rust / beginner
Snippet
Basic Enumerations
Enums allow you to define a type by enumerating its possible variants. Here Direction has four variants representing cardinal directions. The match expression checks which variant we have and handles each case accordingly.
snippet.rs
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enum Direction {North,South,East,West,}fn main() {let heading = Direction::North;match heading {Direction::North => println!("Heading north!"),Direction::South => println!("Heading south!"),Direction::East => println!("Heading east!"),Direction::West => println!("Heading west!"),}}
Breakdown
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enum Direction {
Begins enum definition with four variants
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North, South, East, West,
Each variant is a distinct value of Direction type
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let heading = Direction::North;
Creates instance using :: syntax to specify variant
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match heading { ... }
Match expression handles each enum variant