viable/strict/1788645006: Fold BoxedSize instead of recursing (#196086)

发生了什么

::value == 0); static_assert(BoxedSize ::value == 6); Verified standalone against GCC 16 (both compile-time and runtime), matching the recursive version's values. KernelFunction.cpp, which instantiates boxed_size through the boxing layer, recompiled clean from its own compile_commands.json command."> BoxedSize summed boxed_size_one over a parameter pack via a base case and a recursive partial specialization, with a…

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