[clang] fix typo correction not looking for candidates in base classes.

RecordMemberExprValidator was not looking through ElaboratedType
nodes when looking for candidates which occur in base classes.

Signed-off-by: Matheus Izvekov <[email protected]>

Reviewed By: rsmith

Differential Revision: https://reviews.llvm.org/D111830

Author: mizvekov

clang/lib/Sema/SemaExprMember.cpp

@@ -611,11 +611,10 @@ class RecordMemberExprValidatorCCC final : public CorrectionCandidateCallback {
     if (Record->containsDecl(ND))
       return true;
 
-    if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Record)) {
+    if (const auto *RD = dyn_cast<CXXRecordDecl>(Record)) {
       // Accept candidates that occur in any of the current class' base classes.
       for (const auto &BS : RD->bases()) {
-        if (const RecordType *BSTy =
-                dyn_cast_or_null<RecordType>(BS.getType().getTypePtrOrNull())) {
+        if (const auto *BSTy = BS.getType()->getAs<RecordType>()) {
           if (BSTy->getDecl()->containsDecl(ND))
             return true;
         }

clang/test/CXX/drs/dr1xx.cpp

@@ -477,15 +477,15 @@ namespace dr140 { // dr140: yes
 
 namespace dr141 { // dr141: yes
   template<typename T> void f();
-  template<typename T> struct S { int n; };
+  template<typename T> struct S { int n; }; // expected-note {{'::dr141::S<int>::n' declared here}}
   struct A : S<int> {
     template<typename T> void f();
     template<typename T> struct S {};
   } a;
   struct B : S<int> {} b;
   void g() {
     a.f<int>();
-    (void)a.S<int>::n; // expected-error {{no member named 'n'}}
+    (void)a.S<int>::n; // expected-error {{no member named 'n' in 'dr141::A::S<int>'; did you mean '::dr141::S<int>::n'?}}
 #if __cplusplus < 201103L
     // expected-error@-2 {{ambiguous}}
     // expected-note@-11 {{lookup from the current scope}}