rust-language

Ownership in Rust is a set of rules governing memory management without a garbage collector. Values have a single owner; borrowing lets you lend references temporarily. This prevents data races and memory errors at compile time, ensuring safe, efficient code execution.

Rust's Result and Option types encode success or failure explicitly. Result wraps a value or error; Option wraps a value or None. Pattern matching on these types forces you to handle all cases, eliminating silent failures and null pointer exceptions common in other languages.

Async/await syntax lets you write concurrent code that appears synchronous. Rust's ownership model prevents data races: the compiler ensures shared state across async tasks is thread-safe, enabling high-performance concurrent applications without manual synchronization.

Lifetimes annotate how long references remain valid, preventing dangling pointers. The compiler infers most lifetimes automatically, but explicit annotations clarify relationships between borrowed references in function signatures and structs, ensuring borrowed data outlives its use.

Cargo is Rust's package manager and build system. Define dependencies in Cargo.toml, organize code into modules and packages, and use cargo build, test, and doc commands. This standardized workflow ensures reproducible builds and idiomatic project layouts across teams.

Traits define shared behavior; generics let functions and types work with multiple concrete types. Together they enable abstraction and code reuse while maintaining Rust's performance: monomorphization compiles each generic instantiation separately, preserving zero-cost abstractions.