PRINT-DERIVE INPUT (DISPLAY): struct Foo
{ my_array : [bool ; { struct Inner { non_removed_inner_field : usize } 0 }] }
PRINT-DERIVE INPUT (DEBUG): TokenStream [
    Ident {
        ident: "struct",
        span: $DIR/nested-derive-cfg.rs:12:1: 12:7 (#0),
    },
    Ident {
        ident: "Foo",
        span: $DIR/nested-derive-cfg.rs:12:8: 12:11 (#0),
    },
    Group {
        delimiter: Brace,
        stream: TokenStream [
            Ident {
                ident: "my_array",
                span: $DIR/nested-derive-cfg.rs:14:5: 14:13 (#0),
            },
            Punct {
                ch: ':',
                spacing: Alone,
                span: $DIR/nested-derive-cfg.rs:14:13: 14:14 (#0),
            },
            Group {
                delimiter: Bracket,
                stream: TokenStream [
                    Ident {
                        ident: "bool",
                        span: $DIR/nested-derive-cfg.rs:14:16: 14:20 (#0),
                    },
                    Punct {
                        ch: ';',
                        spacing: Alone,
                        span: $DIR/nested-derive-cfg.rs:14:20: 14:21 (#0),
                    },
                    Group {
                        delimiter: Brace,
                        stream: TokenStream [
                            Ident {
                                ident: "struct",
                                span: $DIR/nested-derive-cfg.rs:15:9: 15:15 (#0),
                            },
                            Ident {
                                ident: "Inner",
                                span: $DIR/nested-derive-cfg.rs:15:16: 15:21 (#0),
                            },
                            Group {
                                delimiter: Brace,
                                stream: TokenStream [
                                    Ident {
                                        ident: "non_removed_inner_field",
                                        span: $DIR/nested-derive-cfg.rs:17:13: 17:36 (#0),
                                    },
                                    Punct {
                                        ch: ':',
                                        spacing: Alone,
                                        span: $DIR/nested-derive-cfg.rs:17:36: 17:37 (#0),
                                    },
                                    Ident {
                                        ident: "usize",
                                        span: $DIR/nested-derive-cfg.rs:17:38: 17:43 (#0),
                                    },
                                ],
                                span: $DIR/nested-derive-cfg.rs:15:22: 18:10 (#0),
                            },
                            Literal {
                                kind: Integer,
                                symbol: "0",
                                suffix: None,
                                span: $DIR/nested-derive-cfg.rs:19:9: 19:10 (#0),
                            },
                        ],
                        span: $DIR/nested-derive-cfg.rs:14:22: 20:6 (#0),
                    },
                ],
                span: $DIR/nested-derive-cfg.rs:14:15: 20:7 (#0),
            },
        ],
        span: $DIR/nested-derive-cfg.rs:12:12: 21:2 (#0),
    },
]