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Patterns for Defensive Programming in Rust

Patterns for Defensive Programming in Rust

2 comments

·December 5, 2025
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brohee

The very useful TryFrom trait landed only in 1.34, so hopefully the code using unwrap_or_else() in From impl predates that...

Actually the From trait documentation is now extremely clear about when to implement it (https://doc.rust-lang.org/std/convert/trait.From.html#when-t...)

empath75

This is one of the best Rust articles I've ever read. It's obviously from experience and covers a lot of _business logic_ foot guns that Rust doesn't typically protect you against without a little bit of careful coding that allows the compiler to help you.

So many rust articles are focused on people doing dark sorcery with "unsafe", and this is just normal every day api design, which is far more practical for most people.