template <class B>
int AString<B>::FindFirstOf(int len, const tchar *s, int from) const
{
	ASSERT(from >= 0 && from <= GetLength());
	const tchar *ptr = B::Begin();
	const tchar *e = End();
	const tchar *se = s + (len * sizeof(tchar));
	if((s[0] & s[1]) != 0) {
		if(s[2] == 0) {
			__BREAK__;
			tchar c1 = s[0];
			tchar c2 = s[1];
			for(const tchar *bs = ptr + from; bs < e; bs++) {
				tchar ch = *bs;
				if(ch == c1 || ch == c2)
					return (int)(bs - ptr);
			}
			return -1;
		}
		if(s[3] == 0) {
			tchar c1 = s[0];
			tchar c2 = s[1];
			tchar c3 = s[2];
			for(const tchar *bs = ptr + from; bs < e; bs++) {
				tchar ch = *bs;
				if(ch == c1 || ch == c2 || ch == c3)
					return (int)(bs - ptr);
			}
			return -1;
		}
		if(s[4] == 0) {
			tchar c1 = s[0];
			tchar c2 = s[1];
			tchar c3 = s[2];
			tchar c4 = s[3];
			for(const tchar *bs = ptr + from; bs < e; bs++) {
				tchar ch = *bs;
				if(ch == c1 || ch == c2 || ch == c3 || ch == c4)
					return (int)(bs - ptr);
			}
			return -1;
		}
	}
	for(const tchar *bs = ptr + from; bs < e; bs++)
		for(const tchar *ss = s; ss < se; ss++)
			if(*bs == *ss)
				return (int)(bs - ptr);
	return -1;
}