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Enum std.traits.member arity
Returns the number of arguments of function func.
arity is undefined for variadic functions.
Declaration
enum arity(alias func) = Parameters!func.length;
Example
void foo(){}
static assert(arity!foo==0);
void bar(uint){}
static assert(arity!bar==1);
void variadicFoo(uint...){}
static assert(__traits(compiles,arity!variadicFoo)==false);
Authors
Walter Bright,
Tomasz Stachowiak (isExpressions