Rust's For Loop Is Smarter Than You Think | Advanced Rust Part 12

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Watch the rest of this series:    • Advanced Rust  
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   • How to become a Rust Developer  

Rust's for loop looks simple — but under the hood, it's a masterclass in trait design. In this video, we break down how `for item in &vec` actually works, why `IntoIterator` is implemented on references, and what this teaches us about designing our own traits.

We'll also unpack the desugaring of for loops, explain why `Deref` isn't enough to make iteration work on references, and highlight a key insight: how trait method receivers (`self` vs `&self`) change everything about how implementations behave — and why that’s a feature, not a limitation.

Whether you're curious about auto-borrowing, reference-based trait impls, or just love seeing how elegant Rust’s internals are, this episode delivers.

⏱️ Perfect for intermediate-to-advanced Rust devs who want to sharpen their understanding of ownership, iteration, and trait design.

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#rustlang #advancedrust #rustprogramming #forloop #intorust #rusttraits #rustiterators #ownership #zerocostabstractions

Chapters:
00:00 Desugaring the for loop
02:15 Ownership vs Borrowing
03:12 Brilliant Sponsorship
04:33 IntoIterator
06:04 Vec's IntoIterator
08:31 Impl on &T
11:12 Outro

This video was sponsored by Brilliant