[clang-tools-extra] [clang-doc] mangle specialization file names (PR #144617)

[Erick Velez via cfe-commits]

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@@ -909,6 +910,13 @@ emitInfo(const RecordDecl *D, const FullComment *FC, Location Loc,
       RI->Template.emplace();
     RI->Template->Specialization.emplace();
     auto &Specialization = *RI->Template->Specialization;
+    auto *Mangler = ItaniumMangleContext::create(
+        D->getASTContext(), D->getASTContext().getDiagnostics());
+    std::string MangledName;
+    llvm::raw_string_ostream Stream(MangledName);
+    Mangler->mangleCXXVTT(dyn_cast<CXXRecordDecl>(D), Stream);
+    Specialization.MangledName.emplace(MangledName);
+    delete Mangler;
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evelez7 wrote:

It'd be nice to keep this mangler somewhere so that it's not allocated/deleted constantly. If it was kept in the Clang-Doc Context, it'd have to be passed specifically to this emitInfo which would break the pattern we have.

https://github.com/llvm/llvm-project/pull/144617