Well, I have this option in my tool I developed. But I defined my own way due
my
own need (And well, I didn't know anything about this but I supposed to be
necesary
and I invented my own way not knowing the other notation)
for example:
a>>3
defines that a MUST appear three times ---> aaa is accepted
and
a<<3
defines that a can appear 0, 1, 2 or 3 times ---> epsilon, a , aa , aaa are
accepted
I would like to hear about your comments for my notation.
another way I was thinking is to use the power symbol:
a^3 a must appear 3 times ---> aaa is accepted
a~3 a can appear from 0 to 3 times ---> epsilon, a , aa , aaa are accepted
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