1 files changed, 48 insertions, 38 deletions

diff --git a/include/clang/Sema/DeclSpec.h b/include/clang/Sema/DeclSpec.h
index 8d6f0bc9148b..b417f89c0e5b 100644
--- a/include/clang/Sema/DeclSpec.h
+++ b/include/clang/Sema/DeclSpec.h
@@ -1,9 +1,8 @@
 //===--- DeclSpec.h - Parsed declaration 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
 //
 //===----------------------------------------------------------------------===//
 ///
@@ -23,6 +22,7 @@
 #ifndef LLVM_CLANG_SEMA_DECLSPEC_H
 #define LLVM_CLANG_SEMA_DECLSPEC_H
 
+#include "clang/AST/DeclCXX.h"
 #include "clang/AST/NestedNameSpecifier.h"
 #include "clang/Basic/ExceptionSpecificationType.h"
 #include "clang/Basic/Lambda.h"
@@ -357,14 +357,13 @@ private:
   unsigned FS_inline_specified : 1;
   unsigned FS_forceinline_specified: 1;
   unsigned FS_virtual_specified : 1;
-  unsigned FS_explicit_specified : 1;
   unsigned FS_noreturn_specified : 1;
 
   // friend-specifier
   unsigned Friend_specified : 1;
 
   // constexpr-specifier
-  unsigned Constexpr_specified : 1;
+  unsigned ConstexprSpecifier : 2;
 
   union {
     UnionParsedType TypeRep;
@@ -372,6 +371,9 @@ private:
     Expr *ExprRep;
   };
 
+  /// ExplicitSpecifier - Store information about explicit spicifer.
+  ExplicitSpecifier FS_explicit_specifier;
+
   // attributes.
   ParsedAttributes Attrs;
 
@@ -394,6 +396,7 @@ private:
   SourceLocation TQ_constLoc, TQ_restrictLoc, TQ_volatileLoc, TQ_atomicLoc,
       TQ_unalignedLoc;
   SourceLocation FS_inlineLoc, FS_virtualLoc, FS_explicitLoc, FS_noreturnLoc;
+  SourceLocation FS_explicitCloseParenLoc;
   SourceLocation FS_forceinlineLoc;
   SourceLocation FriendLoc, ModulePrivateLoc, ConstexprLoc;
   SourceLocation TQ_pipeLoc;
@@ -421,31 +424,18 @@ public:
   }
 
   DeclSpec(AttributeFactory &attrFactory)
-    : StorageClassSpec(SCS_unspecified),
-      ThreadStorageClassSpec(TSCS_unspecified),
-      SCS_extern_in_linkage_spec(false),
-      TypeSpecWidth(TSW_unspecified),
-      TypeSpecComplex(TSC_unspecified),
-      TypeSpecSign(TSS_unspecified),
-      TypeSpecType(TST_unspecified),
-      TypeAltiVecVector(false),
-      TypeAltiVecPixel(false),
-      TypeAltiVecBool(false),
-      TypeSpecOwned(false),
-      TypeSpecPipe(false),
-      TypeSpecSat(false),
-      TypeQualifiers(TQ_unspecified),
-      FS_inline_specified(false),
-      FS_forceinline_specified(false),
-      FS_virtual_specified(false),
-      FS_explicit_specified(false),
-      FS_noreturn_specified(false),
-      Friend_specified(false),
-      Constexpr_specified(false),
-      Attrs(attrFactory),
-      writtenBS(),
-      ObjCQualifiers(nullptr) {
-  }
+      : StorageClassSpec(SCS_unspecified),
+        ThreadStorageClassSpec(TSCS_unspecified),
+        SCS_extern_in_linkage_spec(false), TypeSpecWidth(TSW_unspecified),
+        TypeSpecComplex(TSC_unspecified), TypeSpecSign(TSS_unspecified),
+        TypeSpecType(TST_unspecified), TypeAltiVecVector(false),
+        TypeAltiVecPixel(false), TypeAltiVecBool(false), TypeSpecOwned(false),
+        TypeSpecPipe(false), TypeSpecSat(false), TypeQualifiers(TQ_unspecified),
+        FS_inline_specified(false), FS_forceinline_specified(false),
+        FS_virtual_specified(false), FS_noreturn_specified(false),
+        Friend_specified(false), ConstexprSpecifier(CSK_unspecified),
+        FS_explicit_specifier(), Attrs(attrFactory), writtenBS(),
+        ObjCQualifiers(nullptr) {}
 
