[
    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",
                },
                arms: [
                    MatchArm {
                        conditions: Some(
                            [
                                LiteralInteger {
                                    i: 1,
                                },
                                LiteralInteger {
                                    i: 2,
                                },
                                LiteralInteger {
                                    i: 3,
                                },
                                LiteralInteger {
                                    i: 4,
                                },
                            ],
                        ),
                        body: Null,
                    },
                    MatchArm {
                        conditions: None,
                        body: Null,
                    },
                ],
            },
        },
    },
]