I have a very simple question, but I can't figure out the answer.
I have a suffix string and I want to extract the prefix of the substring if it ends with the suffix using c++ regular expressions and submatch.
For e.g.; if I have a string "abc def" and my regex is "(.+) def"; I want to return "abc":-
However, when I try to compute it using sub_match function, I get the entire string "abc def". Here's my code :-
int main() {
regex pattern("(.+) def");
smatch a;
string s = "pqr def";
bool b = regex_match(s, a, pattern);
cout << a.size() << a[0] << ";" << a[1] << ";";
}
Output :-
2pqr def;pqr def;
thanks, Amit
