{"ast_node_type":"function","tokens":[{"end":78,"kind":"keyword","start":0,"text":"do_check(r#\"fn"}]}
        do_check(r#"fn foo<T: $0Copy + Display>() {}"#, &["Copy", "Copy + "]);
        do_check(r#"fn foo<T: $0Copy>() {}"#, &["Copy"]);
        do_check(r#"fn foo<T: $0Copy +Display>() {}"#, &["Copy", "Copy +"]);