MoonBit

MoonBit(ムーンビット)

code:memo

json

// Define a recursive enum for expressions

enum Expr { Num(Int); Mul(Expr, Expr) }

// Evaluate expression with pattern matching

fn eval(expr : Expr) -> Int {

match expr {

Num(n) => n

Mul(a, b) => eval(a) * eval(b)

}

}

fn main {

let expr = Mul(Mul(Num(2), Num(3)), Num(4))

println(eval(expr)) // 24

}

確認用

Q. MoonBit

調査用

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