[clang] [Clang] omit parentheses in fold expressions with a single expansion (PR #110761)

[Oleksandr T. via cfe-commits]

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@@ -15598,6 +15598,9 @@ TreeTransform<Derived>::TransformCXXFoldExpr(CXXFoldExpr *E) {
     return getDerived().RebuildEmptyCXXFoldExpr(E->getEllipsisLoc(),
                                                 E->getOperator());
 
+  if (*NumExpansions == 1)
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a-tarasyuk wrote:

@erichkeane thanks for the detailed feedback! I’ve added more tests and adjusted the ignore parentheses to apply to the pattern. Are there any other cases that should be covered?

https://github.com/llvm/llvm-project/pull/110761