matches::MATCH_AS_REF};
 use clippy_utils::diagnostics::span_lint_and_sugg;
 use clippy_utils::source::{snippet_with_applicability, snippet_with_context};
-use clippy_utils::ty::{
-    implements_trait, is_type_diagnostic_item, peel_mid_ty_refs_is_mutable, type_is_unsafe_function,
-};
+use clippy_utils::ty::{is_copy, is_type_diagnostic_item, peel_mid_ty_refs_is_mutable, type_is_unsafe_function};
 use clippy_utils::{
     can_move_expr_to_closure, is_else_clause, is_lang_ctor, is_lint_allowed, path_to_local_id, peel_blocks,
     peel_hir_expr_refs, peel_hir_expr_while, sugg::Sugg, CaptureKind,
@@ -240,11 +238,7 @@ where
     };
 
     // relies on the fact that Option<T>: Copy where T: copy
-    let scrutinee_impl_copy = cx
-        .tcx
-        .lang_items()
-        .copy_trait()
-        .map_or(false, |id| implements_trait(cx, scrutinee_ty, id, &[]));
+    let scrutinee_impl_copy = is_copy(cx, scrutinee_ty);
 
     Some(SuggInfo {
         needs_brackets: else_pat.is_none() && is_else_clause(cx.tcx, expr),