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Introduction C++20 shipped with Concepts — a long‑awaited way to express constraints on template parameters right where they live. Concepts turn the old “SFINAE and traits soup” into clear, readable predicates that the compiler can check for you. If you’ve ever stared at a 20‑line enable_if just to say “this needs to be integral,” this feature is for you. ...

If you’ve ever stared at a blank folder wondering where do I even start?, you’re not alone. I’ve been there—more than once. ...

A short note on pointer arithmetic and array decay in C…