::std::initializer_list vs variadic templates

Question

Does passing multiple arguments via ::std::initializer_list offer any advantages over the variadic function template method?

In code:

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Answer 1

On occasions I had used variadic template functions just like yours, but then realized that I needed more parameters, possibly templated. In that case typename... A is too eager, and I was happy to rely on braces on the call site to clearly specify where the variadic list of arguments ends, and where the following optional arguments started.