It is possible to delimit regular expressions with other chars, and I though that perhaps the OP was stumbling over this feature of perl, and accidentally using round brackets as a delimiter, so I did a quick test
split ( ), '48 65 6c 6c 6f 2c 20 77 6f 72 6c 64 21'
split m( ), '48 65 6c 6c 6f 2c 20 77 6f 72 6c 64 21'
split qr( ), '48 65 6c 6c 6f 2c 20 77 6f 72 6c 64 21'
The second two expressions split the list, but without anything to tell perl that the first is a regular expressions it was not treated as one. I also tried:
split (\s+), '48 65 6c 6c 6f 2c 20 77 6f 72 6c 64 21'
But that resulted in a syntax error unrelated to split.
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