Level Up your Rust pattern matching
a day ago
- #PatternMatching
- #Rust
- #Programming
- Rust's pattern matching basics include matching on enums, destructuring tuples, and handling Option and Result.
- Advanced techniques involve matching literals, variables, wildcards, and destructuring tuples and structs.
- Working with arrays and slices allows matching on structure, with array matches requiring exact elements and slice patterns adapting to any length.
- Advanced techniques include taking references instead of consuming values, using match guards for complex conditions, and binding the whole value with @.
- Patterns are allowed in irrefutable contexts (let bindings, function parameters) and refutable contexts (match, if let).
- Best practices include considering performance for hot paths, preferring match over if/else chains for enums, and destructuring multiple fields in one pattern.
- Using matches! for simple boolean checks is more concise than single-arm match.
- Key takeaways include mastering advanced destructuring, reference patterns, guards, @ bindings, and choosing the right pattern matching tool.