initMemberFrom

Useful in copy constructors for DRY.

Usage:

class myClass
{
	// Declarations of 'someVar', 'a1', 'b', and 'c' here.
	this(myClass copyOf)
	{
		mixin(initMemberFrom("copyOf", "someVar"));
		mixin(initMemberFrom("copyOf", "a1", "b", "c"));
	}
}

Turns Into:

class myClass
{
	// Declarations of 'someVar', 'a1', 'b', and 'c' here.
	this(myClass copyOf)
	{
		this.someVar = copyOf.someVar;
		this.a1 = copyOf.a1;
		this.b = copyOf.b;
		this.c = copyOf.c;
	}
}