arity

Returns the number of arguments of function func. arity is undefined for variadic functions.

template arity (

alias func

) if (

isCallable!func &&

variadicFunctionStyle!func == Variadic.no

) {

enum size_t arity;

}

Examples

void foo(){}
static assert(arity!foo == 0);
void bar(uint){}
static assert(arity!bar == 1);
void variadicFoo(uint...){}
static assert(!__traits(compiles, arity!variadicFoo));

arity

Examples

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