[libcxxabi] [llvm] [ItaniumDemangle] Add customizable printLeft/printRight APIs to OutputBuffer (PR #133249)

[Michael Buch via llvm-commits]

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@@ -121,6 +137,8 @@ class OutputBuffer {
   OutputBuffer &prepend(std::string_view R) {
     size_t Size = R.size();
 
+    notifyInsertion(/*Position=*/0, /*Count=*/Size);
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Michael137 wrote:

done

https://github.com/llvm/llvm-project/pull/133249