>> I need to specify a priority of match without regard to position.
Try look-ahead search. May this sketch give some help:
$line =~ s/^
(
(?= .*? $regex_1 ) .*? $regex_1 #FIRST PRIORITY
|
(?= .*? $regex_2 ) .*? $regex_2 #SECOND PRIORITY
)
/something/gmx;
Edit: removed text that caret is obsolete.
Upd.: I think my example (now striked-thourgh) simply reduces to the same but without look-ahead; see comment by Lanx.
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