[clang][NFC] Convert Sema::FormatStringType to scoped enum

Author: Endilll

clang/include/clang/Sema/Sema.h

@@ -496,6 +496,20 @@ enum class TUFragmentKind {
   Private
 };
 
+enum class FormatStringType {
+  Scanf,
+  Printf,
+  NSString,
+  Strftime,
+  Strfmon,
+  Kprintf,
+  FreeBSDKPrintf,
+  OSTrace,
+  OSLog,
+  Syslog,
+  Unknown
+};
+
 /// Sema - This implements semantic analysis and AST building for C.
 /// \nosubgrouping
 class Sema final : public SemaBase {
@@ -2251,19 +2265,6 @@ class Sema final : public SemaBase {
                                SourceLocation BuiltinLoc,
                                SourceLocation RParenLoc);
 
-  enum FormatStringType {
-    FST_Scanf,
-    FST_Printf,
-    FST_NSString,
-    FST_Strftime,
-    FST_Strfmon,
-    FST_Kprintf,
-    FST_FreeBSDKPrintf,
-    FST_OSTrace,
-    FST_OSLog,
-    FST_Syslog,
-    FST_Unknown
-  };
   static StringRef GetFormatStringTypeName(FormatStringType FST);
   static FormatStringType GetFormatStringType(StringRef FormatFlavor);
   static FormatStringType GetFormatStringType(const FormatAttr *Format);