Here is my problem
i use QRegexp in the QT library to do a capture of a prolog expression like this
ma(v,c).
with this regular expression
([a-z][A-Za-z0-9]*)(\\()([A-Za-z0-9]*,)*([A-Za-z0-9]*)(\\))(\\.)
in this case it gives me
"ma" "(" "v" "," "c" ")" "."
but when i try this prolog sentence
ma(v,c,r).
it only gives me
"ma" "(" "c" "," "r" ")" "."
Is there a way to capture all the quantifiers ?
In Regex, the groups are defined by the user, not by the expression to be parsed. I mean that the count of the groups will not increase or decrease depending on the data to be analyzed.
When you put ([A-Za-z0-9]*,)*, it doesn't means that regex will return zero or many groups that match this pattern [A-Za-z0-9]*,.
My suggestion is divide it into three operations. One for parse the whole structure, an another to split this v,c,r by using "," and one to put everything togheter:
Operation 1 - use this regex: ([a-z][A-Za-z0-9]*)(\\()((?:[A-Za-z0-9]*,?)*)(\\))(\\.)
Operation 2 - split the string at group(3) by using , to get each element.
Operation 3 - concatenate: group(1) + group(2) + result_of_operation_2 + group(4) + group(5)