Ignore macros + minor performance improvement

Author: blyxyas

clippy_lints/src/items_after_test_module.rs

@@ -3,7 +3,7 @@ use rustc_hir::{HirId, ItemId, ItemKind, Mod};
 use rustc_lint::{LateContext, LateLintPass, LintContext};
 use rustc_middle::lint::in_external_macro;
 use rustc_session::{declare_lint_pass, declare_tool_lint};
-use rustc_span::{sym, Span};
+use rustc_span::sym;
 
 declare_clippy_lint! {
     /// ### What it does
@@ -43,7 +43,7 @@ declare_lint_pass!(ItemsAfterTestModule => [ITEMS_AFTER_TEST_MODULE]);
 impl LateLintPass<'_> for ItemsAfterTestModule {
     fn check_mod(&mut self, cx: &LateContext<'_>, _: &Mod<'_>, _: HirId) {
         let mut was_test_mod_visited = false;
-        let mut test_mod_span: Option<Span> = None;
+        let mut test_mod_hash: Option<u128> = None;
 
         let hir = cx.tcx.hir();
         let items = hir.items().collect::<Vec<ItemId>>();
@@ -54,8 +54,8 @@ impl LateLintPass<'_> for ItemsAfterTestModule {
             if_chain! {
             if was_test_mod_visited;
             if cx.sess().source_map().lookup_char_pos(item.span.lo()).file.name_hash
-            == cx.sess().source_map().lookup_char_pos(test_mod_span.unwrap().lo()).file.name_hash;
-            if !matches!(item.kind, ItemKind::Mod(_));
+            == test_mod_hash.unwrap(); // Will never fail
+            if !matches!(item.kind, ItemKind::Mod(_) | ItemKind::Macro(_, _));
             if !is_in_cfg_test(cx.tcx, itid.hir_id()); // The item isn't in the testing module itself
 
             if !in_external_macro(cx.sess(), item.span);
@@ -66,15 +66,15 @@ impl LateLintPass<'_> for ItemsAfterTestModule {
             if matches!(item.kind, ItemKind::Mod(_)) {
                 for attr in cx.tcx.get_attrs(item.owner_id.to_def_id(), sym::cfg) {
                     if_chain! {
-                        if attr.has_name(sym::cfg);
-                        if let Some(mitems) = attr.meta_item_list();
-                        if let [mitem] = &*mitems;
-                        if mitem.has_name(sym::test);
-                        then {
-                            was_test_mod_visited = true;
-                            test_mod_span = Some(item.span);
-                        }
-                    }
+                                if attr.has_name(sym::cfg);
+                                if let Some(mitems) = attr.meta_item_list();
+                                if let [mitem] = &*mitems;
+                                if mitem.has_name(sym::test);
+                                then {
+                                    was_test_mod_visited = true;
+                    test_mod_hash = Some(cx.sess().source_map().lookup_char_pos(item.span.lo()).file.name_hash);
+                                }
+                            }
                 }
             }
         }

tests/ui/items_after_test_module.rs

@@ -18,3 +18,7 @@ mod tests {
 fn should_lint() {}
 
 const SHOULD_ALSO_LINT: usize = 1;
+
+macro_rules! should_not_lint {
+    () => {};
+}