[
    Expression {
        expr: AssignmentOperation(
            Assign {
                left: Variable(
                    Variable {
                        start: (
                            4,
                            1,
                        ),
                        name: "a",
                        end: (
                            4,
                            4,
                        ),
                    },
                ),
                span: (
                    4,
                    4,
                ),
                right: LiteralInteger {
                    i: "4",
                },
            },
        ),
    },
    Expression {
        expr: AssignmentOperation(
            Assign {
                left: Variable(
                    Variable {
                        start: (
                            6,
                            1,
                        ),
                        name: "b",
                        end: (
                            6,
                            4,
                        ),
                    },
                ),
                span: (
                    6,
                    4,
                ),
                right: Match {
                    condition: Variable(
                        Variable {
                            start: (
                                6,
                                13,
                            ),
                            name: "a",
                            end: (
                                6,
                                15,
                            ),
                        },
                    ),
                    default: Some(
                        DefaultMatchArm {
                            body: Null,
                        },
                    ),
                    arms: [
                        MatchArm {
                            conditions: [
                                LiteralInteger {
                                    i: "1",
                                },
                                LiteralInteger {
                                    i: "2",
                                },
                                LiteralInteger {
                                    i: "3",
                                },
                                LiteralInteger {
                                    i: "4",
                                },
                            ],
                            body: Null,
                        },
                    ],
                },
            },
        ),
    },
]