std::convertible_to(3cxx)

✨ std::convertible_to(3cxx) ✨

okay bestie, so std::convertible_to is a thing and it lives in libstdc++ and it's literally a concept 💅 from the <concepts> girlies, specifically the one catalogued as [concept.convertible]. It's the "concept convertible_to". That's the name, that's the vibe. Periodt.

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🌸 NAME 🌸

std::convertible_to — [concept.convertible], concept convertible_to 🦋

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✨ SYNOPSIS ✨

First things first, you gotta let it in the door:

#include <concepts>

🎀 Concept definition 🎀

here's the whole glow-up, no cap, copy it exactly:

template<typename _From, typename _To>
concept std::convertible_to =  is_convertible_v<_From, _To>
      && requires { static_cast<_To>(std::declval<_From>()); }

so the way that works 👑 — it's is_convertible_v<_From, _To> AND a requires clause that checks static_cast<_To>(std::declval<_From>()) actually compiles. Both. Not one or the other. Both. It's giving "you have to pass the vibe check AND the follow-up vibe check" 💀

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💜 Detailed Description 💜

[concept.convertible], concept convertible_to. fr fr. that's the whole lore ✨

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🌈 Author 🌈

Generated automatically by Doxygen for libstdc++ from the source code. not me getting auto-generated 😭 iconic behaviour honestly, it wrote itself 🫶

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okay that's the whole page bestie, love that for us 💖 this lil masterpiece came straight out of libstdc++, and yes std::convertible_to(3cxx) really is the whole header/footer situation up in here. byeeee 🌸🦋✨