[all-commits] [llvm/llvm-project] e400c6: Revert "[clang] Build UsingType for elaborated typ...

[Haojian Wu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e400c63cc39680538a3726a7736baf6b7844c3a8
      https://github.com/llvm/llvm-project/commit/e400c63cc39680538a3726a7736baf6b7844c3a8
  Author: Haojian Wu <hokein.wu at gmail.com>
  Date:   2023-01-26 (Thu, 26 Jan 2023)

  Changed paths:
    M clang-tools-extra/clangd/unittests/SelectionTests.cpp
    M clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
    M clang/include/clang/Sema/DeclSpec.h
    M clang/include/clang/Sema/Sema.h
    M clang/lib/Parse/ParseDecl.cpp
    M clang/lib/Parse/ParseDeclCXX.cpp
    M clang/lib/Sema/SemaDecl.cpp
    M clang/lib/Sema/SemaDeclCXX.cpp
    M clang/lib/Sema/SemaTemplate.cpp
    M clang/lib/Sema/SemaType.cpp
    M clang/test/CXX/drs/dr2xx.cpp
    M clang/test/CXX/drs/dr4xx.cpp

  Log Message:
  -----------
  Revert "[clang] Build UsingType for elaborated type specifiers."

This reverts commit e70ca7b35319a3621f9d9c6475926428f8c5c000 and the
followup patch "[clang] Fix the location of UsingTypeLoc"
(ebbeb164c25a40cb6ba9c6b18dce5dcd06c0bb07).

The patch causes an incorrect lookup result:

```
namespace ns { struct Foo { };}

using ns::Foo;
void test() {
  struct Foo {
  } k; // the type of k refers to ns::Foo, rather than the local Foo!
}
```