How to combine two regular expressions?

Question

Perl

We have a string, we need to find out whether both templates are included in it, the order of occurrence is not important.
i.e. replace :
if ($str =~/$pattern1/g && $str =~/$pattern2/g)
with something like:
if ($str =~/$pattern1 && $pattern2/g)

Answer 1

Since I left the answer, I will collect everything from the comments:
1) peeking, they work for a long time: 2) full enumeration, do not add 3rd pattern:
3) does not work if the pattern can occur more than once:
/($pattern1|$pattern2){2}/