[libclang] Visit function template instantiations #67928
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This PR changes
CursorVisitor::VisitFunctionTemplateDeclsuch that instantiations of the function template (e.g.template void foo<int>();) are visited as children of theFunctionTemplateDecl. This also applies to class methods.The use case for this I have in mind would be to add limited support for function templates in
rust-bindgen(see rust-lang/rust-bindgen#2650).Additionally, I have taken the liberty to add
CXCursor_CXXMethodto the list of cursors supported bygetTemplateArgument, since I found it a bit odd that this was not the case before.Please let me know if there is anything that needs to be changed, I'm happy to make changes if necessary.