[
    Expression {
        expr: Infix {
            lhs: Variable {
                name: "a",
            },
            op: Assign,
            rhs: LiteralInteger {
                i: 4,
            },
        },
    },
    Expression {
        expr: Infix {
            lhs: Variable {
                name: "b",
            },
            op: Assign,
            rhs: Match {
                condition: Variable {
                    name: "a",
                },
                default: Some(
                    DefaultMatchArm {
                        body: Null,
                    },
                ),
                arms: [
                    MatchArm {
                        conditions: [
                            LiteralInteger {
                                i: 1,
                            },
                            LiteralInteger {
                                i: 2,
                            },
                            LiteralInteger {
                                i: 3,
                            },
                            LiteralInteger {
                                i: 4,
                            },
                        ],
                        body: Null,
                    },
                ],
            },
        },
    },
]