Re: Config and "unused variables"

From: williamkempf_at_[hidden]
Date: 2001-09-25 07:50:42

--- In boost_at_y..., Darin Adler <darin_at_b...> wrote:
> Discussing: template <class T> inline void unused_variable(const 
T&) { }
> 
> on 9/24/01 1:30 PM, williamkempf_at_h... wrote:
> 
> > I currently have need of this for Boost.Threads, so... Any 
thoughts
> > or comments on this?
> 
> Great idea.
> 
> I also encountered this in tuple/test/tuple_test_bench.cpp. It's 
named
> "dummy" in there.
> 
> I like the name unused_variable.
> 
> I also seem some benefit, and little harm, in having another 
function
> template called unused_variables that takes multiple parameters as 
suggested
> by Fernando Cacciola.

The "harm" is mostly in the implementation.  How many parameters to 
you allow?  Most such multi-parameter templates in Boost are moving 
towards you the preprocessor library to generate the repetitious code 
for this, but that's a lot of plumbing for an extremely simple 
concept just used to shut the compiler up.  It just seems the cost 
(compile times, file size, header dependencies) outweigh the benefit 
(a little saved typing).  But I won't argue too strongly on this one.

Bill Kempf