pub unsafe extern "C" fn Perl_regexec_flags(
my_perl: *mut PerlInterpreter,
rx: *mut REGEXP,
stringarg: *mut c_char,
strend: *mut c_char,
strbeg: *mut c_char,
minend: isize,
sv: *mut SV,
data: *mut c_void,
flags: U32,
) -> I32