jcorpac Rust Zero-Cost Abstractions
"You don't pay for what you don't use." This skill covers building high-level interfaces that compile down to efficient machine code.
Core Pillars
- Traits: Define shared behavior. Prefer
impl Traitfor static dispatch (fast) overdyn Trait(dynamic dispatch) unless polymorphism is required at runtime. - Generics: Write code that works for many types using Trait Bounds to restrict functionality.
- Macros: Use declarative (
macro_rules!) or procedural macros to generate boilerplate-free code at compile time.
Advanced Patterns
- Newtype Pattern: Wrapping a type to add specific behavior or safety.
- State Machine Pattern: Using enums and ownership to enforce valid state transitions at compile time.
- PhantomData: Using types to mark data that isn't physically present.
Value
These abstractions allow for "Fearless Refactoring" because the compiler enforces your design constraints strictly.