Rust — Memory-Safe Systems Programming Language

What Rust Does

• Ownership system — each value has a single owner, borrowed references checked at compile time
• Zero-cost abstractions — high-level code compiles to optimal low-level output
• No null, no exceptions — Option and Result types for absent/error values
• Pattern matching — exhaustive match expressions
• Trait system — structural polymorphism
• Fearless concurrency — data races prevented by borrow checker
• Cargo — package manager and build tool built in
• WebAssembly — first-class compilation target
• Async/await — since Rust 1.39

Architecture

Compiler (rustc) built on LLVM backend. Uses MIR (Mid-level Intermediate Representation) for borrow checking, then LLVM IR for optimization. Cargo manages dependencies from crates.io, the community package registry. Language evolves through an RFC process.

Self-Hosting

Language toolchain.

Key Features

• Memory safety without GC
• Zero-cost abstractions
• Ownership + borrowing
• Pattern matching
• Trait-based generics
• Cargo build system
• crates.io package registry
• Async/await support
• WebAssembly target
• Excellent tooling (clippy, rustfmt, rust-analyzer)

Comparison

FAQ

Q: How steep is the learning curve? A: The first week or two you will wrestle with the borrow checker (learning ownership and lifetimes). Once comfortable, productivity is very high. The Rust compiler's error messages are among the best in the industry.

Q: When to choose Rust? A: Systems programming, performance-sensitive CLI tools (ripgrep, bat, fd), WebAssembly, blockchain, embedded, game engines, and database engines.

Q: Compile speed is slow? A: It's one of Rust's pain points. Mitigations: incremental compilation, cargo check (fast type check), sccache, and splitting into a workspace. v1.x is continuously optimizing.

Sources

• Docs: https://www.rust-lang.org/learn
• GitHub: https://github.com/rust-lang/rust
• License: Apache 2.0 + MIT