1 files changed, 32 insertions, 4 deletions
diff --git a/include/clang/Basic/Specifiers.h b/include/clang/Basic/Specifiers.h
index 0af01e45437d..d1236e798e5d 100644
--- a/include/clang/Basic/Specifiers.h
+++ b/include/clang/Basic/Specifiers.h
@@ -1,9 +1,8 @@
 //===--- Specifiers.h - Declaration and Type Specifiers ---------*- C++ -*-===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 ///
@@ -21,6 +20,21 @@
 #include "llvm/Support/ErrorHandling.h"
 
 namespace clang {
+
+  /// Define the meaning of possible values of the kind in ExplicitSpecifier.
+  enum class ExplicitSpecKind : unsigned {
+    ResolvedFalse,
+    ResolvedTrue,
+    Unresolved,
+  };
+
+  /// Define the kind of constexpr specifier.
+  enum ConstexprSpecKind {
+    CSK_unspecified,
+    CSK_constexpr,
+    CSK_consteval
+  };
+
   /// Specifies the width of a type, e.g., short, long, or long long.
   enum TypeSpecifierWidth {
     TSW_unspecified,
@@ -141,6 +155,20 @@ namespace clang {
     OK_ObjCSubscript
   };
 
+  /// The reason why a DeclRefExpr does not constitute an odr-use.
+  enum NonOdrUseReason {
+    /// This is an odr-use.
+    NOUR_None = 0,
+    /// This name appears in an unevaluated operand.
+    NOUR_Unevaluated,
+    /// This name appears as a potential result of an lvalue-to-rvalue
+    /// conversion that is a constant expression.
+    NOUR_Constant,
+    /// This name appears as a potential result of a discarded value
+    /// expression.
+    NOUR_Discarded,
+  };
+
   /// Describes the kind of template specialization that a
   /// particular template specialization declaration represents.
   enum TemplateSpecializationKind {