STD::_TUPLE_IMPL(3cxx)

🌸 NAME 🌸

Welcome to the STD::_TUPLE_IMPL(3CXX) page, bestie — manual section 3cxx, libstdc++ energy, and the star of the show is std::_Tuple_impl< _Idx, _Elements >. This is literally the behind-the-scenes implementation page for tuple, and it’s giving “backstage pass to the main character container,” no cap.

✨ SYNOPSIS ✨

template<size_t _Idx, typename... _Elements>
    struct std::_Tuple_impl< _Idx, _Elements >

Tiny note, iykyk: the raw page has a stray " right after that > before “Contains” — not me, bestie. The actual struct signature is the code above, periodt.

💖 Detailed Description 💖

Ok so picture a recursive inheritance hierarchy, and honestly that’s the whole vibe of tuple’s implementation. This struct contains the actual implementation of the tuple template, stored as a recursive inheritance hierarchy from the first element — the most derived class — all the way to the last element — the least derived class. The way that works is so iconic.

The _Idx parameter gives the 0-based index of the element stored at this point in the hierarchy. We use it to implement a constant-time get() operation. Lowkey genius, highkey slay.

Vibe check: _Idx is 0-based, and it’s the index of the element at this exact point in the recursive hierarchy. Constant-time get() is the payoff. Don’t lose that detail, fr fr.

🫶 Author 🫶

Generated automatically by Doxygen for libstdc++ from the source code. Not a human author with a little biography — just Doxygen doing its auto-generated thing, and honestly that’s its own kind of main character energy.

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Cute sign-off, bestie: source/version is libstdc++ auto-generated from source, and this page is stamped into the 3cxx manual section. Date check: the footer shown here didn’t include a date, so we’re not inventing one — periodt 💅✨