[clang] [Clang] Add diagnostic when scoped enumeration requires an explicit conversion for binary operations (PR #152698)

[Erich Keane via cfe-commits]

================
@@ -10742,9 +10742,53 @@ static void DiagnoseBadDivideOrRemainderValues(Sema& 
S, ExprResult &LHS,
                             << IsDiv << RHS.get()->getSourceRange());
 }
 
+static void diagnoseScopedEnums(Sema &S, const SourceLocation Loc,
+                                const ExprResult &LHS, const ExprResult &RHS,
+                                BinaryOperatorKind Opc) {
+  const Expr *LHSExpr = LHS.get();
+  const Expr *RHSExpr = RHS.get();
+  if (!LHSExpr || !RHSExpr)
+    return;
+  const QualType LHSType = LHSExpr->getType();
+  const QualType RHSType = RHSExpr->getType();
+  const bool LHSIsScoped = LHSType->isScopedEnumeralType();
+  const bool RHSIsScoped = RHSType->isScopedEnumeralType();
+  if (!LHSIsScoped && !RHSIsScoped)
+    return;
+  if (!LHSIsScoped && !LHSType->isIntegralOrUnscopedEnumerationType())
+    return;
+  if (!RHSIsScoped && !RHSType->isIntegralOrUnscopedEnumerationType())
+    return;
+  if (BinaryOperator::isAssignmentOp(Opc) && LHSIsScoped)
----------------
erichkeane wrote:

Can we move this before the is integral/unscoped enum cases?  This ends up 
being a faster path.

https://github.com/llvm/llvm-project/pull/152698
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits