Rust
Copy Versus Clone in Rust and Which Types Are Copy
Copy is an implicit bitwise duplicate and Clone is an explicit call that can do real work. Know which of your types should have which, and what each costs.
7 min read
Library
Everything you need to level up your coding skills.
Generics
Static Versus Dynamic Dispatch in Rust and the Real Cost
Static dispatch resolves the call at compile time and dynamic dispatch looks it up in a vtable at run time. See the layout, the cost and when it matters.
8 min read
Systems
Embedded HAL Traits in Rust and Writing Portable Drivers
embedded-hal defines traits for pins, buses and delays so one sensor driver runs on any chip. Write a driver generic over I2C and see how to test it with a mock.
2 min read
Generics
Generics in Rust and How Monomorphization Makes Them Fast
Generic Rust code is compiled once per concrete type, which is why it is as fast as hand written code and why binaries grow. See what that looks like.
6 min read
Generics
Rust Error E0119 Conflicting Implementations of Trait
E0119 means two impl blocks could apply to the same type. See the common triggers, such as blanket impls and derive plus manual impl, and how to resolve them.
6 min read
Generics
Rust Error E0117 Only Traits Defined Here Can Be Implemented
E0117 means you tried to implement a foreign trait for a foreign type. See the exact message, three causes and the newtype or local trait fix.
6 min read
Generics
The Orphan Rule in Rust and How to Work Around It Explained
The orphan rule says you can implement a trait only if the trait or the type is yours. See why it exists, the usual errors and the standard workarounds.
7 min read
Generics
Blanket Implementations in Rust and Their Coherence Limits
A blanket implementation implements a trait for every type that meets a bound. See how ToString and Into work, the coherence rules that limit you and a safe pattern.
6 min read
Architecture
Hexagonal Architecture in Rust With Traits as Ports
Put the business rules in the middle, describe what they need as traits (ports) and plug in databases and HTTP as adapters. A complete small example with a test double.
3 min read
Generics
Supertraits in Rust and Building Trait Hierarchies Safely
A supertrait says a trait requires another one. See the syntax, how methods are inherited, trait objects with supertraits and upcasting.
6 min read
Generics
Box dyn Trait in Rust and When Allocation Is Worth It
Box<dyn Trait> costs one allocation and one indirect call per use. Learn what that costs, when it is worth it and the cheaper alternatives.
8 min read
Generics
Dyn Compatibility in Rust and the Rules That Block dyn
Dyn compatibility is the set of rules a trait must meet to be used as dyn Trait. Learn each rule, the error it produces and how to keep a trait usable.
7 min read
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