[Bug c++/127780] [C++23] Using declaration in if immediately followed by colon incorrectly accepted

[gabravier at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127780

--- Comment #1 from Gabriel Ravier <gabravier at gmail dot com> ---
P.S.: The consumption of colons by cp_parser_init_statement seems strange to
me...