[re2c-general] HowTo? Prevent compiler warning from empty #define YYFILE(n)?

[Lynn A. <l_d...@ad...>]

With the DayOfWeek code I've been wrestling with, I get a compiler 
warning from vc7.1 related to:
warning C4390: ';' : empty controlled statement found; is this the 
intent?

because the following is generated, which ends up being a "nop":
if((YYLIMIT - YYCURSOR) < 9) YYFILL(9);

I've put #pragma statements around the code to remove the warning, but 
was wondering if there was a better way.

#pragma warning(disable : 4390)
int CDowRegex::Match(void)
{
/*!re2c
  ("Sunday"|"Sun")    { return 0; }
  // bla bla bla
*/
}
#pragma warning(default : 4390)

One of the prominent "selling points" of re2c is that it claims to 
generate warning free code. It is disconcerting to a newbie to have a 
warning show up. ... at least it was to this newbie. That's not a 
"confidence builder" to a newbie doing an evaluation of whether to 
spend the time to learn and perhaps use re2c in their project.

BTW, there was also a warning show up in the simple.re example related 
to unused variable. To a skeptical newbie, the homepage claims high 
performance and warning free code, so you wonder how good the 
performance is if the claim of warning free is overstated.