Unused variables and bugs

[via Digitalmars-d]

On Saturday, 23 August 2014 at 02:48:15 UTC, ketmar via
Digitalmars-d wrote:
> don't declare unused variables. really, this is extremely easy. 
> my 15+
> years of expirience in writing projects of different scale

What about:

- versioning
- debugging (commenting out debugging code)
- virtual functions
- future-proof function signatures

Of course the common way to deal with it in C is to tell the
compiler that it is intentional by casting to void:

(void) argc;
(void) argv;