• Andrew (4/4) Nov 18 2015 The documentation gives plenty of examples of how to use a static
• John Colvin (10/14) Nov 19 2015 Ugly but works:

Andrew <atrotman ebay.com> writes:

The documentation gives plenty of examples of how to use a static 
if with the arity trait, but how do I specify the constructor of 
an object as the parameter to arity?

Thanks

John Colvin <john.loughran.colvin gmail.com> writes:

On Thursday, 19 November 2015 at 06:20:28 UTC, Andrew wrote:
 The documentation gives plenty of examples of how to use a 
 static if with the arity trait, but how do I specify the 
 constructor of an object as the parameter to arity?

 Thanks

Ugly but works:

import std.traits;

struct A
{
	this(int a, int b){}
}

pragma(msg, arity!(A.__ctor)); // prints 2

You may have to experiment with __traits(getOverloads, ...) if 
you have multiple constructors and want to look at all of them.