[clangd] Support operators new and delete in textDocument/references (#135620)

Author: ckandeler

clang-tools-extra/clangd/unittests/XRefsTests.cpp

@@ -2303,7 +2303,15 @@ TEST(FindReferences, WithinAST) {
         bool $decl[[operator]]"" _u^dl(unsigned long long value);
         bool x = $(x)[[1_udl]];
       )cpp",
-  };
+      R"cpp(
+        struct S {
+        public:
+          static void $decl(S)[[operator]] delete(void *);
+          static void deleteObject(S *S) {
+            $(S::deleteObject)[[de^lete]] S;
+          }
+        };
+      )cpp"};
   for (const char *Test : Tests)
     checkFindRefs(Test);
 }

clang/lib/Index/IndexBody.cpp

@@ -153,6 +153,20 @@ class BodyIndexer : public RecursiveASTVisitor<BodyIndexer> {
                                     ParentDC);
   }
 
+  bool VisitCXXNewExpr(CXXNewExpr *E) {
+    if (E->isGlobalNew() || !E->getOperatorNew())
+      return true;
+    return IndexCtx.handleReference(E->getOperatorNew(), E->getBeginLoc(),
+                                    Parent, ParentDC);
+  }
+
+  bool VisitCXXDeleteExpr(CXXDeleteExpr *E) {
+    if (E->isGlobalDelete() || !E->getOperatorDelete())
+      return true;
+    return IndexCtx.handleReference(E->getOperatorDelete(), E->getBeginLoc(),
+                                    Parent, ParentDC);
+  }
+
   bool VisitLabelStmt(LabelStmt *S) {
     if (IndexCtx.shouldIndexFunctionLocalSymbols())
       return IndexCtx.handleDecl(S->getDecl());