Fixed compilation errors during macro expansion by vs2022

[cyrilcourvoisier]

On Visual Studio 2022 compiler, the macro expansion of DLOG_IF_F fails for some reasons. VA_ARGS is expanded into 'cond' variable of the VLOG_IF macro and : loguru::log() only got three arguments.

#define VLOG_IF_F(verbosity, cond, ...)
((verbosity) > loguru::current_verbosity_cutoff() || (cond) == false)
? (void)0
: loguru::log(verbosity, FILE, LINE, VA_ARGS)

I have added 'cond' parameter to DLOG_IF_F and DVLOG_IF_F so the signature maps correctly with VLOG_IF_F and it fixes the problem.

[abdes]

The expansion of the forwarded arguments is actually a general problem, and because you know the next one is the condition, you solved it by specifying that argument separately. However, I think it should simply stay blind and force expansion of the argument using an extra layer of expansion:

#    define EXPAND(x) x

#    define DLOG_F(verbosity_name, ...) EXPAND(LOG_F(verbosity_name, __VA_ARGS__))
#    define DVLOG_F(verbosity, ...) EXPAND(VLOG_F(verbosity, __VA_ARGS__))
#    define DLOG_IF_F(verbosity_name, ...) EXPAND(LOG_IF_F(verbosity_name, __VA_ARGS__))
#    define DVLOG_IF_F(verbosity, ...) EXPAND(VLOG_IF_F(verbosity, __VA_ARGS__))
#    define DRAW_LOG_F(verbosity_name, ...) EXPAND(RAW_LOG_F(verbosity_name, __VA_ARGS__))
#    define DRAW_VLOG_F(verbosity, ...) EXPAND(RAW_VLOG_F(verbosity, __VA_ARGS__))