PRINT-DERIVE INPUT (DISPLAY): struct Foo
{
    field :
    [bool ; { #[rustc_dummy] struct Inner { other_inner_field : u8, } 0 }]
}
PRINT-DERIVE INPUT (DEBUG): TokenStream [
    Ident {
        ident: "struct",
        span: $DIR/expand-to-derive.rs:16:9: 16:15 (#4),
    },
    Ident {
        ident: "Foo",
        span: $DIR/expand-to-derive.rs:16:16: 16:19 (#4),
    },
    Group {
        delimiter: Brace,
        stream: TokenStream [
            Ident {
                ident: "field",
                span: $DIR/expand-to-derive.rs:18:13: 18:18 (#4),
            },
            Punct {
                ch: ':',
                spacing: Alone,
                span: $DIR/expand-to-derive.rs:18:18: 18:19 (#4),
            },
            Group {
                delimiter: Bracket,
                stream: TokenStream [
                    Ident {
                        ident: "bool",
                        span: $DIR/expand-to-derive.rs:18:21: 18:25 (#4),
                    },
                    Punct {
                        ch: ';',
                        spacing: Alone,
                        span: $DIR/expand-to-derive.rs:18:25: 18:26 (#4),
                    },
                    Group {
                        delimiter: Brace,
                        stream: TokenStream [
                            Punct {
                                ch: '#',
                                spacing: Alone,
                                span: $DIR/expand-to-derive.rs:27:5: 27:6 (#0),
                            },
                            Group {
                                delimiter: Bracket,
                                stream: TokenStream [
                                    Ident {
                                        ident: "rustc_dummy",
                                        span: $DIR/expand-to-derive.rs:27:28: 27:39 (#0),
                                    },
                                ],
                                span: $DIR/expand-to-derive.rs:27:5: 27:6 (#0),
                            },
                            Ident {
                                ident: "struct",
                                span: $DIR/expand-to-derive.rs:28:5: 28:11 (#0),
                            },
                            Ident {
                                ident: "Inner",
                                span: $DIR/expand-to-derive.rs:28:12: 28:17 (#0),
                            },
                            Group {
                                delimiter: Brace,
                                stream: TokenStream [
                                    Ident {
                                        ident: "other_inner_field",
                                        span: $DIR/expand-to-derive.rs:30:9: 30:26 (#0),
                                    },
                                    Punct {
                                        ch: ':',
                                        spacing: Alone,
                                        span: $DIR/expand-to-derive.rs:30:26: 30:27 (#0),
                                    },
                                    Ident {
                                        ident: "u8",
                                        span: $DIR/expand-to-derive.rs:30:28: 30:30 (#0),
                                    },
                                    Punct {
                                        ch: ',',
                                        spacing: Alone,
                                        span: $DIR/expand-to-derive.rs:30:30: 30:31 (#0),
                                    },
                                ],
                                span: $DIR/expand-to-derive.rs:28:18: 31:6 (#0),
                            },
                            Literal {
                                kind: Integer,
                                symbol: "0",
                                suffix: None,
                                span: $DIR/expand-to-derive.rs:20:17: 20:18 (#4),
                            },
                        ],
                        span: $DIR/expand-to-derive.rs:18:27: 21:14 (#4),
                    },
                ],
                span: $DIR/expand-to-derive.rs:18:20: 21:15 (#4),
            },
        ],
        span: $DIR/expand-to-derive.rs:16:20: 22:10 (#4),
    },
]