PRINT-ATTR INPUT (DISPLAY): struct A(identity!(crate :: S));
PRINT-ATTR RE-COLLECTED (DISPLAY): struct A(identity ! ($crate :: S)) ;
PRINT-ATTR INPUT (DEBUG): TokenStream [
    Ident {
        ident: "struct",
        span: #3 bytes(LO..HI),
    },
    Ident {
        ident: "A",
        span: #3 bytes(LO..HI),
    },
    Group {
        delimiter: Parenthesis,
        stream: TokenStream [
            Ident {
                ident: "identity",
                span: #3 bytes(LO..HI),
            },
            Punct {
                ch: '!',
                spacing: Alone,
                span: #3 bytes(LO..HI),
            },
            Group {
                delimiter: Parenthesis,
                stream: TokenStream [
                    Ident {
                        ident: "$crate",
                        span: #3 bytes(LO..HI),
                    },
                    Punct {
                        ch: ':',
                        spacing: Joint,
                        span: #3 bytes(LO..HI),
                    },
                    Punct {
                        ch: ':',
                        spacing: Alone,
                        span: #3 bytes(LO..HI),
                    },
                    Ident {
                        ident: "S",
                        span: #3 bytes(LO..HI),
                    },
                ],
                span: #3 bytes(LO..HI),
            },
        ],
        span: #3 bytes(LO..HI),
    },
    Punct {
        ch: ';',
        spacing: Alone,
        span: #3 bytes(LO..HI),
    },
]
PRINT-ATTR INPUT (DISPLAY): struct B(identity!(::dollar_crate_external :: S));
PRINT-ATTR RE-COLLECTED (DISPLAY): struct B(identity ! ($crate :: S)) ;
PRINT-ATTR INPUT (DEBUG): TokenStream [
    Ident {
        ident: "struct",
        span: #10 bytes(LO..HI),
    },
    Ident {
        ident: "B",
        span: #10 bytes(LO..HI),
    },
    Group {
        delimiter: Parenthesis,
        stream: TokenStream [
            Ident {
                ident: "identity",
                span: #10 bytes(LO..HI),
            },
            Punct {
                ch: '!',
                spacing: Alone,
                span: #10 bytes(LO..HI),
            },
            Group {
                delimiter: Parenthesis,
                stream: TokenStream [
                    Ident {
                        ident: "$crate",
                        span: #10 bytes(LO..HI),
                    },
                    Punct {
                        ch: ':',
                        spacing: Joint,
                        span: #10 bytes(LO..HI),
                    },
                    Punct {
                        ch: ':',
                        spacing: Alone,
                        span: #10 bytes(LO..HI),
                    },
                    Ident {
                        ident: "S",
                        span: #10 bytes(LO..HI),
                    },
                ],
                span: #10 bytes(LO..HI),
            },
        ],
        span: #10 bytes(LO..HI),
    },
    Punct {
        ch: ';',
        spacing: Alone,
        span: #10 bytes(LO..HI),
    },
]