Vendor import of clang trunk r240225:

https://llvm.org/svn/llvm-project/cfe/trunk@240225

1 files changed, 19 insertions, 0 deletions

diff --git a/include/clang/Basic/Specifiers.h b/include/clang/Basic/Specifiers.h
index 7569c16..5ce56c0 100644
--- a/include/clang/Basic/Specifiers.h
+++ b/include/clang/Basic/Specifiers.h
@@ -16,6 +16,9 @@
 #ifndef LLVM_CLANG_BASIC_SPECIFIERS_H
 #define LLVM_CLANG_BASIC_SPECIFIERS_H
 
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/DataTypes.h"
+
 namespace clang {
   /// \brief Specifies the width of a type, e.g., short, long, or long long.
   enum TypeSpecifierWidth {
@@ -239,6 +242,22 @@ namespace clang {
     SD_Static,         ///< Static storage duration.
     SD_Dynamic         ///< Dynamic storage duration.
   };
+
+  /// Describes the nullability of a particular type.
+  enum class NullabilityKind : uint8_t {
+    /// Values of this type can never be null.
+    NonNull = 0,
+    /// Values of this type can be null.
+    Nullable,
+    /// Whether values of this type can be null is (explicitly)
+    /// unspecified. This captures a (fairly rare) case where we
+    /// can't conclude anything about the nullability of the type even
+    /// though it has been considered.
+    Unspecified
+  };
+
+  /// Retrieve the spelling of the given nullability kind.
+  llvm::StringRef getNullabilitySpelling(NullabilityKind kind);
 } // end namespace clang
 
 #endif // LLVM_CLANG_BASIC_SPECIFIERS_H