PR35586: Relax two asserts that are overly restrictive

The two asserts are too aggressive.  In C++  mode, an
enum is NOT considered an integral type, but an enum value
is allowed to be an enum.  This patch relaxes the two asserts
to allow the enum value as well (as typechecking does).

llvm-svn: 320411

clang/lib/Sema/SemaDecl.cpp

@@ -15217,7 +15217,8 @@ void Sema::ActOnFields(Scope *S, SourceLocation RecLoc, Decl *EnclosingDecl,
 static bool isRepresentableIntegerValue(ASTContext &Context,
                                         llvm::APSInt &Value,
                                         QualType T) {
-  assert(T->isIntegralType(Context) && "Integral type required!");
+  assert((T->isIntegralType(Context) || T->isEnumeralType()) &&
+         "Integral type required!");
   unsigned BitWidth = Context.getIntWidth(T);
 
   if (Value.isUnsigned() || Value.isNonNegative()) {
@@ -15233,7 +15234,8 @@ static bool isRepresentableIntegerValue(ASTContext &Context,
 static QualType getNextLargerIntegralType(ASTContext &Context, QualType T) {
   // FIXME: Int128/UInt128 support, which also needs to be introduced into
   // enum checking below.
-  assert(T->isIntegralType(Context) && "Integral type required!");
+  assert((T->isIntegralType(Context) ||
+         T->isEnumeralType()) && "Integral type required!");
   const unsigned NumTypes = 4;
   QualType SignedIntegralTypes[NumTypes] = {
     Context.ShortTy, Context.IntTy, Context.LongTy, Context.LongLongTy

clang/test/SemaCXX/enum-scoped.cpp

@@ -309,3 +309,8 @@ namespace test11 {
 
   bool f() { return !f1(); } // expected-error {{invalid argument type 'test11::E2' (aka 'test11::E') to unary expression}}
 }
+
+namespace PR35586 {
+  enum C { R, G, B };
+  enum B { F = (enum C) -1, T}; // this should compile cleanly, it used to assert.
+};