   // storage-class-specifier
   SCS getStorageClassSpec() const { return (SCS)StorageClassSpec; }
@@ -540,6 +530,7 @@ public:
   static const char *getSpecifierName(DeclSpec::TSW W);
   static const char *getSpecifierName(DeclSpec::SCS S);
   static const char *getSpecifierName(DeclSpec::TSCS S);
+  static const char *getSpecifierName(ConstexprSpecKind C);
 
   // type-qualifiers
 
@@ -571,11 +562,22 @@ public:
     return FS_inline_specified ? FS_inlineLoc : FS_forceinlineLoc;
   }
 
+  ExplicitSpecifier getExplicitSpecifier() const {
+    return FS_explicit_specifier;
+  }
+
   bool isVirtualSpecified() const { return FS_virtual_specified; }
   SourceLocation getVirtualSpecLoc() const { return FS_virtualLoc; }
 
-  bool isExplicitSpecified() const { return FS_explicit_specified; }
+  bool hasExplicitSpecifier() const {
+    return FS_explicit_specifier.isSpecified();
+  }
   SourceLocation getExplicitSpecLoc() const { return FS_explicitLoc; }
+  SourceRange getExplicitSpecRange() const {
+    return FS_explicit_specifier.getExpr()
+               ? SourceRange(FS_explicitLoc, FS_explicitCloseParenLoc)
+               : SourceRange(FS_explicitLoc);
+  }
 
   bool isNoreturnSpecified() const { return FS_noreturn_specified; }
   SourceLocation getNoreturnSpecLoc() const { return FS_noreturnLoc; }
@@ -587,8 +589,9 @@ public:
     FS_forceinlineLoc = SourceLocation();
     FS_virtual_specified = false;
     FS_virtualLoc = SourceLocation();
-    FS_explicit_specified = false;
+    FS_explicit_specifier = ExplicitSpecifier();
     FS_explicitLoc = SourceLocation();
+    FS_explicitCloseParenLoc = SourceLocation();
     FS_noreturn_specified = false;
     FS_noreturnLoc = SourceLocation();
   }
@@ -707,7 +710,8 @@ public:
   bool setFunctionSpecVirtual(SourceLocation Loc, const char *&PrevSpec,
                               unsigned &DiagID);
   bool setFunctionSpecExplicit(SourceLocation Loc, const char *&PrevSpec,
-                               unsigned &DiagID);
+                               unsigned &DiagID, ExplicitSpecifier ExplicitSpec,
+                               SourceLocation CloseParenLoc);
   bool setFunctionSpecNoreturn(SourceLocation Loc, const char *&PrevSpec,
                                unsigned &DiagID);
 
@@ -715,8 +719,8 @@ public:
                      unsigned &DiagID);
   bool setModulePrivateSpec(SourceLocation Loc, const char *&PrevSpec,
                             unsigned &DiagID);
-  bool SetConstexprSpec(SourceLocation Loc, const char *&PrevSpec,
-                        unsigned &DiagID);
+  bool SetConstexprSpec(ConstexprSpecKind ConstexprKind, SourceLocation Loc,
+                        const char *&PrevSpec, unsigned &DiagID);
 
   bool isFriendSpecified() const { return Friend_specified; }
   SourceLocation getFriendSpecLoc() const { return FriendLoc; }
@@ -724,11 +728,17 @@ public:
   bool isModulePrivateSpecified() const { return ModulePrivateLoc.isValid(); }
   SourceLocation getModulePrivateSpecLoc() const { return ModulePrivateLoc; }
 
-  bool isConstexprSpecified() const { return Constexpr_specified; }
+  ConstexprSpecKind getConstexprSpecifier() const {
+    return ConstexprSpecKind(ConstexprSpecifier);
+  }
+
   SourceLocation getConstexprSpecLoc() const { return ConstexprLoc; }
+  bool hasConstexprSpecifier() const {
+    return ConstexprSpecifier != CSK_unspecified;
+  }
 
   void ClearConstexprSpec() {
-    Constexpr_specified = false;
+    ConstexprSpecifier = CSK_unspecified;
     ConstexprLoc = SourceLocation();
   }