← Sui Move theorytheory 0/25 · 0%

level 1

Curious · 0 XP

streak

perfect

badges

100 XP to Apprentice

Move 2024 · medium

9. Move 2024: Enums and Pattern Matching

Sum types and exhaustive match branching.

1 min read2 questionsup to 50 XPtopic 9/25

Read in another language

AI translates the explanation and quiz text while preserving code and answer scoring.

Move 2024 introduces native `enum` definitions and `match` expressions, allowing rich polymorphic data structures without untyped byte serialization.

move
public enum Action has drop {
    Stop,
    Move { x: u64, y: u64 },
    Teleport(address),
}

public fun execute(a: Action) {
    match (a) {
        Action::Stop => (),
        Action::Move { x, y } => update_pos(x, y),
        Action::Teleport(dest) => warp(dest),
    }
}

How to study this topic

1. Read the explanation once end to end, skipping the code.
2. Re-read the code snippets and say out loud what each line does.
3. Answer the quiz without scrolling back — that is the real check.
4. Read every explanation, even for the answers you got right.

Scoring

· Up to 30 XP from quiz accuracy.
· +15 XP for a perfect first attempt.
· +5 XP while a 3-day streak is running.
· 75% or higher marks the topic complete.

Check your understanding

1. What language construct in Move 2024 provides tagged sum types?
enumunioninterfacetrait
2. What does the Move compiler enforce on match expressions?
Exhaustiveness across all enum variantsMust contain at least 10 armsRequires a default arm alwaysAsync execution

Badges

First light

Pass your first topic

Sharp shooter

3 perfect first-try quizzes

On a roll

Study 3 days in a row

Week warrior

Study 7 days in a row

Grinder

Earn 500 XP

Deep diver

Earn 1500 XP