I am trying to split() a string, and capture only some of the separators. I thought it would be more straightforward than it turns out to be. Heres one try that works: 
    my @list = grep defined($_), split /
                            \s+
                            |(?<=[A-Z])(?=[0-9]) # letter-number
                            |(?<=[0-9])(?=[A-Z]) # number-letter
                            |
                            (
                                ,
                                |\+
                                |-
                                |\/
                                |&
                            )
                    /xi,
                $string;

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I think this will always work, because the only ones i want to capture are in the parentheses, and when one of the others matches, the value of $1 is undef. But i was looking to do this with just split(), perhaps its not possible.

Is this a good way to do this, or am i missing something obvious?

UPDATE:
Ack! I already found something that doesnt work right: 

   129-129A & B-131 NORTH AV

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The result is quite strange though, some of the whitespace are captured, others are not. The list, printed one per line is: 
        token:  129
        token:  -
        token:  129
        token:  A
        token:
        token:  &
        token:
        token:  B
        token:  -
        token:  131
        token:  NORTH
        token:  AV

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In reply to split and capture some of the separators by shemp

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