Suppress unused variable warning in C++ => Compiler bug or code bug?

Question

Presently, I am using the following function template to suppress unused variable warnings:

template
void
unused(T const &) {
  /* Do n         


        

Answer 1

In GCC, you can define a macro as follows:

#ifdef UNUSED
#elif defined(__GNUC__)
# define UNUSED(x) UNUSED_ ## x __attribute__((unused))
#elif defined(__LCLINT__)
# define UNUSED(x) /*@unused@*/ x
#else
# define UNUSED(x) x
#endif 

Any parameters marked with this macro will suppress the unused warning GCC emits (and renames the parameter with a prefix of UNUSED_). For Visual Studio, you can suppress warnings with a #pragma directive.