gistfile1.d

static int coordIndex(char c)() pure nothrow
{
	switch(c)
	{
		case 'x': return 0;
		case 'y': return 1;
		case 'z': return N > 2 ? 2 : -1;
		case 'w': return N > 3 ? 3 : -1;
		default: 
			return -1;
	}
}

static bool coordValid(char c)() pure nothrow { return coordIndex!c != -1; }

@property VectorTN!(T, coords.length) opDispatch(string coords)() pure const nothrow
   if(coords.length > 1 && coords.length <= 4 && coordsValidGetter!coords)
{
	VectorTN!(T, coords.length) result;
	result[0] = members[coordIndex!(coords[0])];
	result[1] = members[coordIndex!(coords[1])];
	static if(coords.length > 2)
		result[2] = members[coordIndex!(coords[2])];
	static if(coords.length > 3)
		result[3] = members[coordIndex!(coords[3])];
	return result;
}