Reland "[clang-format] Update FormatToken::isSimpleTypeSpecifier() (#80241)"

Author: owenca

clang/lib/Format/FormatToken.cpp

@@ -14,9 +14,7 @@
 
 #include "FormatToken.h"
 #include "ContinuationIndenter.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/Support/Debug.h"
-#include <climits>
+#include "TokenAnalyzer.h"
 
 namespace clang {
 namespace format {
@@ -34,41 +32,9 @@ const char *getTokenTypeName(TokenType Type) {
   return nullptr;
 }
 
-// FIXME: This is copy&pasted from Sema. Put it in a common place and remove
-// duplication.
 bool FormatToken::isSimpleTypeSpecifier() const {
-  switch (Tok.getKind()) {
-  case tok::kw_short:
-  case tok::kw_long:
-  case tok::kw___int64:
-  case tok::kw___int128:
-  case tok::kw_signed:
-  case tok::kw_unsigned:
-  case tok::kw_void:
-  case tok::kw_char:
-  case tok::kw_int:
-  case tok::kw_half:
-  case tok::kw_float:
-  case tok::kw_double:
-  case tok::kw___bf16:
-  case tok::kw__Float16:
-  case tok::kw___float128:
-  case tok::kw___ibm128:
-  case tok::kw_wchar_t:
-  case tok::kw_bool:
-#define TRANSFORM_TYPE_TRAIT_DEF(_, Trait) case tok::kw___##Trait:
-#include "clang/Basic/TransformTypeTraits.def"
-  case tok::annot_typename:
-  case tok::kw_char8_t:
-  case tok::kw_char16_t:
-  case tok::kw_char32_t:
-  case tok::kw_typeof:
-  case tok::kw_decltype:
-  case tok::kw__Atomic:
-    return true;
-  default:
-    return false;
-  }
+  assert(LangOpts.CPlusPlus);
+  return Tok.isSimpleTypeSpecifier(LangOpts);
 }
 
 bool FormatToken::isTypeOrIdentifier() const {