Hello, I am having issues parsing strings with leading blanks with call prxnext if the first match is zero-length. This is the string to parse: foo foo foo foo foo and here is the code snippet: data read;
length var $50;
input var char50.;
datalines;
foo foo foo foo foo
;
run;
data regex;
set read;
regex = prxparse("/(?:^| )([a-z\-]*)(?= |$)/");
start = 1;
stop = length(var);
call prxnext(regex, start, stop, trim(var), pos, len);
do while (pos GT 0);
var_tall = prxposn(regex, 1, trim(var));
output;
call prxnext(regex, start, stop, trim(var), pos, len);
end;
run; The problem is that: - only twelve matches are found while there are thirteen present - the first zero-length match seems to overwrite the first non-zero one regex101.com finds 13 matches as expected. Is this a bug in SAS? Or in my code? Thank you for your help in advance.
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