From 5a13a93d41b34b869e3813c1dff4d8b81ed4b777 Mon Sep 17 00:00:00 2001
From: GnomedDev <david2005thomas@gmail.com>
Date: Wed, 18 Sep 2024 17:58:18 +0100
Subject: [PATCH] [Clippy] Swap `map_entry` to use diagnostic items instead of
 paths

---
 clippy_lints/src/entry.rs | 12 ++++++------
 clippy_utils/src/paths.rs |  4 ----
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/clippy_lints/src/entry.rs b/clippy_lints/src/entry.rs
index b7c9d3d0385..9c5100a8c1a 100644
--- a/clippy_lints/src/entry.rs
+++ b/clippy_lints/src/entry.rs
@@ -1,8 +1,8 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
 use clippy_utils::source::{reindent_multiline, snippet_indent, snippet_with_applicability, snippet_with_context};
 use clippy_utils::{
-    can_move_expr_to_closure_no_visit, higher, is_expr_final_block_expr, is_expr_used_or_unified, match_def_path,
-    paths, peel_hir_expr_while, SpanlessEq,
+    can_move_expr_to_closure_no_visit, higher, is_expr_final_block_expr, is_expr_used_or_unified,
+    peel_hir_expr_while, SpanlessEq,
 };
 use core::fmt::{self, Write};
 use rustc_errors::Applicability;
@@ -11,7 +11,7 @@
 use rustc_hir::{Block, Expr, ExprKind, HirId, Pat, Stmt, StmtKind, UnOp};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::declare_lint_pass;
-use rustc_span::{Span, SyntaxContext, DUMMY_SP};
+use rustc_span::{sym, Span, SyntaxContext, DUMMY_SP};
 
 declare_clippy_lint! {
     /// ### What it does
@@ -269,9 +269,9 @@ fn try_parse_contains<'tcx>(cx: &LateContext<'_>, expr: &'tcx Expr<'_>) -> Optio
                 key,
                 call_ctxt: expr.span.ctxt(),
             };
-            if match_def_path(cx, id, &paths::BTREEMAP_CONTAINS_KEY) {
+            if cx.tcx.is_diagnostic_item(sym::btreemap_contains_key, id) {
                 Some((MapType::BTree, expr))
-            } else if match_def_path(cx, id, &paths::HASHMAP_CONTAINS_KEY) {
+            } else if cx.tcx.is_diagnostic_item(sym::hashmap_contains_key, id) {
                 Some((MapType::Hash, expr))
             } else {
                 None
@@ -306,7 +306,7 @@ struct InsertExpr<'tcx> {
 fn try_parse_insert<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx Expr<'_>) -> Option<InsertExpr<'tcx>> {
     if let ExprKind::MethodCall(_, map, [key, value], _) = expr.kind {
         let id = cx.typeck_results().type_dependent_def_id(expr.hir_id)?;
-        if match_def_path(cx, id, &paths::BTREEMAP_INSERT) || match_def_path(cx, id, &paths::HASHMAP_INSERT) {
+        if cx.tcx.is_diagnostic_item(sym::btreemap_insert, id) || cx.tcx.is_diagnostic_item(sym::hashmap_insert, id) {
             Some(InsertExpr { map, key, value })
         } else {
             None
diff --git a/clippy_utils/src/paths.rs b/clippy_utils/src/paths.rs
index fd28ca12d50..59105383093 100644
--- a/clippy_utils/src/paths.rs
+++ b/clippy_utils/src/paths.rs
@@ -12,8 +12,6 @@
     ["rustc_lint_defs", "Applicability", "MachineApplicable"],
 ];
 pub const DIAG: [&str; 2] = ["rustc_errors", "Diag"];
-pub const BTREEMAP_CONTAINS_KEY: [&str; 6] = ["alloc", "collections", "btree", "map", "BTreeMap", "contains_key"];
-pub const BTREEMAP_INSERT: [&str; 6] = ["alloc", "collections", "btree", "map", "BTreeMap", "insert"];
 pub const CORE_RESULT_OK_METHOD: [&str; 4] = ["core", "result", "Result", "ok"];
 pub const CSTRING_AS_C_STR: [&str; 5] = ["alloc", "ffi", "c_str", "CString", "as_c_str"];
 pub const EARLY_CONTEXT: [&str; 2] = ["rustc_lint", "EarlyContext"];
@@ -25,8 +23,6 @@
 pub const FUTURES_IO_ASYNCREADEXT: [&str; 3] = ["futures_util", "io", "AsyncReadExt"];
 #[expect(clippy::invalid_paths)] // internal lints do not know about all external crates
 pub const FUTURES_IO_ASYNCWRITEEXT: [&str; 3] = ["futures_util", "io", "AsyncWriteExt"];
-pub const HASHMAP_CONTAINS_KEY: [&str; 6] = ["std", "collections", "hash", "map", "HashMap", "contains_key"];
-pub const HASHMAP_INSERT: [&str; 6] = ["std", "collections", "hash", "map", "HashMap", "insert"];
 pub const HASHMAP_ITER: [&str; 5] = ["std", "collections", "hash", "map", "Iter"];
 pub const HASHMAP_ITER_MUT: [&str; 5] = ["std", "collections", "hash", "map", "IterMut"];
 pub const HASHMAP_KEYS: [&str; 5] = ["std", "collections", "hash", "map", "Keys"];