Especially since there is a widely recognized way to ignore a parameter:

    (void) a;

Every C programmer beyond weaning knows that.

▲ time4tea a day ago | parent | next [-]

The point really was that the unused method parameter should in almost all cases be removed, not that some trick should be used to make it seem used, and this is the wrong trick!

	▲	addaon a day ago \| parent \| next [-]
		Sometimes. But sometimes you have a set of functions that are called through function pointers that need the same signature, and one or more of them ignore some of the arguments. These days I’d spell that __attribute__((unused)); but it’s a perfectly reasonable case.
	▲	bluGill 15 hours ago \| parent \| prev [-]
		`#if otherbuild dosomething(param); #endif` the above type of thing happens once in a while. nos the paramater is needed but the normal build doesn't use it

▲ a day ago | parent | prev | next [-]

[deleted]

▲ stefan_ a day ago | parent | prev [-]

I'm sure thats disallowed for the C-style cast.

	▲	cpgxiii a day ago \| parent \| next [-]
		Fwiw, unused-cast-to-void is a case that GCC and Clang ignore when using -Wno-old-style-cast, which is what most projects prohibiting C-style casts are going to be using (or whatever the equivalent their compiler provides).
	▲	daringrain32781 a day ago \| parent \| prev [-]
		C++17 has the [[maybe_unused]] attribute.