- # regex should accept '+' operator
- [[ abcdef =~ a[b-z]+ ]]; echo 1:YES:$?
- # newline matches by "match any" patterns
- v='
- '
- [[ "$v" =~ . ]]; echo 2:YES:$?
- [[ "$v" =~ "[$v]" ]]; echo 3:no:$? # hmm bash does return 1... why?
- [[ "$v" =~ [^a] ]]; echo 4:YES:$?
- # should work even without quotes:
- [[ $v =~ . ]]; echo 2u:YES:$?
- [[ $v =~ [$v] ]]; echo 3u:YES:$?
- [[ $v =~ [^a] ]]; echo 4u:YES:$?
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