PRINT-ATTR INPUT (DISPLAY): fn foo < T : MyTrait < MyStruct < { true } >> > () {}
PRINT-ATTR INPUT (DEBUG): TokenStream [
    Ident {
        ident: "fn",
        span: $DIR/attr-complex-fn.rs:19:1: 19:3 (#0),
    },
    Ident {
        ident: "foo",
        span: $DIR/attr-complex-fn.rs:19:4: 19:7 (#0),
    },
    Punct {
        ch: '<',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:19:7: 19:8 (#0),
    },
    Ident {
        ident: "T",
        span: $DIR/attr-complex-fn.rs:19:8: 19:9 (#0),
    },
    Punct {
        ch: ':',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:19:9: 19:10 (#0),
    },
    Ident {
        ident: "MyTrait",
        span: $DIR/attr-complex-fn.rs:19:11: 19:18 (#0),
    },
    Punct {
        ch: '<',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:19:18: 19:19 (#0),
    },
    Ident {
        ident: "MyStruct",
        span: $DIR/attr-complex-fn.rs:19:19: 19:27 (#0),
    },
    Punct {
        ch: '<',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:19:27: 19:28 (#0),
    },
    Group {
        delimiter: Brace,
        stream: TokenStream [
            Ident {
                ident: "true",
                span: $DIR/attr-complex-fn.rs:19:30: 19:34 (#0),
            },
        ],
        span: $DIR/attr-complex-fn.rs:19:28: 19:36 (#0),
    },
    Punct {
        ch: '>',
        spacing: Joint,
        span: $DIR/attr-complex-fn.rs:19:36: 19:37 (#0),
    },
    Punct {
        ch: '>',
        spacing: Joint,
        span: $DIR/attr-complex-fn.rs:19:37: 19:38 (#0),
    },
    Punct {
        ch: '>',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:19:38: 19:39 (#0),
    },
    Group {
        delimiter: Parenthesis,
        stream: TokenStream [],
        span: $DIR/attr-complex-fn.rs:19:39: 19:41 (#0),
    },
    Group {
        delimiter: Brace,
        stream: TokenStream [],
        span: $DIR/attr-complex-fn.rs:19:42: 19:44 (#0),
    },
]
PRINT-ATTR INPUT (DISPLAY): impl < T > MyTrait < T > for MyStruct < { true } > { #! [rustc_dummy] }
PRINT-ATTR INPUT (DEBUG): TokenStream [
    Ident {
        ident: "impl",
        span: $DIR/attr-complex-fn.rs:21:1: 21:5 (#0),
    },
    Punct {
        ch: '<',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:21:5: 21:6 (#0),
    },
    Ident {
        ident: "T",
        span: $DIR/attr-complex-fn.rs:21:6: 21:7 (#0),
    },
    Punct {
        ch: '>',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:21:7: 21:8 (#0),
    },
    Ident {
        ident: "MyTrait",
        span: $DIR/attr-complex-fn.rs:21:9: 21:16 (#0),
    },
    Punct {
        ch: '<',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:21:16: 21:17 (#0),
    },
    Ident {
        ident: "T",
        span: $DIR/attr-complex-fn.rs:21:17: 21:18 (#0),
    },
    Punct {
        ch: '>',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:21:18: 21:19 (#0),
    },
    Ident {
        ident: "for",
        span: $DIR/attr-complex-fn.rs:21:20: 21:23 (#0),
    },
    Ident {
        ident: "MyStruct",
        span: $DIR/attr-complex-fn.rs:21:24: 21:32 (#0),
    },
    Punct {
        ch: '<',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:21:32: 21:33 (#0),
    },
    Group {
        delimiter: Brace,
        stream: TokenStream [
            Ident {
                ident: "true",
                span: $DIR/attr-complex-fn.rs:21:34: 21:38 (#0),
            },
        ],
        span: $DIR/attr-complex-fn.rs:21:33: 21:39 (#0),
    },
    Punct {
        ch: '>',
        spacing: Alone,
        span: $DIR/attr-complex-fn.rs:21:39: 21:40 (#0),
    },
    Group {
        delimiter: Brace,
        stream: TokenStream [
            Punct {
                ch: '#',
                spacing: Joint,
                span: $DIR/attr-complex-fn.rs:23:5: 23:6 (#0),
            },
            Punct {
                ch: '!',
                spacing: Alone,
                span: $DIR/attr-complex-fn.rs:23:6: 23:7 (#0),
            },
            Group {
                delimiter: Bracket,
                stream: TokenStream [
                    Ident {
                        ident: "rustc_dummy",
                        span: $DIR/attr-complex-fn.rs:23:8: 23:19 (#0),
                    },
                ],
                span: $DIR/attr-complex-fn.rs:23:7: 23:20 (#0),
            },
        ],
        span: $DIR/attr-complex-fn.rs:21:41: 24:2 (#0),
    },
]