Re: [boost] [concept_check.hpp] unreferenced formal parameter line 227

John D Lamb wrote:

Kevin Wheatley wrote:

...

Hi,

I was wondering if anybody has thought about adding a #else to the #if !defined(_ITERATOR) to ignore the unused variable warning in AssignableConcept::const_constraints() you get when compiling on VC7.1 ? (Or am I missing something subtle about the situation)

In gcc you can suppress a warning like this by explicitly casting to void: static_cast<void>( x );

Maybe the same method works in VC7 and gives cleaner compilation.

That works fine everywhere. It's similar to (void)0, which is a popular way to say "do nothing".